[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.1"]
[White "Sheng, Joshua"]
[Black "Liang, Dustin"]
[Result "1-0"]
[ECO "B98"]
[WhiteElo "2474"]
[BlackElo "1960"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,53,42,0,45,14,38,-8,18,-45,31,8,58,43,28,43,73,60,68,41,102,89,102,95,186,176,262,253,264,253,275,267,260,261,429,509,1031,1091,1069,1083,1058,1047]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qe2 Qc7 {B98: Sicilian Najdorf: 6 Bg5 e6 7 f4 Be7, sidelines.} 9. O-O-O Nbd7 10. Kb1 b5 {The position is equal.} 11. a3 ({Better is} 11. e5 $11 dxe5 12. fxe5 Nxe5 13. Bf4) 11... Bb7 (11... Rb8 $15) 12. g4 Nb6 (12... h6 $5 {[%cal Rh6g5]} 13. Bh4 Rc8 $11) 13. Bg2 h6 14. Bh4 {[#]} O-O-O $146 ({Predecessor:} 14... Rb8 15. Be1 Qc4 16. Rd3 Nfd7 17. h4 g6 18. Nb3 Qc7 19. Bg3 Nc4 20. Re1 Bf6 {½-½ (28) Papp,G (2596)-Nitin,S (2377) Zalakaros 2016}) 15. Bf2 Nfd7 16. h4 g6 (16... Kb8 $14) 17. f5 $36 {[%mdl 2048] White is really pushing.} e5 18. Nb3 Nc4 (18... gxf5 $16 19. gxf5 Nc4) 19. a4 $1 $18 Bc6 (19... b4 $142 20. Nd5 Bxd5) 20. axb5 axb5 21. Nd5 Bxd5 22. Rxd5 ({And not} 22. exd5 gxf5 23. gxf5 Nf6 $11) 22... Qc6 {[#]} 23. Rh3 $1 Nf6 $2 {[#]} (23... Kc7) 24. Na5 $1 {[%cal Ra5c6][%mdl 512] White is clearly winning.} Qa6 {[#]} (24... Nxa5 $142 25. Rxb5 Nc4) 25. Rxb5 $3 {[%mdl 512]} Qxb5 26. Nxc4 {Intending Nb6+ and mate.} Kc7 27. Rc3 {Weighted Error Value: White=0.13/Black=0.46} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.2"]
[White "Shevkunov, Vladyslav"]
[Black "Stearman, Josiah"]
[Result "0-1"]
[ECO "A11"]
[WhiteElo "1945"]
[BlackElo "2391"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,114,0,31,22,16,28,26,13,20,12,8,10,25,18,19,19,15,20,20,15,7,9,11,0,0,0,10,0,0,0,38,39,27,16,53,0,0,-16,-4,-9,-19,-12,30,28,58,64,62,6,3,0,101,86,97,66,183,168,202,16,37,0,0,0,0,0,0,0,0,0,0,0,0,0,6,6,3,-256,-249,-445,-445,-433,-425,-554,-548,-545,-528,-540,-506,-658,-555,-5965,-1502,-12834,-12835,-12837,-12837,-12846,-12836,-12845,-12843,-12844,-12838,-12840,-12841,-12849,-12842]} 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. Bg2 Bf5 5. cxd5 cxd5 6. Qb3 Qd7 7. Ne5 {A11: English Opening: 1...c6.} Qc7 {[%mdl 64] [#] Double Attack} 8. Nc3 Nc6 (8... Qxe5 $2 9. Qxb7 e6 10. d3 $18) 9. Nxc6 {White has an edge.} bxc6 10. d4 {[#]} Rb8 $146 ({Predecessor:} 10... e6 11. Bf4 Qb6 12. O-O Be7 13. Rfc1 O-O 14. Na4 Qxd4 15. Rxc6 Ng4 16. e3 Qd2 {0-1 (22) Zniber,R (1994)-Gelle,I (2325) Split 2019}) 11. Qa4 {Hoping for Bf4.} e6 12. Bf4 Bd6 13. Bxd6 Qxd6 14. b3 O-O 15. Rc1 Nd7 16. O-O a5 17. Nd1 ({But not} 17. Qxa5 $2 Ra8 $19) 17... Rb5 {Threatens to win with ...Nb6.} 18. Nc3 $1 {[%cal Rc3b5]} Rbb8 19. Nd1 ({Wrong is} 19. Qxa5 $2 Ra8 $19) 19... Rb5 20. Nc3 $1 {[%cal Rc3b5]} Rb4 21. Qxa5 Rxd4 22. Na4 Rc8 23. e3 (23. Nc5 $14) 23... Rb4 $11 24. Rc3 Rbb8 {aiming for ...Ra8.} 25. Qa6 Ra8 26. Qe2 $1 c5 27. e4 Bg6 28. exd5 $1 exd5 29. Rd1 ({White should play} 29. Qd2 $1 $14) 29... Nf6 30. Qb5 {[%cal Rc3c5]} Rab8 (30... h6 $11 {remains equal.}) 31. Rxc5 $16 {[%cal Rg2d5]} Re8 32. Qc6 Qe5 (32... Qf8 $14 33. Rcc1 (33. Bxd5 Rec8 $17) 33... Rbc8) 33. Nc3 $18 Bh5 34. Bxd5 $2 (34. Rc1 $18) 34... Qe7 $11 35. Rf1 {Black must now prevent Bg2.} Nd7 $1 {[%cal Rd7c5]} 36. Rc4 $1 {And now Qc7 would win.} Ne5 {[%mdl 64] [#] Double Attack} 37. Qc7 {Qxe7 is the strong threat.} Nxc4 38. Qxe7 $1 Rxe7 39. Bxc4 Bf3 40. a4 Re5 41. Nb5 Kf8 42. Nd4 Bd5 {next ...Bxc4 is good for Black.} 43. f4 $2 {[%mdl 8192]} (43. Ra1 $11) 43... Bxc4 $19 44. fxe5 $2 (44. bxc4 Rc5 45. Nf3) 44... Bxf1 {Black is clearly winning.} 45. Kxf1 {[%mdl 4096] Endgame KR-KN} Rb4 46. Nc6 Rxb3 47. a5 Ra3 48. Kf2 Ke8 49. h4 Kd7 50. Nb4 Rxa5 51. Nd3 h5 52. Ke3 Ke6 53. Kf3 Kf5 54. Nf4 Ra3+ 55. Kf2 g6 56. Nd5 Kxe5 57. Ne3 Ke4 {What a bad dream for White.  Weighted Error Value: White=0.50/Black=0.12} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.3"]
[White "Kumar, Nikhil"]
[Black "Dill, James"]
[Result "1-0"]
[ECO "E05"]
[WhiteElo "2328"]
[BlackElo "1918"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,101,36,29,22,54,68,88,85,102,96,114,102,173,71,77,81,106,21,57,0,0,0,0,0,0,0,0,-10,-17,-23,-25,-21,0,0,-6,-6,0,-28,19,-20,0,-17,0,0,31,38,83,83,75,77,81,33,34,31,38,33,173,51,128,121,133,99,500,181,164,164,218,215,218,218,269,211,487,487,487,484,466,390,382,340,340,297]} 1. d4 Nf6 2. Nf3 d5 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. c4 dxc4 7. Qc2 a6 8. Qxc4 b5 9. Qc2 Bb7 10. Bd2 Nbd7 11. Ba5 Rc8 12. Nbd2 {E05: Open Catalan: 5 Nf3 Be7.} Qe8 13. b4 $1 Nb6 14. Rac1 {White is better.} Bd6 15. a3 {[#]} Qe7 $146 ({Predecessor:} 15... Nfd7 16. Ng5 f5 17. Bxb7 Rb8 18. Bg2 Qh5 19. Nxe6 Rf6 20. Nxc7 {1-0 (29) Zeberski,J (2337)-Watorek,M (2100) Poronin 2013}) 16. Rfe1 Nbd7 (16... Rfe8 $16) 17. Nb3 (17. e4 $18 {has better winning chances.}) 17... Be4 $16 18. Qd1 e5 19. dxe5 (19. Bh3 $16) 19... Nxe5 $11 20. Nfd2 (20. Nbd2 $14) 20... Bxg2 21. Kxg2 c5 22. bxc5 Bxc5 23. Nxc5 Rxc5 24. Rxc5 Qxc5 25. Bb4 Qc6+ 26. Kg1 Rd8 27. Qa1 Qe6 28. Bc3 Nc4 29. Nf3 Ne8 30. e4 g6 31. h4 Qd6 32. Bb4 Qd3 33. Ne5 Nxe5 34. Qxe5 {Bc3 is the strong threat.} Qd4 35. Qe7 {[%csl Gb4][%cal Re7f8] [#]} Ng7 36. Rc1 {Hoping for Rc7.} Re8 37. Qb7 Qxe4 38. Qxa6 Qd3 (38... Nf5 $14 39. Re1 (39. Qxb5 Nd4 $17) 39... Qa8) 39. Qf6 ({Better is} 39. a4 $18) 39... Re6 (39... Qf5 $14 40. Qxf5 Nxf5) 40. Rc8+ $16 Ne8 41. Qf4 $40 {[%mdl 128] [#] Black must now prevent Qh6. Black is in trouble.} Qe4 $2 {[%mdl 8192]} (41... h5 $16 {is more resistant.} 42. Bc3 (42. Qh6 Qd1+ 43. Kh2 Qf3 $16) 42... f6) 42. Qxe4 $2 (42. Qh6 {[%csl Gb4][%cal Rh6f8]} Re7 43. Bxe7 Qxe7 44. Rb8) 42... Rxe4 $18 {[%mdl 4096] Endgame KRB-KRN} 43. Rc5 Nd6 (43... f5 $142 44. Rxb5 Nc7 45. Rb8+ Re8) 44. Rd5 Nc4 45. Rxb5 Kg7 46. Bc3+ Kh6 $2 (46... Kf8 47. Bb4+ Ke8 48. Rb8+ Kd7 49. Rb7+ Ke8) 47. Rb4 Nd6 48. Rxe4 Nxe4 49. Bb4 Nf6 50. a4 Nd5 51. Bd6 {Weighted Error Value: White=0.34/Black=0.49} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.4"]
[White "Snow, Zachary"]
[Black "Liang, Jason"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1909"]
[BlackElo "2317"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,88,13,21,-24,-24,-35,-52,-89,-95,-94,-117,-86,-65,-79,-78,-83,-62,-124,-118,-111,-93,-105,-96,-129,-129,-184,-192,-198,-119,-129,-129,-129,-106,-135,-99,-142,-140,-205,-197,-306,-300,-308,-312,-304,-295,-297,-274,-367,-350,-491,-486,-486,-470,-480,-466,-491,-476,-513,-508,-533,-518,-534,-522,-525,-413,-1020,-524,-650,-510,-827,-469,-560,-447,-593,-571,-593,-570,-658,-626]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Ne7 6. O-O c5 {6...h6 is the modern continuation.} 7. Nc3 {B12: Caro-Kann: Advance Variation.} Nec6 {[#]} 8. Bf4 $146 ({Predecessor:} 8. Bg5 Qa5 9. a3 Nxd4 10. Nxd4 cxd4 11. Nb5 h6 12. Bd2 Qb6 13. Bb4 Bxb4 14. axb4 Nc6 {½-½ (40) Smirin,I (2625)-Karpov,A (2775) Cap d'Agde 1996}) 8... a6 9. a3 {Black is slightly better.} cxd4 10. Nxd4 Nxd4 11. Qxd4 Bxc2 12. Rac1 Nc6 {[%cal Bb8c6,Bc6d4,Bd4f5][%mdl 32]} 13. Qd2 Bg6 14. Bd3 (14. b4 $15) 14... Bxd3 15. Qxd3 Be7 16. Qg3 g6 17. Bh6 Nd4 18. Rcd1 (18. Qh3 $17 Nf5 19. Rfd1) 18... Nf5 $19 {[%mdl 64] [#] Double Attack} 19. Qh3 Bg5 (19... Qb6 $19 20. Bc1 O-O) 20. Bxg5 $17 Qxg5 21. f4 Qh5 22. Qd3 O-O 23. h3 {Hoping for g4.} Qh4 24. Na4 {[#]} (24. g4 $17 Ne7 25. Kh2) 24... Rac8 $1 $19 25. b4 (25. Nb6 $142 Rc7 26. Rf3) 25... Rc4 26. Nc5 Rc8 ({Not} 26... Rxf4 27. Nxb7 Rd4 28. Qf3 $17) 27. Qf3 Ng3 28. Rf2 b6 29. Nd7 Ne4 30. Rb2 (30. Nf6+ {is a better defense.} Nxf6 31. exf6) 30... Qd8 31. Nf6+ Nxf6 32. exf6 Qxf6 33. Rf2 Rc3 34. Rd3 b5 35. Rfd2 Rxd3 36. Rxd3 {[%mdl 4096] Endgame KQR-KQR} Rc1+ 37. Kh2 Qa1 38. Re3 (38. Qe2 $142) 38... Rf1 {Black is clearly winning.} 39. Qg4 Qf6 40. Rf3 (40. Qg5 $142 Qxf4+ 41. Qxf4 Rxf4 42. Kg3) 40... Rc1 41. Rf2 Qd4 42. Qf3 Rc3 43. Qe2 Rxa3 44. h4 h5 {Weighted Error Value: White=0.59/Black=0.31} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.5"]
[White "Cervantes Landeiro, Thalia"]
[Black "Amburgy, Ryan"]
[Result "0-1"]
[ECO "E15"]
[WhiteElo "2311"]
[BlackElo "1885"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,112,0,8,-22,-29,-24,-18,-19,-13,-13,-13,-16,-16,-23,-30,-51,-37,-44,-52,-39,-45,-102,-97,-107,-109,-106,-114,-114,-104,-96,-84,-245,-237,-277,-278,-291,-282,-375,-181,-153,-108,-117,-80,-83,-70,-98,-91,-98,-90,-91,-78,-101,-90,-89,-91,-94,-76,-131,-125,-142,-142,-142,-143,-205,-148,-131,-26,-443,-320,-586,-521,-1094,-1048,-2029,-1616,-1885,-1744,-1550,-1453,-1033,-750,-29967,-29960,-5813,-825,-3128,-2121,-6510,-6422,-12791,-9533,-7116,-7104,-29977,-29978,-6103,-5106]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Bg2 c6 8. O-O d5 9. Ne5 Nfd7 10. cxd5 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} Nxe5 11. dxe5 {[#] Black must now prevent d6.} cxd5 12. Bc3 {[#] The position is equal.} Nd7 $146 ({Predecessor:} 12... Nc6 13. Nd2 O-O 14. Nf3 Rc8 15. Qd2 Ba3 16. Rfd1 Qe7 17. Rab1 Bb5 18. Bf1 a5 {0-1 (37) Krumpacnik,D (2410)-Zhigalko,A (2529) Pardubice 2007}) 13. Nd2 Rc8 14. Bb2 O-O 15. a3 Qc7 16. Rc1 Qb8 17. Rxc8 Rxc8 18. Nf3 Qc7 $36 {[%mdl 2048] Black fights for an advantage.} 19. Nd4 (19. b4 $15) 19... Nxe5 $17 20. Qa1 Bf6 21. Rc1 Qb8 22. f4 Rxc1+ 23. Qxc1 Nd7 24. e4 $2 (24. b4 $17) 24... dxe4 $19 25. Bxe4 Nc5 26. Bc2 Qd6 27. Nf3 Bxb2 (27... Nd3 $142 28. Bxd3 Qxd3 {[%mdl 64] Double Attack} 29. Bxf6 Qxf3) 28. Qxb2 g6 29. Qd4 Qxd4+ (29... Qc7 {keeps more tension.} 30. Qe5 Qc8 31. Qc3 Bb7 32. b4 Bxf3 33. Qxf3 Nd7) 30. Nxd4 $17 {[%mdl 4096] Endgame KBN-KBN} Bb7 31. Kf2 Kf8 32. Ke3 Ke7 33. b4 Nd7 34. Bd3 e5 35. fxe5 Nxe5 36. Be2 f5 37. Kf4 (37. Nb5 $142) 37... Kf6 38. h4 h6 39. Nb5 Ba6 40. Ke3 (40. a4 $17) 40... Ng4+ 41. Kd4 Nf2 ({Better is} 41... g5 $17 42. a4 Ne5 43. hxg5+ hxg5) 42. a4 $2 {[%mdl 8192]} (42. Nxa7 $11 Bxe2 43. Ke3) 42... Nh1 43. g4 $2 (43. Nc3 Bb7 44. g4) 43... Ng3 $19 44. Bf3 Bxb5 45. axb5 fxg4 46. Bxg4 {KB-KN} Nf5+ 47. Ke4 Nxh4 48. Kd5 Nf5 {[#] Threatens to win with ...Ne3+.} 49. Kc6 h5 50. Bd1 Nd4+ (50... Ne3 $142 51. Be2 h4) 51. Kb7 Nxb5 52. Ka6 Nc3 53. Bf3 h4 54. Kxa7 b5 55. Kb6 h3 56. Kc5 Ke5 {Weighted Error Value: White=0.93/Black=0.43} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.6"]
[White "Shundi, Matias"]
[Black "Vivekananthan, Anish"]
[Result "0-1"]
[ECO "B28"]
[BlackElo "2305"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,108,88,64,66,50,57,40,55,29,37,0,0,0,0,-17,-19,-16,-12,-29,-28,-23,-16,-28,-2,-4,-4,-29,-24,-23,-23,-43,-18,-18,-14,-22,-19,-49,-54,-111,-19,-19,-20,-20,33,-10,0,-16,-12,-25,-31,-19,-12,-45,-9,-29,0,-141,-4,-9,0,0,0,0,0,0,0,0,0,0,0,-17,-18,-25,-31,-32,-91,-1140,-781,-29971,-29968,-29945,-11179,-6102,-6098,-6102,-6095,-6224,-6199,-29986,-29987,-29987,-29988,-29988,-29989,-29989,-29990,-29991,-29992]} 1. e4 a6 2. d4 b5 3. Bd3 Bb7 4. Nf3 e6 5. O-O c5 6. c3 Nf6 7. Re1 cxd4 {B28: Sicilian: 2 Nf3 a6 (O'Kelly Variation).} 8. cxd4 Be7 9. Bg5 d6 {White is slightly better.} 10. Nc3 Nbd7 {[%cal Bb8d7,Bd7b6,Bb6d5][%mdl 32]} 11. e5 (11. Rc1 {seems wilder.} h6 12. Bf4 O-O 13. a3 Nb6 14. Nd2) 11... dxe5 $1 12. dxe5 Nd5 {[#]} 13. Nxd5 $146 ({Predecessor:} 13. Ne4 O-O 14. Nd6 Rb8 15. Nxb7 Rxb7 16. h4 Nc5 17. Bxe7 Nxe7 18. Bxh7+ Kh8 19. Bc2 {1-0 (28) Garcia Blanco,O (2252)-Andonegui Echeburua,J (1627) Las Palmas 2018}) 13... Bxd5 14. Bxe7 Qxe7 15. Be4 Nb6 16. Qd4 Bxe4 17. Qxe4 Nd5 18. Nd4 O-O 19. a3 g6 20. Rac1 Rac8 21. Rc2 Rc7 22. Rec1 Rfc8 23. g3 Kg7 24. Nc6 Qd7 {[%cal Rc7c6]} 25. Nb4 {[#]} ({White should try} 25. Nd4 $15) 25... Rxc2 (25... Nxb4 $1 $17 26. Rxc7 Rxc7 27. Rxc7 Qxc7 28. axb4 Qc1+ 29. Kg2 Qxb2) 26. Rxc2 $11 Rxc2 27. Qxc2 a5 (27... Nxb4 $11 28. axb4 g5) 28. Nxd5 (28. Qc6 $5 {[%cal Rc6d7]} Nb6 29. Qxd7 (29. Qxb6 axb4 30. Qe3 bxa3 $11) 29... Nxd7 30. Nc6 $11) 28... exd5 $14 {[%mdl 4096] Endgame KQ-KQ} 29. Qd3 d4 30. f4 Qd5 31. Kf2 h5 32. h3 Kf8 33. g4 h4 34. Ke1 (34. e6 $11) 34... Ke7 ({Better is} 34... Qh1+ $17 35. Ke2 Qh2+ 36. Kd1 Qxb2) 35. Kd2 $11 Kd7 36. f5 g5 37. e6+ {[%mdl 64] Decoy} fxe6 38. fxe6+ Kxe6 39. Qg6+ Kd7 40. Qg7+ Kc6 41. Qf6+ Kc5 {Strongly threatening ...Kc4.} 42. Qe7+ Kc4 43. Qc7+ Kb3 {aiming for ...Qg2+.} 44. Qxa5 $2 {[%mdl 8192] This costs White the game.} (44. Qc2+ $17 Ka2 45. b4+ Kxa3 46. bxa5) 44... Qg2+ 45. Kd1 Qf1+ 46. Kd2 Qf2+ (46... Qf4+ $142 47. Kd1 Qf1+ 48. Kd2 Qf2+ 49. Kd1 Qc2+ 50. Ke1 d3 51. Qd2 Kxb2 52. Qe3 Qc1+ 53. Kf2 d2 54. Qe8 Qc5+ 55. Ke2 Kc1 56. Qe3 Qxe3+ {[%mdl 64] Overworked Piece} 57. Kxe3 d1=Q 58. Ke4 Qf1 59. Kd4 Qxh3 {[%mdl 64] Double Attack} 60. a4 bxa4 61. Ke5 Qxg4 62. Kd6 h3 63. Ke5 h2 64. Kd5 h1=Q+ 65. Kc5 Qb7 66. Kd6 Qbd7+ 67. Ke5 Qgf5#) 47. Kd1 $19 Qc2+ 48. Ke1 Qc1+ 49. Ke2 Qxb2+ 50. Kd1 Qc2+ {Black mates.} 51. Ke1 {[#]} Qc3+ $1 52. Qxc3+ dxc3 53. Kd1 Kb2 54. a4 c2+ {Weighted Error Value: White=0.64/Black=0.28} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.7"]
[White "Chasin, Nico"]
[Black "Deshpande, Aaryan"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2303"]
[BlackElo "1888"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,75,4,60,36,70,64,62,58,67,64,63,56,62,73,66,55,211,205,222,85,104,56,108,120,177,163,169,29,25,20,16,13,13,13,9,13,13,14,219,233,214,202,259,89,178,170,285,294,484,481,531,511,886,493,29990,29989,1579,1495]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O exd4 8. Nxd4 Re8 9. f3 Nc6 10. Nc2 Be6 (10... Nd7 $11) 11. Be3 {E94: King's Indian: Classical: 6 Be2 e5 7 0-0: Various Black 7th moves.} Ne5 12. b3 Nc6 13. Qd2 {White is slightly better.} Nd7 {[#]} 14. Rad1 $146 ({Predecessor:} 14. Rac1 f5 15. Nd4 Nxd4 16. Bxd4 Bxd4+ 17. Qxd4 Qf6 18. Qd2 fxe4 19. Nxe4 Qe5 20. Rfe1 a5 21. c5 d5 22. Ng5 c6 23. Ba6 Qb8 24. Nxe6 bxa6 25. Qd4 {1-0 (25) Silva,E (2045)-Barreto Filho,C (2300) Dois Irmaos 2008}) 14... f5 15. exf5 Bxc3 16. Qxc3 Bxf5 17. c5 d5 $2 (17... dxc5 $14 18. Bc4+ (18. Bh6 Qf6 $11) 18... Be6) 18. Rxd5 $18 (18. Bh6 Qf6 $14) 18... Qf6 19. Nd4 (19. Qd2 $1 $18) 19... Be6 $16 20. Rg5 Bf7 (20... Nxd4 $14 21. Qxd4 Bxb3) 21. Rg4 $1 Qe5 (21... Nxc5 $16 22. Bb5 Ne6) 22. Re4 $18 Qxc5 23. Rxe8+ (23. Bc4 $1 $18 Bxc4 24. Nxc6 (24. bxc4 Nf6 $11) (24. Qxc4+ Qxc4 25. bxc4 Rxe4 $15) 24... Qxc6 25. Rxc4) 23... Rxe8 $11 24. Qxc5 Nxc5 25. Kf2 {Hoping for Nxc6.} Nb4 26. Rd1 $36 {[%mdl 2048] White fights for an advantage.} Nxa2 27. Nb5 {[%mdl 64] Discovered Attack} Nxb3 28. Rd7 Nbc1 $2 (28... a6 $1 $11 {and Black stays safe.} 29. Nxc7 Rf8) 29. Bf1 $18 a6 30. Nxc7 Rc8 31. Bf4 $2 (31. g3 $1 $18 {and the rest is easy.}) 31... b5 {[#]} (31... Nb3 $16 {was called for.}) 32. g3 $1 Nb3 {[#]} (32... h6 {might work better.} 33. h4 (33. Bxh6 b4 $16) (33. Nxa6 g5 $16) 33... h5) 33. Bh3 $1 ({Not} 33. Nxa6 Bc4 $16) 33... Nc5 $2 {[#]} (33... Rb8 34. Rxf7 {[%mdl 64] Remove Defender} Kxf7) 34. Rxf7 $1 {[%mdl 512]} Rd8 (34... Kxf7 35. Bxc8) 35. Re7 b4 (35... Nd3+ $142 36. Ke3 Nxf4) 36. Ne6 b3 (36... Nd3+ $18 37. Ke3 Nxf4 38. Nxf4 Kh8) 37. Nxd8 Nd3+ 38. Ke3 {Weighted Error Value: White=0.30/Black=0.72} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.8"]
[White "Johnson, Donald"]
[Black "Sandoval Mercado, Carlos"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1857"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,95,12,10,28,18,15,14,10,6,6,8,4,7,35,0,22,23,22,0,0,0,-10,-4,-20,-38,-45,-82,-74,-99,-68,-113,-108,-104,-65,-241,-233,-810,-808,-814,-804,-912,-879,-1344,-1367,-1437,-1503,-1467,-1581,-1506,-1506,-1421,-1406,-29974,-29966,-29986,-29987,-29987,-29988,-29987,-29988,-29987,-29988,-29989,-29990,-29990,-29990,-29991,-29991,-29991,-29992,-29992,-29993,-29993,-29993,-29993,-29994,-29994,-29995,-29995,-29996,-29997,-29998,-29998,-29999,-29999]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nde2 h5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 8. Bg5 Be6 9. Bxf6 Qxf6 {The position is equal.} 10. Nd5 Qd8 11. Qd3 Nd7 12. O-O-O Rc8 13. Kb1 Bxd5 (13... Nc5 $5 {[%cal Rc5d3]} 14. Qf3 Bxd5 15. Rxd5 Be7 $11) 14. Qxd5 {[#]} Qb6 $146 ({Predecessor:} 14... b5 15. Qd2 Nb6 16. h4 Be7 17. g3 Rc5 18. Nc1 Qa8 19. Qe3 O-O 20. Nb3 Nc4 21. Bxc4 Rxc4 {½-½ (39) Mastrovasilis,D (2608)-Dziuba,M (2564) Poland 2015}) 15. f4 Nf6 16. Qd3 h4 17. Nc3 exf4 18. Nd5 Nxd5 $1 19. exd5 Be7 20. Qe4 Kd8 {...Bf6 is the strong threat.} 21. Rd3 Re8 22. Rb3 Qf2 $40 {[%mdl 128] Black is up to no good.} 23. Rf3 $2 {This move loses the game for White.} ({But not} 23. Rxb7 $2 Bf6 $19) (23. Bd3 $15) 23... Qd2 $19 {[%cal Rd2d1]} 24. Bd3 $2 (24. Qe2 Rxc2 25. Qxd2 Rxd2 26. Kc1 Rxd5 27. Be2) 24... Bg5 25. Qxe8+ Kxe8 26. Be4 g6 27. Rhf1 Qb4 28. Bd3 Bf6 {[%csl Gf6][%cal Rb4b2]} 29. c3 Bxc3 {[%csl Gc3][%cal Rb4b2]} 30. R3f2 Be5 31. Re2 Kf8 32. Ref2 Rc3 {Black mates.} 33. Rd1 {[#]} Rxd3 $1 {[%mdl 64] Deflection} 34. Rxd3 Qe1+ {[%mdl 64] Double Attack} 35. Kc2 Qxf2+ {[%mdl 64] Double Attack} 36. Rd2 Qg3 37. Re2 {[#]} f3 $1 38. gxf3 Qxf3 39. Rd2 Qxh3 40. a3 Qf5+ 41. Kb3 h3 42. Kc4 h2 43. Rxh2 Qe4+ 44. Kb3 Qd3+ 45. Ka2 Bxh2 46. Ka1 Qc2 47. a4 {[#]} Be5 $1 {[%csl Ge5][%cal Rc2b2]} 48. a5 Qxb2# {Weighted Error Value: White=1.03/Black=0.08} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.9"]
[White "Asaria, Danial"]
[Black "Kumar, Arya"]
[Result "1-0"]
[ECO "B11"]
[WhiteElo "2284"]
[BlackElo "1855"]
[Annotator "TA"]
[PlyCount "43"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,43,0,18,10,26,12,35,20,25,33,63,71,126,127,492,500,872,-159,-150,-1532,1095,1088,1510,1493,29982,29983,29992,29993,29993,29989,29994,29995]} 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bxf3 5. Qxf3 e6 6. g3 Nd7 7. Bg2 Ngf6 8. d4 {B11: Caro-Kann: Two Knights Variation.} Bb4 9. e5 Ne4 10. O-O {White is slightly better.} Bxc3 11. bxc3 Qa5 12. Rb1 {[#]} Qxc3 $146 ({Black should try} 12... Qa6) ({Predecessor:} 12... O-O-O 13. Qxf7 Nxc3 14. Rb2 Ne2+ 15. Kh1 Rhf8 16. Qxg7 Rxf2 17. Bf4 Rxf1+ 18. Bxf1 Qe1 {0-1 (24) Liwak,P (2319)-Mista,A (2454) Wisla 2000}) 13. Rxb7 $16 Qxd4 $2 {[%mdl 8192] [#]} (13... Qxf3 $16 {is more resistant.} 14. Bxf3 Nc3) 14. Rxd7 $18 Kxd7 (14... O-O $142 15. Qxe4 Qxe4) 15. Qf4 $2 (15. Qxf7+ $18 Kc8 16. Qxe6+ {[%mdl 64] Double Attack} Kb8 17. Qd7) 15... f6 16. Qxf6 $2 (16. exf6 $17 Qxf6 17. Bxe4 Qxf4 18. Bxf4 dxe4 19. Kg2) 16... Kc8 $4 {[%mdl 8192]} (16... gxf6 $19 17. Be3 Qxe5) 17. Qxe6+ {[%mdl 64] [#] Double Attack} Kd8 18. Be3 Qb4 19. Bxe4 {White mates.} dxe4 20. Rd1+ Kc7 21. Qd7+ Kb8 22. e6 {Weighted Error Value: White=0.99/Black=1.29} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.19"]
[Round "1.10"]
[White "Ladan, Nicholas"]
[Black "Tello Chavez, Isaac Valent"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "1850"]
[BlackElo "2275"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,106,18,20,14,25,28,34,8,8,6,18,11,7,0,23,13,27,16,24,24,22,25,36,33,48,37,25,27,36,0,41,0,0,0,0,0,11,15,26,8,58,0,0,-4,15,12,10,-17,-17,-11,-13,-14,-13,-38,0,0,0,0,0,0,0,0,0,0,0,0,5,6,22,0,0,0,0,0,0,-110,-99,-199,-187,-185,-184,-267,-228,-284,-260,-334,-326,-329,-326,-352,-342,-385,-398,-476,-511,-608,-608,-600,-594]} 1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. g3 Bf5 5. Nc3 e6 6. Nh4 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4.} Be4 7. f3 Bg6 8. cxd5 {White is slightly better.} cxd5 {[#]} 9. Nxg6 $146 ({Predecessor:} 9. e3 Nc6 10. Qb3 Qb6 11. Qxb6 axb6 12. Nxg6 hxg6 13. Be2 Bd6 14. Kf2 Ke7 15. Bd2 {½-½ (65) Dubov,D (2703)-Bocharov,I (2563) Sochi 2018}) 9... hxg6 10. Be3 Nc6 {[%cal Bb8c6,Bc6a5,Ba5c4][%mdl 32]} 11. Bg2 Be7 12. O-O O-O 13. Bf2 Na5 14. e4 Rc8 15. Qe2 Nc4 16. Rac1 Re8 17. Rfd1 Qa5 18. Be1 {Threatens to win with b3.} Qd8 19. Bf2 Bb4 20. Na4 Qa5 21. b3 Na3 $1 22. Bf1 Nd7 23. Nb2 a6 24. Nd3 Bf8 25. Qe1 (25. exd5 $14 exd5 26. Qb2) 25... Qxe1 $11 26. Rxe1 {And now exd5 would win.} Nc2 27. Re2 Nb4 28. Rd1 Nxd3 29. Rxd3 Nf6 30. Be1 Rc1 31. Rc3 Rxc3 (31... Rxe1 $5 32. Rxe1 Bb4 $11) 32. Bxc3 Rc8 33. Bb2 Bb4 34. Kf2 Bc3 35. e5 Nd7 36. Ke3 Bxb2 37. Rxb2 {[%mdl 4096] Endgame KRB-KRN} g5 38. Bd3 f6 39. f4 gxf4+ 40. gxf4 Kf7 41. Rg2 Rh8 42. Kd2 {[#]} (42. Bg6+ $11 {keeps the balance.} Kf8 43. f5) 42... f5 $1 $17 43. Bf1 (43. b4 $17 {keeps fighting.}) 43... Nb8 $19 44. Rf2 Nc6 45. Ke3 (45. Kc3 {was necessary.}) 45... Rh4 46. Rd2 {[#]} g5 $1 {[%mdl 512]} 47. fxg5 Re4+ 48. Kf2 Rf4+ ({But not} 48... Nxd4 49. Rd3 $19) (48... Rxd4 49. Rxd4 Nxd4 50. Kg3 $11) 49. Kg2 Kg6 ({And not} 49... Rxd4 50. Rxd4 Nxd4 51. Kg3 $11) ({Don't take} 49... Nxd4 50. Rd3 $19) 50. Be2 Kxg5 51. Rd3 Rxd4 {Black is clearly winning.} 52. Rc3 Rd2 53. Kf1 Rxa2 {Weighted Error Value: White=0.24/Black=0.06} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.1"]
[White "Singh, Hersh"]
[Black "Sheng, Joshua"]
[Result "0-1"]
[ECO "E11"]
[WhiteElo "2112"]
[BlackElo "2474"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,120,0,4,30,9,33,25,24,13,19,14,14,0,0,0,0,-11,0,-48,-29,-80,-68,-72,-74,-109,-121,-272,-275,-353,-395,-392,-381,-422,-417,-593,-550,-548,-537,-534,-546,-526,-520,-651,-614,-708,-687,-693,-643,-636,-607,-833,-689,-676,-680,-671,-667,-802,-713,-764,-677,-645,-641,-777,-793,-858,-852,-828,0,-750,-748,-906,-900,-888,-896,-884,-848,-1027,-747,-878,-843,-1616,-1584,-1416,-1372,-1234,-1172,-1186,-1063,-29971,-12479,-29977,-29978,-29960,-29938,-6057,-5485,-29980,-29981,-29980,-29982,-29988,-29989,-29989,-29990,-29991,-29992]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O Nbd7 8. Qc2 c6 9. Rd1 a5 {E11: Bogo-Indian.} 10. Bf4 a4 11. Ne5 Qa5 {White has an edge.} 12. Nc3 Nxe5 13. dxe5 Nd7 $1 14. cxd5 exd5 15. e4 dxe4 $1 16. Bxe4 h6 {[#]} 17. Re1 $146 ({Predecessor:} 17. Bd2 Qa6 18. Bd3 b5 19. e6 fxe6 20. Bxh6 gxh6 21. Bxb5 cxb5 22. Qg6+ Kh8 23. Qxh6+ Kg8 24. Qg6+ Kh8 25. Qh6+ Kg8 26. Qg6+ Kh8 27. Qh6+ Kg8 {½-½ (27) Postny,E (2619)-Mareco,S (2606) Baku 2016}) 17... Nc5 18. Bg2 (18. a3 $11) 18... Rd8 19. Rad1 Bg4 20. Rd2 a3 21. b3 $2 {[#]} (21. Rb1 $17 {was worth a try.} axb2 22. Rxb2) 21... Ne6 $1 $19 {Strongly threatening ...Bb4.} 22. Rxd8+ Rxd8 23. h3 Bh5 24. Rc1 Nd4 25. Qe4 (25. Qb1 {was the only defense.} Bb4 26. Ne4 Ne2+ {[%mdl 64] Double Attack} 27. Kh2) 25... Bg6 26. Qe3 Nc2 27. Qf3 Rd3 {[%mdl 64] Double Attack} 28. Qg4 Qxc3 29. e6 Rd8 30. exf7+ Kxf7 31. Bf1 h5 32. Qe2 Bf6 33. h4 Nd4 34. Qc4+ Qxc4 35. Bxc4+ Kf8 36. Bf1 Be4 37. Kh2 {[#]} Nxb3 $1 38. Re1 (38. axb3 a2) 38... Nc5 39. Bc1 Bc3 40. Re3 Bb2 41. Re1 Bc3 42. Re3 $1 Bd2 43. Bxd2 Rxd2 {[%mdl 64] Double Attack} 44. Rxa3 Rxf2+ 45. Kg1 Rd2 46. Ra5 Nd3 47. Bxd3 Rxd3 48. Rxh5 Rxg3+ {[%mdl 4096] Endgame KRB-KR} 49. Kf2 Ra3 50. Rh8+ Kf7 51. Rb8 c5 52. Ke2 Ke6 53. Rg8 g6 54. Re8+ Kd5 55. Rd8+ Ke5 56. Re8+ Kd4 {Black mates.} 57. Rd8+ Bd5 58. Rd6 Rxa2+ 59. Kf1 c4 60. Rxg6 Ke3 {Black took control after the opening. Accuracy: White = 48%, Black = 95%.} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.2"]
[White "Stearman, Josiah"]
[Black "Lu, Ming"]
[Result "1/2-1/2"]
[ECO "D10"]
[WhiteElo "2391"]
[BlackElo "2154"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,84,0,6,0,0,0,0,0,10,-26,-11,-44,-41,-22,-29,-49,-39,-68,-45,-44,-39,-60,-62,-50,-41,-54,-72,-100,-123,-128,-134,-131,-138,-173,-133,-134,-135,-205,-207,-207,-167,-151,-170,-177,-77,-96,-87,-79,-85,-77,-58,-68,-66,-122,-28,-25,-26,-29,8,8,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bg5 Nc6 5. Nc3 f6 6. Bd2 {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3.} Bf5 {[#]} 7. e3 $146 ({Predecessor:} 7. e4 dxe4 8. d5 Ne5 9. Nh3 Bxh3 10. Qh5+ g6 11. Qxh3 f5 12. Bb5+ Nd7 13. Ne2 {½-½ (55) Hakobyan,A (2465)-Hovhannisyan,R (2595) Tsaghkadzor 2017}) 7... e6 8. Nf3 g5 9. h3 h5 10. Qb3 Qd7 11. Na4 Bd6 12. Bd3 Nge7 13. Rc1 Na5 14. Bxa5 Bxd3 {[%mdl 64] Overworked Piece} 15. Qxd3 {And now b3 would win.} Qxa4 {[%mdl 64] Double Attack} 16. Bc3 Kf7 17. Nd2 Qxa2 18. Qb5 Rab8 19. Ke2 {[#]} a6 $1 {[%cal Ra6b5]} 20. Qd3 {[#] Threatens to win with Ra1.} Qa4 $1 21. g4 hxg4 22. hxg4 {intending Rh7+.} Kg7 23. f4 (23. Ra1 $17 Qe8 24. Nf3) 23... gxf4 $19 24. e4 Qb5 25. Qxb5 axb5 26. e5 b4 (26... fxe5 $19 {has better winning chances.} 27. dxe5 Bc5) 27. exd6 $17 bxc3 28. bxc3 Rxh1 29. Rxh1 {[%mdl 4096] Endgame KRN-KRN} Nc6 30. Kf3 e5 31. Nb3 ({Better is} 31. dxe5 $15 fxe5 32. g5) 31... b6 (31... Rd8 $17 32. Nc5 Rxd6 33. Nxb7 Rd7) 32. dxe5 $11 fxe5 {Hoping for ...Rc8.} 33. Rd1 e4+ 34. Kxf4 {The position is equal.} Rf8+ 35. Kg3 Rf3+ {[%mdl 64] Double Attack} 36. Kg2 Rxc3 37. Nd4 Nxd4 38. Rxd4 {d7 is the strong threat.} Kf7 {White must now prevent ...Rc5.} 39. Rxd5 Rd3 40. Rxd3 exd3 41. Kf3 {g5 would kill now.} Ke6 (41... d2 $5 42. Ke2 $8 Ke6 $11) 42. Ke3 Kxd6 {White happily takes the draw.  Weighted Error Value: White=0.10/Black=0.13} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.3"]
[White "Oberoi, Shelev"]
[Black "Kumar, Nikhil"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "2133"]
[BlackElo "2328"]
[Annotator "ChessBase"]
[PlyCount "119"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. e4 {[%emt 0:00:17]} e5 {[%emt 0:03:10]} 2. Nf3 {[%emt 0:00:22]} Nc6 {[%emt 0:00:06]} 3. d4 {[%emt 0:00:08]} exd4 {[%emt 0:00:25]} 4. Nxd4 {[%emt 0:00:15]} Bc5 {[%emt 0:00:10]} 5. Nb3 {[%emt 0:00:35]} Bb6 {[%emt 0:00:04]} 6. Nc3 {[%emt 0:00:10]} Nf6 {[%emt 0:00:05]} 7. Qe2 {[%emt 0:00:28]} O-O {[%emt 0:00:08]} 8. Bg5 {[%emt 0:02:51]} h6 9. Bh4 {[%emt 0:01:26]} a5 {[%emt 0:00:10]} 10. a4 {[%emt 0:03:17]} Nd4 {[%emt 0:00:25]} 11. Qd3 {[%emt 0:02:54]} Nxb3 {[%emt 0:01:05]} 12. cxb3 {[%emt 0:00:20]} g5 {[%emt 0:11:57]} 13. Bg3 {[%emt 0:00:59]} d6 {[%emt 0:00:53]} 14. O-O-O {[%emt 0:03:03]} Be6 {[%emt 0:02:12]} 15. Qc2 {[%emt 0:00:58]} Qe7 {[%emt 0:02:12]} 16. Be2 {[%emt 0:02:16]} Rad8 {[%emt 0:01:07]} 17. h4 {[%emt 0:02:04]} g4 {[%emt 0:08:53]} 18. h5 {[%emt 0:06:50]} Nd7 {[%emt 0:02:16]} 19. Bh4 {[%emt 0:09:41]} f6 {[%emt 0:00:06]} 20. Nd5 {[%emt 0:01:53]} Qf7 {[%emt 0:07:29]} 21. Bc4 {[%emt 0:04:00]} c6 {[%emt 0:00:23]} 22. Nxb6 {[%emt 0:11:49]} Nxb6 {[%emt 0:00:37]} 23. Bxe6 {[%emt 0:00:20]} Qxe6 {[%emt 0:00:05]} 24. e5 {[%emt 0:00:08]} fxe5 {[%emt 0:04:47]} 25. Bxd8 {[%emt 0:00:12]} Rxd8 {[%emt 0:00:01]} 26. Qe2 {[%emt 0:12:29]} Rf8 {[%emt 0:12:04]} 27. Rd4 {[%emt 0:01:59]} Nd5 {[%emt 0:12:10]} 28. Rxg4+ {[%emt 0:01:54]} Kh7 {[%emt 0:00:23]} 29. Rg6 {[%emt 0:05:31]} Rf6 {[%emt 0:05:44]} 30. Rxf6 {[%emt 0:03:22]} Nxf6 {[%emt 0:00:07]} 31. Qd3+ {[%emt 0:00:46]} e4 {[%emt 0:00:27]} 32. Qg3 {[%emt 0:00:38]} Nd7 {[%emt 0:02:12]} 33. Qg6+ {[%emt 0:07:45]} Qxg6 {[%emt 0:00:11]} 34. hxg6+ {[%emt 0:00:03]} Kxg6 {[%emt 0:00:07]} 35. Kd2 {[%emt 0:00:26]} d5 {[%emt 0:00:40]} 36. Ke3 {[%emt 0:00:43]} Nc5 {[%emt 0:00:46]} 37. f3 {[%emt 0:03:17]} exf3 {[%emt 0:01:02]} 38. gxf3 {[%emt 0:00:19]} Nxb3 {[%emt 0:00:05]} 39. Rg1+ {[%emt 0:02:06]} Kf7 {[%emt 0:00:48]} 40. Rg4 {[%emt 0:01:45]} Nc5 {[%emt 0:00:32]} 41. b4 {[%emt 0:00:54]} Nxa4 {[%emt 0:01:23]} 42. bxa5 {[%emt 0:00:08]} Nb2 {[%emt 0:00:03]} 43. Rf4+ {[%emt 0:03:28]} Kg6 {[%emt 0:00:36]} 44. Rf8 {[%emt 0:02:01]} Nc4+ {[%emt 0:00:32]} 45. Kd4 {[%emt 0:00:11]} Nxa5 {[%emt 0:00:30]} 46. Ke5 {[%emt 0:00:34]} Kg7 {[%emt 0:04:04]} 47. Rc8 {[%emt 0:00:48]} c5 {[%emt 0:13:39]} 48. Rxc5 {[%emt 0:00:49]} Nc6+ {[%emt 0:00:12]} 49. Kxd5 {[%emt 0:00:15]} Kf6 {[%emt 0:00:03]} 50. Ke4 {[%emt 0:00:19]} Nd8 {[%emt 0:00:36]} 51. Rb5 {[%emt 0:00:15]} Nf7 {[%emt 0:03:31]} 52. Rb6+ {[%emt 0:00:10]} Kg7 {[%emt 0:00:06]} 53. Rxb7 {[%emt 0:00:36]} h5 {[%emt 0:00:06]} 54. Rb6 {[%emt 0:00:20]} h4 {[%emt 0:00:30]} 55. f4 {[%emt 0:00:36]} Nh6 {[%emt 0:00:23]} 56. Kf3 {[%emt 0:01:22]} Ng8 {[%emt 0:01:27]} 57. Kg4 {[%emt 0:00:47]} Nf6+ {[%emt 0:00:09]} 58. Kxh4 {[%emt 0:00:33]} Nd5 {[%emt 0:00:05]} 59. Rb7+ {[%emt 0:00:02]} Kg6 {[%emt 0:00:07]} 60. Kg4 {[%emt 0:00:11]} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.4"]
[White "Liang, Jason"]
[Black "Fishbein, Mitch"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "2317"]
[BlackElo "2132"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,87,38,45,33,43,24,35,41,103,82,75,64,79,74,168,157,267,246,243,178,223,205,277,200,213,137,139,161,164,138,388,368,1406,1367,1256,678,551,146,151,151,151,151,151,151,366,359,322,330,593,385,345,329,324,272,219,131,715,169,147,121,2666,2147,1343,1200,29975,5122,29979,29980,29982,29982,29982,29983,29981,29977]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Na6 8. Nd2 {Recently 8.Be3 got a lot of attention.} c6 9. a3 {E92: King's Indian: Classical: 6 Be2 e5: 7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7.} Ne8 10. h4 f5 11. h5 {[#] White is slightly better.} Nf6 $146 ({Black should play} 11... gxh5 $14 12. b4 (12. Bxh5 Nc5 $11) (12. Rxh5 Nf6 $11) 12... Nf6) ({Predecessor:} 11... cxd5 12. hxg6 hxg6 13. Nxd5 Nf6 14. b4 Nxd5 15. cxd5 Qf6 16. Bd3 Nc7 17. Qe2 Bd7 18. Bb2 f4 19. f3 Ne8 20. Rc1 Qd8 21. Qf2 Nf6 22. Nc4 Be8 {½-½ (22) Narciso Dublan,M (2489)-Perez Mitjans,O (2407) Platja d'Aro 2019}) 12. h6 Bh8 13. exf5 gxf5 14. g4 Nc5 (14... cxd5 $16 {was called for.} 15. g5 Nd7) 15. b4 $18 Nxg4 (15... Nce4 $16 {might work better.} 16. Ncxe4 fxe4) 16. bxc5 e4 17. Ndb1 Be5 18. Ra2 Qa5 19. Bxg4 fxg4 20. Rh5 {Hoping for Rc2.} Bxc3+ 21. Nxc3 Qxc3+ 22. Bd2 $1 Qf6 $2 (22... Qf3 $16 23. Rg5+ Kf7) 23. Rg5+ $1 Kh8 $2 (23... Kf7 24. Rg7+ Ke8) 24. Bc1 {White wants to mate with Bb2!} Re8 {[#]} 25. Bb2 $1 {[%cal Rb2f6][%mdl 512]} Re5 26. Rxe5 $2 (26. Qc1 $18 {Threatens to win with cxd6.} e3 27. Bxe5 dxe5 28. Qxe3) 26... dxe5 $16 {[#]} 27. dxc6 $1 {Strongly threatening Bxe5.} Kg8 28. cxb7 $40 {[%mdl 128] White has strong attack.} Bxb7 29. Qxg4+ Qg6 $2 (29... Kf8 $16 30. Bc1 (30. Qd7 Bc6 $16) 30... Rd8) 30. Qxg6+ $18 hxg6 31. Bxe5 {[%mdl 4096] Endgame KRB-KRB} Rd8 $2 (31... Kh7 32. Rd2 Kxh6) 32. Rb2 Bc6 33. Rb8 Rxb8 34. Bxb8 {KB-KB} g5 35. Be5 ({Much less strong is} 35. Bxa7 $6 e3) (35. Ke2 $18) 35... e3 $2 {[%mdl 8192]} (35... Kh7 $16) 36. fxe3 $2 (36. f4 gxf4 37. Bxf4) 36... Kh7 37. Bg7 g4 $2 {[%mdl 8192]} (37... Bb7 $16 38. Ke2 Bc6) 38. Kf2 Kg6 39. Kg3 Bf3 {[#]} 40. Kf4 (40. c6 $142 $1 Be4 (40... Bxc6 41. Kxg4) 41. Kf4 g3 42. Kxe4 g2 43. c7 g1=Q 44. c8=Q Qh1+ 45. Kd4 Qa1+ 46. Kd5 Qd1+ 47. Bd4) 40... Kh7 {[#]} 41. c6 $1 {White mates.} Bxc6 42. Kxg4 Kg6 43. Kf4 Kf7 44. Ke5 {Weighted Error Value: White=0.71/Black=0.96} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.5"]
[White "Vivekananthan, Anish"]
[Black "Kumar, Naman"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2305"]
[BlackElo "2115"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,73,0,0,7,-2,20,0,0,0,0,-19,4,1,21,18,30,35,37,0,21,4,15,14,23,15,12,12,24,6,13,0,38,35,47,46,104,102,93,108,97,92,145,131,135,106,137,155,158,156,168,200,729,725]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 d6 6. Bg5 h6 7. Bxf6 Qxf6 8. Nd5 Qd8 9. c3 a6 10. d4 exd4 11. cxd4 Ba7 12. h3 O-O {C50: Hungarian Defence and Giuoco Pianissimo.} 13. O-O Be6 14. a3 {[#]} Ne7 $146 {The position is equal.} ({Predecessor:} 14... Rc8 15. Qd3 Ne7 16. Nf4 Bxc4 17. Qxc4 c6 18. Qb3 Qb6 19. Qxb6 {½-½ (19) Fossan,E (2356)-Sagafos,M (2409) Oslo 2015}) 15. Nxe7+ Qxe7 16. Bd3 c6 17. Re1 Qd7 18. Bc2 d5 19. e5 Bf5 20. b4 Bb6 21. Rb1 {[%cal Ba1b1,Bb1b2,Bb2c2][%mdl 32]} Bxc2 22. Qxc2 a5 23. Re3 axb4 24. axb4 Rfc8 25. Kh2 Ra7 26. Rb2 Rca8 {[#]} 27. b5 $1 {[%mdl 512] aiming for bxc6.} cxb5 28. Reb3 Ba5 ({Black should try} 28... Ra5 $14) 29. Rxb5 $16 b6 30. Qb3 Rd8 31. Rc2 Raa8 (31... Qf5 $142) 32. Nh4 g6 33. g4 Kh7 {[#]} 34. Ng2 $1 Rac8 35. Rxc8 Rxc8 36. Rxd5 Qb7 $2 {[#]} (36... Qe8 37. Rd6 b5) 37. Rxa5 $1 {[%mdl 576] Pin.  Weighted Error Value: White=0.08/Black=0.16} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.6"]
[White "Wu, Derek"]
[Black "Chasin, Nico"]
[Result "1-0"]
[ECO "D93"]
[WhiteElo "2106"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,74,50,46,45,44,41,43,34,43,52,60,58,85,22,266,250,250,250,262,248,316,313,312,295,339,339,361,387,462,388,409,308,812,811,1283,851,816,779,2073,1737,1439,917,843,806,884,907,953,943,1509,1686,5173,5173,1593,1582,29972,29966,29984]} 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 g6 5. Bf4 Bg7 6. e3 O-O 7. Be2 Nbd7 8. O-O dxc4 9. Bxc4 Nb6 10. Bb3 Nbd5 11. Be5 {D93: Grünfeld: 4 Nf3 Bg7 5 Bf4 0-0 6 e3.} Bf5 12. Qe2 {[#]} Nxc3 $146 ({Predecessor:} 12... Qd7 13. Rac1 Rac8 14. Nd2 Bh6 15. Rfe1 Bg4 16. Qd3 Bf5 17. e4 Nb4 18. Qe2 Nxe4 19. Ncxe4 Bxe4 20. Nxe4 Bxc1 21. Rxc1 {1-0 (51) Ivan,Z (2220)-Kinez,I (2075) Harkany 1998}) 13. bxc3 {White is slightly better.} Ne4 14. Qb2 Qa5 15. Rac1 Rad8 16. Bc2 (16. Rfe1 $16) 16... b5 $2 {This costs Black the game.} (16... f6 $11 {and Black stays safe.} 17. Bg3 Rd7) 17. Bxg7 Kxg7 {[#]} 18. g4 $1 {[%mdl 512]} Nxc3 (18... Bxg4 19. Bxe4) 19. gxf5 ({Resist} 19. Bxf5 $6 Na4 $18) 19... Ne2+ 20. Kh1 Nxc1 21. Rxc1 ({Not} 21. Qxc1 Qxa2 22. Be4 Rd6 $16) 21... Rd6 22. Be4 Rf6 23. Ne5 (23. Rxc6 gxf5 24. Bd5 Rxc6 $16) 23... gxf5 24. Rg1+ Kh8 25. Bxc6 {And now d5 would win.} b4 $2 (25... Rg8 26. Rc1 (26. Qxb5 Rxg1+ 27. Kxg1 Qe1+ 28. Qf1 Qd2 $16) 26... b4) 26. d5 $18 b3 27. axb3 Qb4 28. f3 Qc5 {[#]} 29. Nd7 $1 {[%mdl 64] Pin} Qxe3 30. Nxf8 Qxf3+ 31. Qg2 Qxg2+ 32. Rxg2 Rd6 33. Nd7 h6 34. Ne5 Rf6 35. Be8 f4 36. Bxf7 h5 37. Bxh5 Rf5 {Weighted Error Value: White=0.26/Black=0.89} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.7"]
[White "Sandoval Mercado, Carlos"]
[Black "Orellana, Juan"]
[Result "1-0"]
[ECO "D20"]
[WhiteElo "2298"]
[BlackElo "2104"]
[Annotator "ChessBase"]
[PlyCount "139"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. d4 {[%emt 0:00:00]} d5 {[%emt 0:02:37]} 2. c4 {[%emt 0:00:19]} dxc4 {[%emt 0:00:07]} 3. e4 {[%emt 0:00:19]} e5 {[%emt 0:00:22]} 4. Nf3 {[%emt 0:00:15]} exd4 {[%emt 0:00:10]} 5. Bxc4 {[%emt 0:01:42]} Nc6 {[%emt 0:00:06]} 6. O-O {[%emt 0:00:16]} Be6 {[%emt 0:00:06]} 7. Bxe6 {[%emt 0:00:45]} fxe6 {[%emt 0:00:02]} 8. Qb3 {[%emt 0:00:09]} Qd7 {[%emt 0:00:12]} 9. Qxb7 {[%emt 0:00:04]} Rb8 {[%emt 0:00:02]} 10. Qa6 {[%emt 0:00:53]} Bd6 {[%emt 0:01:01]} 11. a3 {[%emt 0:09:46]} Nf6 {[%emt 0:03:24]} 12. Nbd2 {[%emt 0:00:02]} O-O {[%emt 0:00:14]} 13. Qd3 {[%emt 0:05:15]} Kh8 {[%emt 0:10:17]} 14. g3 {[%emt 0:18:10]} e5 {[%emt 0:02:43]} 15. Kg2 {[%emt 0:00:02]} Ne7 {[%emt 0:06:26]} 16. Nc4 {[%emt 0:07:44]} Ng6 {[%emt 0:00:40]} 17. h3 {[%emt 0:00:03]} Qb5 {[%emt 0:07:23]} 18. Re1 {[%emt 0:08:19]} Nd7 {[%emt 0:23:35]} 19. b4 {[%emt 0:16:38]} Nb6 {[%emt 0:15:33]} 20. Ncxe5 {[%emt 0:29:19]} Qe8 {[%emt 0:18:24]} 21. Nxg6+ {[%emt 0:00:00]} Qxg6 {[%emt 0:00:03]} 22. Bb2 {[%emt 0:00:00]} c5 {[%emt 0:01:25]} 23. bxc5 {[%emt 0:00:00]} Bxc5 {[%emt 0:00:09]} 24. Rac1 {[%emt 0:00:00]} Na4 {[%emt 0:03:21]} 25. Bxd4 {[%emt 0:00:00]} Bxd4 {[%emt 0:00:12]} 26. Qxd4 {[%emt 0:00:00]} Nb6 {[%emt 0:00:28]} 27. Rc7 {[%emt 0:00:00]} Rbd8 {[%emt 0:01:06]} 28. Qc3 {[%emt 0:00:00]} Nc8 {[%emt 0:01:52]} 29. Re2 {[%emt 0:03:07]} Nd6 {[%emt 0:00:19]} 30. a4 {[%emt 0:00:27]} Nc8 {[%emt 0:00:33]} 31. Nh4 {[%emt 0:00:48]} Qf6 {[%emt 0:00:19]} 32. e5 {[%emt 0:00:19]} Qe6 {[%emt 0:00:13]} 33. Nf3 {[%emt 0:01:10]} h6 {[%emt 0:00:43]} 34. a5 {[%emt 0:00:08]} Rde8 {[%emt 0:00:34]} 35. Qc6 {[%emt 0:00:48]} Qxc6 {[%emt 0:01:21]} 36. Rxc6 {[%emt 0:00:01]} Ne7 {[%emt 0:00:15]} 37. Rc7 {[%emt 0:00:18]} Nd5 {[%emt 0:00:01]} 38. Rxa7 {[%emt 0:00:09]} Ra8 {[%emt 0:00:01]} 39. Rxa8 {[%emt 0:00:45]} Rxa8 {[%emt 0:00:01]} 40. e6 {[%emt 0:00:54]} Ne7 {[%emt 0:00:01]} 41. Ra2 {[%emt 0:01:04]} Nc6 {[%emt 0:00:03]} 42. a6 {[%emt 0:00:13]} Kg8 {[%emt 0:00:02]} 43. Nh4 {[%emt 0:00:32]} Nb4 {[%emt 0:00:50]} 44. Ra4 {[%emt 0:00:07]} Nxa6 {[%emt 0:00:48]} 45. Ng6 {[%emt 0:00:37]} Nc7 {[%emt 0:00:22]} 46. Rxa8+ {[%emt 0:00:08]} Nxa8 {[%emt 0:00:01]} 47. f4 {[%emt 0:00:10]} Nc7 {[%emt 0:00:08]} 48. f5 {[%emt 0:00:06]} h5 {[%emt 0:00:23]} 49. Kf3 {[%emt 0:00:30]} Nd5 {[%emt 0:00:18]} 50. Ke4 {[%emt 0:00:21]} Nc7 {[%emt 0:00:15]} 51. Ke5 {[%emt 0:00:16]} Nb5 {[%emt 0:01:45]} 52. Kd5 {[%emt 0:00:07]} Nc7+ {[%emt 0:00:14]} 53. Kc6 {[%emt 0:00:08]} Ne8 {[%emt 0:00:31]} 54. Kd7 {[%emt 0:00:04]} Nf6+ {[%emt 0:00:10]} 55. Kd8 {[%emt 0:00:03]} Kh7 {[%emt 0:01:12]} 56. e7 {[%emt 0:00:28]} Kh6 {[%emt 0:00:06]} 57. e8=Q {[%emt 0:00:43]} Nxe8 {[%emt 0:00:07]} 58. Kxe8 {[%emt 0:00:02]} Kg5 {[%emt 0:00:03]} 59. Nh4 {[%emt 0:00:06]} Kf6 {[%emt 0:00:29]} 60. Kf8 {[%emt 0:00:28]} Kg5 {[%emt 0:00:07]} 61. Ke7 {[%emt 0:00:03]} Kh6 {[%emt 0:00:31]} 62. f6 {[%emt 0:00:06]} gxf6 {[%emt 0:00:04]} 63. Kxf6 {[%emt 0:00:05]} Kh7 {[%emt 0:00:12]} 64. Kg5 {[%emt 0:00:02]} Kg7 {[%emt 0:00:05]} 65. Kxh5 {[%emt 0:00:03]} Kh7 {[%emt 0:00:08]} 66. g4 {[%emt 0:00:03]} Kg7 {[%emt 0:00:05]} 67. g5 {[%emt 0:00:03]} Kh7 {[%emt 0:00:04]} 68. g6+ {[%emt 0:00:04]} Kh8 {[%emt 0:00:06]} 69. Kh6 {[%emt 0:00:04]} Kg8 {[%emt 0:00:25]} 70. g7 {[%emt 0:00:03]} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.8"]
[White "Hamley, Ryan"]
[Black "Asaria, Danial"]
[Result "0-1"]
[ECO "D23"]
[WhiteElo "2089"]
[BlackElo "2284"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,64,1,-1,-30,-12,-37,-31,-32,-36,-51,-51,-45,-56,-45,-30,-20,-21,-20,-16,-9,-14,-20,-26,-32,-14,-54,0,-61,-69,-51,-44,-59,-32,-26,-22,-40,-37,-78,-83,-72,-48,-383,-286,-604,-389,-641,-265,-282,-278,-292,-295,-348,-330,-456,-444,-810,-443]} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 dxc4 5. Qa4+ Nbd7 6. Qxc4 {D23: Queen's Gambit Accepted: 3 Nf3 Nf6 sidelines.} a6 7. a4 c5 8. dxc5 {Black is slightly better.} Bxc5 9. e3 {[#]} O-O $146 ({Predecessor:} 9... Qe7 10. Bd3 O-O 11. O-O Re8 12. Rb1 e5 13. e4 Nb6 14. Qb3 Be6 15. Qc2 Bd6 {½-½ (36) Reinartz,G (2240)-Labahn,W (2265) Germany 1994}) 10. a5 b5 11. axb6 $1 Bb7 12. Be2 Rc8 13. Qb3 Bxb6 14. O-O Qc7 15. Bd2 Nc5 16. Qb4 Rfd8 17. Rad1 e5 (17... Qc6 $15) 18. Bc1 ({White should try} 18. Na4 $11 Nxa4 19. Qxa4) 18... e4 $15 {White must now prevent ...Ng4.} 19. Nd4 Ba7 20. Qa3 Bb8 {[%csl Gb8][%cal Rc7h2]} 21. g3 h5 $36 {[%mdl 2048] Black has some pressure.} 22. Na4 {[#]} Nd3 $1 {[%mdl 512]} 23. Bxd3 exd3 24. Qxd3 Ng4 {Hoping for ...Ne5.} 25. Qf5 $2 {[%mdl 8192] [#] This costs White the game.} ({Only move:} 25. Qe2 $1 $15) 25... Rd5 $1 $19 {[%cal Rd5f5]} (25... g6 $2 26. Qg5 $19) 26. Qf4 $2 (26. Qb1 Ne5 27. f4 Rxd4 {[%mdl 64] Remove Defender} 28. Rxd4) 26... Qa5 27. Nb3 $2 (27. Qe4 Qxa4 28. Qe7) 27... Bxf4 (27... Qb5 $142 28. Nc3 Qxb3) 28. Nxa5 Rxa5 29. Nb6 Rc6 30. b4 Rb5 ({Not} 30... Rxb6 $2 31. bxa5 Bxg3 32. fxg3 $18) 31. Nd5 {And now Ne7+ would win.} Bd6 32. Bb2 (32. e4 $142) 32... Bxb4 {Weighted Error Value: White=0.75/Black=0.26} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.9"]
[White "Tello Chavez, Isaac Valent"]
[Black "Adury, Anant"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2275"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,55,37,23,46,43,86,39,66,25,27,8,97,85,118,76,111,120,111,84,272,268,259,258,254,260,289,211,212,95,554,247,237,245,564,543,538,556,541,536,496,495]} 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. e4 d6 6. Nge2 c5 7. d3 Nc6 8. O-O Ne8 9. Be3 e5 {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7.} 10. f4 f5 11. exf5 Bxf5 {[#] White is slightly better.} 12. Qd2 $146 ({Predecessor:} 12. fxe5 Nxe5 13. Bxb7 Rb8 14. Bd5+ Kh8 15. Qd2 Nf6 16. Bg5 Qb6 17. b3 Qa5 18. Rad1 Bxd3 {½-½ (19) Senk,C-Lenhard,M Landau 1996}) 12... Nc7 13. h3 Rb8 (13... h5 $11 {keeps the balance.}) 14. g4 $16 Be6 15. Rae1 Nd4 16. fxe5 Bxe5 17. Ne4 Qd7 $2 {[#]} (17... Nxe2+ $16 18. Qxe2 Qe7) 18. Nxd4 $18 cxd4 19. Bf4 Bxf4 20. Rxf4 {Threatens to win with Nf6+.} Kg7 21. Ref1 {And now Qf2 would win.} d5 22. cxd5 (22. Nf6 $18 Qd6 23. Qf2 dxc4 24. Rxd4 (24. Qh4 h6 $16)) 22... Bxd5 $2 {[%mdl 8192]} (22... Nxd5 $16 {is tougher.} 23. Nc5 Qd6 24. Rxf8 Rxf8 25. Rxf8 Kxf8 26. Nxe6+ (26. Nxb7 Qc7 $11) 26... Qxe6) 23. Qf2 (23. Qb4 $142 {[%cal Rf4f8]} Rxf4 24. Qxd4+ {[%mdl 64] Double Attack} (24. Rxf4 Bxe4 25. Rxe4 Ne6 $16) 24... Kg8 25. Rxf4) 23... Ne6 24. Nf6 {[%mdl 64] [#] Discovered Attack} Qd8 $2 (24... Nxf4 {is a better chance.} 25. Nxd7 Nxh3+ 26. Bxh3 Rxf2 27. Rxf2 (27. Kxf2 Rc8 $18) 27... Rc8) 25. Nxd5 {White is clearly winning.} Nxf4 26. Qxd4+ {[%mdl 64] Double Attack} Qf6 27. Qxf6+ Rxf6 28. Nxf6 {Weighted Error Value: White=0.42/Black=0.92} ({Less strong is} 28. Nxf4 Rbf8 $18) ({Not} 28. Rxf4 Rxf4 29. Nxf4 Rc8 $18) 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "2.10"]
[White "Truelson, Joseph"]
[Black "Tsay, Vincent"]
[Result "1/2-1/2"]
[ECO "E06"]
[WhiteElo "2046"]
[BlackElo "2266"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,69,32,7,0,0,0,5,44,48,43,38,72,71,61,67,72,49,78,76,77,71,80,31,29,25,21,30,94,96,88,68,71,0,0,0,0,0,0,0,0,0,0,0,0,-25,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 c6 5. g3 Be7 6. Bg2 O-O 7. O-O b6 8. Bf4 Ba6 {E06: Closed Catalan: Early deviations.} 9. cxd5 cxd5 10. Rc1 Nc6 11. Nxd5 Nxd5 12. Rxc6 {[#]} Bb7 $146 ({Predecessor:} 12... Nxf4 13. gxf4 Bb5 14. Rc3 Bd6 15. Ne5 Rc8 16. Qc2 Rxc3 17. bxc3 Qc7 {1-0 (59) Khotenashvili,B (2440)-Arabidze,M (2315) Anaklia 2011}) 13. Rc1 Nxf4 14. gxf4 Be4 15. Ne1 Qd5 16. Bxe4 Qxe4 17. e3 Rac8 18. Qd3 Qd5 19. Rxc8 Rxc8 20. a3 f5 (20... Bd6 $11 {remains equal.}) 21. Qa6 $16 Rc7 22. Nd3 g5 23. Rc1 ({White should try} 23. fxg5 $16 {Black must now prevent Rc1.} Qe4 24. Ne5) 23... Rxc1+ $11 24. Nxc1 {Hoping for Qc8+.} gxf4 $1 25. Qc8+ Kf7 {[#] Threatens to win with ...fxe3.} 26. Nd3 $1 {[%cal Rd3f4]} fxe3 27. Ne5+ Kg7 28. fxe3 Qb3 29. Qc1 Bg5 30. Kf2 $1 {The position is equal.} Bh4+ 31. Ke2 Be7 32. Nd3 Bd6 33. h3 Qd5 34. Qg1+ Kf7 35. Qg5 {Weighted Error Value: White=0.07/Black=0.09} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.1"]
[White "Sheng, Joshua"]
[Black "Paul, Justin"]
[Result "0-1"]
[ECO "E69"]
[WhiteElo "2474"]
[BlackElo "2267"]
[Annotator "TA"]
[PlyCount "124"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,124,20,24,86,0,0,19,45,-10,6,0,31,25,31,29,25,19,32,12,29,20,47,29,54,56,77,33,31,23,108,59,59,62,79,49,66,43,62,57,123,126,221,167,230,112,110,94,90,99,78,111,106,109,149,0,0,0,0,0,-10,-29,105,-332,-297,-494,-504,-482,-464,-529,-532,-518,-508,-739,-739,-727,-466,-418,-362,-418,-418,-596,-594,-594,-571,-993,-972,-1070,-1063,-1056,-845,-1020,-993,-4132,-4132,-2093,-1893,-4132,-1103,-918,-777,-760,-734,-700,-680]} 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 d6 5. d4 O-O 6. Nf3 Nbd7 7. O-O c6 8. e4 e5 9. h3 Qa5 10. Re1 exd4 11. Nxd4 Ne5 12. Bf1 Qb6 {E69: King's Indian: Fianchetto: 6...Nbd7 7 0-0 e5 8 e4 c6 9 h3.} (12... Be6 $11) 13. Nc2 {13.Kg2 is becoming the main line.} (13. Be3 $1 $16) 13... Be6 $11 14. b3 {[#]} Rfe8 $146 {The position is equal.} ({Predecessor:} 14... Rad8 15. Be3 Qa5 16. Bd2 Ne8 17. Rc1 c5 18. Ne3 Qc7 19. f4 Nc6 20. f5 Bd7 {1-0 (123) Chakravarthi,R (2431)-Tugstumur,Y (2295) Novi Sad 2019}) 15. Na4 (15. Bd2 $14) 15... Qa5 (15... Qc7 {keeps more tension.} 16. Nd4 a6 17. Nc3 b5 18. f4 Qb6) 16. Nd4 c5 17. Bd2 Qc7 18. Nb5 Qc6 19. Nbc3 Qd7 20. Kh2 Nc6 21. Bg2 Rad8 22. Be3 h5 23. Rc1 {[%cal Ba1c1,Bc1c2,Bc2d2][%mdl 32]} Qc8 24. Rc2 Qb8 25. Bg5 Rd7 (25... Nd4 $11 {keeps the balance.}) 26. Rd2 Nh7 27. Bf4 {[%cal Rd2d6]} Ne5 28. Kg1 b6 29. Be3 Nc6 30. f4 {Black must now prevent f5!} Rdd8 (30... Nd4 $14) 31. Nb5 $16 {[%cal Rb5d6]} h4 (31... Bf8 $16 {was worth a try.}) 32. g4 (32. Rxd6 a6 $15) 32... Rf8 (32... Bf8 $142 33. e5 Nd4) 33. e5 (33. Rxd6 a6 $17) (33. Nxd6 $18 {Strongly threatening e5.} Nd4 34. e5) 33... dxe5 34. Bxc6 exf4 35. Bf2 (35. Bxf4 Qxf4 36. Rxd8 Qg3+ 37. Kf1 Qf4+ 38. Kg2 (38. Bf3 Ng5 $14 {[%mdl 64] Double Attack}) 38... Qg3+ 39. Kf1 Qf4+ 40. Bf3 Ng5) 35... Rxd2 36. Qxd2 Rd8 37. Qe2 Ng5 {...f3 is the strong threat.} 38. Kg2 (38. Bxh4 $16 Nxh3+ 39. Kh1) 38... Rd5 $11 39. Bxd5 Bxd5+ 40. Kf1 Bg2+ $1 41. Kg1 Be4 {[#]} (41... Bc6 $11 {remains equal.} 42. Qe7 Nf3+ 43. Kf1 Nxe1 44. Bxe1 (44. Kxe1 Bxb5 45. cxb5 Qa8 $11) 44... Bxb5 45. cxb5 Qa8) 42. Qxe4 $4 {[%mdl 8192]} (42. Bxh4 f3 $19) (42. Nac3 $1 $16 {[%cal Rc3e4]} Nf3+ 43. Kh1) 42... Nxe4 $19 43. Rxe4 {White hopes to continue with Nbc3.} a6 44. Nbc3 {intending Nd5.} b5 45. cxb5 axb5 46. Nxb5 Qxb5 47. Rxf4 Qd3 48. Kg2 Qd5+ 49. Rf3 Bd4 50. Nb6 Qe4 51. Bxh4 (51. Bxd4 {was called for.} cxd4 52. Nc4) 51... Qe2+ {Black is clearly winning.} 52. Bf2 Qxa2 53. Nd7 Kg7 54. g5 Bxf2 55. Rxf2 Qxb3 {[%mdl 4096] Endgame KQ-KRN} 56. Nf6 Qe3 57. h4 c4 58. Ra2 Qc5 59. Re2 Qc6+ (59... c3 $142 60. Re8 Qc6+ 61. Kg3 {[#]} Qxe8 $1 {[%mdl 576] Promotion} 62. Nxe8+ Kf8) 60. Kf2 Qh1 61. Kg3 Qg1+ 62. Kf3 Qf1+ {Quite a comeback for Black.  Weighted Error Value: White=0.72/Black=0.37} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.2"]
[White "Quiroga Jaquez, Angel Ivan"]
[Black "Liang, Jason"]
[Result "0-1"]
[ECO "E14"]
[WhiteElo "2178"]
[BlackElo "2317"]
[Annotator "TA"]
[PlyCount "140"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,140,30,30,37,10,27,19,14,0,0,-8,-8,-1,-7,-7,0,0,14,14,21,21,36,22,24,20,31,30,33,14,15,12,20,15,25,23,20,0,28,22,33,0,0,0,0,0,12,4,48,0,0,0,0,-126,-121,-133,-116,-128,-123,-129,-129,-116,-116,-116,-109,-112,-110,-129,-118,-118,-116,-122,-109,-110,-110,-136,-122,-116,0,-134,-129,-183,-177,-166,-159,-179,-159,-190,-155,-247,-240,-543,-503,-738,-693,-638,-572,-772,-705,-795,-817,-799,-798,-742,-715,-598,0,-495,-487,-543,-521,-786,-786,-673,-657,-837,-835,-792,-789,-997,-972,-868,-847,-2244,-2147,-1420,-1180]} 1. Nf3 d5 2. b3 e6 3. Bb2 Nf6 4. e3 b6 5. d4 Bb7 6. Bd3 Nbd7 7. O-O Be7 8. c4 O-O 9. Nc3 a6 {E14: Queen's Indian: Classical Variation (4 e3).} 10. Qe2 dxc4 11. bxc4 c5 {The position is equal.} 12. Rfd1 Qc7 13. Ne5 cxd4 14. exd4 {[#]} Nxe5 $146 ({Predecessor:} 14... Rad8 15. f4 Rfe8 16. Rac1 Bf8 17. Qf2 g6 18. Qh4 Nxe5 19. fxe5 Rxd4 20. Qxf6 Bh6 21. Nd5 Qc5 22. Qf2 {1-0 (22) Pedersen,E (2395)-Hansen,C (2505) Naestved 1985}) 15. dxe5 Qc6 {[%csl Gb7][%cal Rc6g2] [#]} 16. f3 Nh5 17. Be4 Qc7 18. g3 Rfd8 19. Bxb7 Qxb7 20. Ne4 Qc6 21. Kg2 Rac8 22. Rac1 Rxd1 23. Qxd1 Rd8 24. Qb3 f5 25. exf6 Nxf6 26. Qc3 Qd7 27. Re1 h6 28. Qe5 Qc6 29. Rc1 Rd3 30. Rc3 Rd1 31. Rc2 Kh7 32. Rd2 Rxd2+ $1 33. Nxd2 Qa4 34. a3 ({Wrong is} 34. Qxe6 $2 Qc2 $19) (34. Qe3 $11) 34... Qc2 $17 35. Qd4 Bc5 36. Qc3 {[#]} Qxc3 $1 37. Bxc3 Bxa3 {[%mdl 4096] Endgame KBN-KBN} 38. Kf2 Kg6 39. Ke2 Kf7 40. Kd3 Nd7 41. f4 Be7 42. Bd4 Bf6 43. Be3 Bb2 44. Kc2 Ba3 45. Ne4 Ke7 46. Bd4 Kf7 ({Black should try} 46... Kf8 $17) 47. Kb3 (47. Be3 $1 $11) 47... Bc5 {White is now going downhill.} 48. Kc3 (48. Nxc5 $17 bxc5 49. Bc3) 48... Bxd4+ $19 49. Kxd4 {KN-KN} Ke7 50. h3 Nf6 51. Nc3 Kd6 52. g4 (52. Na4 $17 {keeps fighting.}) 52... g5 53. fxg5 $2 (53. f5) 53... hxg5 54. Na4 e5+ 55. Kd3 Kc6 56. Nc3 a5 57. Nb5 Kc5 58. Nc7 Kd6 59. Nb5+ Kc6 60. Nc3 Kd6 $2 (60... Kc5 $19 {White must now prevent ...e4+!} 61. Nd1 a4) 61. Na4 $2 {[%mdl 8192] Cut Off at move 61} (61. Nb5+ $1 $11 {and White is okay.} Kc5 62. Nc7) 61... Nd7 {Strongly threatening ...Nc5+.Black is clearly winning.} 62. Kc3 Kc6 63. Nb2 Nc5 64. Nd1 Kd6 65. Ne3 Ne4+ 66. Kb3 Kc5 67. Nf5 Nd2+ 68. Kc3 Nxc4 69. h4 gxh4 70. g5 Nd6 {Weighted Error Value: White=0.35/Black=0.15} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.3"]
[White "Venkat, Raghav"]
[Black "Vivekananthan, Anish"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2167"]
[BlackElo "2305"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,73,-16,-14,-16,-6,-7,-6,-6,-15,-17,-2,-5,0,-42,-33,-36,-18,-26,-27,-42,7,10,0,0,9,17,55,67,60,0,0,0,0,-6,0,-6,-18,-8,-10,-10,0,-20,18,-60,-65,-64,-71,-56,-72,-81,-1,-81,-22,-38,-29,-169,-161,-532,0,-26,-22,-37]} 1. Nf3 d5 2. d4 Nf6 3. Bf4 c5 4. e3 Nc6 5. c3 Qb6 6. Qc1 Bf5 7. Nbd2 e6 8. Be2 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} h6 9. h3 Be7 10. O-O O-O 11. dxc5 Bxc5 12. b4 Be7 13. a3 {[#]} a5 $146 ({Predecessor:} 13... Rfc8 14. c4 dxc4 15. Nxc4 Qd8 16. Rd1 Nd5 17. Qb2 b5 18. g4 Bh7 19. Ncd2 Nxf4 20. exf4 {0-1 (45) Bayramov,Z (2333)-Stachowiak,K (2448) Lisbon 2020}) 14. b5 Nb8 15. Be5 Nbd7 16. Bd4 $1 {[%cal Rd4b6]} Qd8 (16... Qd6 $5 {[%cal Re6e5]} 17. c4 e5 $11) 17. c4 Rc8 18. Qb2 Nb6 19. Rac1 Nxc4 20. Nxc4 dxc4 21. Bxc4 (21. Ne5 $14) 21... Qd6 $11 22. a4 Qa3 23. Qb3 Ne4 24. Rfd1 Bb4 25. Qxa3 Bxa3 26. Ra1 Bb4 $36 {[%mdl 2048] Black fights for an advantage.} 27. Bd3 f6 28. Rac1 (28. Bb6 $11) 28... e5 $15 29. Bb6 Bh7 $1 30. Bxe4 Bxe4 31. Bc7 b6 ({Better is} 31... Bf5 $17) 32. Rc4 (32. Bxb6 $11 {remains equal.} Bc2 {[%mdl 64] Double Attack} 33. Rd8) 32... Bb7 ({Black should try} 32... Kh7 $17) 33. Rcc1 $11 Ba3 34. Rc3 {[#]} (34. Ra1 $1 $11) 34... Bc5 $1 $19 35. Rcc1 $2 (35. Rxc5 {was the crucial defense.} bxc5 36. b6) 35... Ba3 $2 (35... Rxc7 $19 36. Nh4 Bc8) 36. Ra1 Bb2 37. Rab1 {Weighted Error Value: White=0.33/Black=0.24} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.4"]
[White "Chen, Ryo"]
[Black "Sandoval Mercado, Carlos"]
[Result "0-1"]
[ECO "B92"]
[WhiteElo "2165"]
[BlackElo "2298"]
[Annotator "RC"]
[PlyCount "102"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. e4 {[%emt 0:04:24]} c5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:09]} d6 {[%emt 0:00:01]} 3. d4 {[%emt 0:00:14]} cxd4 {[%emt 0:00:18]} 4. Nxd4 {[%emt 0:00:07]} Nf6 {[%emt 0:00:40]} 5. Nc3 {[%emt 0:00:07]} a6 {[%emt 0:00:05]} 6. Be2 {[%emt 0:00:05]} e5 {[%emt 0:02:07]} 7. Nb3 {[%emt 0:00:07]} Be7 {[%emt 0:00:05]} 8. O-O {[%emt 0:00:16]} O-O {[%emt 0:00:06]} 9. Kh1 {[%emt 0:00:03]} Nbd7 {[%emt 0:00:33]} 10. a4 {[%emt 0:00:28]} b6 {[%emt 0:00:59]} 11. Be3 {[%emt 0:00:08]} Bb7 {[%emt 0:00:28]} 12. f3 {[%emt 0:00:03]} Qc7 {[%emt 0:07:42]} 13. Qd2 {[%emt 0:00:28]} Rfd8 {[%emt 0:11:16]} 14. Rfd1 {[%emt 0:00:27]} Nc5 {[%emt 0:00:52]} 15. Nxc5 {[%emt 0:04:36]} dxc5 {[%emt 0:00:35]} 16. Qe1 {[%emt 0:00:35]} Bc8 {[%emt 0:08:53]} 17. Rxd8+ {[%emt 0:07:06]} Bxd8 {[%emt 0:00:40]} 18. Bc4 {[%emt 0:01:49]} Be6 {[%emt 0:00:27]} 19. Qe2 {[%emt 0:00:55]} Qc8 {[%emt 0:15:30]} 20. Rd1 {[%emt 0:06:31]} Be7 {[%emt 0:01:35]} 21. Bg5 {[%emt 0:09:20]} Bxc4 {[%emt 0:19:03]} 22. Qxc4 {[%emt 0:00:06]} Ng4 {[%emt 0:00:05]} 23. Bxe7 {[%emt 0:04:49]} Nf2+ {[%emt 0:00:04]} 24. Kg1 {[%emt 0:00:06]} Nxd1 {[%emt 0:00:05]} 25. Nxd1 {[%emt 0:00:04]} b5 {[%emt 0:15:46]} 26. Qd3 {[%emt 0:08:15]} Ra7 {[%emt 0:00:49]} 27. Bg5 {[%emt 0:00:41]} Rd7 {[%emt 0:00:03]} 28. Qe2 {[%emt 0:00:41]} c4 {[%emt 0:01:03]} 29. axb5 {[%emt 0:02:11]} axb5 {[%emt 0:00:29]} 30. Nc3 {[%emt 0:00:41]} Qc5+ {[%emt 0:02:57]} 31. Qf2 {[%emt 0:02:15]} Qb4 {[%emt 0:00:30]} 32. Bc1 {[%emt 0:03:41]} Rd4 {[%emt 0:06:58]} 33. Qe2 {[%emt 0:01:50]} Qa5 {[%emt 0:00:23]} 34. Be3 {[%emt 0:00:41]} Rd8 {[%emt 0:03:26]} 35. Kf2 {[%emt 0:00:25]} Qa1 {[%emt 0:00:05]} 36. Nxb5 {[%emt 0:00:34]} Qxb2 {[%emt 0:00:53]} 37. Qxc4 {[%emt 0:00:25]} h6 {[%emt 0:00:01]} 38. Na7 {[%emt 0:02:34]} Rd1 {[%emt 0:01:18]} 39. Nc6 {[%emt 0:00:36]} Rd7 {[%emt 0:01:28]} 40. Nxe5 {[%emt 0:00:36]} Re7 {[%emt 0:00:16]} 41. Nd3 {[%emt 0:00:36]} Qb1 {[%emt 0:00:14]} 42. Nb4 {[%emt 0:00:38]} Kh7 {[%emt 0:00:42]} 43. Nd5 {[%emt 0:01:00]} Rb7 {[%emt 0:00:01]} 44. Qc8 {[%emt 0:00:23]} Rb2 {[%emt 0:01:26]} 45. Qf5+ {[%emt 0:00:08]} Kh8 {[%emt 0:00:01]} 46. Qc8+ {[%emt 0:01:05]} Kh7 {[%emt 0:00:01]} 47. Kg3 {[%emt 0:00:09]} Rxc2 {[%emt 0:01:48]} 48. Qf5+ {[%emt 0:00:34]} Kg8 {[%emt 0:00:02]} 49. Bd4 {[%emt 0:02:56]} Qf1 {[%emt 0:01:09]} 50. Nf4 {[%emt 0:01:34]} g5 {[%emt 0:00:31]} 51. Qf6 {[%emt 0:01:07]} Qe1+ {[%emt 0:00:14]} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.5"]
[White "Asaria, Danial"]
[Black "Oberoi, Shelev"]
[Result "1-0"]
[ECO "A50"]
[WhiteElo "2284"]
[BlackElo "2133"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,61,30,26,25,25,21,21,70,50,54,63,56,66,82,82,89,71,112,105,108,111,87,115,109,102,118,114,312,328,326,319,339,319,287,240,803,814,881,864,815,851,834,847,4966,4890,1331,1293,29980,29981,29993,29986,29986,29981]} 1. d4 Nf6 2. c4 b6 3. Nc3 Bb7 4. Qc2 d5 5. cxd5 Nxd5 6. e4 Nxc3 {A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6).} 7. bxc3 e6 8. Nf3 c5 {The position is equal.} 9. Bb5+ Bc6 $1 {[%cal Rc6b5]} 10. Bxc6+ Nxc6 {[#]} 11. O-O $146 ({Predecessor:} 11. Be3 cxd4 12. cxd4 Rc8 13. Qa4 Bb4+ 14. Ke2 O-O 15. Rac1 Qd7 16. Qb3 Be7 17. Rhd1 {½-½ (26) Lauer,F (1015)-Bieszk,S (983) LSS email 2014}) 11... cxd4 12. cxd4 Rc8 13. Bb2 Qd7 14. d5 Ne5 15. Qb3 ({Not} 15. Nxe5 Rxc2 16. Nxd7 Kxd7 $15) 15... Nxf3+ 16. Qxf3 f6 17. Qh5+ g6 18. Qh4 g5 $2 {[#]} (18... Bg7 $16) 19. Qh5+ $1 $18 Qf7 20. Qh3 Bc5 21. dxe6 Qg6 22. Rad1 {[%cal Ba1d1,Bd1d7,Bd7e7][%mdl 32] Hoping for Qb3.} g4 $2 (22... O-O 23. Qb3 Rfe8) 23. Qb3 Be7 24. Rd7 Qxe4 25. Qb5 {Rd8+! would kill now.} O-O 26. Rxe7 Rc5 27. Qd7 {White wants to mate with Bxf6!} Qg6 28. Re1 Rc2 29. Rf7 {White mates.} Rfc8 {[#]} 30. e7 $1 {[%mdl 512]} Qxf7 31. e8=Q+ {White took control after the opening.  Weighted Error Value: White=0.03/Black=0.50} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.6"]
[White "Wu, Rochelle"]
[Black "Tello Chavez, Isaac Valent"]
[Result "1/2-1/2"]
[ECO "B19"]
[WhiteElo "2029"]
[BlackElo "2275"]
[Annotator "RC"]
[PlyCount "47"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. e4 {[%emt 0:25:13]} c6 {[%emt 0:00:04]} 2. d4 {[%emt 0:00:32]} d5 {[%emt 0:00:17]} 3. Nc3 {[%emt 0:00:16]} dxe4 {[%emt 0:00:18]} 4. Nxe4 {[%emt 0:00:16]} Bf5 {[%emt 0:00:11]} 5. Ng3 {[%emt 0:00:12]} Bg6 {[%emt 0:00:07]} 6. h4 {[%emt 0:00:29]} h6 {[%emt 0:00:15]} 7. Nf3 {[%emt 0:00:14]} Nf6 {[%emt 0:03:28]} 8. h5 {[%emt 0:00:52]} Bh7 {[%emt 0:00:06]} 9. Bd3 {[%emt 0:00:06]} Bxd3 {[%emt 0:00:17]} 10. Qxd3 {[%emt 0:00:09]} c5 {[%emt 0:06:05]} 11. dxc5 {[%emt 0:04:58]} Qxd3 {[%emt 0:10:02]} 12. cxd3 {[%emt 0:00:05]} Nc6 {[%emt 0:00:37]} 13. a3 {[%emt 0:05:28]} e6 {[%emt 0:04:45]} 14. Be3 {[%emt 0:01:59]} a5 {[%emt 0:03:31]} 15. Rc1 {[%emt 0:03:39]} Be7 {[%emt 0:01:27]} 16. Rc4 {[%emt 0:05:20]} O-O {[%emt 0:06:23]} 17. Ke2 {[%emt 0:05:08]} Rfd8 {[%emt 0:09:18]} 18. Ne4 {[%emt 0:03:03]} Rd5 {[%emt 0:07:10]} 19. Nxf6+ {[%emt 0:15:51]} Bxf6 {[%emt 0:01:37]} 20. b3 {[%emt 0:11:35]} Bb2 {[%emt 0:03:17]} 21. Bc1 {[%emt 0:00:35]} Bd4 {[%emt 0:01:30]} 22. Be3 {[%emt 0:00:53]} Bb2 {[%emt 0:01:21]} 23. Bc1 {[%emt 0:00:21]} Bd4 {[%emt 0:00:06]} 24. Be3 {[%emt 0:00:04]} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.7"]
[White "Stearman, Josiah"]
[Black "Wu, Derek"]
[Result "0-1"]
[ECO "E05"]
[WhiteElo "2391"]
[BlackElo "2106"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,64,-25,-18,-20,-20,-8,-28,-34,-87,-72,-71,-64,-88,-82,-94,-98,-164,-162,-189,-196,-201,-187,-314,-318,-379,-345,-381,-360,-368,-359,-582,-577,-821,-820,-818,-812,-802,-790,-754,-691]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Nc3 b5 11. Qd3 b4 12. Nb1 Be4 13. Qd1 c5 14. Nbd2 Bd5 {E05: Open Catalan: 5 Nf3 Be7.} 15. dxc5 Nbd7 16. c6 Bxc6 {Black has an edge.} 17. Nc4 (17. b3 $15) 17... Bd5 18. Ne3 Be4 {[#]} 19. Bd2 $146 ({Predecessor:} 19. Nd2 Bxg2 20. Kxg2 Qc7 21. Nec4 Nc5 22. Kg1 Rac8 23. a5 Nce4 24. Nb6 Rcd8 25. Qe1 {0-1 (40) Ivekovic,B (2406)-Bosnjak,P (2255) Zadar 2018}) 19... Rc8 20. a5 Qc7 21. Ne1 (21. Qb3 $17 {is a better defense.}) 21... Rfd8 $19 22. Bxe4 Nxe4 23. Nd3 Ne5 24. Be1 (24. Rc1 $142 Qxa5 25. Rxc8 Rxc8 26. Bc1) 24... Qb7 25. Nxe5 {[#] Hoping for Qa4.} Rxd1 26. Rxd1 Qb5 27. Nd3 Qxa5 28. f3 $2 (28. Ng2) 28... Qb6 {Black is clearly winning.} 29. Bf2 Nxf2 30. Kxf2 Bf6 31. Rc1 Rxc1 32. Rxc1 h5 {Black took control after the opening. Accuracy: White = 35%, Black = 100%.} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.8"]
[White "Tsay, Vincent"]
[Black "Lu, Jason"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2266"]
[BlackElo "2025"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,62,0,5,4,43,31,35,32,96,-2,26,-33,-38,-42,58,56,208,207,256,251,243,239,242,172,173,161,166,155,171,168,204,208,756,723,889,854,1197,1151,2045,1573,29986,29987,29989,29988,29988,29989,29996,29997,29997,29998,29998,29998,29998,29999,29999]} 1. d4 Nf6 2. Bf4 g6 3. Nc3 d5 4. e3 Bg7 5. h4 h5 6. Nf3 {A45: Trompowsky Attack.} c5 7. Nb5 {Black must now prevent Nc7+.} Na6 8. c3 {[#] White is slightly better.} Bf5 $146 (8... O-O $14) ({Predecessor:} 8... O-O 9. Be2 Bg4 10. Ne5 Bxe2 11. Qxe2 Qc8 12. O-O Ng4 13. Nxg4 Qxg4 14. Qxg4 hxg4 {½-½ (51) Swayams,M (2468)-Gopal,G (2594) Kolkata 2019}) 9. Ne5 (9. dxc5 $1 $16 Ne4 10. b4) 9... Nd7 10. g4 (10. Nxd7 $11 Qxd7 11. dxc5) 10... hxg4 $15 11. Nxg4 Bxg4 (11... Qb6 $15) 12. Qxg4 $14 e5 $2 {[#] Black cannot hold the game after this.} (12... Kf8 $14) 13. dxe5 $1 $18 Nxe5 14. Bxe5 Bxe5 {[#]} 15. O-O-O $1 Nc7 16. Nxc7+ Qxc7 17. Rxd5 Rd8 18. Bc4 Rxd5 19. Bxd5 Rh5 20. Rd1 {Threatens to win with Bxf7+!} Kf8 $2 {[#]} (20... Bd6 21. Qa4+ Kf8 22. Qxa7 Rxh4 23. Qa8+ (23. Bxb7 Be7 $18) (23. Qxb7 Qxb7 24. Bxb7 Ke7 $18) 23... Qb8 24. Qxb8+ (24. Qxb7 Qxb7 25. Bxb7 Ke7 $18) (24. Bxb7 Qxa8 25. Bxa8 Ke7 $18) 24... Bxb8 25. Bxb7 Ke7) 21. Bxf7 $1 {[%mdl 512]} Rf5 (21... Qxf7 22. Qc8+) 22. Bc4 Qb6 23. f4 Bg7 24. e4 Bxc3 25. bxc3 {White mates.} Qa5 26. exf5 Qxc3+ 27. Kb1 Qxc4 28. Rd8+ Ke7 29. Qg5+ Kf7 30. Qxg6+ Ke7 31. Qd6+ Kf7 32. Qf8# {Weighted Error Value: White=0.23/Black=0.73} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.9"]
[White "Park, Evan"]
[Black "Truelson, Joseph"]
[Result "1/2-1/2"]
[ECO "C48"]
[WhiteElo "2173"]
[BlackElo "2046"]
[Annotator "NA"]
[PlyCount "99"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. e4 {[%emt 0:00:00]} e5 {[%emt 0:00:34]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:08]} 3. Bb5 {[%emt 0:00:13]} Nf6 {[%emt 0:00:06]} 4. d3 {[%emt 0:00:21]} Bc5 {[%emt 0:00:05]} 5. c3 {[%emt 0:00:49]} d6 {[%emt 0:01:59]} 6. O-O {[%emt 0:00:10]} O-O {[%emt 0:01:11]} 7. Nbd2 {[%emt 0:01:24]} Bb6 {[%emt 0:05:06]} 8. Nc4 {[%emt 0:13:45]} Ne7 {[%emt 0:00:32]} 9. Nxb6 {[%emt 0:02:11]} axb6 {[%emt 0:00:09]} 10. Re1 {[%emt 0:01:30]} Ng6 {[%emt 0:00:52]} 11. d4 {[%emt 0:05:46]} h6 {[%emt 0:04:37]} 12. b3 {[%emt 0:03:29]} Bd7 {[%emt 0:04:46]} 13. Bd3 {[%emt 0:03:36]} Re8 {[%emt 0:01:26]} 14. Bb2 {[%emt 0:04:50]} Bc6 {[%emt 0:05:10]} 15. Qb1 {[%emt 0:16:04]} Nh7 {[%emt 0:03:55]} 16. c4 {[%emt 0:03:33]} Ng5 {[%emt 0:01:17]} 17. Qd1 {[%emt 0:01:43]} exd4 {[%emt 0:06:25]} 18. Nxg5 {[%emt 0:02:55]} Qxg5 {[%emt 0:00:14]} 19. Bxd4 {[%emt 0:00:51]} f5 {[%emt 0:05:02]} 20. Be3 {[%emt 0:07:44]} Qf6 {[%emt 0:06:23]} 21. exf5 {[%emt 0:01:49]} Nh4 {[%emt 0:50:33]} 22. f3 {[%emt 0:01:39]} (22. Bf1 $17 {keeps fighting.}) 22... Nxf5 {[%emt 0:00:00]} 23. Bf2 {[%emt 0:00:19]} Rxe1+ {[%emt 0:00:00]} 24. Qxe1 {[%emt 0:00:23]} Re8 {[%emt 0:00:00]} 25. Qf1 {[%emt 0:03:52]} Ne3 {[%emt 0:00:00]} 26. Bxe3 {[%emt 0:02:15]} Rxe3 {[%emt 0:00:00]} 27. Rd1 {[%emt 0:00:57]} Qg5 {[%emt 0:00:00]} 28. Kh1 {[%emt 0:01:06]} Qf6 {[%emt 0:00:00]} 29. Re1 {[%emt 0:02:24]} Qe5 {[%emt 0:00:00]} 30. Rxe3 {[%emt 0:00:40]} Qxe3 {[%emt 0:00:00]} 31. Qe2 {[%emt 0:01:08]} Qc1+ {[%emt 0:00:00]} 32. Qf1 {[%emt 0:00:05]} Qd2 {[%emt 0:00:00]} 33. Qe2 {[%emt 0:01:37]} Qc1+ {[%emt 0:00:00]} 34. Qf1 {[%emt 0:00:09]} Qd2 {[%emt 0:00:00]} 35. Qb1 {[%emt 0:02:11]} h5 {[%emt 0:00:00]} 36. h3 {[%emt 0:01:32]} h4 {[%emt 0:07:30]} 37. Bh7+ {[%emt 0:01:36]} Kh8 {[%emt 0:00:00]} 38. Be4 {[%emt 0:00:34]} d5 {[%emt 0:00:00]} 39. cxd5 {[%emt 0:00:38]} Bxd5 {[%emt 0:00:00]} 40. Bxd5 {[%emt 0:01:28]} Qxd5 {[%emt 0:02:00]} 41. Qc1 {[%emt 0:01:13]} Qe5 {[%emt 0:00:00]} 42. Qd1 {[%emt 0:00:34]} Qf4 $11 {[%emt 0:00:00]} 43. Qe1 {[%emt 0:01:40]} Kh7 {[%emt 0:00:00]} 44. a4 {[%emt 0:00:55]} g5 {[%emt 0:00:00]} 45. Qe4+ {[%emt 0:03:12]} Kg7 {[%emt 0:00:00]} 46. Qe7+ {[%emt 0:00:19]} Kg6 {[%emt 0:00:00]} 47. Qe8+ {[%emt 0:00:47]} Kf6 {[%emt 0:00:00]} 48. Qf8+ {[%emt 0:00:34]} Ke6 {[%emt 0:00:00]} 49. Qg8+ {[%emt 0:00:57]} Kd6 {[%emt 0:00:00]} 50. Qc8 {[%emt 0:01:21]} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.20"]
[Round "3.10"]
[White "Lu, Ming"]
[Black "Amburgy, Ryan"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2154"]
[BlackElo "1885"]
[Annotator "TA"]
[PlyCount "223"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,223,8,4,19,-12,3,0,-8,-49,-39,-139,-121,-217,-84,-100,-100,-95,18,16,16,10,25,0,0,0,15,0,0,0,0,-29,0,-20,0,-30,-28,-54,-20,-45,2,-87,0,0,40,7,0,0,0,0,0,0,0,0,0,0,8,8,13,0,0,0,13,12,137,135,135,149,147,147,142,116,116,122,121,86,116,103,103,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,0,87,87,87,0,87,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,46,72,72,72,72,72,72,72,72,72,72,72,72,72,72,78,78,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,0,200,200,200,200,200,200,193,192,29959,29962,29956,29961,29962,29963,29963,29962,29967,29969,29965,29971,29970,29972,29974,29975,29980,29981,29981,29981,29980,29981,29996,29991]} 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3 6. Qxc3 d6 {A28: English Opening: Four Knights Variation.} 7. d4 {[%cal Rd4e5]} Bg4 {[#]} 8. dxe5 $146 ({Predecessor:} 8. Be2 e4 9. Ng1 Qd7 10. f3 Bh5 11. b3 Ne7 12. d5 Nf5 13. Bb2 Qe7 14. O-O-O {0-1 (47) Hobaica,J (2317)-Bachmann,A (2410) Buenos Aires 2005}) 8... dxe5 {The position is equal.} 9. b3 Qd6 10. a3 (10. Nd2 $15) 10... O-O-O $17 {[%csl Gd8][%cal Rd6d1]} ({But not} 10... Bxf3 $6 11. gxf3 O-O-O 12. Bb2 $11) 11. Bb2 (11. Be2 $17) 11... Rd7 (11... Ne4 $19 {has better winning chances.} 12. Qc1 Qe6) 12. c5 Qd5 13. Bc4 Qxc5 ({Black should play} 13... Qe4 $1 $17 14. Be2 Qg6) 14. Nxe5 $11 Nxe5 15. Qxe5 {[#]} Rhd8 $1 {[%mdl 512] ( -> ...Rd1+)} 16. O-O Qxe5 17. Bxe5 Be6 18. Bxf6 gxf6 19. Rac1 Rd2 20. h4 R8d6 21. Rc3 c6 22. Kh2 Kd7 23. Kg3 Ke7 24. Kf3 Bd7 {Hoping for ...b5.} 25. e4 (25. b4 $11 {keeps the balance.}) 25... h5 (25... b5 $17 26. Be2 a5) 26. Ke3 Bg4 27. Rfc1 a5 28. Bd3 Ra2 29. b4 axb4 30. axb4 Rb2 31. b5 cxb5 32. R1c2 Rb1 33. Rc7+ Bd7 34. Rd2 Rb3 35. Ke2 Kd8 36. Rxb7 b4 (36... f5 $11 {remains equal.}) 37. Bc2 $1 $16 Rxd2+ 38. Kxd2 {[%mdl 4096] Endgame KRB-KRB} Rb2 {...Bc6 is the strong threat.} 39. Kc1 $1 {[%cal Rc1b2]} Ra2 40. Rxb4 Ke7 41. Rb2 Ra1+ 42. Bb1 Ra5 43. Kd2 f5 44. exf5 Bxf5 45. Bxf5 Rxf5 {KR-KR} 46. Ke3 Kf6 47. Ke4 {White threatens Rb6+ and mate.} Ra5 48. Kf4 Ra4+ 49. Kg3 $1 Kg6 50. Rb3 f6 51. Rc3 Rb4 52. Ra3 Rc4 53. Rb3 Ra4 54. Kh3 Ra2 55. Kg3 Ra4 56. f3 Ra6 57. Rc3 Rb6 58. Rd3 Ra6 59. Re3 Rb6 60. Ra3 Rc6 61. Kh3 {Cut Off at move 61} f5 62. Ra4 Rb6 63. Kg3 Rb2 64. Ra6+ Kg7 65. Rc6 Rb4 66. Rc7+ Kg6 67. Rc8 Kg7 68. Rc2 Ra4 69. Rb2 Rc4 70. Ra2 Rb4 71. Re2 Ra4 72. Kh3 Ra3 73. Kh2 Rb3 74. Rf2 Kg6 75. g3 Ra3 76. Kh3 Rb3 77. Kg2 Ra3 78. Rd2 Rb3 79. Kf2 $1 Ra3 80. Rd6+ Kg7 81. Ke2 Rb3 82. Rd3 Rb4 83. Ke3 Rb6 84. Rd8 Kf6 85. Rf8+ Kg6 (85... Ke5 $16 {was worth a try.}) 86. Rg8+ $1 $18 Kf6 87. Rg5 $1 Rb3+ 88. Kf2 Rb2+ 89. Kg1 f4 90. gxf4 Rb4 91. Rxh5 Rxf4 92. Kg2 Ra4 93. Kg3 Rb4 94. Ra5 Rc4 95. Ra6+ Kf5 96. Ra5+ Kf6 $1 97. Ra1 Kf5 98. Re1 Ra4 {[#]} 99. Re4 $1 Ra1 (99... Rxe4 100. fxe4+) 100. Rf4+ Ke5 $2 {[#]} (100... Kg6 $18 101. Rg4+ Kh6) 101. Rf8 $1 {White mates.} Rg1+ 102. Kh3 Ke6 {[#]} 103. h5 $1 Ke7 104. Rf4 Ke6 105. Kh4 Ke5 106. Rg4 Rf1 107. Kg5 Rxf3 108. h6 Ra3 109. h7 Ra8 110. Rh4 Rh8 111. Kg6 Rg8+ 112. hxg8=N {Both players deserved the win here.  Weighted Error Value: White=0.19/Black=0.16} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.1"]
[White "Liang, Jason"]
[Black "Asaria, Danial"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "2317"]
[BlackElo "2284"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,117,34,31,23,20,59,20,30,20,30,19,31,16,5,0,25,17,25,0,0,-70,-63,-89,-83,-91,-86,-109,-37,-31,-28,-56,-49,-60,-47,-69,-45,-15,0,0,0,0,0,0,0,-16,0,0,0,0,0,0,79,78,84,84,137,139,159,65,169,146,180,45,45,55,112,95,508,508,508,508,508,507,503,497,471,461,445,418,450,425,427,387,379,370,562,555,669,657,588,413,409,402,374,345,29951,29957,29956,29960,29965,5093,29990,29977,29977,29978]} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bd6 7. Bd3 O-O 8. Qc2 Re8+ {B15: Caro-Kann: 3 Nc3: 3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6.} 9. Ne2 h5 {9...h5 is better than 9...h6.} 10. Be3 (10. O-O {is more complex.} Qc7 11. h3 Be6 12. Be3 a5 13. a3) 10... Nd7 {The position is equal.} 11. O-O-O Nf8 12. c4 Be6 13. Kb1 Rc8 14. h3 h4 (14... b5 $5) 15. Nc3 {[#]} Ng6 $146 ({Predecessor:} 15... a6 16. c5 Bc7 17. Rhg1 Ng6 18. Bxg6 fxg6 19. Qxg6 Qd7 20. Ka1 Ba5 21. Ne4 Rf8 {1-0 (72) Eswaran,A (2244)-Wagh,S (2246) chess.com INT 2020}) 16. c5 Bc7 17. d5 (17. Bf5 $11) 17... cxd5 $15 18. Bxg6 fxg6 19. Qxg6 Be5 20. Bd4 {[#]} b6 ({Better is} 20... Bxd4 $1 $17 21. Rxd4 Rxc5) 21. cxb6 axb6 22. Qd3 Rc4 23. Bxe5 Qc8 $1 24. Qe3 (24. Nxd5 $2 Bf5 $19) 24... Qa8 25. Rd4 (25. Qxb6 $2 fxe5 26. Nb5 Ra4 $19) 25... Rxd4 26. Qxd4 {[%mdl 64] Threatens to win with Bc7. Double Attack} fxe5 27. Qxe5 d4 28. Qxd4 {[%mdl 64] Black must now prevent f3. Double Attack} Qxg2 29. Rd1 Qxh3 {[#]} 30. Rg1 $1 {[%csl Gg1][%cal Rd4g7][%mdl 512]} Re7 31. Ka1 {And now Qd8+ would win.} Rd7 32. Qf4 b5 (32... Rf7 $11 33. Qb8+ Rf8) 33. Ne4 $16 {Hoping for Qb8+.} Qf5 34. Qxh4 {Nf6+ is the strong threat.} Kf8 (34... Qg6 $142 35. Qh1 (35. Rxg6 $2 Rd1#) 35... Qf5) 35. Nc3 Kf7 36. Qg3 ({White should try} 36. Qh8 $16 g5 37. f3) 36... Kf8 (36... g5 $1 $14) 37. Qb8+ $18 Kf7 38. f4 (38. Qh8 $18 g5 39. f3) 38... Qc5 $1 $14 {[%cal Rc5g1]} 39. Re1 $36 {[%mdl 2048] White has some pressure.} b4 ({Black should play} 39... Rd3 $14 40. Qb7+ (40. Qxb5 $2 Rxc3 41. Qxc5 Rxc5 $19) (40. Nxb5 Bd7 $11) 40... Bd7) 40. f5 $1 $16 {[%cal Rf5e6]} ({Don't blunder} 40. Ne4 $2 Qd5 $19) 40... Bxf5 $2 {[%mdl 8192] This costs Black the game.} (40... Qxf5 $16 {is a better chance.} 41. Qxb4 g5) 41. Qe8+ $18 Kf6 42. Ne4+ {[%mdl 64] Overworked Piece} Bxe4 43. Qxd7 {[%mdl 4096] Endgame KQR-KQB} Bf5 44. Qd8+ Kf7 45. Qb8 Kf6 46. Qb7 Qd6 47. Rc1 {Strongly threatening Rc6!} Qd4 48. Qc6+ Kg5 49. Qc4 Qe3 (49... Qd6 $142 50. Qb5 Qd4) 50. Rh1 Qe4 51. Rg1+ Kf6 52. Qc1 g6 53. Re1 Qd5 54. Qf4 b3 $2 (54... g5 $18 55. Qxb4 Be6 56. Qc3+ Kg6 57. Qc2+ Bf5) 55. Qh4+ g5 56. Qh6+ Kf7 57. Qxg5 {White wants to mate with Re7+.} Qc5 58. Rf1 Ke6 {[#]} 59. Qxf5+ $1 {Weighted Error Value: White=0.19/Black=0.57} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.2"]
[White "Sandoval Mercado, Carlos"]
[Black "Wu, Derek"]
[Result "0-1"]
[ECO "E05"]
[WhiteElo "2298"]
[BlackElo "2106"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,96,-3,8,-6,-20,0,0,0,0,0,-44,-39,-90,-34,-41,57,47,54,57,125,136,125,109,141,87,187,197,198,193,188,191,163,131,123,52,179,186,172,164,247,156,155,159,140,110,117,67,59,41,29,0,0,-248,-73,-63,0,-80,22,0,-12,-25,-23,-707,-703,-833,-840,-827,-787,-731,-642,-958,-720,-1013,-1005,-1479,-1252,-1246,-1215]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qa4 a6 8. Qxc4 b5 9. Qc2 Bb7 10. Bd2 Be4 11. Qc1 c6 {E05: Open Catalan: 5 Nf3 Be7.} 12. e3 Nbd7 13. Nc3 Bg6 {The position is equal.} 14. Nh4 Bh5 15. e4 (15. Bxc6 $2 Rc8 $17) 15... Rc8 16. Bf4 ({White should play} 16. Qe1 $15) 16... c5 (16... Nb6 $17) 17. d5 $15 Nb6 (17... Ng4 $15) 18. d6 $1 $36 {[%cal Rd6e7][%mdl 2112] Decoy. White is more active.} Bxd6 {...b4 is the strong threat.} 19. e5 {[%mdl 64] Double Attack} Be7 (19... g5 $14) 20. exf6 $16 Bxf6 {...g5 would now be nice for Black.} 21. Nf3 Nc4 22. Nd2 (22. Re1 $142) 22... e5 (22... g5 $16 {was called for.}) 23. Be3 $18 Nxe3 24. fxe3 Bg5 25. Nde4 Bh6 26. Nf2 f5 27. Qe1 ({White should try} 27. g4 $16 fxg4 28. Nce4) 27... Qd7 (27... b4 $14) 28. Nd5 Rce8 29. e4 Kh8 (29... f4 $142 30. Bh3 Qc6) 30. Qc3 c4 31. Rae1 f4 32. Bh3 Qa7 33. g4 Bf7 {next ...Bxd5 is good for Black.} 34. Rd1 f3 35. Rfe1 Bg5 36. Ne3 $2 {[#]} (36. b3 $11 {and White stays safe.}) 36... Bf4 $2 (36... b4 $1 $19 {[%cal Rb4c3][%mdl 512]} 37. Qc1 (37. Qxb4 Bxe3) 37... Rc8) 37. Nf1 {[%cal Be3f1,Bf1g3,Bg3f5][%mdl 32]} Re6 (37... Be6 $15) 38. Qxf3 (38. g5 $11 {remains equal.} Rg6 39. Qxf3) 38... Bg6 ({Better is} 38... Rf6 $17 {Threatens to win with ...Be6.} 39. Ng3 Be8) 39. Ng3 Ref6 {Strongly threatening ...Bxg3.} 40. Nf5 Be8 $1 41. Rd6 $2 {[%mdl 8192]} (41. Qg2 $11) 41... Rxd6 $19 {Black is clearly winning.} 42. Nxd6 {[#]} Bxh2+ $1 {[%mdl 576] Discovered Attack} 43. Kg2 (43. Kxh2 Rxf3) 43... Rxf3 44. Kxf3 Bg6 45. g5 Bf4 46. Bf5 Bxg5 47. Ng4 Qd4 48. Bxg6 Qxd6 {Black used his chance. Accuracy: White = 41%, Black = 54%.} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.3"]
[White "Paul, Justin"]
[Black "Tsay, Vincent"]
[Result "*"]
[ECO "A08"]
[WhiteElo "2267"]
[BlackElo "2266"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,51,-10,-6,-10,0,-2,30,19,23,18,47,49,45,43,43,49,62,62,62,52,50,28,41,16,10,-20,69,55,86,44,23,28,95,-23,-18,-19,-28,-39]} 1. e4 e6 2. d3 d5 3. Qe2 Ne7 4. Nf3 c5 5. g3 Nbc6 6. Bg2 g6 7. O-O Bg7 8. c3 O-O 9. Na3 {A08: King's Indian Attack.} h6 10. Re1 {[#]} Kh7 $146 ({Predecessor:} 10... a6 11. Nc2 b6 12. e5 a5 13. a4 Ba6 14. h4 Nf5 15. Bf4 Rb8 16. Bh3 d4 {1-0 (37) Kaminski,M (2449)-Flis,J (2297) Miedzyzdroje 2009}) 11. e5 {White has an edge.} Nf5 12. Nc2 f6 13. exf6 Qxf6 14. Bf4 g5 15. Be5 Nxe5 16. Nxe5 Ne7 17. d4 Nc6 $1 18. Qd2 Kg8 {[%cal Rc6e5]} 19. Re3 Nxe5 20. Rxe5 Bd7 ({Black should try} 20... cxd4 $11 21. cxd4 Bd7) 21. Rae1 $14 Qg6 22. R5e2 c4 23. Ne3 h5 (23... a5 $11) 24. Nxd5 (24. b3 $16) 24... exd5 $11 25. Bxd5+ {[%mdl 64] [#] Double Attack} Kh8 26. Bxb7 {Weighted Error Value: White=0.23/Black=0.19} *

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.4"]
[White "Vivekananthan, Anish"]
[Black "Lu, Ming"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2305"]
[BlackElo "2154"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,63,-3,10,6,2,0,6,-8,-1,-12,-6,5,0,0,8,6,15,6,33,38,43,41,81,82,118,115,124,71,91,76,81,85,144,139,156,142,162,159,262,265,264,252,238,220,258,199,212,137,481,358,406,406,562,546,681,667]} 1. a3 d5 2. Nf3 Nf6 3. d4 c6 4. e3 Bf5 5. Bd3 Bg6 6. c4 {A00: Irregular Openings.} e6 7. Nc3 Nbd7 {[#]} 8. Qe2 $146 {The position is equal.} ({Predecessor:} 8. Bxg6 hxg6 9. Qd3 Qa5 10. cxd5 cxd5 11. Bd2 a6 12. O-O Qd8 13. e4 dxe4 14. Nxe4 Be7 {0-1 (59) Vujcic,T (2182)-Muha,M (2362) Grohote 2018}) 8... Ne4 9. Nd2 {[%cal Rd2e4]} f5 10. O-O Bd6 11. f3 Nxd2 12. Bxd2 O-O 13. b4 Qf6 14. c5 Bc7 15. f4 $1 Bf7 16. b5 Kh8 17. bxc6 bxc6 18. g3 ({White should try} 18. Bc2) 18... g5 $16 19. fxg5 Qxg5 20. e4 Qg7 (20... f4 $142) 21. e5 Nxe5 22. dxe5 Bxe5 23. Rac1 d4 (23... Rab8 $16) 24. Bh6 $1 $18 {[%cal Rh6g7][%mdl 64] [#] Skewer, Deflection} Qxh6 25. Qxe5+ {[%mdl 64] Double Attack} Qg7 26. Qxg7+ Kxg7 27. Ne2 Rad8 28. Rf4 Bg6 $2 {[%mdl 8192] [#] This costs Black the game.} (28... e5 $16 {is a better chance.}) 29. Rxd4 e5 30. Rd6 Kf7 31. Bc4+ Ke7 32. Re6+ {Weighted Error Value: White=0.15/Black=0.54} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.5"]
[White "Tello Chavez, Isaac Valent"]
[Black "Venkat, Raghav"]
[Result "0-1"]
[ECO "A36"]
[WhiteElo "2275"]
[BlackElo "2167"]
[Annotator "TA"]
[PlyCount "42"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,42,17,12,12,-7,-3,-4,-7,0,-11,0,0,0,6,-105,-120,-129,-115,-119,-114]} 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. e4 d6 6. Nge2 c5 7. d3 Nc6 8. O-O a6 9. a4 Rb8 10. h3 Ne8 11. Be3 Nc7 12. d4 cxd4 13. Nxd4 Bd7 {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7.} 14. Nde2 b5 15. axb5 axb5 {The position is equal.} 16. c5 dxc5 17. Bxc5 Ne6 18. Be3 b4 19. Na4 (19. Nd5 $1 $11) 19... Ne5 $17 {Black is better.} 20. Qb3 {[#]} Bxa4 $146 ({Predecessor:} 20... Bb5 21. Rfd1 Qc8 22. Nf4 Bc4 23. Qc2 b3 24. Qd2 Nxf4 25. gxf4 Nd3 26. e5 Qf5 {½-½ (32) Bejtovic,J (2390)-Sutkovic,D (2326) Neum 2014}) 21. Rxa4 Qd3 {White got outplayed after the opening.  Weighted Error Value: White=0.22/Black=0.03} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.6"]
[White "Sheng, Joshua"]
[Black "Wu, Rochelle"]
[Result "1-0"]
[ECO "B61"]
[WhiteElo "2474"]
[BlackElo "2029"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,117,79,68,85,95,95,93,68,0,0,0,0,0,0,0,0,14,60,30,89,93,79,74,83,14,24,0,-7,-23,-20,-36,0,-10,-10,-34,-32,-33,-33,-33,-35,-46,-21,-43,0,0,0,0,11,10,9,0,0,-50,6,0,0,0,2,0,8,8,8,8,8,8,11,11,12,11,12,12,12,33,138,141,117,39,37,17,158,-8,0,0,1231,1216,1254,0,422,0,1060,569,569,569,569,552,486,477]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7 7. Qd2 Rc8 8. O-O-O Nxd4 9. Qxd4 Qa5 10. f4 Rxc3 11. bxc3 e5 12. Qb4 $1 {[%cal Rb4a5]} Qxb4 {B61: Sicilian: Richter-Rauzer: 6...Bd7 7 Qd2.} 13. cxb4 Nxe4 {next ...Nf2 is good for Black.} 14. Bh4 $1 g5 {White is better.} 15. Bd3 (15. Bxg5 Nf2 $11) (15. fxg5 $14 Be7 16. a3) 15... Nc3 $11 16. Bxg5 Nxd1 17. Rxd1 Be7 $1 18. Bh6 Rg8 19. g3 f5 20. Be2 $1 e4 (20... Be6 $11 {remains equal.}) 21. Bh5+ $1 $16 Kd8 22. Bf7 Rg4 {[#]} 23. Rd5 $146 (23. Rg1 $1 $16) ({Predecessor:} 23. Rg1 Bh4 24. Bh5 Rg8 25. Bf7 Rg4 26. Bf8 Be8 27. Bd5 Kd7 28. Rd1 Bd8 29. c4 {0-1 (38) Fries Nielsen,J (2355)-Kristiansen,J (2450) Denmark 1982}) 23... Bf6 $1 $11 24. Bh5 Rg8 25. Rxd6 Ke7 $36 {[%mdl 2048] Black is pushing.} 26. Rd5 Be6 {[%mdl 1024] Black has compensation.} 27. Ra5 a6 {[%cal Ba7a6,Ba6a5][%mdl 32]} 28. b5 Bc3 29. Ra3 Bb4 30. Ra4 a5 {And now ...Rc8 would win.} 31. Bg5+ Kd6 {...Rc8 is the strong threat.} 32. Be2 Bc3 (32... Rc8 $5 {[%cal Re6c4]} 33. Bh6 Ke7 $15) 33. g4 Rc8 34. h3 Bd7 35. Bh4 e3 36. Bg3 Rc5 37. Bh4 Rc8 ({Black should try} 37... Bb4 $15) 38. Bg3 Rc5 39. Ra3 b6 40. Kd1 Rd5+ 41. Bd3 Bb4 42. Rb3 fxg4 43. f5+ Ke7 44. hxg4 Bxb5 45. Ke2 {Black must now prevent Bxb5.} Ba4 46. Rb2 Rd4 47. g5 Rg4 {[#]} (47... Bc6 $14) 48. Kf3 $1 $16 {[%cal Rf3g4]} Rd4 49. f6+ ({White should play} 49. Kxe3 $16 Bc5 50. Ke2) 49... Kf7 $14 50. Be5 Rh4 (50... e2 $11 51. Bxe2 Bc6+ 52. Kf2 Re4 53. Bh5+ Ke6) 51. Kg3 $2 ({Don't play} 51. Kxe3 $6 Bc6 $11) (51. c3 $16 Bc5 52. Bd4 Rh3+ 53. Ke4 Bc6+ 54. Ke5) 51... Be1+ 52. Kf3 Rh3+ $2 {[%mdl 8192]} (52... Bb4 $11) 53. Ke2 $18 Rh4 54. Kf3 (54. Rxb6 $142 {Intending Rb7+ and mate.} Rb4 55. Ra6 (55. Kxe1 Rxb6 56. Bxh7 Rb1+ 57. Ke2 Rg1 $16)) 54... Rh3+ {[#]} 55. Ke2 $2 (55. Kg2 $1 $18 Rh4 56. Rxb6) 55... Bg3 $2 {[%mdl 8192] [#]} (55... Rh4 $11) 56. g6+ $1 {[%mdl 512] White is clearly winning.} hxg6 57. Bc4+ Kf8 58. Bxg3 Rxg3 59. Rxb6 {Accuracy: White = 73%, Black = 68%.} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.7"]
[White "Kumar, Naman"]
[Black "Chasin, Nico"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2115"]
[BlackElo "2303"]
[Annotator "ChessBase"]
[PlyCount "50"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. e4 {[%emt 0:00:00]} Nc6 {[%emt 0:04:55]} 2. d4 {[%emt 0:02:47]} d5 {[%emt 0:00:05]} 3. exd5 {[%emt 0:01:29]} Qxd5 {[%emt 0:00:07]} 4. Be3 {[%emt 0:00:31]} e5 {[%emt 0:02:45]} 5. dxe5 {[%emt 0:04:55]} Qxd1+ {[%emt 0:00:06]} 6. Kxd1 {[%emt 0:00:09]} Nxe5 {[%emt 0:00:03]} 7. Be2 {[%emt 0:14:42]} Ng4 {[%emt 0:02:18]} 8. Bxg4 {[%emt 0:10:00]} Bxg4+ {[%emt 0:00:02]} 9. Ne2 {[%emt 0:02:02]} O-O-O+ {[%emt 0:00:13]} 10. Ke1 {[%emt 0:00:31]} Nf6 {[%emt 0:00:02]} 11. f3 {[%emt 0:15:31]} Bf5 {[%emt 0:01:16]} 12. c4 {[%emt 0:01:29]} Nd7 {[%emt 0:06:37]} 13. f4 {[%emt 0:16:03]} Bb4+ {[%emt 0:02:47]} 14. Nbc3 {[%emt 0:03:46]} Rhe8 {[%emt 0:00:52]} 15. Kf2 {[%emt 0:05:48]} Nf6 {[%emt 0:00:02]} 16. h3 {[%emt 0:03:36]} Rxe3 {[%emt 0:00:02]} 17. Kxe3 {[%emt 0:02:07]} Bc5+ {[%emt 0:00:03]} 18. Nd4 {[%emt 0:00:15]} Bxd4+ {[%emt 0:01:09]} 19. Ke2 {[%emt 0:01:17]} Re8+ {[%emt 0:01:15]} 20. Kd2 {[%emt 0:00:39]} Be3+ {[%emt 0:00:06]} 21. Kd1 {[%emt 0:00:28]} Bxf4 {[%emt 0:00:36]} 22. g4 {[%emt 0:02:26]} Bg6 {[%emt 0:00:55]} 23. Re1 {[%emt 0:00:33]} Ne4 {[%emt 0:00:48]} 24. Nxe4 {[%emt 0:00:50]} Bxe4 {[%emt 0:00:09]} 25. a4 {[%emt 0:00:49]} a5 {[%emt 0:00:11]} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.8"]
[White "Truelson, Joseph"]
[Black "Chiu, Isaac"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2046"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,71,63,7,9,5,0,0,3,-7,-7,-23,-23,-25,0,-46,-47,-48,-44,-54,-49,-64,-58,-60,-63,-56,-50,-75,-75,-77,-73,-60,-50,-51,-41,-45,-12,-14,-17,-35,-35,-35,-35,-35,-35,-35,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-24,-35]} 1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Bd3 Nf6 5. O-O O-O 6. h3 Nc6 7. c3 e5 8. dxe5 (8. Re1 $14) 8... Nxe5 $11 {B07: Pirc Defence: Miscellaneous Systems.} 9. Nxe5 dxe5 10. Bg5 h6 {The position is equal.} 11. Bxf6 Qxf6 {[#]} 12. Na3 $146 ({Predecessor:} 12. Nd2 Rd8 13. Nf3 Rd6 14. Qe2 g5 15. Nh2 h5 16. Rfd1 g4 17. hxg4 hxg4 18. Bc4 {½-½ (48) Kosnar,M (2109)-Michalek,J (2258) Czech Republic 2018}) 12... Rd8 13. Qe2 c6 14. Rad1 b5 15. Nc2 Bf8 16. a4 a6 17. b4 Be6 18. axb5 axb5 19. Ra1 Qe7 20. Rxa8 Rxa8 21. Ra1 Rxa1+ 22. Nxa1 Qa7 23. Qb2 Be7 {[#] ...Bh4 is the strong threat.} 24. Nb3 Bxb3 25. Qxb3 Qa1+ 26. Kh2 Qe1 {Strongly threatening ...Bh4.} 27. Qc2 h5 28. g3 h4 29. g4 Bg5 {Hoping for ...Bd2.} 30. Kg2 {Black has an edge.} Qd2 31. Qxd2 Bxd2 32. c4 bxc4 33. Bxc4 Bxb4 34. Kf3 Bd2 35. Ke2 Bc1 36. Ba6 {Weighted Error Value: White=0.10/Black=0.04} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.9"]
[White "Pozas, Pablo Fernandez"]
[Black "Quiroga Jaquez, Angel Ivan"]
[Result "0-1"]
[ECO "D36"]
[BlackElo "2178"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,83,19,25,32,27,0,8,0,0,-4,29,20,39,51,33,13,29,27,33,7,50,59,100,73,43,41,124,111,129,79,150,146,222,220,218,114,85,69,76,69,137,122,271,201,210,194,369,359,345,136,126,89,160,-830,-827,-810,-787,-779,-770,-869,-869,-876,-871,-856,-845,-29987,-683,-614,2035,-551]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Bd3 Nbd7 8. Qc2 Nh5 $1 {[%mdl 4] is recently more successful than 8...0-0.} 9. Bxe7 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2).} Qxe7 10. Qe2 g6 11. Nf3 {The position is equal.} O-O 12. O-O {[#]} f5 $146 ({Predecessor:} 12... Re8 13. Rfe1 Nb6 14. Nd2 Qg5 15. Qf1 Bf5 16. b4 a6 17. a4 Ng7 18. b5 axb5 19. axb5 Rxa1 20. Rxa1 Rxe3 21. fxe3 Qxe3+ {0-1 (36) Bekturov,T (1934)-Vokarev,S (2457) Pavlodar 2015}) 13. Rab1 a5 14. Qc2 Nhf6 15. Na4 Ne4 16. a3 g5 17. Nd2 Rf6 18. f3 Nd6 19. Rbe1 b5 20. Nc3 (20. Qxc6 $2 Bb7 $19) 20... Qg7 (20... Ba6 $1 $14) 21. Ne2 $16 Nb6 22. e4 (22. Qxc6 Ndc4 $17) 22... fxe4 ({Better is} 22... Ndc4) 23. fxe4 Rxf1+ (23... dxe4 $16 24. Nxe4 (24. Bxe4 Nxe4 25. Nxe4 Rg6 $16) 24... Nxe4) 24. Rxf1 $18 Ndc4 25. Bxc4 ({White has to play} 25. e5 $18) 25... Nxc4 $16 26. Nxc4 dxc4 27. e5 Bd7 (27... Bg4 $14) 28. Ng3 {Strongly threatening Rf6.} Be8 (28... Rf8 $16) 29. Qd2 {Hoping for Nf5.} Bg6 {[#]} 30. Rf6 $1 ({Resist} 30. Qxg5 Bd3) 30... h6 $2 (30... Rf8) 31. Rxc6 $18 Rd8 32. Qxa5 $2 (32. Qe3 $18) 32... Rxd4 $16 33. Qxb5 {h3 is the strong threat.} Be8 ({Black should play} 33... Rd1+ 34. Kf2 (34. Nf1 $2 Bd3 $17) 34... Kh7) 34. Rc8 $2 {[#]} (34. Qb8 $16 Rd1+ 35. Kf2) 34... Qf8 $1 $19 35. Qxc4+ Rxc4 36. Rxc4 Bb5 37. Rc3 Qd8 {( -> ...Qd4+)} 38. h3 Qd4+ 39. Kh2 Qxe5 40. b4 Qd4 (40... Qxc3 $142 41. a4 Bxa4 42. h4 Qxb4 43. Nh5 Qxh4+ {[%mdl 64] Double Attack} 44. Kg1 Qd4+ 45. Kh2 Bc6 46. Nf6+ Qxf6 47. Kg1 Qf4 48. Kh1 Qf1+ {[%mdl 64] Double Attack} 49. Kh2 Qxg2#) 41. Rc8+ Qd8 $4 {[%mdl 8192]} (41... Kf7 $19 42. Rc5 Bd7) 42. Rc5 $4 {[%mdl 8192] A wild game.  Weighted Error Value: White=0.68/Black=0.50} (42. Rxd8+ $18 {is the narrow road to win.} Kf7 43. Rb8) 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "4.10"]
[White "Liang, Dustin"]
[Black "Park, Evan"]
[Result "*"]
[ECO "C50"]
[WhiteElo "1960"]
[BlackElo "2173"]
[Annotator "TA"]
[PlyCount "50"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,50,12,1,8,8,14,-4,-3,-8,21,-3,0,-74,-82,-74,-83,-72,-75,-106,-95,-91,-94,-97,-99,-129,-135,-187,-178,-304,-302,-305,-313,-649,-622,-418,-135,-212,-204,-191,-193,-174,-192]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. Nc3 Bc5 6. h3 a6 {outshines the older 6...d6. C50: Hungarian Defence and Giuoco Pianissimo.} 7. Be3 d6 8. Qd2 Bxe3 {The position is equal.} 9. Qxe3 {[#]} Na5 $146 ({Predecessor:} 9... Ne7 10. a4 Ng6 11. O-O O-O 12. Ne2 c6 13. Ng3 Re8 14. Rfe1 Bd7 15. Rad1 d5 {0-1 (63) Dajcman,N (1299)-Florjancic,R (1839) Ptuj 2015}) 10. Bb3 O-O 11. d4 (11. g4 $11) 11... exd4 $17 12. Qxd4 {[#]} b5 $1 {[%cal Bb7b5,Bb5b4][%mdl 32] aiming for ...c5.} 13. Qd3 b4 14. Ne2 Nxb3 15. axb3 Bb7 16. Nd2 Re8 {[%cal Rf6e4]} 17. f3 d5 {[%cal Rd5e4]} 18. Ng3 (18. O-O $17 {might work better.}) 18... dxe4 $19 19. Ndxe4 (19. Qxd8 $142 Raxd8 20. O-O-O) 19... Nxe4 20. fxe4 {[#]} Bxe4 $1 {[%mdl 512]} 21. Nxe4 $2 (21. Qxd8 Raxd8 22. Nxe4) 21... Qh4+ {[%mdl 64] Double Attack} 22. g3 Qxe4+ $2 (22... Rxe4+ $19 23. Kf2 Qf6+ 24. Qf3 Qd4+ 25. Kf1 Rd8) 23. Kf2 (23. Qxe4 $17 Rxe4+ 24. Kd2) 23... Qxd3 24. cxd3 Rad8 25. Rad1 Rd6 {White got outplayed after the opening. Accuracy: White = 45%, Black = 81%.} *

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.1"]
[White "Venkat, Raghav"]
[Black "Liang, Jason"]
[Result "0-1"]
[ECO "B53"]
[WhiteElo "2167"]
[BlackElo "2317"]
[Annotator "TA"]
[PlyCount "102"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,102,19,25,23,-22,45,37,39,33,41,26,26,-74,-4,-34,-29,-38,-37,-37,-35,-31,-31,-53,-54,-56,-51,-51,-50,-54,-52,-52,-31,-30,-41,-38,-37,-46,-30,-43,-25,-30,-20,-20,-6,-8,-8,-9,-11,-20,-18,-27,-20,-31,-31,-31,-33,-49,-47,-93,-94,-102,-94,-140,-140,-141,-141,-351,-363,-585,-587,-583,-581,-560,-553,-553,-546,-535,-531,-512,-512,-495,-435,-497,-483,-1546,-1228,-7070,-6546,-4627,-4627]} 1. e4 {Gofshtein,L} c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nf6 5. Nc3 a6 6. Bg5 Nc6 7. Qd2 e6 8. O-O-O h6 {B53: Sicilian: 2...d6: Lines with Qxd4.} 9. Bxf6 gxf6 (9... Qxf6 $11 10. h4 Qd8) 10. Nd4 Bd7 {White is slightly better.} 11. f4 h5 {[#]} 12. g3 $146 ({Predecessor:} 12. Kb1 Qb6 13. Nb3 O-O-O 14. Be2 h4 15. Rhf1 Be7 16. Rf3 Kb8 17. a3 {½-½ (40) Pavlovic,M (2475)-Markovic,M (2509) Kopaonik 2005 CBM 107 [Gofshtein,L]}) 12... Qb6 13. Na4 (13. Nb3 $11) 13... Qa7 (13... Qxd4 $17 14. Qxd4 Nxd4) 14. Bg2 Nxd4 15. Qxd4 Qxd4 16. Rxd4 Bc6 17. Nb6 Rd8 18. Rhd1 h4 19. Nc4 hxg3 20. hxg3 Rg8 21. R1d3 ({Much weaker is} 21. Nxd6+ Bxd6 22. Rxd6 Rxd6 $17) 21... f5 {aiming for ...Bxe4.} 22. Na5 $1 Bxe4 23. Bxe4 fxe4 24. Rxe4 d5 25. Re2 b6 26. Nc6 Rc8 27. Nd4 Bc5 28. f5 Bxd4 29. Rxd4 $11 {[%mdl 4096] Endgame KRR-KRR} Kd7 30. fxe6+ fxe6 31. Rd3 Kd6 32. Rde3 Rg6 33. Rb3 Rc6 34. Rbe3 b5 35. Kd2 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 36. Re5 Rc4 37. R2e3 Rcg4 38. a3 a4 39. c3 Rh6 ({Reject} 39... Rxg3 $6 40. Rxe6+ $1 {[%mdl 512]} Rxe6 41. Rxg3 $11) 40. Ke2 $2 {[#] This move loses the game for White.} (40. b3 $17) 40... Rxg3 $1 $19 {[%mdl 512]} 41. Rxd5+ $2 (41. Rxg3 {is the only way for White.} Kxe5 42. Kd1) 41... Kxd5 {Black is clearly winning.} ({Not} 41... exd5 42. Rxg3 Rh2+ 43. Kd3 $17) 42. Rxg3 {KR-KR} Rh2+ 43. Kd3 Rxb2 44. Rg8 {[#]} Rb3 $1 {[%cal Rb3a3]} 45. Rd8+ Kc6 46. Rc8+ Kd6 47. Rb8 Kc7 48. Re8 Rxa3 49. Rxe6 (49. Kd4 $142 Kd7 50. Ra8) 49... b4 $1 {[%cal Bb5b4,Bb4b3,Bb3b2][%mdl 32]} 50. Kc4 {[#]} b3 $1 {[%cal Rb3b2]} 51. Re1 b2 {Weighted Error Value: White=0.52/Black=0.09} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.2"]
[White "Wu, Derek"]
[Black "Paul, Justin"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "2106"]
[BlackElo "2267"]
[Annotator "TA"]
[PlyCount "153"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,153,-5,10,-14,-26,-25,-10,-47,-46,-49,-33,-58,-66,-111,-108,-105,-99,-106,-104,-95,-86,-90,-76,-79,-71,-73,-53,-57,-53,-58,-45,-165,-131,-180,-140,-146,-137,-139,-141,-158,-106,-128,-133,-154,-74,-120,0,0,0,0,0,0,12,18,13,0,0,0,45,53,45,45,45,45,53,0,72,58,87,107,216,191,178,176,398,269,447,461,466,466,461,452,529,531,518,515,491,407,674,673,665,620,648,491,483,479,427,337,533,560,525,545,605,597,689,688,671,659,717,679,4134,4134,1315,860,856,721,29973,1310,1129,855,29995,29981,29987,29977,29977,29978,29978,29971,29971,29972,29971,29973,29973,29974,29974,29975,29975,29976,29977,29978,29977,29978,29978,29979,29983,29984]} 1. d4 Nf6 2. Bg5 d5 3. Nd2 e6 4. e3 c5 5. c3 Nc6 6. f4 {D00: 1 d4 d5: Unusual lines.} Qb6 7. Rb1 Ne4 8. Nxe4 {The position is equal.} dxe4 9. d5 Ne7 {[#]} 10. dxe6 $146 ({Predecessor:} 10. Bc4 f6 11. Bh4 exd5 12. Bxd5 Nxd5 13. Qxd5 Qe6 14. Qh5+ g6 15. Qd1 Bd7 16. Qb3 Qxb3 17. axb3 {½-½ (50) Buendgen,A (2214)-Schippers,M (2209) Netherlands 2014}) 10... Bxe6 11. Qa4+ Bd7 $1 {[%cal Rd7a4]} 12. Qc2 f6 13. Bh4 O-O-O 14. Bc4 Be6 15. Bxe6+ Qxe6 16. Ne2 Nf5 17. Bf2 Rd3 18. O-O Be7 19. Rbd1 Rhd8 20. c4 (20. Nc1 $1 $15 Rxd1 21. Rxd1) 20... R8d6 21. Qa4 Rxd1 ({Resist} 21... Nxe3 22. Bxe3 Rxe3 23. Nc3 $15) 22. Rxd1 Qxc4 23. Qe8+ {[#]} (23. Qxc4 $2 {too greedy.} Rxd1+ 24. Be1 Rxe1+ 25. Kf2 Rf1+ $1 {[%mdl 512]} 26. Kxf1 Nxe3+ 27. Kf2 Nxc4 $19) 23... Bd8 $1 24. Re1 Ne7 ({Don't take} 24... Qxa2 25. Qxe4 g6 26. Qc2 $15) (24... Rd2 $142 25. b3 Qd5) 25. f5 Nxf5 26. Qh5 g5 (26... Nh6 $142 27. Bg3 Rd2) 27. Rc1 Ng7 ({Black should play} 27... Qxa2 $17 28. Qxh7 Qd5) 28. Qh3+ $11 Qe6 29. Qxh7 Qd7 {Threatens to win with ...Rd1+.} 30. Rxc5+ Rc6 31. Rxc6+ bxc6 32. Nc3 f5 33. Qg6 Ba5 {Strongly threatening ...Bxc3.} 34. h3 Bd8 $1 35. Bg3 Ne8 36. Be5 Nc7 $1 37. Bd4 (37. Kf2 $14) 37... Qe6 (37... Nd5 $11) 38. Qh7 $16 Bf6 39. Ne2 c5 (39... Nd5 $16 {was necessary.}) 40. Bxc5 Bxb2 41. Bxa7 $40 {[%mdl 128] Black is in trouble.} Qa6 $2 (41... Nd5 {is a better defense.} 42. Ng3 Ne7) 42. Qg8+ {[%mdl 64] Double Attack} Kb7 $2 (42... Kd7) 43. Qb8+ $18 Kc6 44. Qxb2 Qxa7 45. Nd4+ Kd7 46. Nxf5 Ke6 47. Nd4+ Kd7 48. Qb3 Qa6 (48... Qc5 $142 49. Qf7+ Kc8) 49. Qf7+ Kc8 50. Qf5+ Kb8 51. Qxe4 Qxa2 52. Nc6+ Kc8 53. Qf5+ Kb7 (53... Qe6 $142 54. Qf8+ Qe8) 54. Nd8+ Kb8 55. Qxg5 Qc4 56. Qf4 Qc1+ 57. Kh2 Kc8 58. Nf7 Ne6 59. Qe5 Nc5 60. Nd6+ Kd7 61. Ne4 Nb7 62. Qd4+ Ke8 63. Nf6+ (63. Qg7 $142 Qc6 {[#]} 64. Qxb7 $3 {[%mdl 512]} Qg6 65. h4 Qh6 66. Qb8+ Kf7 67. Nd6+ Kg6 68. Qg8+ Kf6 69. Qd8+ Ke6 70. Qc8+ Kf6 71. Qd8+ Ke6 72. Ne4) 63... Kf7 64. Qd7+ Kf8 65. Nh7+ {White mates.} Kg8 66. Qxb7 Qxe3 67. Nf6+ Kf8 68. Qf3 Qe5+ 69. Kg1 Qd4+ 70. Qf2 Qa1+ 71. Qf1 Qd4+ 72. Kh1 Ke7 73. Ng4 Qb4 74. Qf6+ Ke8 75. Kh2 Qd2 76. Qe6+ Kf8 77. Qh6+ {Quite a comeback for White. Accuracy: White = 69%, Black = 50%.} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.3"]
[White "Chasin, Nico"]
[Black "Vivekananthan, Anish"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "2303"]
[BlackElo "2305"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,111,17,23,7,7,-23,-27,-59,22,0,0,0,0,0,27,27,31,-26,8,2,2,7,0,5,20,20,30,22,23,27,35,0,31,0,22,29,28,26,19,37,35,19,20,-12,-6,-54,27,14,22,11,61,78,83,60,95,40,86,79,70,69,133,137,129,127,139,79,63,0,0,0,53,57,102,104,113,104,131,75,207,92,149,95,141,100,100,101,104,104,100,105,148,139,230,163,325,334,311,297,676,450,416,351]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. h3 g6 7. Qc2 {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack.} Bg7 8. Bf4 O-O 9. Nf3 {Black has an edge.} Bd7 (9... Nh5 $15 10. Bh2 Bh6) 10. Nbd2 Rc8 {[#]} 11. Qb3 $146 ({Predecessor:} 11. Qb1 Na5 12. Ne5 Qb6 13. a4 Bf5 14. O-O Bxd3 15. Nxd3 Nd7 16. Re1 e6 17. Nf3 {0-1 (37) Garro Beraza,H (1918)-Juez Villar,E (1782) Eibar 2007}) 11... Na5 12. Qb4 b6 13. Ba6 Ra8 14. Qa3 (14. O-O $14) 14... Bc8 15. Bb5 a6 {...Nh5 is the strong threat.} 16. Be2 Bb7 17. O-O Nc4 18. Qb3 Nd6 19. Ne5 Rc8 20. Rfe1 Re8 21. Bf3 Bf8 22. g4 Bg7 23. g5 Nfe4 24. Nxe4 dxe4 25. Bg2 Rf8 26. Ng4 Kh8 27. d5 Rc5 28. Ne3 b5 (28... e5 $15 29. Bg3 Nf5) 29. Rad1 a5 30. a4 Qd7 31. axb5 Rxb5 32. Qa4 Rd8 33. Rd2 (33. c4 $16 Rc5 34. Qxd7 Rxd7 35. b3) 33... Kg8 34. Bxd6 exd6 35. Qxe4 h5 (35... Re8 $14 36. Qa4 Bc8) 36. gxh6 $1 $16 Bxh6 37. Qh4 Bg7 38. Rde2 (38. Bf1 $142 Rb3 39. Ng4) 38... Re8 39. Qa4 ({Better is} 39. Bf3 $14) 39... Bc8 $1 $11 40. Qf4 Be5 ({Black should try} 40... Ba6 $11) 41. Qh4 $36 {[%mdl 2048] Threatens to win with Ng4. White is pushing.} Qd8 42. Qxd8 Rxd8 {[#]} 43. Nc4 $1 Kf8 44. Ra1 (44. Nxe5 $142 dxe5 45. Ra1 (45. Rxe5 Rxb2 46. Ra1 Rc2 $16)) 44... Bf4 (44... Bf5 $16 {was called for.}) 45. Rxa5 (45. Nxa5 $18 {and the rest is easy.} Kg7 46. c4) 45... Bd7 (45... Rxa5 $142 46. Nxa5 Bf5) 46. Re4 (46. b4 $142) 46... g5 47. Rxb5 Bxb5 48. Ne3 Ra8 49. Bf3 Ra1+ 50. Kg2 f5 {[#]} 51. Rb4 $1 {[%cal Rb4b5]} Bd7 (51... Bd3 $16 {was worth a try.} 52. Rd4 Bxe3 53. fxe3 Bc2) 52. Rb7 Ke8 $2 (52... Bxe3 {is a better defense.} 53. Rxd7 Bf4) 53. Nc2 $18 Rb1 54. Nd4 {aiming for Nc6.} Be5 $2 (54... g4 55. hxg4 fxg4) 55. Bh5+ Kd8 56. Ne6+ {Weighted Error Value: White=0.22/Black=0.36} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.4"]
[White "Park, Evan"]
[Black "Sheng, Joshua"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "2173"]
[BlackElo "2474"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,63,18,17,20,52,29,23,12,18,16,17,18,39,36,45,11,49,34,50,38,33,0,0,0,0,0,59,34,68,62,45,0,59,47,52,38,36,38,321,311,318,310,321,324,422,417,389,403,392,402]} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bd6 7. Bd3 O-O 8. Ne2 Re8 9. Qc2 {B15: Caro-Kann: 3 Nc3: 3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6.} h5 {The main line 9...h5 scores better than 9...h6.} 10. Be3 (10. O-O {looks sharper.} Qc7 11. h3 Be6 12. Bd2 Nd7 13. c4) 10... Be6 11. O-O-O {White has an edge.} Nd7 12. c4 Rc8 13. Kb1 b5 14. c5 Bb8 15. Nf4 {[#]} Bg4 $146 (15... Bxf4 $5 16. Bxf4 (16. Bh7+ Kh8 $17) 16... Nf8 $14) ({Predecessor:} 15... Bxf4 16. Bxf4 Nf8 17. Bd6 Bd5 18. f3 g6 19. Rhe1 f5 20. Qd2 Qh4 21. Be5 Nd7 {½-½ (52) Abrahamyan,T (2358)-Gunina,V (2431) chess.com INT 2020}) 16. Rd2 Bxf4 17. Bxf4 Be6 18. f3 Nf8 19. Bd6 Qa5 20. b3 Bd5 (20... Ng6 $11) 21. Bf5 Rcd8 22. Rhd1 $36 {[%mdl 2048] White has good play.} Re3 23. Rd3 Rde8 (23... Ree8 $11) 24. Rxe3 $14 Rxe3 25. Be4 {Threatens to win with Bxd5.} Rc3 26. Qb2 $1 {And now Bxd5 would win.} Ne6 $2 {[%mdl 8192] Loses the game.} (26... Bxe4+ $14 27. fxe4 Ne6) 27. Bxd5 $18 cxd5 {[#]} 28. Bg3 $1 b4 {[#]} 29. Be1 $1 Nc7 30. Bxc3 bxc3 31. b4 Qa4 32. Qb3 {Weighted Error Value: White=0.08/Black=0.40} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.5"]
[White "Fishbein, Mitch"]
[Black "Sandoval Mercado, Carlos"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "2132"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,86,51,54,54,58,19,56,0,8,18,31,0,6,-18,-23,-33,-25,-16,-3,0,0,-10,-12,-18,12,6,12,20,41,14,24,27,35,31,81,0,79,83,93,41,49,43,72,58,70,41,50,0,0,0,0,0,0,0,129,-92,-101,-100,-103,-1444,-1342,-29992,-29993,-29992,0,0,691]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6 7. O-O e5 8. Re1 Qe8 9. Bf1 Bg4 10. d5 Nb4 11. Be2 a5 12. h3 {E94: King's Indian: Classical: 6 Be2 e5 7 0-0: Various Black 7th moves.} Bd7 13. Bf1 {[#]} Kh8 $146 ({Predecessor:} 13... Na6 14. Be3 {½-½ (14) Valle,A (2250)-Librelato,K (2187) Brasilia 2019}) 14. g3 (14. b3 $14) 14... Ng8 15. Bg2 f5 16. exf5 gxf5 17. Ng5 h6 18. Ne6 Bxe6 19. dxe6 Rb8 20. Nd5 Na6 21. Bd2 b6 22. Bc3 c6 23. Ne3 Qxe6 24. Bxc6 Nc5 25. Bg2 Qg6 26. Nd5 Rf7 27. Bf3 Rff8 28. Bg2 ({White should try} 28. Qc2 $16) 28... Qf7 (28... Rf7 $11 {remains equal.}) 29. Qc2 $16 Ne7 30. Nxe7 (30. Rad1 $16) 30... Qxe7 $14 31. Rad1 Rbd8 32. b3 Qf7 33. Qe2 e4 34. Bxg7+ (34. Qe3 $5 {[%cal Re3h6]}) 34... Qxg7 35. Rd5 f4 {[#] White must now prevent ...f3.} 36. Qg4 Qc3 37. Red1 e3 (37... Rf6 $11) 38. fxe3 $2 (38. gxf4 $16 exf2+ 39. Kh2) 38... Qxe3+ $17 {[%mdl 64] [#] Double Attack} 39. Kh2 f3 40. Bf1 $2 {[%mdl 8192]} (40. Qg6 $17 fxg2 41. Rf5) 40... Ne4 $19 41. R5d3 Qf2+ {[%mdl 64] Double Attack} 42. Kh1 Nc5 $2 (42... Nxg3+ {mates} 43. Qxg3 Qxg3 44. Rxd6 Rxd6 45. Rxd6 Qxd6 46. h4 Qg3 47. h5 Rg8 48. Bd3 Qh4#) 43. Rd5 {Hoping for Qg6.} Ne4 $2 {[%mdl 40960] Weighted Error Value: White=0.52/Black=0.39. Loss on time!?} ({Wrong is} 43... Qxa2 $2 44. Qg6 $18) (43... Rf6 $11) 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.6"]
[White "Asaria, Danial"]
[Black "Singh, Hersh"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2284"]
[BlackElo "2112"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,83,18,7,33,38,42,52,67,70,72,60,146,120,135,120,114,0,70,70,75,60,144,147,154,141,134,144,204,158,199,122,122,113,150,71,71,31,66,0,56,41,120,110,115,58,58,25,71,39,245,205,474,473,666,673,760,748,731,664,645,652,636,635,805,789,1106,1060,29970,12261]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 Be7 7. Bd3 Nbd7 {[%cal Bb8d7,Bd7f8,Bf8e6][%mdl 32] The main line 7...Nbd7 scores better than 7...0-0.} 8. Nf3 Nf8 9. O-O Ne6 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2).} 10. Bh4 O-O 11. b4 {[#]} Bxb4 $146 {[#]White is slightly better.} ({Predecessor:} 11... b6 12. Qb3 Bb7 13. a4 Rb8 14. Bf5 g6 15. Bxe6 fxe6 16. Rfc1 Ba8 17. Bg3 Bd6 {1-0 (35) Ghaem Maghami,E (2552)-Mousavi,S (2501) Teheran 2019}) 12. Bxh7+ $1 {[%mdl 512]} Kh8 (12... Nxh7 13. Bxd8) 13. Bc2 Be7 (13... g6 $14) 14. Ne5 $16 {Strongly threatening Bxf6.} g6 15. f4 {aiming for f5.} Ng7 16. g4 ({Better is} 16. Rb1 $16) 16... Nd7 (16... Nxg4 $11 17. Bxe7 Qxe7) 17. Be1 $36 {[%mdl 2048] White has good play.} Nxe5 18. dxe5 f5 (18... Bh4 $1 $14) 19. exf6 $1 $16 Rxf6 20. Qf3 Qd7 {[#]} 21. h3 $1 Qe8 (21... b5 $16) 22. Ne2 Rf8 23. e4 (23. Qg3 $18) 23... dxe4 24. Bxe4 Be6 25. Rb1 (25. Bc3 $142) 25... Qf7 26. Kh1 (26. Bc3 {feels hotter.} Rae8 27. Qf2 b6 28. Bxc6 Rc8 29. Qf3) 26... Bf6 27. Bc3 (27. Bb4 $14) 27... Bxc3 (27... Rae8 $11) 28. Nxc3 $14 (28. Qxc3 Bxa2 29. Rbd1 Rae8 $15) 28... Rad8 (28... Bc4 $14) 29. Qg3 $16 Kg8 30. Rf2 (30. f5 $16 Bc4 31. Rf3 (31. fxg6 Qxf1+ 32. Rxf1 Rxf1+ 33. Kh2 Rd2+ 34. Bg2 Bd3 $11)) 30... Bc4 $1 $14 31. Rbb2 Rd4 32. f5 g5 $2 {This move loses the game for Black.} (32... Qe7 $14) 33. Qe5 Rd7 $2 {[#]} (33... Qf6 34. Qxf6 Rxf6 35. Rxb7 Ne6) 34. f6 $1 $18 {[%mdl 64] Discovered Attack} Re8 (34... Ne6 $142 35. Rb4 Bd3) 35. Qxg5 {[%mdl 64] Pin} Rxe4 36. Nxe4 Qd5 37. Qxd5+ Bxd5 38. Rbe2 Ne6 39. Kh2 Nd4 40. Re3 b5 41. Ng5 {[%cal Re3e8]} Bf7 42. Re7 {Weighted Error Value: White=0.22/Black=0.65} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.7"]
[White "Quiroga Jaquez, Angel Ivan"]
[Black "Oberoi, Shelev"]
[Result "1-0"]
[ECO "A06"]
[WhiteElo "2178"]
[BlackElo "2133"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,111,8,17,8,22,19,22,21,27,20,19,21,30,0,0,0,2,0,0,-31,-24,-52,-8,-10,-7,-8,-13,-12,27,-12,-14,-12,21,-18,37,44,30,51,126,129,117,30,192,226,207,195,340,360,288,144,119,0,0,-21,-30,-24,-6,-32,0,0,61,0,0,0,0,0,0,0,1069,614,949,0,0,-196,0,0,12833,12834,3061,1177,0,0,12836,0,0,0,29990,29991,29992,29993,29993,29994,29994,29993,29993,29994,29994,29995,29995,29996,29997,29997,29998,29999]} 1. Nf3 Nf6 2. b3 d5 3. Bb2 Bf5 4. e3 h6 5. d4 e6 6. Bd3 {A06: Réti Opening: 1 Nf3 d5.} Ne4 7. O-O Nd7 {[%cal Bb8d7,Bd7f6,Bf6e4][%mdl 32]} 8. c4 {The position is equal.} c6 9. Qc2 Bd6 10. Nc3 Ndf6 {[#]} 11. h3 $146 ({Predecessor:} 11. Ne5 Nxc3 12. Bxc3 Bxd3 13. Qxd3 O-O 14. Rad1 Qc7 15. Bb2 Rad8 16. Qe2 Rfe8 17. Kh1 {½-½ (95) Ageichenko,G (2407)-Kosintseva,T (2475) Moscow 2005}) 11... Nxc3 12. Bxc3 Ne4 13. Bb2 O-O 14. Nd2 {[%cal Rd2e4]} Qh4 15. f4 {[%cal Rd2e4]} Qg3 16. Rf3 Qg6 {aiming for ...Nxd2.} 17. Bxe4 dxe4 18. Rf2 Qg3 19. Re1 (19. Nf1 $5 {[%cal Rf1g3]} Qh4 20. Nd2 $11) 19... h5 20. Nf1 (20. Nxe4 $2 Qg6 $19) 20... Qh4 21. g4 Bh7 (21... hxg4 $11 22. hxg4 Bxg4 23. Qxe4 Bh3) 22. Ree2 $14 (22. c5 Bxf4 23. Rxf4 (23. exf4 $2 e3 $19 {[%mdl 64] Discovered Attack}) 23... Qxe1 $15) 22... f6 (22... Qxh3 $2 23. Rh2 $18) (22... hxg4 23. hxg4 Bg6 24. Rh2 $16) 23. Rg2 e5 (23... Qxh3 $2 24. Rg3 $18) (23... g5 $14) 24. dxe5 $16 fxe5 25. gxh5 (25. Bxe5 Bxe5 26. fxe5 Rf3 $15) (25. f5 $16) 25... Qxh3 $2 (25... Bf5 $1 $11) 26. c5 $18 (26. Bxe5 Bxe5 27. Rg3 Qh4 $11) 26... Bc7 27. Qc4+ (27. Bxe5 Bxe5 28. Rg3 Qh4 $11) 27... Kh8 (27... Rf7 {is a better defense.} 28. Rg3 (28. Bxe5 Bxe5 29. Rg3 Qd7 $16) 28... Qd7) 28. Rg3 Qd7 29. h6 ({Worse is} 29. Bxe5 Bxe5 30. fxe5 Qd1 $11) (29. Rd2 $18 Qe8 30. Rdg2) 29... gxh6 $16 30. fxe5 (30. Rd2 $16 Qf5 31. Rgg2) 30... Qf5 $1 $11 {[%csl LRe5,LRf1][%mdl 64] Double Attack} 31. e6+ Be5 32. Bxe5+ Qxe5 33. Reg2 Rad8 {White must now prevent ...Rd1.} 34. Rg7 {Threatens to win with e7!} Rd1 ({Not} 34... Qxg7 $2 35. Rxg7 Kxg7 36. e7 $18) ({Black should try} 34... Rde8 $11) 35. e7 $40 {[%mdl 128] White attacks.} ({White should play} 35. Rf7 $14 Rxf7 36. exf7) 35... Rdxf1+ 36. Qxf1 Rxf1+ 37. Kxf1 Qe6 38. b4 {Kg1 is the strong threat.} h5 $2 {[%mdl 8192]} (38... Qe5 $11 39. Kg1 Qh5) 39. Kg1 $1 $18 h4 40. Kh2 $2 ({White must play} 40. R2g5 $18 {And now a4 would win.} a6 41. Rg2) 40... Qe5+ (40... h3 $5 {[%cal Rh3g2]} 41. R2g5 b6 42. cxb6 axb6 $11) 41. Kh3 $2 (41. Kg1 $11 Qe6 42. R2g5) 41... Qe6+ $2 (41... Bf5+ $1 $19 42. Kxh4 Bd7) 42. Kh2 $11 a6 $2 {[%mdl 8192]} (42... h3 $11 43. R2g5 Qxa2+ 44. Kxh3 Qe6+ 45. Kh4 b6 46. e8=Q+ Qxe8 47. Rxa7 Qf8 48. cxb6 Qh6+ 49. Kg4 Qf8) 43. R2g5 $18 Qxa2+ 44. Kh3 (44. Kh1 $142 Qe6 45. Kg1) 44... Qe6+ 45. Kxh4 {[#]} Qh6+ $2 {[%mdl 8192]} (45... b6 $1 $11 46. cxb6 Qh6+ {[%mdl 64] Double Attack} 47. Rh5 Qf6+ 48. Rhg5 Qh6+ 49. Kg4 Qe6+ 50. Kg3 Qd6+ {[%mdl 64] Double Attack} 51. Kh4 Qh6+ {[%mdl 64] Double Attack}) 46. Kg4 $2 (46. Kg3 $18 Qe6 47. Kg2 Qa2+ 48. Kh1 Qa1+ 49. Kh2 Qa2+ 50. Rg2) 46... Qe6+ $11 47. Kg3 {[#]} Qd7 $2 {[%mdl 8192]} (47... b6 $1 $11 48. cxb6 Qd6+ {[%mdl 64] Double Attack} 49. Kg2 Qd2+ {[%mdl 64] Double Attack} 50. Kh1 Qd1+ 51. Kg2 Qf3+ 52. Kh2 Qe2+ 53. Rg2 Qh5+ 54. Kg1 Qd1+ 55. Kf2 Qd2+ 56. Kf1 Qd1+ 57. Kf2 Qf3+ 58. Kg1 Qd1+ 59. Kh2 Qh5+ 60. Kg1 Qd1+) 48. Rf7 {White mates.} Qc7+ 49. Kg2 Qd7 50. Rf8+ Bg8 51. Rfxg8+ Kh7 52. e8=Q {[%csl Ge8][%cal Rg8h8]} Qd2+ 53. Kh1 {[%csl Ge8][%cal Rg8h8]} Qe1+ 54. Rg1 {[%csl Ge8][%cal Rg8h8]} Qh4+ 55. Kg2 {[%csl Gg8][%cal Re8g6]} Qg3+ 56. Rxg3 {Weighted Error Value: White=0.54/Black=0.40} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.8"]
[White "Chen, Ryo"]
[Black "Tello Chavez, Isaac Valent"]
[Result "1-0"]
[ECO "B19"]
[WhiteElo "2165"]
[BlackElo "2275"]
[Annotator "TA"]
[PlyCount "49"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,49,25,22,27,24,24,12,18,19,43,20,22,11,22,0,19,13,16,8,7,-1,-2,-29,15,16,0,11,11,10,566,559,550,545]} 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 e6 8. Ne5 Bh7 9. Bd3 Bxd3 10. Qxd3 Nd7 {B19: Classical Caro-Kann: 4...Bf5 main line.} 11. Bf4 Qa5+ 12. c3 Ngf6 {The position is equal. now scores much better than the old 12...Nxe5.} 13. Nc4 Qd5 14. Qe2 {[#]} Nb6 $146 ({Predecessor:} 14... Be7 15. O-O O-O 16. Rfd1 Rfd8 17. b4 Nb6 18. Ne5 Qb5 19. Qf3 a5 20. Bxh6 Qd5 21. bxa5 {½-½ (34) Iordachescu,V (2560)-Svetushkin,D (2486) Minsk 2000}) 15. Ne5 Qb5 16. Qc2 Qa6 17. Ne4 Nbd5 18. Bd2 Rd8 19. Nc5 Bxc5 20. dxc5 Nd7 21. Nxd7 Rxd7 ({Don't play} 21... Kxd7 22. c4 $16) 22. c4 {[#] Black must now prevent Rh3.} Ne7 23. Rh3 {aiming for Ra3.} Nf5 $2 {[%mdl 8192]} (23... b6 $11 {and Black has nothing to worry.}) 24. Ra3 $18 Nd4 25. Qc3 {Weighted Error Value: White=0.06/Black=0.59} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.9"]
[White "Wu, Rochelle"]
[Black "Stearman, Josiah"]
[Result "0-1"]
[ECO "E36"]
[WhiteElo "2029"]
[BlackElo "2391"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,64,0,4,36,27,21,8,14,18,20,11,17,0,46,13,47,39,43,46,41,25,25,28,69,47,91,19,22,8,20,20,17,23,69,73,58,-120,-120,-158,-156,-155,-155,-154,-135,-200,-200,-198,-200,-260,-242,-1198,-1133,-5406,-5406]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 d5 7. Bg5 h6 {E36: Nimzo-Indian: Classical: 4...d5 5 a3.} 8. Bxf6 Qxf6 9. e3 c6 {The position is equal.} 10. Nf3 Nd7 11. Be2 dxc4 12. Bxc4 {[#]} b5 $146 ({Predecessor:} 12... b6 13. O-O Bb7 14. Rac1 Rfd8 15. b4 c5 16. dxc5 bxc5 17. Qxf6 gxf6 18. b5 Nb6 {½-½ (94) Rasulov,V (2478)-Le,Q (2709) chess.com INT 2020}) 13. Bd3 Bb7 (13... c5 $5) 14. Be4 a5 15. O-O Qe7 16. Rfc1 Rfc8 17. Nd2 e5 18. dxe5 (18. a4 {seems wilder.} exd4 19. exd4 bxa4 20. Rxa4 Nb6 21. Raa1) 18... b4 19. Qb3 (19. Qc2 $16) 19... Nxe5 $11 20. axb4 axb4 21. Rxa8 Rxa8 22. h3 Ra7 23. Qc2 $1 Ba6 24. f4 $2 {[#]} ({Avoid the trap} 24. Bxc6 $2 Rc7 $19) (24. Nb3 $1 $14 {stays ahead.}) 24... Nd3 $1 $17 {[%cal Rd3c1]} 25. Ra1 Bb5 26. Rxa7 Qxa7 27. Nf1 Nxf4 $1 28. Bxc6 (28. Kf2 $17) 28... Bxf1 $1 $19 29. Kxf1 Qxe3 {[#] And now ...Nd3 would win.} 30. Be4 {[%cal Rc2c8]} g6 {Hoping for ...Nh5.} 31. Qc8+ $2 (31. Bf3) 31... Kg7 {( -> ...Qe2+)} 32. Qc4 Nh5 {Accuracy: White = 52%, Black = 70%.} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.21"]
[Round "5.10"]
[White "Tsay, Vincent"]
[Black "Shevkunov, Vladyslav"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "2266"]
[BlackElo "1945"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,77,-4,0,0,66,66,54,59,57,50,48,27,25,4,15,27,10,12,23,17,20,3,15,14,28,24,35,40,43,-2,55,55,47,47,50,45,43,27,47,53,63,64,204,223,213,208,216,219,224,215,254,214,249,245,263,256,252,273,637,636,627,627,620,617,596,567,583,575,710,668]} 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. c3 Nc6 5. Nd2 Bf5 6. Qb3 {D00: 1 d4 d5: Unusual lines.} Qb6 (6... Qd7 $11) 7. dxc5 $14 Qxb3 8. axb3 {[%cal Ba2b3,Bb3b4,Bb4b5][%mdl 32] White is slightly better.} e5 9. Bg3 Bxc5 10. b4 {10.Ngf3 injects fresh life into this line.} Bd6 11. b5 Ne7 12. Ngf3 Nd7 13. Be2 f6 14. O-O {[#]} g5 $146 ({Predecessor:} 14... O-O 15. Rfd1 Bc2 16. Rdc1 Bg6 17. Rd1 Bc2 18. Rdc1 Bg6 19. c4 Bf7 20. cxd5 Nxd5 {½-½ (56) Kosic,D (2488)-Skoberne,J (2492) Novi Sad 2009}) 15. Ne1 Bg6 16. f3 Bc5 17. Bf2 Nf5 18. Nc2 $1 Nd6 19. Rac1 Bxc2 (19... Ke7 $11) 20. Rxc2 Nf5 $1 21. e4 Ne3 22. Bxe3 Bxe3+ 23. Kh1 Bxd2 24. Rxd2 dxe4 25. fxe4 {Hoping for Bg4.} Nc5 {This move loses the game for Black.} ({Better is} 25... Ke7 $14) 26. Rd5 $18 (26. Rxf6 Rd8) 26... Nd7 27. Bg4 Nb6 {[#] Threatens to win with ...h5.} 28. Rd6 ({Stronger than} 28. Rxf6 Nxd5 29. exd5 h5 $15) 28... O-O 29. h3 ({Much less strong is} 29. Rdxf6 $6 Rxf6 30. Rxf6 Rf8 $16) 29... Kg7 30. Rfd1 Rf7 31. b3 Rc7 32. c4 Re8 33. Ra1 Nc8 $2 {[#]} (33... Rce7 34. Rxa7 Nc8 35. Bxc8 Rxc8) 34. Rd7+ {White is clearly winning.} Re7 35. Rxc7 Rxc7 36. Bxc8 Rxc8 37. Rxa7 f5 38. Rxb7+ Kf6 39. Rb6+ {Weighted Error Value: White=0.05/Black=0.31} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.1"]
[White "Liang, Jason"]
[Black "Wu, Derek"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "2317"]
[BlackElo "2106"]
[Annotator "TA"]
[PlyCount "250"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,250,0,14,0,8,1,14,0,12,0,0,13,37,13,16,-40,-51,-36,-44,-34,-38,-36,51,25,110,102,103,60,86,71,85,47,35,45,44,52,49,47,49,0,0,0,0,0,0,-28,-19,-29,-25,-14,-2,-26,-31,-74,-75,-69,-38,-77,-52,-99,-48,-61,-56,-82,-72,-106,-107,-122,-117,-137,-136,-153,-145,-144,-126,-372,-107,-296,-279,-376,-394,-295,-66,-100,-45,-46,-45,-46,-43,-39,-39,-39,-42,-39,-39,-43,-45,-54,-8,-8,-8,-8,-8,-8,-8,-8,-7,-8,-8,-8,-8,-30,-8,-8,-8,-8,-8,-8,-8,-8,-8,-14,-8,-8,-8,-8,-8,-8,-8,-14,-8,-69,-67,-43,-8,-8,-8,-29982,-29983,-29982,-80,-80,-80,-80,-80,-80,-80,-80,-80,-80,-77,-77,-77,-77,-77,-77,-77,-77,-77,-80,-70,-70,-69,-69,-69,-69,-69,-69,-8,-8,-8,-8,-8,-8,-8,-8,-8,-29986,-29987,-29990,-29979,-29978,-29980,-29988,-69,-69,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,0,0,0,0,0,0,0,0,0,-8,0,-8,0,0,0,0,0,0,0,-8,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nc3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Qd2 g6 6. b3 {B23: Closed Sicilian: Lines without g3.} Bh6 7. f4 Nf6 8. Bb2 O-O 9. O-O-O e5 10. g3 Nd4 11. Kb1 b5 {[#]} 12. Nxb5 $146 ({Better is} 12. Bg2 $11) ({Predecessor:} 12. Bg2 Bb7 13. Nge2 b4 14. Na4 Nxe4 15. Bxe4 Bxe4 16. Nxd4 Bxh1 17. Rxh1 exd4 18. Qxd4 {0-1 (99) Morozevich,A (2659)-Zakhartsov,V (2519) Skolkovo 2019}) 12... Nxb5 $15 13. Bxb5 Bb7 14. Ne2 Nxe4 15. Qe3 $1 Qe7 (15... Qa5 $15 16. a4 a6) 16. Rhe1 Rac8 (16... d5 $11) 17. Bd3 $16 Nc5 18. Bc4 Na4 19. Ba3 $1 {[%cal Ra3d6]} ({But not} 19. bxa4 Rxc4 20. Qa3 Bg7 $17) (19. Qxa7 $2 Nxb2 20. Kxb2 Ra8 $19) 19... Rfd8 20. Qxe5 (20. Qxa7 {feels hotter.} Ra8 21. Qf2 Bg7 22. Bb4 Rac8 23. fxe5 Rxc4 24. bxc4 Qxe5 25. Nd4) 20... Qxe5 21. fxe5 Nb6 22. exd6 Nxc4 23. bxc4 Rxc4 24. d7 Bc6 25. Nc1 {aiming for Nb3.} Bf8 ({Reject} 25... Bxd7 $6 26. Rxd7 $1 {[%mdl 512]} Rxd7 27. Re8+ Kg7 28. Bf8+ Kf6 29. Bxh6 $16) ({Not} 25... Rxd7 $2 26. Re8+ Bf8 27. Rxd7 $18) 26. Bxf8 Kxf8 27. Nd3 Be4 28. Re2 $1 {Ne5 is the strong threat.} Rxd7 29. Nb2 $1 Rb7 {Black wants to play ...Rcb4.} 30. Kc1 Rcb4 31. c3 Rc7 32. Re3 {With the idea a3.} f5 33. Rd8+ Kg7 34. h4 Rb6 (34... Kh6 $17 35. Rd6 Kh5) 35. Rd4 Kf6 36. Ra4 h6 37. c4 Rcb7 38. Re2 g5 39. hxg5+ hxg5 {And now ...Rh7 would win.} 40. Rh2 Kg6 41. Ra5 Rd6 42. Re5 $2 (42. Ra4 $17 {was necessary.}) 42... g4 $2 (42... Ra6 $19 43. Rb5 Rxb5 44. cxb5 Ra3) 43. Re8 $2 (43. Ra5 $17 {was forced.}) 43... Ra6 $19 44. a4 Rab6 45. Reh8 {[#]} Rg7 $2 (45... f4 $1 $19 {[%mdl 512]} 46. R8h4 (46. gxf4 g3) 46... Kf5 47. Rh5+ Kf6 48. Rh6+ Kg7 49. Rxb6 Rxb6) 46. R2h6+ Kf7 (46... Kg5 $17 47. Rxb6 axb6) 47. Rxb6 $1 $15 axb6 {[%mdl 4096] Endgame KRB-KRN} 48. Nd1 {[#]} f4 $1 {[%mdl 512]} 49. gxf4 g3 50. Ne3 $1 g2 {[#]} 51. Nxg2 $1 {[%mdl 512]} Rxg2 {KRB-KR} (51... Bxg2 52. Rh6) 52. Rb8 Rc2+ 53. Kd1 Rxc4 {Threatens to win with ...Rc6.} 54. Rxb6 Rxa4 55. Kd2 Ra3 56. Ke2 Bf5 57. Kf2 Be6 58. Rb5 Kf6 59. Re5 Bg4 60. Kg2 Bf3+ 61. Kf2 {Cut Off at move 61} Ba8 62. Ke2 Bb7 63. Rc5 Ra4 64. Rc7 Bd5 65. Rc5 Ke6 66. f5+ Kd6 67. Rc8 Rf4 68. Rd8+ Ke5 69. Kd3 Rf3+ 70. Kc2 (70. Ke2 $11) 70... Kd4 71. Kd2 Rf2+ 72. Ke1 Rh2 {Hoping for ...Ke3.} 73. Re8 $2 {[%mdl 8192]} (73. Kf1 $11) 73... Be4 $1 74. Kd1 Kd3 $2 (74... Ke3 75. Kc1 Rc2+ 76. Kd1 Rc5 77. Re7 Rc8 78. f6 Rd8+ 79. Ke1 Rb8 80. Rxe4+ Kxe4 81. Kd2 Rf8 82. Kc3 Rxf6 83. Kc4 Rc6+ 84. Kb5 Kd5 85. Kb4 Kd4 86. Kb5 Rf6 87. Kb4 Rb6+ 88. Ka5 Kc5 89. Ka4 Kc4 90. Ka3 Rb7 91. Ka2 Kc3 92. Ka1 Kc2 93. Ka2 Ra7#) 75. Kc1 $17 Bxf5 76. Re5 Be4 77. Re8 Rc2+ 78. Kb1 Rc5 79. Rb8 Kc3+ 80. Kc1 Bd3 {White must now prevent ...Rh5.} 81. Rb2 Rh5 {[%cal Rh5h1]} 82. Rc2+ Kd4 83. Rb2 Ke3 {[%cal Rh5h1]} 84. Rg2 Rb5 {[%csl Gd3][%cal Rb5b1]} 85. Rg3+ Kd4 86. Kd2 Rb2+ 87. Ke1 Rh2 88. Rf3 Re2+ ({Black should play} 88... Be4 $15 89. Rf2 Rh3) 89. Kf1 $1 $11 Rb2+ 90. Kg1 Be4 91. Rf2 Rb1+ 92. Rf1 Rb6 93. Rf2 $2 {[%mdl 8192]} (93. Kh2 $11) 93... Ke3 94. Ra2 Rg6+ 95. Kh2 {[#]} Kf4 $1 96. Ra7 {[#]} Rg8 $2 (96... Rg2+ $1 {mates} 97. Kh3 Rd2 98. Rf7+ Bf5+ 99. Rxf5+ Kxf5 100. Kg3 Ke4 101. Kg4 Rg2+ 102. Kh4 Kf3 103. Kh5 Kf4 104. Kh6 Kf5 105. Kh7 Kf6 106. Kh8 Kf7 107. Kh7 Rh2#) 97. Rf7+ $15 Ke3 (97... Kg4 $15) 98. Kh3 $11 {The position is equal.} Bf3 99. Rf6 Kf2 100. Kh4 Rg1 101. Rf4 Ke3 102. Rf6 Ke4 103. Kh3 Rg7 104. Kh4 Bd1 105. Rd6 Bc2 106. Rd2 Bd3 107. Rf2 Bc4 108. Rf6 Ke5 109. Rf3 (109. Rb6 {seems wilder.} Rh7+ 110. Kg4 Bd5 111. Kg3 Rg7+ 112. Kf2) 109... Be6 110. Rg3 Rf7 111. Kg5 Rf5+ 112. Kh4 Kf4 113. Rg4+ Kf3 114. Rg3+ Kf2 {( -> ...Rf4+)} 115. Rg5 Rf6 116. Rg7 Kf3 117. Rg3+ Kf4 {[%cal Rf6h6]} 118. Rg4+ Ke5 (118... Ke3 {keeps more tension.} 119. Rg3+ Kd2 120. Rg5 Rf7 121. Rg2+ Kc3) 119. Rg5+ Bf5 120. Kg3 Ra6 121. Kf3 $1 Ra3+ 122. Ke2 Kf4 123. Rg7 Ra2+ 124. Kd1 Ke3 {[%cal Ra2a1]} 125. Rg3+ Kd4 {Weighted Error Value: White=0.21/Black=0.30} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.2"]
[White "Paul, Justin"]
[Black "Chasin, Nico"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "2267"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,81,18,16,2,17,17,16,16,11,-2,-9,-34,42,42,41,-20,-22,-39,-7,0,0,-26,66,59,68,75,70,78,81,69,81,68,76,68,73,58,143,157,218,0,0,0,0,0,150,147,156,146,137,142,303,0,-22,-1246,-1121,-1091,-1126,-29984,-29985,-29985,-29986,-29990,-29987,-29987,-29988,-29992,-29993,-29993,-29994,-29994,-29995,-29999]} 1. e4 c5 2. Nf3 e6 3. b3 Nf6 4. e5 Nd5 5. c4 Ne7 6. Bb2 Nbc6 7. Bd3 {B40: Sicilian: 2...e6, Unusual lines.} d5 8. exd6 Qxd6 9. Be4 {The position is equal.} e5 {[#]} 10. O-O $146 ({Predecessor:} 10. Qe2 f6 11. Nc3 Be6 12. Qd3 Qxd3 13. Bxd3 O-O-O 14. Bc2 Nb4 15. O-O-O Nxc2 16. Kxc2 {0-1 (35) Van Zandwijk,J (2264)-Janssen,R (2437) Vlissingen 2001}) 10... f6 11. Nc3 Bg4 (11... Be6 $1 $15) 12. h3 $14 Be6 13. Nb5 (13. Ba3 $14) 13... Qd7 $11 14. Ne1 a6 15. Nc3 f5 16. Bf3 b6 (16... O-O-O $11) 17. Na4 $14 Rb8 18. Qe2 $1 Qd6 19. Rc1 Nd4 20. Bxd4 Qxd4 21. Nc2 Qd6 $1 22. Rfe1 $36 {[%mdl 2048] White has some pressure.} Ng6 $1 23. Bh5 e4 {[#]} ({Better is} 23... Kf7 $14) 24. d3 $1 $16 {[%cal Rd3e4][%mdl 512]} Qe5 {[#]} (24... Be7 $16 25. dxe4 f4) (24... Qxd3 25. Qxd3) 25. dxe4 $2 (25. g3 $1 $18) 25... Bd6 $11 {( -> ...Qh2+)} 26. f4 Qxf4 27. exf5 {[%mdl 64] Pin} Qh2+ (27... O-O $1 $11 28. Qxe6+ {[%mdl 64] Double Attack} Kh8 29. Bxg6 hxg6) 28. Kf1 $16 O-O 29. Qxe6+ {[%mdl 64] Double Attack} Kh8 {White must now prevent ...Nf4!} 30. Bxg6 hxg6 $2 (30... Bg3 $16 31. Ne3 (31. Nxb6 hxg6 32. Qxg6 Qh1+ 33. Ke2 Qxg2+ 34. Kd3 Qf3+ 35. Ne3 Bxe1 $16) 31... hxg6 32. Qxg6 Rbe8 33. Qh5+ (33. Nxb6 Re4 $17) 33... Kg8) 31. Ne3 $2 (31. Qxg6 $18 Qf4+ 32. Ke2) 31... Rbe8 {[%cal Bb8e8,Be8e3,Be3g3][%mdl 32]} 32. Qxg6 $2 {[%mdl 8192]} (32. Ng4 $11 Qf4+ {[%mdl 64] Double Attack} 33. Kg1 Rxe6 34. fxe6) 32... Qf4+ $19 {[%mdl 64] Double Attack} 33. Kg1 Rxe3 34. Qg4 Qh2+ {Black mates.} 35. Kf2 Rg3 {[%csl Gg3][%cal Rh2g2][%mdl 64] Double Attack} 36. Qh5+ Kg8 {[%csl Gg3][%cal Rh2g2]} 37. Rg1 {[#]} g6 $1 {[%mdl 512]} 38. Qh4 Rxf5+ 39. Ke2 Rxg2+ 40. Rxg2 Qxg2+ 41. Ke1 Rf1# {Weighted Error Value: White=0.65/Black=0.32} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.3"]
[White "Sandoval Mercado, Carlos"]
[Black "Quiroga Jaquez, Angel Ivan"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "2298"]
[BlackElo "2178"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,101,18,54,55,33,33,41,45,47,47,50,50,58,41,83,86,188,190,293,306,327,309,256,144,147,157,137,161,154,147,143,144,156,153,155,142,151,153,176,82,217,158,161,151,234,127,266,99,220,197,210,76,148,157,206,203,177,180,156,178,758,744,29997,0,95,0,29997,933,1629,1559,29977,29978,29972,1928,2219,1913,29972,29973,1652,0,792,768,1516,1376,979,739,733,736,731,720,783,685,882,875]} 1. d4 Nf6 2. Nc3 d5 3. Bf4 c6 4. f3 g6 5. Qd2 Bg7 6. e4 {D00: 1 d4 d5: Unusual lines.} dxe4 7. fxe4 Nh5 8. Be3 {[#] White is slightly better.} e5 $146 {[%cal Re5d4]} ({Predecessor:} 8... Nf6 9. Nf3 O-O 10. Bh6 Qa5 11. Bxg7 Kxg7 12. a3 b5 13. Bd3 Bb7 14. O-O Qb6 {1-0 (51) De la Plaza Gras,J (1978)-Martinez Hernandez,E (1808) Barcelona 2017}) 9. d5 cxd5 10. Nxd5 Nc6 11. O-O-O Be6 12. Qe1 Qc8 (12... O-O $16 {was called for.}) 13. Bb5 $1 $18 f6 (13... Qd8 $142 14. Nb6 Qe7 15. Nxa8 O-O 16. Bxc6 bxc6) 14. Nf3 Rf8 15. Rf1 Rf7 16. Kb1 (16. Bc5 $18) 16... Kf8 $16 17. Bc5+ Kg8 18. Bxc6 Qxc6 19. Ne7+ $1 Rxe7 20. Bxe7 Rc8 21. Rd8+ Rxd8 22. Bxd8 Bf8 23. Nd2 b6 24. Nb3 (24. Qe3 $18 {is more deadly.}) 24... a5 (24... Kf7 $16) 25. Qf2 a4 26. Nc1 (26. Qxb6 Qxb6 27. Bxb6 axb3 $11) 26... Bc5 (26... Qxe4 $16 {keeps fighting.} 27. Bxf6 (27. Qxb6 Bf5 $16) (27. Bxb6 Qd5 $14) 27... Nxf6) 27. Qh4 (27. Qf3 $18) 27... Qb5 (27... Bd4 $16 28. Rf3 (28. Bxf6 $2 Bxa2+ {[%mdl 64] Deflection} 29. Kxa2 Qxc2 $19 {[%mdl 64] Double Attack}) 28... f5) 28. Rd1 $2 (28. Rf3 $1 $18 {and the rest is easy.}) 28... Bd4 {[#]} (28... Ba3 $16 29. b3 (29. Nd3 $2 Bxb2 30. Be7 Ba3+ {[%mdl 64] Discovered Attack} 31. Bb4 Bxb4 $19) 29... Qc5) 29. Rxd4 $1 $18 {[%mdl 512]} exd4 30. g4 (30. Bxf6 $18 Nxf6 31. Qxf6 {[%mdl 64] Double Attack}) 30... a3 ({Black should try} 30... Qd7) 31. b3 $16 d3 32. Nxd3 ({Inferior is} 32. gxh5 d2 $15) 32... Bc4 33. gxh5 Bxd3 34. Qxf6 Qxh5 $2 (34... Bxe4 35. hxg6 (35. Bxb6 Bxc2+ 36. Kxc2 Qe2+ {[%mdl 64] Double Attack} 37. Kc1 Qe1+ 38. Kc2 Qe2+ {[%mdl 64] Double Attack} 39. Kc1 Qe1+ 40. Kc2 Qe2+ $11 {[%mdl 64] Double Attack}) 35... hxg6) 35. Qe6+ $18 Kf8 36. Qf6+ $2 (36. Be7+ {mates} Kg7 37. Qf6+ Kh6 38. Qf8#) 36... Kg8 $16 {[%cal Rh5d1]} 37. Qe6+ $2 {[%mdl 8192]} (37. Kc1 $16 Qc5 38. Qe6+ Kf8 {[#]} 39. Be7+ $1 {[%mdl 512]} Qxe7 40. Qxe7+ Kxe7 41. cxd3) 37... Kf8 $1 {[%cal Rh5d1]} 38. Qd6+ (38. Be7+ $142 Kg7 39. Qf6+ Kh6 40. Qf8#) 38... Kf7 39. Qxd3 {White wants to mate with Qd7+.} Qxh2 40. Qd7+ Kg8 41. Qe8+ (41. Qe6+ $142 Kg7 42. Bg5 Qh1+ 43. Bc1 g5 44. e5 Qf3 45. Qd7+ Kg6 46. Qd6+ Kh5 47. Qd8) 41... Kg7 $18 42. Qe7+ {[%mdl 64] Double Attack} Kg8 43. Qe6+ {[%mdl 64] Double Attack} Kg7 44. Qe7+ Kg8 $1 {[%cal Rh2h1]} 45. Qxa3 {White is clearly winning.} Qh1+ 46. Qc1 Qxe4 47. Bf6 Kf7 48. Bc3 h5 49. Qg5 Ke6 50. Qf6+ Kd5 51. Qxb6 {Accuracy: White = 61%, Black = 45%.} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.4"]
[White "Asaria, Danial"]
[Black "Chen, Ryo"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "2284"]
[BlackElo "2165"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,89,30,49,31,39,36,38,35,47,2,30,30,42,6,15,14,12,16,14,12,12,12,12,2,18,0,0,0,0,0,0,0,7,29,81,77,43,8,145,75,202,210,557,536,1150,1087,1209,1162,1033,232,5197,3461,5406,5406,29970,29972,29969,6195,5302,0,29969,29969,29976,29970,29991,29992,29992,29993,29993,29994]} 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. Bg5 d6 6. e3 Nbd7 7. Be2 e5 8. Qc2 c6 9. Rd1 Qc7 10. O-O Re8 11. dxe5 dxe5 12. Nd2 {E61: King's Indian: Early deviations for White, including Smyslov System.} Nf8 13. Bh4 Bf5 14. Qc1 {[#] White is slightly better.} N8d7 $146 {[%cal Bf8d7,Bd7c5,Bc5d3][%mdl 32]} ({Predecessor:} 14... Rad8 15. a3 h5 16. c5 N8h7 17. Nc4 Be6 18. Nd6 Rf8 19. Qc2 g5 20. Bg3 Nd7 {1-0 (36) Bruzon Batista,L (2652)-Jobava,B (2646) Turin 2006}) 15. Rfe1 h5 16. h3 Nc5 17. Bxf6 (17. b4 $5 {[%cal Rb4c5]} Nd3 18. Bxd3 Bxd3 19. Nb3 $11) 17... Bxf6 18. b4 Nd3 19. Bxd3 Bxd3 20. Nde4 Bxe4 21. Nxe4 Be7 22. c5 Rad8 23. Qc4 Rxd1 24. Rxd1 Rd8 25. Rd3 Rxd3 26. Qxd3 f5 27. Nd6 Kf8 (27... Bxd6 $11 {remains equal.} 28. cxd6 (28. Qxd6 Qxd6 29. cxd6 Kf7 $17) 28... Qd7) 28. Nc4 b5 {White must now prevent ...e4.} 29. Na5 (29. cxb6 $5 axb6 30. Qc3 $14) 29... Kf7 {[#] White leaves nothing to chance now.} (29... Bxc5 $11 30. bxc5 Qxa5) 30. Qb3+ (30. a4 $142 $1 {[%mdl 512]}) 30... Kf6 (30... Kg7 $16 {is a better defense.}) 31. Qg8 $18 e4 $2 (31... h4 {is tougher.} 32. Qh8+ Kf7) 32. Qe8 Bxc5 33. bxc5 Qxa5 34. Qxc6+ {[%mdl 4096] Endgame KQ-KQ} Kg7 35. Kh2 $2 {[#]} (35. Qb7+ Kh6 36. Qb8) 35... h4 $2 ({Don't blunder} 35... Qxa2 $2 36. Qd7+ Kh6 37. c6 $18) (35... Qd2 36. Qxb5 h4) 36. Qd6 Qc3 37. c6 Kh6 38. c7 Kh5 39. Qd1+ (39. Qe7 $142 a6 40. g3 Kh6 41. Qxh4+ Kg7 42. Qe7+ Kh8 43. Qf8+ Kh7 44. c8=Q Qxc8 45. Qxc8) 39... Kh6 40. Qd6 (40. Qd8 $18 Qe5+ 41. g3 hxg3+ 42. Kg2) 40... Kh5 41. Qe7 {White mates.} Qc1 42. Qd8 Qc3 43. c8=Q Qe5+ 44. g3 hxg3+ 45. Kg2 {Weighted Error Value: White=0.66/Black=0.53} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.5"]
[White "Stearman, Josiah"]
[Black "Park, Evan"]
[Result "1-0"]
[ECO "E52"]
[WhiteElo "2391"]
[BlackElo "2173"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,45,0,0,0,-5,111,128,114,115,102,93,277,211,397,174,177,122,374,375,410,378,357,372,803,764,914,904]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6 7. cxd5 exd5 8. O-O Bb7 9. Ne5 Bd6 10. f4 c5 11. Qf3 Nc6 {E52: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5 6 Bd3 b6.} 12. Qh3 {Strongly threatening Nxd5!} cxd4 {[#]} (12... h6 $11 {keeps the balance.}) 13. Nxd5 $146 {[%mdl 512]} ({Predecessor:} 13. Nxc6 Bxc6 14. exd4 Ne4 15. f5 Qf6 16. Be3 Rfe8 17. Rae1 h6 18. Qh5 Re7 19. Bb5 {1-0 (33) Arabidze,M (2428)-Cornette,D (2400) chess.com INT 2020}) 13... g6 {White is better.} (13... Nxd5 14. Qxh7#) 14. Nxf6+ $40 {[%mdl 192] Overworked Piece. White goes for the king.} Qxf6 15. Nd7 Qg7 $2 (15... Qd8 $16) 16. Nxf8 Rxf8 $2 (16... Bxf8 {was necessary.} 17. Bd2 Re8) 17. e4 (17. Qd7 $142) 17... Nb4 $18 18. f5 (18. Bd2 $18) 18... Qe5 $2 {[%mdl 8192]} (18... g5 $16) 19. Bf4 Qe7 {[#]} 20. f6 $1 Qxf6 21. Bh6 $1 {[%csl LRf6,LRf8][%mdl 64] Discovered Attack} Qe5 $2 (21... Qe6) 22. Bxf8 Bxf8 23. Bc4 {Weighted Error Value: White=0.36/Black=0.82} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.6"]
[White "Vivekananthan, Anish"]
[Black "Chiu, Isaac"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2305"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,117,-32,-26,-36,-33,-25,-30,-30,-17,-39,-25,-28,-17,-9,-21,-31,-5,-24,0,0,0,0,61,55,75,63,42,17,30,31,31,36,25,19,108,50,34,35,40,40,50,41,43,31,37,41,41,33,106,119,137,126,131,126,170,170,170,170,170,170,200,170,178,133,185,0,166,128,224,222,210,233,365,340,662,654,662,637,650,645,645,650,598,587,655,587,620,550,661,656,703,662,649,610,1249,1153,2160,1107,1035,998,2309,2429,2691,2577,12820,6291,1804,1742,29993,29994]} 1. a3 g6 2. h4 h5 3. e4 Bg7 4. Nf3 c5 5. Nc3 Nc6 6. Bc4 {A00: Irregular Openings.} d6 7. Ng5 e6 8. d3 {Black has an edge.} Nf6 9. f3 {[#]} a6 $146 ({Predecessor:} 9... O-O 10. Ba2 a6 11. Be3 b5 12. Qd2 Bd7 13. g4 Qa5 14. Nd1 b4 15. a4 Qxa4 16. gxh5 Nxh5 17. Bxe6 Qxa1 18. Bxd7 {0-1 (23) Nunez V,G (2176)-Avila Pavas,S (2295) Palmira 2019}) 10. Ba2 b5 11. Ne2 d5 12. Be3 Qd6 13. c3 dxe4 14. dxe4 Qxd1+ 15. Rxd1 Nd7 (15... c4 $11) 16. f4 $14 {Hoping for f5!} c4 17. e5 Ne7 18. O-O Nf5 19. Bf2 Bf8 20. Bb1 {Threatens to win with Be4.} Bc5 21. Nd4 Ra7 (21... Bxd4 $11 {remains equal.} 22. Bxd4 (22. cxd4 Nb6 $15) 22... Bb7) 22. Ne4 (22. Nc6 $16 Bxf2+ 23. Rxf2 (23. Kxf2 Rc7 $16)) 22... Rc7 23. Nxc5 Nxc5 24. Nxf5 gxf5 25. Bxc5 Rxc5 26. Rd6 Ke7 27. Rfd1 Rc7 28. Kf2 Bb7 ({Black should play} 28... Rg8 $14) 29. Bc2 $16 f6 30. exf6+ Kxf6 31. Re1 Re7 32. Re5 Kf7 33. Bd1 Kf6 34. g3 Kf7 35. Be2 Bc8 36. Bf3 Kf6 {[#]} (36... Rc7 $16 {might work better.} 37. a4 bxa4) 37. Be2 $2 (37. Rc5 $1 $18) 37... Rg7 $2 (37... Kf7 $1 $11) 38. Rb6 Ke7 {[#]} (38... Rc7 $16 39. a4 bxa4) 39. a4 $1 $18 {[%mdl 512]} bxa4 40. Bxc4 {[%mdl 64] Double Attack} Rh6 (40... Rg6 {was called for.} 41. Rxf5 (41. Bxa6 Bxa6 42. Rxa6 Rd8 $16) 41... Rxg3) 41. Bxa6 Kd8 $2 (41... Bd7 42. c4 Rg8) 42. Rb8 Rc7 43. Ra5 Kd7 44. Bxc8+ Rxc8 45. Rxc8 Kxc8 46. Rxa4 {[%mdl 4096] Endgame KR-KR} Rh7 47. Rd4 Rb7 48. b4 Ra7 49. Rd3 Kc7 50. Ke3 Kc6 51. Kd4 Rd7+ 52. Kc4 {Threatening mate with b5+.} Rb7 53. Re3 Kd6 54. b5 {[%cal Bb4b5,Bb5b6][%mdl 32]} Rc7+ 55. Kb4 Ra7 56. Rd3+ Kc7 57. c4 Ra1 58. Kc5 {b6+ would kill now.} Ra3 59. b6+ {Weighted Error Value: White=0.12/Black=0.37} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.7"]
[White "Venkat, Raghav"]
[Black "Tsay, Vincent"]
[Result "1/2-1/2"]
[ECO "C18"]
[WhiteElo "2167"]
[BlackElo "2266"]
[Annotator "TA"]
[PlyCount "35"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,35,18,22,12,31,22,58,47,45,44,48,33,36,37,82,66,78,86,73,37]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Ba5 6. b4 cxd4 7. Nb5 Bc7 8. f4 Bd7 {The main line 8...Bd7 scores better than 8...Ne7.} 9. Nxc7+ Qxc7 10. Bb2 {C18: French: 3 Nc3 Bb4: Main line: 7 h4 and 7 Qg4.} Ne7 11. Bd3 Qb6 12. Nf3 {White is slightly better.} Bb5 13. Bxd4 {[#]} Qc6 $146 ({Predecessor:} 13... Qa6 14. O-O Nd7 15. a4 Bxd3 16. cxd3 O-O 17. Qd2 b6 18. Nh4 Ng6 19. Nxg6 fxg6 {0-1 (42) Finnlaugsson,G-Haugli,P (2330) Naestved 1988}) 14. Bc5 {[#] Nd4 is the strong threat.} Bxd3 15. cxd3 Qd7 16. Rc1 Na6 17. Bxe7 Qxe7 18. Qa4+ {Weighted Error Value: White=0.06/Black=0.13} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.8"]
[White "Cervantes Landeiro, Thalia"]
[Black "Lu, Ming"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "2311"]
[BlackElo "2154"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,65,30,25,31,39,-1,60,62,48,-4,-3,0,22,0,0,-14,32,12,68,77,127,126,166,122,215,211,190,155,145,144,166,174,182,184,332,277,385,324,376,381,350,375,365,368,500,489,490,495,497,504,503,497,499,491,491,493,670,652]} 1. d4 d5 2. c4 c6 3. e3 Nf6 4. Bd3 Bg4 5. f3 Bh5 6. Ne2 {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3.} e6 7. cxd5 exd5 (7... cxd5 $11 8. Nbc3 Nc6) 8. Nbc3 $14 {White is slightly better.} Be7 {[#]} 9. e4 $146 (9. O-O $14) ({Predecessor:} 9. O-O Nbd7 10. e4 dxe4 11. fxe4 Qb6 12. Na4 Qd8 13. Qe1 c5 14. Nf4 O-O 15. e5 {1-0 (37) De Francisco y de Diego,F (2044)-Fernandez Garcia,F (1913) Malaga 2009}) 9... dxe4 $11 10. fxe4 O-O 11. O-O c5 12. d5 c4 13. Bxc4 {Black should prevent Kh1.} Qb6+ ({Better is} 13... Nbd7 $11) 14. Kh1 $1 $14 Ng4 {[#]} 15. Qe1 $1 Qc7 {[%csl Gg4][%cal Rc7h2]} 16. Ng3 {Black must now prevent Be2.} Bh4 {[#]} (16... Qxc4 $16 17. Nxh5 g6) 17. Be2 $1 $18 Bxg3 18. Qxg3 Qxg3 19. hxg3 Nf6 20. Bf3 Nbd7 21. Bf4 Bg6 (21... Rac8 $142 22. Rfe1 a6) 22. Rfe1 a6 23. Bd6 Rfc8 24. e5 Ne8 25. Ba3 Rab8 26. Bg4 f5 27. Bf3 {White is clearly winning.} b5 28. Bb4 a5 29. Be7 Nc5 30. Bxc5 Rxc5 31. d6 Rd8 32. Rad1 h6 33. d7 {Weighted Error Value: White=0.12/Black=0.35} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.9"]
[White "Truelson, Joseph"]
[Black "Sheng, Joshua"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2046"]
[BlackElo "2474"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,64,0,0,-12,-17,-60,0,-7,6,-47,-47,-50,-49,-45,-52,-63,-44,-49,-39,-108,-108,-108,-100,-98,-98,-142,-110,-141,-100,-127,-132,-164,-172,-147,-166,-158,-116,-127,-122,-220,-226,-220,-199,-201,-199,-205,-202,-226,-223]} 1. e4 c5 2. Nc3 e6 3. Nf3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. Be3 Nf6 7. Bd3 b5 8. a3 Bb7 9. O-O d6 10. f3 {B43: Sicilian: Kan Variation: 5 Nc3.} Nbd7 11. Nce2 Ne5 {[#]} (11... d5 $15 12. exd5 Nxd5) 12. a4 $146 {The position is equal.} ({Predecessor:} 12. Rc1 Nc4 13. Bxc4 Qxc4 14. Qd3 {1-0 (14) Varga,M (1768)-Svatos,Z Rychnov 2010}) 12... b4 {[%cal Bb5b4,Bb4c3][%mdl 32]} 13. c3 ({White should play} 13. c4 $1 $11) 13... d5 $15 14. exd5 Nxd5 15. Bf2 $1 bxc3 16. Rc1 {[%cal Re2c3]} Nxd3 17. Qxd3 {[%cal Re2c3]} Bd6 18. Bg3 ({White should try} 18. h3 $15) 18... Bxg3 $17 19. Nxg3 {[%cal Rb2c3]} O-O 20. bxc3 Rfd8 21. Kh1 Rac8 22. Nde2 Qa5 23. c4 Nb6 24. Qb1 Bc6 25. c5 Nxa4 26. Qa1 Qd2 27. Rfd1 Qb2 28. Nd4 (28. Rc4 $17 {was worth a try.} Qxa1 29. Rxa1) 28... Qxa1 $19 {Black is clearly better.} 29. Rxa1 Kf8 ({Not} 29... Nxc5 30. Nxc6 Rxd1+ 31. Rxd1 $16) 30. Nxc6 Rxd1+ 31. Rxd1 {[#] Black must now prevent Ne5.} Rxc6 32. Ne4 f5 {Weighted Error Value: White=0.21/Black=0.12} ({Worse is} 32... Nxc5 33. Rc1 $16) 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "6.10"]
[White "Chen, Jonathan"]
[Black "Carter, Emmanuel"]
[Result "1/2-1/2"]
[ECO "E69"]
[Annotator "NA RC"]
[PlyCount "116"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. d4 {[%emt 0:00:53]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:48]} g6 {[%emt 0:00:04]} 3. g3 {[%emt 0:00:48]} Bg7 {[%emt 0:00:54]} 4. Bg2 {[%emt 0:00:55]} d6 {[%emt 0:00:04]} 5. Nc3 {[%emt 0:01:49]} Nbd7 {[%emt 0:03:00]} 6. Nf3 {[%emt 0:01:19]} c6 {[%emt 0:00:08]} 7. O-O {[%emt 0:02:06]} O-O {[%emt 0:00:28]} 8. e4 {[%emt 0:01:07]} e5 {[%emt 0:00:04]} 9. h3 {[%emt 0:00:22]} exd4 {[%emt 0:01:46]} 10. Nxd4 {[%emt 0:01:39]} Nb6 {[%emt 0:01:17]} 11. b3 {[%emt 0:05:41]} Nfd7 {[%emt 0:08:15]} 12. Bb2 {[%emt 0:07:44]} a5 {[%emt 0:00:58]} 13. Nde2 {[%emt 0:08:02]} Nc5 {[%emt 0:01:06]} 14. Qc2 {[%emt 0:03:35]} Qc7 {[%emt 0:17:15]} 15. Rad1 {[%emt 0:04:33]} Be6 {[%emt 0:01:54]} 16. Bc1 {[%emt 0:04:51]} Rad8 {[%emt 0:08:26]} 17. Bg5 {[%emt 0:02:46]} Rd7 {[%emt 0:01:21]} 18. Be3 {[%emt 0:02:38]} Rdd8 {[%emt 0:14:31]} 19. f4 {[%emt 0:02:36]} f6 {[%emt 0:00:44]} 20. Kh2 {[%emt 0:07:35]} Rfe8 {[%emt 0:02:56]} 21. Rd2 {[%emt 0:04:03]} a4 {[%emt 0:03:27]} 22. Bxc5 {[%emt 0:09:12]} dxc5 {[%emt 0:00:14]} 23. Rfd1 {[%emt 0:00:25]} axb3 {[%emt 0:08:55]} 24. axb3 {[%emt 0:00:15]} Qe7 {[%emt 0:00:17]} 25. Nc1 {[%emt 0:04:39]} Na8 {[%emt 0:09:11]} 26. Rxd8 {[%emt 0:04:36]} Rxd8 {[%emt 0:00:13]} 27. Rxd8+ {[%emt 0:00:10]} Qxd8 {[%emt 0:00:04]} 28. Qd3 {[%emt 0:00:06]} Qe7 {[%emt 0:01:28]} 29. Qe3 {[%emt 0:02:25]} Nc7 {[%emt 0:00:14]} 30. Nd3 {[%emt 0:00:19]} Na6 {[%emt 0:00:04]} 31. e5 {[%emt 0:03:20]} fxe5 {[%emt 0:01:55]} 32. fxe5 {[%emt 0:01:19]} Bf5 {[%emt 0:00:59]} 33. Be4 {[%emt 0:01:30]} Be6 {[%emt 0:07:05]} 34. Ne2 {[%emt 0:01:31]} Bf8 {[%emt 0:00:17]} 35. Nef4 {[%emt 0:01:05]} Bf7 {[%emt 0:00:35]} 36. e6 {[%emt 0:01:44]} Be8 {[%emt 0:02:41]} 37. h4 {[%emt 0:02:46]} Bg7 {[%emt 0:00:08]} 38. Bg2 {[%emt 0:00:33]} Bd4 {[%emt 0:01:02]} 39. Qe4 {[%emt 0:00:30]} Qf6 {[%emt 0:02:10]} 40. Bh3 {[%emt 0:01:11]} Nb4 {[%emt 0:00:33]} 41. Ne1 {[%emt 0:01:39]} Qe5 {[%emt 0:01:42]} 42. Qxe5 {[%emt 0:00:25]} Bxe5 {[%emt 0:00:03]} 43. Nf3 {[%emt 0:00:08]} Bf6 {[%emt 0:00:10]} 44. Nd2 {[%emt 0:01:13]} Kg7 {[%emt 0:01:28]} 45. Ne4 {[%emt 0:00:12]} Be7 {[%emt 0:00:01]} 46. g4 {[%emt 0:01:00]} Nc2 {[%emt 0:00:46]} 47. Nd3 {[%emt 0:01:01]} b6 {[%emt 0:00:09]} 48. g5 {[%emt 0:01:11]} Nd4 {[%emt 0:00:05]} 49. Ne5 {[%emt 0:02:06]} Nxb3 {[%emt 0:00:43]} 50. Ng4 {[%emt 0:00:05]} b5 {[%emt 0:00:51]} 51. Ngf6 {[%emt 0:00:17]} Kf8 {[%emt 0:00:26]} 52. Nxh7+ {[%emt 0:00:57]} Kg7 {[%emt 0:00:02]} 53. Nhf6 {[%emt 0:00:35]} Kf8 {[%emt 0:00:02]} 54. Nh7+ {[%emt 0:02:08]} Kg7 {[%emt 0:00:17]} 55. Nhf6 {[%emt 0:00:12]} Kf8 {[%emt 0:00:47]} 56. Nh7+ {[%emt 0:00:51]} Kg8 {[%emt 0:01:04]} 57. Nhf6+ {[%emt 0:00:23]} Kf8 {[%emt 0:01:14]} 58. Nh7+ {[%emt 0:00:36]} Kg8 {[%emt 0:00:37]} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.1"]
[White "Chasin, Nico"]
[Black "Liang, Jason"]
[Result "0-1"]
[ECO "A14"]
[WhiteElo "2303"]
[BlackElo "2317"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,112,5,0,0,0,0,0,3,-12,0,-4,34,-32,-42,-43,-43,-60,-43,-45,-49,-54,-40,-39,-43,-39,-24,-37,0,-17,7,0,0,0,35,21,25,8,0,-44,-48,-85,-31,-41,0,0,2,-11,0,-38,-29,-23,-10,-8,0,-75,-7,-108,-97,-184,-169,-180,-159,-317,-323,-292,-295,-698,-698,-1061,-1039,-1367,-1377,-29987,-2990,-29988,-2808,-2529,-2251,-2882,-2175,-2908,-2782,-29987,-29988,-29988,-29980,-29980,-29981,-29982,-29983,-29984,-29985,-29985,-29986,-29985,-29982,-29988,-29985]} 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. e3 O-O 6. b3 b6 7. O-O Bb7 8. Bb2 c5 9. Nc3 Qc8 {A14: English Opening: 1...e6 with b3 by White.} 10. Rc1 Rd8 11. Qe2 Nc6 {The position is equal.} 12. d3 Qd7 13. Rfd1 Rac8 {[#]} 14. Qf1 $146 ({White should try} 14. d4 $14) ({Predecessor:} 14. h3 h6 15. a3 a6 16. Qc2 Qc7 17. Qb1 Qb8 18. cxd5 Nxd5 19. Nxd5 Rxd5 20. Qa1 {1-0 (40) He,A (2337)-Saksham,R (2480) chess.com INT 2020}) 14... d4 $15 15. Nb1 Rb8 16. a3 a5 17. exd4 cxd4 18. Qe2 Bc5 19. Nbd2 Qe7 20. Ra1 h6 21. Nh4 g6 22. Bc1 Kg7 23. Re1 Re8 24. f4 Qd7 25. Ndf3 Ng4 26. Bh3 Ne3 27. Qb2 {And now Bxe3 would win.} Kg8 28. Nd2 Nf5 (28... Bf8 $17) 29. Ne4 {Hoping for Nf6+.} Be7 (29... Qd8 $5 {[%cal Rf5h4]} 30. Nf3 Bf8 $11) 30. Nf3 Nd6 31. Nf2 f5 32. b4 {Strongly threatening b5.} b5 $36 {[%mdl 2048] White is under pressure.} 33. c5 Nf7 34. Bg2 Bf6 35. Qb3 (35. bxa5 $11 Nxa5 36. Bd2) 35... Kg7 (35... a4 $17 36. Qa2 Na7) 36. g4 (36. bxa5 $1 $11 {remains equal.} Nxa5 37. Qb4) 36... e5 $1 $17 {White is now going downhill.} 37. Bh3 (37. h3 $17) 37... exf4 $1 $19 38. Bxf4 Nce5 39. Nxe5 $2 (39. Bxe5 $17 Nxe5 40. Nxe5 Bxe5 41. Bg2) 39... Bxe5 40. gxf5 gxf5 ({Wrong is} 40... Bxf4 $2 41. f6+ $1 {[%mdl 512]} Kxf6 42. Bxd7 $18) 41. Bd2 $2 (41. Rxe5 Nxe5 42. Ne4) 41... Qc6 42. Qd1 {If only White now had time for Qh5....} Qg6+ 43. Kf1 Bxh2 {[%csl Gh2][%cal Rg6g1]} 44. Rxe8 Qg1+ 45. Ke2 {[#]} Rxe8+ (45... Bf3+ $142 $1 {[%mdl 512]} 46. Kxf3 Qg3+ 47. Ke2 Rxe8+ 48. Be3 Rxe3+ 49. Kd2 Qxf2+ 50. Kc1 {[#]} Re1 $1 {[%mdl 512]} 51. Qxe1 Qxe1+ 52. Kc2 Qe2+ 53. Kc1 Bf4+ 54. Kb1 Qxd3+ {[%mdl 64] Double Attack} 55. Kb2 Qc3+ {[%mdl 64] Double Attack} 56. Kb1 Qb3#) 46. Ne4 Qg3 {( -> ...Rxe4+)} 47. Qf1 fxe4 48. Kd1 e3 49. Be1 e2+ {[%mdl 64] Discovered Attack. Black mates.} 50. Qxe2 Bf3 {[%mdl 64] Pin} 51. Bxg3 Rxe2 52. Bxh2 Rxh2+ 53. Ke1 Rxh3 54. Kf2 Ne5 55. Rg1+ Kf6 56. Ke1 Rh2 {Weighted Error Value: White=0.87/Black=0.24} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.2"]
[White "Wu, Derek"]
[Black "Asaria, Danial"]
[Result "0-1"]
[ECO "D17"]
[WhiteElo "2106"]
[BlackElo "2284"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,62,0,32,0,14,9,4,0,0,7,10,0,0,0,0,0,0,0,0,0,-12,0,10,-62,-51,-61,-58,-47,-47,-44,-57,-167,-151,-339,-331,-538,-533,-910,-889,-1022,-912,-795,-710,-29984,-29985,-29981,-6702,-29994,-29995,-29995,-29996]} 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 dxc4 5. a4 {[%cal Ba2a4,Ba4a5,Ba5a6][%mdl 32]} Bf5 6. Ne5 Nbd7 {[%cal Bb8d7,Bd7b6,Bb6d5][%mdl 32] The main line 6...Nbd7 scores better than 6...e6.} 7. Nxc4 Nb6 8. Ne3 {D17: Slav Defence: 5 a4 Bf5: Lines with 6 Nh4 and 6 Ne5.} e6 9. Nxf5 exf5 10. a5 {The position is equal.} Nbd5 11. a6 {[#]} b5 $146 ({Predecessor:} 11... b6 12. g3 Bb4 13. Bd2 O-O 14. Bg2 Qe7 15. O-O Rac8 16. Nxd5 Nxd5 17. e3 Rfd8 18. Bxb4 Nxb4 {1-0 (43) Hammer,J (2583)-So,W (2646) Lubbock 2009}) 12. g3 Bb4 13. Bd2 Bxc3 14. bxc3 Ne4 15. Bg2 O-O 16. Qc2 Re8 17. O-O h5 18. Be1 (18. Bxe4 $11 Rxe4 19. e3) 18... h4 $15 19. c4 bxc4 20. Qxc4 hxg3 21. hxg3 Re6 22. Qc2 ({White should try} 22. Qc1 $15) 22... Qg5 $1 $19 23. Rb1 $2 {[#] White does not recover from this.} (23. Qc1 $17 {was worth a try.} f4 24. Bd2) 23... Rh6 $1 24. Bf3 $2 (24. Bxe4 {leads to mate.} Qh5 25. Rb8+ Rxb8 26. Kg2 {[#]} Nf4+ $1 {[%mdl 512]} 27. gxf4 Rg6#) (24. f4 {was forced.} Qh5 25. Rf3) 24... Re8 25. Qc1 {Qxg5 would now be nice for White.} f4 26. Rb3 Qf5 27. g4 {[#]} Qg5 $1 {[%mdl 512] ( -> ...Qh4)} 28. Bd2 Qh4 {[%csl Gh6][%cal Rh4h2]} 29. Bxf4 g5 30. Bb8 {[#]} Rxb8 $1 {[%mdl 512]} 31. Rxb8+ Kg7 {Weighted Error Value: White=1.00/Black=0.05} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.3"]
[White "Vivekananthan, Anish"]
[Black "Sandoval Mercado, Carlos"]
[Result "1-0"]
[ECO "B53"]
[WhiteElo "2305"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,83,-6,-17,-4,-16,-13,-49,-32,-20,-14,-48,0,-41,-40,-25,94,-12,-25,-31,0,0,0,0,0,-51,-29,-41,0,0,35,27,55,50,98,32,26,29,58,23,110,60,397,158,179,177,194,175,239,224,231,230,204,170,271,260,399,395,381,381,337,332,364,346,29997,29998]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. O-O-O Be7 10. Qd3 Qa5 11. Kb1 O-O {B53: Sicilian: 2...d6: Lines with Qxd4.} 12. Rhe1 Rfd8 {[#]} 13. h3 $146 ({Predecessor:} 13. Qd2 Qc7 14. Nd4 Be8 15. f3 a6 16. g4 b5 17. Nce2 Rac8 18. Ng3 a5 19. Rg1 Kh8 20. Nh5 Ng8 21. Bxe7 Nxe7 {0-1 (37) Bauer,C (2630)-Stojanovic,M (2509) Switzerland 2017}) 13... b5 {Black is slightly better.} 14. Nd4 Be8 $1 15. f4 {[%cal Rc3b5]} b4 (15... h6 $5 {[%cal Rh6g5]} 16. Bh4 b4 $11) 16. Nce2 (16. Nd5 $5 Nxd5 17. exd5 Bxg5 18. Nb3 $15) 16... Qc7 17. g4 g6 (17... Rac8 $11) 18. Bxf6 (18. f5 $16) 18... Bxf6 $11 19. g5 Bxd4 (19... Bg7 {feels hotter.} 20. f5 e5 21. Nf3 Bc6 22. Ng3 a5) 20. Nxd4 e5 21. Ne2 Bc6 22. Qf3 ({White should try} 22. h4 $11) 22... a5 $15 23. h4 a4 24. h5 Qb7 25. Ng3 exf4 26. Qxf4 {Qf6 is the strong threat.} b3 {[#]} 27. cxb3 (27. Qf6 $1 $16 bxc2+ 28. Kxc2) 27... axb3 $14 28. a3 Bb5 29. Qe3 (29. Rxd6 $2 Bd3+ 30. Rxd3 (30. Ka1 Rxa3+ {[%mdl 64] Promotion} 31. bxa3 b2+ 32. Ka2 b1=Q+ 33. Rxb1 Qxb1#) 30... Rxd3 $19) 29... Bc4 (29... Qa7 $11 {remains equal.}) 30. Qc3 Rac8 $2 {[%mdl 8192] [#] Now Black is done in.} ({Black should play} 30... Rdc8 $14) 31. h6 $2 (31. Qf6 $1 $18 Qb5 32. e5) 31... f6 $16 32. Qxf6 ({Don't play} 32. gxf6 $6 Be2 $16) 32... Qc7 33. Qd4 Rf8 (33... d5 {was worth a try.}) 34. Rc1 $18 ({Don't blunder} 34. Qxd6 $2 Qxd6 35. Rxd6 Rf3 $19) 34... Rf7 35. Rc3 {aiming for Rec1.} Qc5 36. Rd1 Rfc7 (36... Qxd4 $142 37. Rxd4 Rfc7) 37. Ne2 ({Don't do} 37. Qxd6 $6 Qxd6 38. Rxd6 Bb5 $16) 37... Qe5 (37... d5 $142 38. exd5 Qxd4 39. Nxd4 Bxd5) 38. Qxe5 dxe5 39. Nc1 Rb7 {[#]} 40. Rd5 $1 {[%mdl 512]} Rc6 (40... Bxd5 41. Rxc8+) 41. Rxe5 Kf7 $2 (41... Rc8 $18 42. a4 Kf7 43. Rf3+ Kg8) 42. Rf3+ {Accuracy: White = 58%, Black = 37%.} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.4"]
[White "Sheng, Joshua"]
[Black "Stearman, Josiah"]
[Result "1/2-1/2"]
[ECO "A18"]
[WhiteElo "2474"]
[BlackElo "2391"]
[Annotator "TA"]
[PlyCount "132"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,132,3,0,30,0,0,0,11,0,0,-13,29,35,30,28,33,33,33,33,33,17,33,25,31,0,-5,-11,0,-8,148,149,142,135,122,143,134,151,140,155,167,144,141,175,159,144,155,115,101,102,93,94,93,86,103,93,109,54,102,81,96,70,74,69,79,71,95,95,164,164,171,171,252,252,252,244,888,654,772,507,683,8,8,8,8,8,8,8,690,610,5097,1006,29937,29937,610,29944,29947,29945,29942,12851,12827,12824,12824,12823,12822,12819,12820,12816,12811,12802,10244,9847,6673,6079,5615,5126,4618,0,0,0,0]} 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. d4 e5 8. Nf3 Nc6 {A18: English Opening: Flohr-Mikenas System (1 c4 Nf6 2 Nc3 e6 3 e4).} 9. d5 Nb8 10. Bg5 Qg6 11. h4 h6 12. h5 Qb6 13. Be3 {[#]} Bc5 $146 ({Predecessor:} 13... Qa5 14. Qd2 Bd6 15. Rb1 b6 16. c5 bxc5 17. Rb5 Qa4 18. Rh4 e4 19. Qb2 Nd7 {0-1 (52) Winterberg,L (2375)-Barzen,P (2261) Germany 2018}) 14. Rb1 Qd6 15. Bxc5 Qxc5 16. Bd3 O-O 17. O-O Bg4 18. Rxb7 Nd7 19. Qa4 Qd6 {Hoping for ...Nc5.} 20. c5 $1 {[%cal Rc5d6]} (20. Rxa7 $2 Nc5 $19) 20... Nxc5 {[%mdl 64] Double Attack} 21. Qxg4 $40 {[%mdl 128] White mounts an attack.} Nxd3 $2 (21... Nxb7 $11 22. Qf5 g6 23. hxg6 fxg6 24. Qxg6+ Qxg6 25. Bxg6 e4 26. Bxe4 Nc5) 22. Nh4 $1 $16 Nf4 23. c4 g6 24. hxg6 fxg6 25. g3 {Threatens to win with c5.} h5 26. Qd1 Qd8 27. Qc2 Rf7 28. Rb3 Qf6 29. gxf4 Qxh4 30. Rg3 ({Wrong is} 30. Qxg6+ $2 Rg7 $1 $19 {[%mdl 512]}) 30... Qxf4 31. Qxg6+ {[%mdl 64] Double Attack} Kh8 32. Qxh5+ Rh7 33. Qg5 Rf8 34. Qxf4 Rxf4 {[%mdl 4096] Endgame KRR-KRR} 35. Rc1 (35. c5 $1 $16) 35... Rhh4 36. c5 $1 Rc4 37. Rxc4 (37. Re1 {feels hotter.} Rxc5 38. Rxe5 Rc1+ 39. Kg2 Rc2 40. a3) 37... Rxc4 {KR-KR} 38. c6 Rc5 39. Rb3 Rxd5 40. Rb7 $1 {[%csl LRa7,LRc7][%mdl 64] Double Attack} Rc5 (40... Kg7 $16) 41. Rxc7 $18 Kg8 42. Kg2 ({Much less strong is} 42. Rxa7 Rxc6 43. a4 Kf8 $16) 42... Rc3 (42... Kf8 {was necessary.} 43. Kf3 (43. Rxa7 Rxc6 44. a4 e4 $16) 43... a5) 43. Rxa7 Rxc6 44. a4 {[%cal Ba2a4,Ba4a5,Ba5a6][%mdl 32]} Rc3 $2 (44... Kf8 45. Kf3 Ke8) 45. a5 Ra3 46. a6 $1 e4 47. Ra8+ $2 (47. Kf1 $1 $18 Ra1+ 48. Ke2) 47... Kg7 $11 48. a7 {Strongly threatening Kf1.} Kh7 49. Kf1 {aiming for Ke2.} Ra2 50. Ke1 {Kd1 is the strong threat.} Kg7 $2 {[%mdl 8192]} (50... Ra1+ $11 51. Kd2 Ra3) 51. Kd1 $18 Kh7 52. Kc1 $1 {[%cal Rc1b1]} Kg7 53. Kb1 Ra4 {[#]} 54. Kb2 $1 Kh7 55. Kb3 Ra1 56. Kc4 Kg7 57. Kd5 Ra4 58. Kc6 Ra2 59. Kd6 Ra6+ 60. Ke5 Ra4 61. Kf5 {Cut Off at move 61} Kh7 62. Kf6 Ra6+ 63. Kf7 Ra3 {[#]} 64. Kf8 $1 Kh8 65. Kf7+ $2 (65. Ke7+ $18 Kg7 66. Kd8) 65... Kh7 $11 66. Ke6 e3 $1 {Weighted Error Value: White=0.16/Black=0.45} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.5"]
[White "Chen, Ryo"]
[Black "Cervantes Landeiro, Thalia"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2165"]
[BlackElo "2311"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,89,10,1,6,-2,-5,0,4,1,1,0,7,-13,0,0,18,19,3,1,90,32,34,26,30,25,53,44,148,137,141,127,195,203,209,118,238,228,221,225,254,252,247,235,254,254,249,223,249,171,287,286,320,262,253,223,283,288,288,288,273,287,269,175,462,443,582,498,2240,2040,5263,5202,29992,29993,29993,29993,29993,29994,29994,29993]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. c3 O-O 6. O-O d6 7. Nbd2 Ne7 {now supersedes 7...a6. C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5.} 8. d4 exd4 9. cxd4 Bb6 {The position is equal.} 10. Re1 Bg4 11. h3 Bh5 12. a4 Ba5 13. Re3 c6 14. Bd3 Bb6 15. Qc2 Bg6 (15... c5 $11) 16. Re1 {[#]} (16. b4 $16) 16... Re8 $146 ({Predecessor:} 16... d5 17. e5 Nd7 18. Nb3 a5 19. Bg5 f6 20. exf6 Nxf6 21. Re6 Qd7 22. Rae1 Bxd3 23. Qxd3 Ng6 24. Bxf6 Nf4 {½-½ (30) Svetushkin,D (2543)-Quesada Perez,Y (2636) Monzon 2016}) 17. b3 Rc8 18. Ba3 Nh5 19. g3 c5 {Black is now going downhill.} (19... Qd7 $14) 20. d5 $1 $16 Nxg3 {Strongly threatening ...Nh5.} 21. a5 $1 {[%cal Ra5b6]} Nh5 (21... Nxe4 $16 22. axb6 (22. Nxe4 Bxa5 23. Nc3 Qd7 $11) 22... Nxd2 23. Qxd2 (23. Nxd2 axb6 24. Qc4 Bxd3 $16) 23... Qxb6) 22. axb6 $18 axb6 {Black hopes to continue with ...Qd7.} 23. Bb5 (23. Qc4 $18) 23... Rf8 (23... Nxd5 $16 24. Bxe8 Qxe8) 24. Qc4 Nf4 25. Bb2 Nxh3+ 26. Kf1 Nf4 27. Qc3 $1 {[%csl Gb2][%cal Rc3g7]} f6 28. Nh4 Be8 {[#]} 29. Bxe8 $1 Qxe8 30. Qf3 g5 (30... Nfg6 {was called for.}) 31. Nc4 Rd8 32. Ng2 Nxg2 33. Qxg2 Qh5 {[#]} 34. Re3 $1 ({Resist} 34. Nxb6 $6 f5 $16) 34... b5 35. Rh3 Qg6 36. Ne3 h5 37. Ra5 {[%cal Ba1a5,Ba5b5,Bb5b7,Bb7e7,Be7g7][%mdl 32]} g4 $2 (37... f5 {might work better.}) 38. Rh4 f5 39. Rxb5 Qg5 (39... Rf7 $142 40. Rxb7 Rdf8) 40. Qh1 fxe4 41. Rxh5 Qg6 42. Rxb7 {White mates.} g3 43. Rxe7 {[%csl Gb2,Gh1][%cal Rh5h8]} Rxf2+ 44. Ke1 {[%csl Gb2,Gh1][%cal Rh5h8]} Kf8 45. Rg7 {Weighted Error Value: White=0.13/Black=0.52} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.6"]
[White "Tsay, Vincent"]
[Black "Fishbein, Mitch"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "2266"]
[BlackElo "2132"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,107,10,13,0,9,0,20,16,8,15,15,12,15,13,14,-2,11,6,29,8,43,0,43,32,55,15,23,0,21,21,70,41,58,-17,-2,-8,-20,-14,0,0,16,28,33,-8,30,-68,-56,-88,-78,-87,-14,-55,36,-178,-180,-152,-148,-331,-302,-311,-274,-277,-278,-283,-242,-237,-221,-220,-43,-211,-177,-193,-195,-217,-179,-206,-185,-153,-94,-85,-69,-60,-43,-30,0,-10,-3,-3,-4,-3,-3,-3,0,-4,0,-6,0,-12]} 1. d4 Nf6 2. Bf4 Nc6 3. Nf3 d6 4. e3 g6 5. h3 Bg7 6. Be2 O-O 7. Bh2 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems.} Re8 8. O-O Bf5 9. c4 e5 10. d5 {[#]} Nb8 $146 {[%cal Bc6b8,Bb8a6,Ba6c5][%mdl 32]} ({Predecessor:} 10... Nb4 11. a3 Na6 12. Nc3 Nc5 13. Nd2 a5 14. b4 axb4 15. axb4 Rxa1 16. Qxa1 Na6 17. Qa3 e4 18. Nb5 Bc8 19. Nd4 Nd7 {½-½ (19) Golubov,S (2469)-Moiseenko,V (2526) Khanty-Mansiysk 2019}) 11. Nc3 a5 12. Nd2 Na6 13. e4 Bc8 14. Bg3 Nc5 15. Qc2 Rf8 16. Nb3 b6 17. Bh4 h6 18. Nd2 Qe8 19. Nb5 Na6 20. a3 Nh7 21. f3 Nf6 22. Nb3 (22. b4 $14) 22... Bd7 23. Nc1 Nh5 24. Nd3 g5 25. Bf2 Nf4 26. Nxf4 gxf4 27. Rfe1 Bf6 28. Kh2 ({Better is} 28. b4 $11) 28... Qe7 $15 29. Rg1 Kh8 30. Qd2 Bg5 (30... Bh4 $17 31. Bxh4 Qxh4) 31. b4 Rg8 ({Black should try} 31... Bh4 $15 32. Bxh4 Qxh4) 32. bxa5 $2 (32. Qe1 $14 {stays ahead.}) 32... Bh4 $19 33. Bf1 bxa5 34. g3 $2 (34. c5 $17 Bxf2 35. Qxf2 Nxc5 36. Nxc7) 34... fxg3+ 35. Bxg3 Bxg3+ 36. Rxg3 {[%cal Rd2h6] [#]} Qh4 $1 {[%mdl 512]} 37. Qe1 {Threatens to win with Rxg8+.} Qf4 {And now ...h5 would win.} 38. Nc3 Nc5 39. Ne2 {[#]} Qe3 $2 ({Black should play} 39... Qf6 $1 $19 40. Bg2 Rxg3 41. Nxg3 Qf4) 40. Qc1 $2 (40. Nc3 $1 $15 Qf4 41. Ne2) 40... Qf2+ 41. Bg2 {[%cal Rc1h6]} Kh7 42. Qe1 Qe3 43. Nc3 Qxe1 44. Rxe1 {[#]} Rxg3 (44... Rgb8 $142 $1 {...Rb3 is the strong threat.} 45. f4 exf4) 45. Kxg3 $17 Rb8 {Hoping for ...Rb3.} 46. Rb1 Rxb1 (46... Rg8+ {feels hotter.} 47. Kf2 f5 48. Nb5 Rf8 49. exf5 Bxf5 50. Rh1 Nd3+) 47. Nxb1 $15 {[%mdl 4096] Endgame KBN-KBN} Nd3 48. Nc3 {The position is equal.} Kg6 49. h4 Nf4 50. Bf1 Nh5+ 51. Kf2 Nf4 52. Kg3 Nh5+ 53. Kf2 Nf4 54. Kg3 {Black had all chances to win.  Weighted Error Value: White=0.32/Black=0.26} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.7"]
[White "Kumar, Naman"]
[Black "Paul, Justin"]
[Result "1-0"]
[ECO "B56"]
[WhiteElo "2115"]
[BlackElo "2267"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,111,24,25,104,72,58,34,27,0,33,41,45,0,41,26,54,39,43,0,0,0,0,0,0,0,25,23,27,16,12,18,34,34,36,28,37,24,24,28,40,40,60,64,92,81,75,47,132,112,116,66,70,67,97,94,195,195,217,212,222,235,258,212,291,32,277,238,221,0,38,8,8,8,8,8,51,42,29973,29974,29976,29976,29976,29977,29977,29977,29980,29977,29983,29984,29984,29985,29985,29986,29986,29987]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f3 e5 7. Nb3 Be6 8. Be3 Be7 9. Qd2 O-O 10. O-O-O h6 {B56: Classical Sicilian: Unusual Lines.} (10... a5 $11 {remains equal.}) 11. g4 {[#]} Ne8 $146 ({Predecessor:} 11... a5 12. Kb1 a4 13. Nc1 a3 14. b3 Nb4 15. h4 Rc8 16. g5 Nh5 17. gxh6 Qc7 {0-1 (31) Berry,J-Berisha,E Orlando 2011}) 12. Qf2 Bh4 {White is slightly better.} 13. Qd2 a6 14. Kb1 b5 15. Be2 Ne7 16. f4 {Threatens to win with fxe5.} exf4 17. Bxf4 Ng6 18. Bxd6 Bg5 19. Qd4 Nxd6 20. Qxd6 Qxd6 21. Rxd6 Rfd8 22. Rxd8+ Rxd8 23. Rd1 Rxd1+ 24. Bxd1 Be3 25. Nd5 Bg1 26. h3 Kf8 27. Bf3 Ne5 28. Be2 g5 29. Bf1 Ng6 30. Nd2 Bc5 31. c4 bxc4 32. Nxc4 (32. Kc2 {is interesting.} a5 33. Bxc4 Ne5 34. Bf1 Bf2 35. a4) 32... Bxd5 (32... Nf4 $14) 33. exd5 $16 {[%mdl 4096] Endgame KBN-KBN} Ke7 34. Nd2 a5 35. Ne4 Bd6 36. Kc2 Be5 {[#]} (36... Nh4 $16) 37. Kb3 $1 $18 Nf4 {[#]} 38. d6+ $1 Kd7 39. Ka4 Bxb2 40. Kxa5 Ba3 41. Ka4 $2 (41. Kb6 $18) 41... Bc1 $2 (41... Bxd6 $14 42. Kb5 Ba3) 42. Kb5 Ba3 43. Ka4 $2 (43. Kb6 $18) 43... Bxd6 (43... Bc1 {feels hotter.}) 44. Nxd6 Kxd6 $11 {KB-KN} 45. Kb5 Nd5 46. Bc4 {Hoping for Bxd5.} Nc3+ (46... f5 $5) 47. Kb4 $1 {[%cal Rb4c3]} Nxa2+ $2 {[%mdl 8192]} (47... Ne4 $14) 48. Bxa2 $14 {KB-K3P. White mates.} f6 49. Kc4 Ke5 50. Bb1 Kf4 51. Bg6 f5 52. Bxf5 h5 53. Kd5 h4 54. Ke6 Kg3 55. Kf6 Kxh3 56. Kxg5 {Weighted Error Value: White=0.25/Black=0.34} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.8"]
[White "Quiroga Jaquez, Angel Ivan"]
[Black "Hamley, Ryan"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "2178"]
[BlackElo "2089"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,89,2,19,8,20,19,26,22,39,37,37,37,45,24,31,12,45,31,44,30,46,8,33,22,50,50,68,68,68,52,81,72,81,76,86,53,56,27,38,37,40,33,44,0,53,16,34,0,46,40,97,97,163,136,163,0,248,296,244,220,216,190,200,215,208,204,835,800,1033,996,1103,1105,1014,958,936,879]} 1. Nf3 d5 2. b3 Bf5 3. Bb2 e6 4. g3 h6 5. Bg2 Nf6 6. O-O Be7 7. d3 O-O 8. Nbd2 Bh7 9. Re1 {A07: Réti Opening: New York and Capablanca Systems.} Nbd7 10. e4 dxe4 11. dxe4 {White has an edge.} Nc5 {[%cal Rf6e4]} 12. Ne5 c6 13. Qe2 Qc7 14. Rad1 Rad8 {[#]} 15. h4 $146 ({Predecessor:} 15. f3 Nfd7 16. Ndc4 Nb6 17. Nxb6 axb6 18. Nc4 f6 19. a4 Kf7 20. Ne3 Rxd1 21. Rxd1 {1-0 (65) Bialik,N (1547)-Tyszecki,A (1456) Sypniewo 2020}) 15... Ncd7 16. Nd3 a5 17. f4 Nc5 18. Ne5 Na6 19. a3 {[%cal Ba2a3,Ba3b4][%mdl 32]} Bc5+ 20. Kh2 Bd4 21. Bxd4 Rxd4 22. c3 Rdd8 23. b4 axb4 24. axb4 Nb8 25. Bf3 Nbd7 26. Nxd7 Rxd7 27. Nc4 Rfd8 28. Rxd7 Qxd7 29. Qf2 Qe7 (29... Bxe4 $1 $11 30. Rxe4 Qd3 {[%mdl 64] Double Attack}) 30. e5 Nd5 31. Bxd5 Rxd5 32. Nd6 Rd3 (32... Bf5 $14) 33. Ra1 $16 {Ra8+ is the strong threat.} Bg6 (33... Qd8 $16) 34. Ra8+ $18 Kh7 35. Qa7 $2 (35. h5 $18 Bf5 36. Ra7) 35... Rxc3 $2 (35... Bh5 $11 {and Black stays safe.}) 36. Qb8 {[%csl Ga8][%cal Rb8h8]} Rc2+ 37. Kg1 $1 {[%csl Ga8][%cal Rb8h8][%mdl 1024] White has strong compensation.} Bh5 38. Ra7 $40 {[%mdl 128] White is out for blood.} ({Stronger than} 38. Qxb7 Qxb7 39. Nxb7 Bf3 $15) 38... Rc1+ 39. Kf2 $1 Rc2+ {[#]} 40. Ke1 $1 Re2+ $2 (40... Rc1+ 41. Kd2 Rd1+ 42. Kc2 Rd5) 41. Kf1 {White is clearly winning.} Rd2 42. Rxb7 Rd1+ 43. Kf2 Rd2+ {[#]} 44. Ke3 $1 {[%cal Re3d2]} Re2+ 45. Kd3 {Weighted Error Value: White=0.14/Black=0.33} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.9"]
[White "Park, Evan"]
[Black "Oberoi, Shelev"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2173"]
[BlackElo "2133"]
[Annotator "TA"]
[PlyCount "162"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,162,70,83,87,85,102,85,95,90,171,180,178,169,200,181,171,171,200,181,200,129,132,129,134,133,133,117,116,70,69,0,0,0,20,24,24,0,16,-55,59,54,100,94,157,47,100,82,98,95,97,98,83,0,0,0,0,0,0,0,0,0,0,-3,0,-12,-12,-15,-13,-8,0,-3,-3,-3,8,11,39,42,36,33,32,0,52,7,118,116,116,123,117,72,99,18,6,8,65,0,38,0,0,0,28,0,0,0,0,0,0,0,0,-123,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 c6 6. Bc4 Bf5 7. Ne5 {[%csl Ge5][%cal Rc4f7]} e6 {B01: Scandinavian Defence.} 8. g4 $1 {[%cal Rg4f5]} Bg6 {[#]} 9. h4 $1 Bb4 {White is better.} 10. f3 {[#]} h5 $146 (10... Nd5 $16) ({Predecessor:} 10... Nd5 11. Bd2 Bxc3 12. bxc3 b5 13. Bxd5 Qxd5 14. h5 f6 15. hxg6 fxe5 16. Rxh7 Rg8 {0-1 (40) Ragger,M (2659)-Laznicka,V (2654) Novy Bor 2017}) 11. Nxg6 $18 fxg6 12. Qd3 ({Resist} 12. Bxe6 $6 Qd6 $14) 12... Kf7 13. gxh5 Rxh5 14. Bg5 Qa5 {[#]} 15. Rg1 $1 Qf5 16. O-O-O b5 {Threatens to win with ...Bxc3.} 17. Bb3 Qxd3 18. Rxd3 Nbd7 19. Re3 Nf8 20. Ne2 Bd6 21. c3 (21. Rc3 $14) 21... Nd5 $11 22. Re4 Nh7 23. Bf4 Be7 24. Bc2 Rh8 25. Bg3 (25. Bd2 $11) 25... Nf8 (25... g5 $1 $15) 26. Nf4 $36 {[%mdl 2048] Black is under pressure.} Nxf4 27. Rxf4+ Ke8 (27... Kg8 $142) 28. Rg4 (28. Be4 $16 Bd6 29. Bxc6+ Ke7 30. Re4) 28... Kf7 (28... Kd7 $14) 29. Be5 {[%cal Rg4g6]} R8h6 30. Bf4 Rh8 31. Be4 c5 32. Bxg6+ (32. Be3 $16) 32... Nxg6 $11 33. Rxg6 Bf6 34. Be5 Bxe5 35. dxe5 {[%mdl 4096] Endgame KRR-KRR} R8h7 36. R6g2 Rxe5 37. Rd2 Ke7 38. Rgd1 Rxh4 39. Rd7+ Kf6 40. Rxa7 Rh2 41. Rd2 Re1+ 42. Kc2 $1 Rhh1 (42... Ree2 {is more complex.} 43. Rxe2 Rxe2+ 44. Kc1 Rf2 45. Ra5 g5) 43. Kb3 Rhf1 (43... b4 $5) 44. Ra5 Rxf3 45. Rxb5 Rf5 46. Rd8 Ke7 (46... g5 $11) 47. Rc8 Ree5 (47... c4+ $11 {keeps the balance.} 48. Kb4 (48. Kxc4 Re4+ 49. Kd3 Rxb5 $11) 48... Rxb5+ 49. Kxb5 Re2) 48. Rb7+ $16 Kf6 49. a4 g5 50. Rg8 Rd5 51. Kc4 (51. Rbg7 $16) 51... Rf4+ $11 52. Kb5 {aiming for a5.} c4+ (52... Rd2 $11 53. Kxc5 Rxa4) 53. Kb6 ({Better is} 53. Kb4 $14) 53... Rd6+ 54. Ka7 Rf5 55. Rb5 Rdd5 56. Rxd5 (56. Rb4 $5 {[%cal Rb4c4]}) 56... Rxd5 {KR-KR} 57. Ka6 e5 58. a5 e4 59. Kb6 e3 (59... Kf7 $5 60. Rh8 $8 e3 $11) 60. a6 (60. Rf8+ $1 $11 Ke7 61. Rf1) 60... Rd6+ (60... e2 $17 61. Re8 Re5 62. Rxe5 Kxe5) 61. Kb5 {a7 is the strong threat. Cut Off at move 61. The position is equal.} e2 62. Re8 Re6 63. Rxe6+ Kxe6 {K3P-K3P} 64. a7 e1=Q 65. a8=Q {Qe8+ would kill now. KQ-KQ} Qe5+ 66. Kxc4 {Black must now prevent Qe8+.} Qe2+ 67. Kb3 Qd1+ 68. Kb4 Qd6+ 69. Kb5 Qd5+ 70. Qxd5+ Kxd5 {KPP-KP} 71. c4+ Ke6 (71... Ke5 $5 72. c5 $8 g4 $16) 72. c5 {White wants to mate with c6.} g4 73. c6 $1 g3 ({Reject} 73... Kd6 $6 74. Kb6 $16) (73... Kd6 $5 74. Kb6 $8 g3 $16) 74. Ka6 $1 {White threatens c7 and mate.} Kd6 $1 {[%cal Rd6c6]} 75. Kb7 g2 76. c7 g1=Q {( -> ...Qg2+)} 77. c8=Q {Strongly threatening Qc6+.} Qg2+ 78. Ka7 {Hoping for b4.} Qf2+ 79. Ka8 Qxb2 80. Qf8+ Kd7 81. Qf5+ Kd8 {White really could win this.  Weighted Error Value: White=0.25/Black=0.25} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.22"]
[Round "7.10"]
[White "Le, Harry"]
[Black "Venkat, Raghav"]
[Result "1-0"]
[ECO "A77"]
[BlackElo "2167"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,117,38,52,30,35,3,26,21,16,16,43,43,41,52,45,50,99,21,25,25,66,69,125,97,133,39,62,55,95,66,125,107,231,227,431,319,341,340,302,330,301,304,322,333,325,301,454,451,467,342,354,0,450,459,412,412,393,402,370,362,968,987,756,298,298,294,293,293,373,351,418,412,395,376,497,491,29961,29964,29964,29963,29968,29969,29970,29970,29970,29972,29971,29971,29976,29977,29977,29978,29978,29979,29980,29981,29981,29981,29981,29982]} 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Nd2 Bg7 8. e4 Nbd7 9. Be2 O-O 10. O-O Re8 11. Kh1 {A77: Modern Benoni: Classical: 9...Re8 10 Nd2: 10...a6 and 10...Nbd7.} Ne5 12. h3 g5 {[#]} 13. f4 $146 {White has an edge.} ({Predecessor:} 13. g4 Ng6 14. Nf3 h6 15. Bd3 Nd7 16. Re1 Nde5 17. Bb5 Rf8 18. b3 Nxg4 19. Qc2 Qf6 {0-1 (19) Baerschneider,A-Frederiks,R ICCF corr 1990}) 13... gxf4 14. Rxf4 Ng6 15. Rf1 Bd7 16. a4 Qe7 17. Ra3 {[%cal Ba1a3,Ba3b3,Bb3b6][%mdl 32]} h6 18. Nb5 (18. Nc4 $16) 18... a6 19. Nc3 Nh7 20. Rb3 Rab8 ({Black should try} 20... Bxc3 $14 21. Rxc3 b5) 21. Rb6 $16 Ng5 22. Bg4 (22. Nc4 $1 $16) 22... Ne5 $1 $14 23. Bxd7 Qxd7 {White now steadily converts the win.} 24. Qh5 Qc7 ({Black should play} 24... Qe7 $14) 25. a5 $16 {[%cal Ba4a5,Ba5b6][%mdl 32]} Nd7 {[#]} (25... Qe7 $16 {was worth a try.}) 26. h4 $1 $18 {[%cal Rh4g5]} Nxb6 $2 (26... Nh7) 27. axb6 Qe7 {Black wants to play ...Nh7.} 28. hxg5 Qxg5 29. Qxg5 ({Much less strong is} 29. Qxf7+ Kh7 $18) 29... hxg5 30. Nc4 {[%mdl 64] Discovered Attack} Bxc3 31. bxc3 Rxe4 32. Nxd6 {[%mdl 64] Double Attack} Rh4+ (32... Re2 {might work better.} 33. Kh2 (33. Nxf7 Rf8 $16) 33... Rd8) 33. Kg1 Rh6 34. Nc4 Rh4 35. Nd6 Rh6 36. Ne4 Rxb6 37. Nf6+ Rxf6 38. Rxf6 {[%mdl 4096] Endgame KRB-KR} Rd8 39. d6 Kg7 $2 (39... a5 40. Bxg5 Rd7) 40. Bxg5 Rd7 41. Rf5 $2 (41. Kf2 b5 42. Ke3) 41... Rxd6 42. Rxc5 Kg6 43. Be3 f6 44. Kf2 b6 45. Rc7 b5 46. Rb7 Kf5 47. Rb6 Rxb6 (47... Rd3 $18 48. Rxa6 Rxc3 49. Rxf6+ Ke5) 48. Bxb6 {KB-K3P. White mates.} Ke4 49. Ke2 f5 50. g3 f4 51. gxf4 Kxf4 {KB-KPP} 52. Kd3 Ke5 53. Kc2 Kd5 54. Kb3 Kc6 {[#]} 55. Ba5 $1 Kc5 56. Bd8 Kd5 57. Kb4 Ke4 58. Kc5 Kd3 59. Ba5 {Weighted Error Value: White=0.32/Black=0.46} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.1"]
[White "Liang, Jason"]
[Black "Vivekananthan, Anish"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2317"]
[BlackElo "2305"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,115,43,33,42,35,54,31,38,20,62,45,59,43,47,16,29,31,33,29,33,20,31,20,28,20,20,18,14,12,20,0,15,0,0,2,9,7,12,8,9,20,11,8,11,0,29,0,9,0,5,5,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 Be7 6. Bd3 Nf6 7. O-O O-O {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} 8. Re1 Re8 9. Nbd2 {[%cal Bb1d2,Bd2f1,Bf1g3][%mdl 32]} Bg4 {White is slightly better.} 10. Nf1 Bh5 11. Ng3 Bg6 {[#]} 12. Bg5 $146 ({Predecessor:} 12. Nf5 Bxf5 13. Bxf5 Nbd7 14. c3 c6 15. Qc2 Qc7 16. Bf4 g6 17. Bd3 Nh5 18. Bh6 {½-½ (40) Bloessl,W (2205)-Haas,S (2240) Germany 2000}) 12... Nbd7 13. Nh4 Nd5 14. Bxe7 Rxe7 15. Nxg6 hxg6 16. Qd2 c6 17. c3 Nf8 18. Bc4 Nf6 19. Rxe7 Qxe7 20. Re1 Qd7 21. Re2 (21. Nf1 {with more complications.} d5 22. Bd3 Ne6 23. h3 c5 24. dxc5 Nxc5 25. Bb1) 21... Re8 (21... d5 {is more complex.} 22. Bd3 Ne6 23. Re1 Re8 24. Nf1 b6) 22. Qe1 Rxe2 23. Qxe2 d5 24. Bd3 Ne6 25. Qe5 Qc7 26. Qxc7 Nxc7 $11 {[%mdl 4096] Endgame KBN-KNN} 27. h4 Ne6 28. Ne2 Ne8 29. f3 Nd6 {The position is equal.} 30. Kf2 Kf8 31. g4 g5 32. hxg5 Nxg5 33. Ke3 Ke7 34. b3 Ne6 35. f4 g6 36. Ng3 g5 37. fxg5 Nxg5 38. Nf5+ Nxf5+ 39. Bxf5 {KB-KN} f6 40. Bc8 b6 41. Bf5 Nf7 42. Kf4 Nd6 43. Bd3 Ke6 44. a4 a5 45. Bh7 Ke7 46. Bg6 Ke6 47. Bd3 Ke7 48. Kf3 Ke6 49. Ke3 Ke7 50. Bc2 Ke6 51. Kf4 Ke7 52. Kg3 Ke6 53. Kf3 Ke7 54. Bb1 Ke6 55. Kf4 Ke7 56. Bh7 Ke6 57. Bg8+ Ke7 58. Bh7 {Weighted Error Value: White=0.04/Black=0.03} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.2"]
[White "Sandoval Mercado, Carlos"]
[Black "Asaria, Danial"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "2298"]
[BlackElo "2284"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,67,-22,-29,-27,-16,-19,-21,-12,-22,-29,-20,-24,-39,-28,-14,-24,-19,-38,-28,-57,-81,-72,-52,-55,-58,-65,-49,-77,-57,-93,-76,-143,-145,-416,-441,-420,-420,-384,-288,-316,-333,-407,-402,-616,-565,-831,-807,-1577,-820,-802,-754,-924,-883,-1795,-1739,-1666,-1612,-3130,-2818,-2812]} 1. d4 d5 2. Nc3 Nf6 3. Bf4 e6 4. e3 Bb4 5. Nge2 O-O 6. a3 {D00: 1 d4 d5: Unusual lines.} Bd6 7. Bg3 c5 {[#]} 8. dxc5 $146 {The position is equal.} ({Predecessor:} 8. Nf4 Nc6 9. dxc5 Bxc5 10. Be2 b6 11. Qd2 Bb7 12. Bh4 Be7 13. O-O-O Rc8 14. Kb1 {0-1 (59) Sethuraman,S (2640)-Bok,B (2591) Berlin 2015}) 8... Bxc5 9. Nd4 Nc6 10. Nxc6 bxc6 11. Bd3 Re8 12. O-O e5 13. e4 Bg4 14. Qc1 Nh5 15. Na4 Nxg3 16. hxg3 Bf8 17. c4 Rc8 18. b4 {[#]} f5 $1 {[%mdl 512]} 19. exf5 e4 20. Qf4 (20. Bc2 $142) 20... h5 $17 21. c5 $2 {[%mdl 8192] This move loses the game for White.} (21. Bc2 $17 {might work better.}) 21... exd3 $19 22. f3 g5 23. fxg6 {Threatening mate with Qf7+.} Be6 24. Rae1 {Hoping for Rxe6!} Qc7 25. Qg5 Bg7 26. Qxh5 (26. Kh2 $142 Qd8 27. Qd2) 26... Qxg3 {Black is clearly winning.} 27. f4 {If White can now play f5 this consolidates a bit.} Bg4 28. Qh7+ Kf8 29. Re5 Re6 30. Nc3 Rc7 31. Nd1 {[#]} Bxd1 $1 {[%mdl 512]} 32. Rf5+ (32. Rxd1 Bxe5) 32... Rf6 ({Avoid the trap} 32... Ke8 $2 33. Qg8+ Kd7 34. Rf7+ Re7 35. Rxe7+ (35. Rxg7 $2 Qe3+ 36. Kh1 Be2 $19) 35... Kxe7 36. Qxg7+ Kd8 37. Qf8+ Kd7 38. g7 $18) 33. Rg5 Qe3+ 34. Kh1 {Weighted Error Value: White=0.91/Black=0.06} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.3"]
[White "Wu, Derek"]
[Black "Quiroga Jaquez, Angel Ivan"]
[Result "0-1"]
[ECO "C84"]
[WhiteElo "2106"]
[BlackElo "2178"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,88,45,43,58,44,58,62,64,61,60,49,50,51,54,56,59,64,68,62,86,55,78,72,89,93,123,104,122,91,93,88,116,0,82,76,117,85,136,0,0,0,39,41,106,77,79,3,12,10,5,6,32,0,0,-50,17,0,302,-29973,-29974,-29967,-29970,-6701,-5712]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 6. O-O Be7 7. Re1 O-O 8. e5 Nd5 9. Nxd4 Nxd4 10. Qxd4 Nb6 11. Bb3 d6 12. exd6 Bxd6 13. Bf4 Bxf4 $1 {13...Bxf4 is better than 13...Qh4.} 14. Qxf4 Be6 {C84: Closed Ruy Lopez: Unusual White 6th moves.} 15. Bxe6 fxe6 16. Qe5 {[#]} Rf6 $146 {White is slightly better.} ({Predecessor:} 16... Kh8 17. Nc3 Nd5 18. Rad1 Qh4 19. g3 Qf6 20. Qxf6 Nxf6 21. Rxe6 Rae8 22. Rde1 Kg8 23. Rxe8 Rxe8 24. Rxe8+ Nxe8 {1-0 (61) Bade,U (2091)-Turek,A (1806) Rowy 2006}) 17. Nc3 Nc4 18. Qc5 Nd6 19. Rad1 Qd7 20. Qe3 Qf7 21. f3 $36 {[%mdl 2048] Black is under pressure.} Qg6 22. Qc5 Qf7 23. b3 Rg6 24. Rd3 Rf8 25. Ne4 Nf5 26. Red1 b6 27. Qc4 a5 28. R1d2 Qe7 29. Rd1 (29. Rd7 $16 Qh4 30. g3) 29... c5 (29... Qf7 $1 $11) 30. c3 $16 h5 31. R1d2 Kh7 (31... Qf7 $142) 32. Ng3 ({White should try} 32. f4 $16) 32... Qg5 33. f4 Qh4 {[%cal Rf5g3]} 34. Qe4 Kg8 ({Black should play} 34... Qg4 $14) 35. Rf3 Qg4 36. Qe5 (36. Qd3 $16) 36... h4 $11 37. h3 Qxf3 $1 38. gxf3 hxg3 39. Qc7 {[#] Black must now prevent Rd8.} Nh4 40. Rd3 (40. Rd8 {with more complications.} Nxf3+ 41. Kg2 Nh4+ 42. Kg1 Nf3+) 40... g2 (40... Kh7 $1 $15 41. Qxb6 Rf5) 41. Qxb6 {Strongly threatening f5.} Rxf4 $2 {[%mdl 8192]} (41... e5 $11 {and Black has nothing to worry.} 42. Qxc5 Rg3) 42. Qxa5 $4 {[%mdl 8192]} ({Don't blunder} 42. Qxc5 $2 Nxf3+ 43. Rxf3 Rxf3 $19) (42. Rd8+ $18 Kh7 {[#]} 43. Rh8+ $1 {[%mdl 576] Decoy} Kxh8 44. Qb8+ {[%mdl 64] Double Attack} Kh7 45. Qxf4) 42... Nxf3+ 43. Rxf3 Rxf3 44. Qd8+ Rf8 {Weighted Error Value: White=0.49/Black=0.36} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.4"]
[White "Stearman, Josiah"]
[Black "Chen, Ryo"]
[Result "0-1"]
[ECO "E73"]
[WhiteElo "2391"]
[BlackElo "2165"]
[Annotator "TA"]
[PlyCount "152"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,152,43,36,41,52,47,28,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,24,18,18,0,6,8,93,95,59,62,62,62,57,61,62,76,265,258,212,158,158,127,124,87,87,73,72,74,83,33,45,0,0,0,85,69,66,83,60,45,45,45,41,41,42,42,44,44,34,10,14,14,14,14,10,-3,-4,-37,0,-56,0,-188,0,0,0,0,0,-8,-19,-325,-298,-435,-426,-426,-425,-417,-363,-525,-517,-829,-803,-1336,-1720,-1964,-1811,-2006,-1906,-2501,-2289,-2073,-1510,-1243,-819,-2453,-2361,-2169,-2171,-1575,-1421,-29971,-29973,-29972,-29973,-29980,-29981,-29986,-29987,-29987,-29985,-29985,-29986,-29989,-29990,-29990,-29991,-29995,-29996,-29996,-29997]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Be3 c5 7. d5 e6 8. Nf3 {E73: King's Indian: Averbakh Variation without 6...c5.} exd5 9. cxd5 b5 {Threatening ...b4.} 10. Bxb5 {White has an edge.} (10. e5 {looks sharper.} Ng4 11. Bg5 Qb6 12. exd6 b4 13. Ne4) 10... Nxe4 $1 11. Nxe4 Qa5+ 12. Qd2 Qxb5 13. Nxd6 Qxb2 14. Qxb2 Bxb2 15. Rb1 Bc3+ {[#]} 16. Nd2 $146 ({Predecessor:} 16. Bd2 Bxd2+ 17. Kxd2 Na6 18. Rhe1 Rd8 19. Nxc8 Raxc8 20. Rb7 Nc7 21. Rxa7 Nb5 22. Rb7 Rxd5+ {½-½ (28) Brondum,E (2164)-Kaminik,A (2314) Hockenheim 2007}) 16... Na6 17. O-O Bxd2 18. Bxd2 Nc7 19. Nxc8 Raxc8 20. d6 $36 {[%mdl 2048] White has good play.} Ne6 (20... Nd5 $1 $11 {keeps the balance.}) 21. Ba5 $16 Rc6 22. d7 Ra6 23. Rb5 {Strongly threatening Rd1.} Rd6 $1 24. Rb7 Ra6 25. Bc3 $1 Nd4 $2 (25... Rd6 $16 {is a better defense.}) 26. Re1 $18 Rd6 27. Kf1 {Hoping for Bxd4.} ({But not} 27. Rxa7 $6 Nb5 $16) 27... Kg7 28. Re7 Kf6 29. Re4 Rd8 30. Rc7 Rd5 31. Rxa7 R8xd7 32. Ra5 g5 33. f3 Kg6 34. Re8 Rd8 (34... Ne6 $11) 35. Rxd8 $16 Rxd8 36. Rxc5 {[%mdl 4096] Endgame KRB-KRN} Ne6 37. Rc4 Rd1+ $1 38. Kf2 Rc1 39. a4 Rc2+ 40. Kf1 Rc1+ 41. Ke2 Rc2+ 42. Kd3 Rxg2 43. Bd2 {aiming for a5.} Rxh2 44. a5 {And now a6 would win.} Rh1 $1 45. Bc1 Rd1+ 46. Bd2 Ra1 47. Rc8 (47. Bc3 $1 $11 Rd1+ 48. Ke4) 47... h5 (47... Ra4 $1 $15 48. Bc3 h5) 48. Bc3 $2 {[#]} (48. Kc4 $1 $11 {and White is okay.}) 48... Rd1+ $2 (48... Ra4 $1 $19 {...h4 is the strong threat.} 49. Kc2 Nd4+ 50. Bxd4 Rxd4) 49. Kc4 Rd7 50. a6 $1 Ra7 51. Rc6 Kf5 {White must now prevent ...h4.} 52. Ba5 $2 {[%mdl 8192]} (52. Bd2 $11) 52... h4 $19 {Threatens to win with ...h3.} 53. Rd6 (53. Bb4 {is the only way for White.} Kf4 54. Bd6+ Kxf3 55. Bb8) 53... h3 54. Kb5 h2 55. Rd1 Kf4 56. Bb6 (56. Kb6 $142 Rd7 57. Rf1 Rd6+ 58. Kb5 Nd4+ 59. Kc5 Rxa6 60. Bc7+ Ke3 61. Bxh2) 56... Ra8 57. a7 (57. Rh1 $142 Kg3 58. Bg1 hxg1=N 59. Rxg1+ Kxf3 60. Rf1+ Ke4 61. Kb6) 57... Kxf3 58. Ka6 g4 59. Rf1+ Kg2 60. Rf2+ Kh3 61. Rxf7 g3 62. Rh7+ Kg4 63. Kb7 {[#]} Rxa7+ $1 {[%mdl 576] Promotion} 64. Bxa7 Ng5 65. Rh8 Nh3 66. Rg8+ Kf3 67. Bb8 h1=Q {Black mates.} 68. Rxg3+ Ke2+ 69. Kc8 Qc6+ 70. Bc7 Nf4 71. Rg7 Nd5 72. Kb8 Kd3 73. Bh2 Nb6 74. Rg3+ Kc4 75. Rg4+ Kb5 76. Rg5+ Ka6 {Black used his chance. Accuracy: White = 53%, Black = 80%.} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.5"]
[White "Le, Harry"]
[Black "Chasin, Nico"]
[Result "1-0"]
[ECO "E04"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,115,10,30,62,64,80,79,179,175,184,166,273,272,319,294,281,286,255,245,246,242,213,218,427,167,602,132,323,294,564,209,215,203,202,205,215,-14,-14,-24,-15,-18,-32,-9,0,0,0,0,0,0,0,0,0,0,79,84,464,453,657,56,809,650,514,360,887,509,12833,12833,12833,12835,12836,12835,12836,12835,12836,12834,12834,12835,12836,12835,12839,12839,12841,12842,12842,12842,12842,12843,12843,12843,12844,12844,12845,12845]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O b5 7. Ne5 Nd5 8. a4 Bb7 9. axb5 axb5 10. Rxa8 Bxa8 11. e4 Nf6 12. Nc3 c6 13. d5 Bd6 {E04: Open Catalan: 5 Nf3.} 14. Bf4 {Strongly threatening dxe6.} Bxe5 15. Bxe5 O-O (15... cxd5 $16 16. exd5 (16. Nxb5 O-O $16) 16... O-O) 16. dxe6 $18 {Threatens to win with Qxd8.} fxe6 17. Bh3 {[#]} Qc8 $146 (17... Kh8 $142 18. Qxd8 (18. Bxe6 b4 $16) 18... Rxd8) ({Predecessor:} 17... Kf7 18. Bd6 Re8 19. e5 Nd5 20. Ne4 Kg8 21. Qh5 g6 22. Qh6 Qd7 23. Ra1 Bb7 24. Ra7 Na6 25. Ng5 {1-0 (25) Askerov,M (2213)-Bajarani,I (2297) St Petersburg 2017}) 18. Qd6 Re8 19. Ra1 Bb7 20. Ra7 Na6 21. Rxb7 {[%mdl 64] Deflection} Qxb7 22. Bxe6+ Kh8 {And now ...Qe7 would win.} 23. Bxf6 Nb8 $2 (23... b4 {was necessary.} 24. Bd7 (24. Bxc4 gxf6 25. Qxf6+ Qg7 $16) 24... Qc7 25. Qxc7 (25. Qxc6 Qxc6 26. Bxc6 Re6 $11 {[%mdl 64] Double Attack}) 25... Nxc7) 24. Be5 $2 (24. Bg5) 24... b4 $2 (24... Qe7) 25. Na4 $2 (25. Bf5 $18 {and the rest is easy. White wants to mate with Qh6!} Kg8 26. Na4) 25... c3 $2 (25... Qe7 $16) 26. bxc3 b3 $2 (26... Qe7 {is a better defense.} 27. Nc5 (27. cxb4 Na6 $18) 27... Na6) 27. c4 $2 (27. f4) 27... Qe7 28. Qxe7 Rxe7 29. Bxb8 ({Not} 29. Nc5 Na6 $11) 29... Rxe6 30. f4 $2 (30. f3 $18) 30... Rxe4 $11 31. Nb2 $1 Re2 32. Be5 Kg8 33. h4 h5 34. Kf1 Rc2 35. f5 Kf7 36. Ke1 Rg2 37. Nd3 Rc2 38. c5 g6 {[#]} (38... Rg2 $11) 39. f6 $1 $16 {Black is on the road to losing.} Ke6 $2 {[%mdl 8192]} (39... Kf8 $16) 40. Kd1 $18 Ra2 (40... Rc4 $142 41. Bb2 Rc2) 41. Kc1 $2 ({White should play} 41. Bb2 $18 {aiming for Kd2.} Ra8 42. Kd2) 41... Kf7 $2 {[%mdl 8192]} (41... Rc2+ $14 42. Kb1 Rh2) 42. Bb2 Ra4 43. Kd2 Ke6 $2 {[#]} (43... Re4 44. Bc3 Re8) 44. Nf4+ $1 {White is clearly winning.} Kf7 (44... Kd7 $142 45. Kd3 Ke8 46. Nxg6 Ra2) 45. Nh3 Ra2 46. Ng5+ Kf8 47. Kc3 Ra5 48. Kxb3 Rb5+ 49. Ka2 Ra5+ 50. Ba3 Ra4 51. f7 Rg4 52. Bc1 Rxg3 53. Bf4 {White threatens Bd6+ and mate.} Rg2+ 54. Kb3 Rf2 55. Bd6+ Kg7 56. f8=Q+ Rxf8 57. Ne6+ {[%mdl 64] Double Attack} Kf6 58. Nxf8 {Weighted Error Value: White=0.70/Black=0.90} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.6"]
[White "Tello Chavez, Isaac Valent"]
[Black "Kumar, Naman"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2275"]
[BlackElo "2115"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,83,11,0,0,-1,2,-16,-3,-7,-5,-28,-29,-14,-7,-10,-26,-14,-11,-27,-27,-11,17,13,29,30,27,0,0,0,55,47,46,41,35,12,21,21,69,41,46,41,50,15,121,96,125,139,93,75,60,0,145,42,160,139,253,240,258,266,394,408,408,382,735,737,723,700,2006,1985,29997,29998]} 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 {[%cal Bb8c6,Bc6d4,Bd4e2][%mdl 32]} 5. e4 e6 6. Nge2 Nge7 7. d3 d6 8. Be3 Nd4 {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7.} 9. Qd2 a6 10. Rb1 Nec6 {The position is equal.} 11. O-O O-O 12. Bg5 Qa5 13. a3 Nxe2+ 14. Nxe2 Qxd2 15. Bxd2 {[#]} Bd7 $146 ({Predecessor:} 15... Ne5 16. f4 Nxd3 17. b3 b5 18. Bc3 Rb8 19. Bxg7 Kxg7 20. cxb5 Rxb5 21. Rfd1 c4 22. bxc4 Rxb1 23. Rxb1 {0-1 (64) Kusnetsov,I (2125)-Melnichuk,M (2223) Kiev 2007}) 16. Bf4 e5 17. Be3 b6 18. Nc3 Be6 19. b4 Rfb8 20. Rb2 cxb4 21. axb4 {[%cal Ba3b4,Bb4b5][%mdl 32]} Nd4 (21... b5 $11) 22. b5 a5 23. Na4 Ra7 24. Bxd4 exd4 25. f4 f5 26. Re2 fxe4 27. Bxe4 Bg4 28. Ree1 Re7 (28... Bh3 $11 {keeps the balance.}) 29. Kg2 $16 Bd7 30. h3 Bf6 31. Rh1 Kg7 32. Kf3 ({Better is} 32. Bc6 $14 Bxc6+ 33. bxc6) 32... Kg8 {[#]} (32... h5 $11) 33. h4 (33. g4 $1 $16) 33... Kg7 {[#]} (33... h5 $1 $14) 34. g4 $1 {Hoping for g5.} Ree8 (34... Kf8 $16 35. g5 Bg7) 35. g5 $18 Bd8 36. h5 Rf8 (36... Bc7 $142 37. hxg6 hxg6) 37. hxg6 hxg6 {...Bxg5 is the strong threat.} 38. Rh6 Bf5 $2 (38... d5) 39. Reh1 {Threatening mate with Rh7+.} Bxe4+ 40. Kxe4 Rf7 {[#]} 41. Rh8 $1 {[%csl Gh8][%cal Rh1h7][%mdl 512]} Re7+ 42. Kd5 {Accuracy: White = 80%, Black = 51%.} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.7"]
[White "Lu, Jason"]
[Black "Sheng, Joshua"]
[Result "0-1"]
[ECO "B20"]
[WhiteElo "2025"]
[BlackElo "2474"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,96,-22,-10,-65,-74,-70,-57,-64,-35,-63,-55,-92,-94,-101,-93,-103,-108,-128,-118,-124,-123,-129,-114,-107,-98,-122,-101,-190,-200,-201,-198,-189,-190,-195,-187,-218,-217,-207,-162,-152,-148,-156,-152,-176,-159,-222,-231,-187,-220,-235,-222,-234,-245,-241,-239,-248,-239,-243,-230,-395,-406,-404,-404,-399,-410,-435,-439,-424,-409,-732,-725,-651,-358,-351,-359,-645,-645,-645,-645,-5418,-5410,-5410,-5402,-29975,-29973,-6149,-6206,-6159,-5939]} 1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Nf3 e6 6. c4 {B20: Sicilian: Unusual White 2nd moves.} ({White should try} 6. d4 $11) 6... bxc3 $1 $15 7. Nxc3 Qd8 8. d4 {[#] Black is slightly better.} Nf6 $146 ({Predecessor:} 8... a6 9. Bd3 Be7 10. O-O Nf6 11. Bb2 O-O 12. Ne4 Nbd7 13. Ne5 Nd5 14. Qf3 N7f6 15. Nxf6+ Nxf6 {1-0 (33) Schlag,F-Marschall,J Bad Woerishofen 1992}) 9. Bb5+ Bd7 {aiming for ...Bxb5.} 10. Bd3 Bc6 11. O-O Nbd7 12. Bg5 Be7 13. Bc2 Nd5 14. Ne4 O-O 15. Qd3 g6 16. Bh6 {[#]} Re8 $1 17. Rfe1 N7f6 18. Ned2 (18. Ne5 $17 {was called for.}) 18... Ng4 $19 19. Be3 Rc8 20. Bb3 Qa5 21. Nc4 Qa6 22. Qd1 Nc3 23. Qd3 Bd5 {[%cal Rc8c4]} 24. Qxc3 Bxc4 25. Bd1 b5 26. Qb2 Qb7 27. Nd2 (27. Bg5 $17) 27... Nxe3 28. fxe3 Bd5 29. Rb1 a6 ({Stronger than} 29... Bxg2 30. e4 $11) 30. e4 Bc6 31. Bf3 Red8 32. Nb3 Qa7 33. Kh1 a5 34. Rbd1 $2 (34. d5 {was worth a try.} exd5 35. Nd4) 34... b4 35. axb4 Bxb4 36. Rf1 a4 37. d5 {With the idea Nd4.} a3 ({Not} 37... axb3 38. dxc6 Rxd1 39. Bxd1 $17) 38. Qf6 exd5 39. Nd4 (39. Bg4 $142 Bb5 40. Bxc8 Rxc8 41. Rc1) 39... Ba4 40. exd5 Bc3 41. Rd3 {Threatens to win with Rxc3!} Bb2 {Strongly threatening ...a2.} 42. Bg4 $2 (42. Rd2 Bd7 43. d6) 42... a2 {Hoping for ...Rb8.} 43. Bxc8 Rxc8 44. Nc6 Bxf6 45. Nxa7 Rb8 {( -> ...Rb1!)} 46. Ra3 {[#]} Rb1 $1 {[%cal Rb1f1][%mdl 512]} 47. g3 Rxf1+ 48. Kg2 a1=Q {Accuracy: White = 54%, Black = 92%.} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.8"]
[White "Oberoi, Shelev"]
[Black "Tsay, Vincent"]
[Result "1/2-1/2"]
[ECO "C18"]
[WhiteElo "2133"]
[BlackElo "2266"]
[Annotator "TA"]
[PlyCount "181"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,181,21,-6,37,14,18,23,30,27,32,26,56,52,52,33,31,31,63,56,62,50,52,20,55,60,68,55,69,68,77,69,69,54,70,45,97,91,91,89,90,90,91,91,91,91,91,64,92,92,100,62,64,65,87,46,76,76,81,79,75,57,52,52,126,21,35,0,0,0,0,0,0,-14,-14,-175,-167,-224,-222,-226,942,-22,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-74,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Ba5 6. b4 cxd4 7. Nb5 Bc7 8. Nf3 (8. Qxd4 Nc6 $15) 8... Bd7 $1 {[%mdl 4] outshines the older 8...Nc6. C18: French: 3 Nc3 Bb4: Main line: 7 h4 and 7 Qg4.} 9. Nbxd4 Nc6 (9... Ne7 {is interesting.} 10. Bd3 Ba4 11. Qe2 h6 12. O-O a6) 10. Nxc6 bxc6 {[#] White has an edge.} 11. Bd3 $146 ({Predecessor:} 11. Ba6 Qb8 12. Qe2 Ne7 13. O-O Ng6 14. Re1 Bc8 15. Bd3 a5 16. b5 Bd7 17. a4 cxb5 18. axb5 {1-0 (31) Schmittdiel,E (2473)-Sondermann,D (2064) Oberhausen 2010}) 11... a5 12. Be3 Ne7 13. O-O Ng6 14. Bxg6 hxg6 15. Qd4 Bc8 16. Rfe1 Rh5 17. g4 Rh8 18. Qf4 Ba6 19. Bc5 Qd7 20. Qg5 Bd8 21. Qe3 a4 22. Kg2 Be7 23. Rad1 Bb5 24. Ng5 Bxc5 (24... Bxg5 $14 25. Qxg5 Qd8) 25. bxc5 $16 (25. Qxc5 $6 Qa7 $11) 25... Qe7 26. f4 Rb8 27. Rb1 Kd7 28. Rb4 Rhd8 29. Qd4 {And now c4 would win.} Kc8 30. Re3 Rh8 31. h3 Rd8 32. Nf3 Qa7 33. Nd2 Qe7 34. Nb1 Rd7 35. Nc3 Rdb7 36. Rf3 Ra7 37. f5 ({Of course not} 37. Nxb5 Rxb5 38. Rxb5 (38. Rxa4 Rxa4 39. Qxa4 Qxc5 $17) 38... cxb5 $11) 37... gxf5 38. gxf5 Qg5+ {[#]} ({Better is} 38... exf5 $14 39. Rxf5 (39. Nxb5 Rxb5 40. Rxb5 cxb5 $11) 39... Ba6) 39. Kh2 (39. Qg4 $1 $16 {[%cal Rg4g5]} Qxg4+ 40. Rxg4 (40. hxg4 exf5 41. gxf5 Re7 $14)) 39... exf5 $11 40. Nxb5 Rxb5 41. Rxb5 cxb5 {[%mdl 4096] Endgame KQR-KQR} 42. c6 Rc7 43. Qc5 Qe7 44. Qxb5 $2 (44. Qxd5 $11 {and White is okay.} Qe6 45. Qxb5) 44... Qxe5+ $19 45. Kg2 (45. Rg3 $142) 45... Qe4 46. Qc5 {Threatening mate with Qf8+.} Qe7 $4 {[%mdl 8192] [#]} (46... Re7 $19 47. Kg1 g6) 47. Qxd5 $2 ({White must play} 47. Re3 $1 $18 {[%mdl 512]} Qg5+ 48. Kh1) 47... Qe6 (47... g6 {is more complex.} 48. Qa5 Ra7 49. Qb5 Qe4 50. Kg3 f6) 48. Qxf5 Rxc6 49. Qxe6+ fxe6 $11 {KR-KR} 50. c3 Kd8 51. Kf2 Ke7 52. Ke2 Rc4 53. Kd3 Rh4 54. Rg3 Kf6 55. Rf3+ Ke5 56. Re3+ Kd5 57. Rg3 e5 58. Rxg7 Rxh3+ 59. Kc2 Rh2+ 60. Kd3 e4+ 61. Ke3 {Cut Off at move 61} Rh3+ 62. Kd2 Kc4 63. Re7 Rh2+ 64. Ke3 Kxc3 {White must now prevent ...Ra2.} 65. Rxe4 Kb3 66. Kd3 Rh8 {Threatens to win with ...Rd8+.} 67. Rb4+ Kxa3 68. Rb7 Rc8 {Strongly threatening ...Ka2.} 69. Kd2 Ka2 {...a3 is the strong threat.} 70. Kd3 a3 71. Kd2 Ka1 {aiming for ...Rc4.} 72. Kd1 (72. Rg7 $11) 72... a2 ({Black should play} 72... Rc6 $17) 73. Kd2 {The position is equal.} Rh8 74. Kc2 Rh2+ 75. Kc1 Rh1+ 76. Kc2 Rb1 77. Rh7 Rb2+ 78. Kc1 Rb8 {Hoping for ...Rc8+.} 79. Rc7 Rg8 80. Kc2 Rg2+ 81. Kc1 Rb2 82. Rc8 Rb1+ 83. Kc2 Rb6 84. Kc1 Re6 85. Rc7 Re1+ 86. Kc2 Rb1 87. Rc8 Rb7 88. Kc1 Ra7 89. Kc2 Rb7 90. Kc1 Ra7 91. Kc2 {Weighted Error Value: White=0.30/Black=0.10} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.9"]
[White "Fishbein, Mitch"]
[Black "Park, Evan"]
[Result "0-1"]
[ECO "E36"]
[WhiteElo "2132"]
[BlackElo "2173"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,96,0,0,-4,-18,-20,-9,-7,-18,-16,-22,-28,0,-16,0,-21,-31,-52,-25,-102,-107,-100,-93,-113,-114,-110,-118,-146,-146,-150,-136,-140,-137,-191,-191,-191,-190,-190,-184,-181,-174,-195,-198,-371,-367,-353,-381,-376,-354,-360,-366,-368,-335,-454,-471,-460,-470,-474,-464,-430,-269,-521,-497,-489,-483,-638,-638,-638,-638,-606,-598,-582,-514,-744,-474,-653,-611,-12839,-749,-847,-842,-790,-665]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 d5 6. a3 Bxc3+ 7. Qxc3 dxc4 8. Qxc4 b6 9. g3 {E36: Nimzo-Indian: Classical: 4...d5 5 a3.} Ba6 {9...Bb7 is not played anymore.} 10. Qc2 Nbd7 {[%cal Bb8d7,Bd7c5,Bc5b3][%mdl 32]} 11. Bg2 {The position is equal.} c5 12. O-O Rc8 13. Qd1 Bb7 {[#]} 14. dxc5 $146 ({Predecessor:} 14. Bf4 cxd4 15. Qxd4 Nc5 16. Rad1 Qxd4 17. Nxd4 Bxg2 18. Kxg2 Nd5 19. Bd6 Rfd8 20. Bxc5 bxc5 {½-½ (28) Jonsson,M (2250)-Hammarstrom,U (2194) Sweden 2018}) 14... Nxc5 15. Qxd8 Rfxd8 16. Bg5 Ba6 17. Rfe1 {[#]} (17. b4 $11 Nce4 18. Rfe1) 17... Nb3 $1 $36 {[%cal Rb3a1][%mdl 2048] Black is really pushing. Black converts the advantage convincingly.} 18. Rab1 h6 19. Bxf6 gxf6 20. Bf1 Rc2 21. Red1 Rxd1 22. Rxd1 Bxe2 23. Bxe2 Rxe2 {[%mdl 4096] Endgame KRN-KRN} 24. Rb1 (24. Rd7 $17) 24... Kf8 $19 25. Kf1 Rc2 26. Ne1 Rd2 27. Nf3 Ke7 28. Ke1 Rc2 29. Nh4 $2 (29. Kf1 {might work better.}) 29... Nc5 30. Kf1 Nd3 31. b4 Rxf2+ 32. Kg1 Rc2 33. Nf3 Ne5 34. Ne1 Ra2 35. Rb3 Nc4 36. Rc3 b5 37. Nc2 Rb2 38. Kf2 $2 {[#]} (38. a4) 38... Nxa3 $1 {[%mdl 576] Deflection. Black is clearly winning.} 39. Rxa3 Rxc2+ {KR-KR} 40. Kf3 Rxh2 41. Rxa7+ Kf8 42. Rb7 Rh5 43. Rc7 Rd5 44. Ke4 Re5+ 45. Kd4 Rg5 46. Rc5 Rg4+ 47. Kc3 Rxg3+ 48. Kd4 Rg5 {Weighted Error Value: White=0.60/Black=0.18} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "8.10"]
[White "Paul, Justin"]
[Black "Chiu, Isaac"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "2267"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,60,40,47,40,24,24,14,15,21,11,1,44,36,51,46,55,44,31,6,62,21,71,87,85,58,93,-40,-46,-85,-85,-86,100,-41,0,-151,-175,-122,-122,-103,-112,-126,-95,-289,-290,-270,-186,-1081,-1046,-969,-922,-692,-831]} 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. h4 Nf6 5. f3 a6 6. Be3 b5 {[%cal Bb7b5,Bb5b4][%mdl 32] B07: Pirc Defence: Miscellaneous Systems.} 7. Qd2 h5 8. a4 b4 {The position is equal.} 9. Nce2 a5 10. Nf4 {[#]} e6 $146 ({Predecessor:} 10... Nbd7 11. Ngh3 e5 12. dxe5 Nxe5 13. Ng5 O-O 14. O-O-O Qe8 15. Bb5 Bd7 16. Bxd7 Qxd7 {0-1 (32) Douhan,D (2001)-Rahul,K (2225) Stockholm 2016}) 11. Ngh3 $36 {[%mdl 2048] White has good play.} Ba6 12. Bxa6 Nxa6 13. Ng5 Qd7 14. O-O c5 ({Black should try} 14... O-O $11) 15. dxc5 dxc5 16. Qe2 O-O 17. Rad1 Qxa4 18. Rd6 (18. Nfxe6 $16 fxe6 19. Nxe6) 18... Nc7 $15 19. Rfd1 Qb5 20. Qf2 Rfc8 $2 {[#]} (20... e5 $17 21. Ne2 Rfc8) 21. Qg3 (21. Nxf7 $1 $16 {[%mdl 512] aiming for Ne5.} Kxf7 22. Qg3) 21... Qe8 22. e5 $2 (22. Bxc5 $11 e5 23. Nd3) 22... Nfd5 $1 $17 {[%cal Rd5e3]} 23. Nxd5 Nxd5 24. R1xd5 exd5 25. e6 fxe6 {[%mdl 64] Overworked Piece} 26. Rxe6 $2 {[#] This costs White the game.} (26. Nxe6 $17 Rd8 27. Rb6) 26... Qd7 $1 $19 27. Rxg6 {Black must now prevent Ne6!} Rc6 28. Nh3 $2 (28. Rxc6 Qxc6 29. f4) 28... Rxg6 {Black is clearly winning.} 29. Qxg6 Qe8 30. Qd3 {[#]} Qxe3+ $1 {[%mdl 512] Accuracy: White = 51%, Black = 77%.} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.1"]
[White "Chen, Ryo"]
[Black "Liang, Jason"]
[Result "1/2-1/2"]
[ECO "C07"]
[WhiteElo "2165"]
[BlackElo "2317"]
[Annotator "TA"]
[PlyCount "135"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,135,6,18,2,18,14,5,8,22,0,14,-28,-22,-29,-14,-23,0,0,0,0,18,-41,-48,-29,-46,-89,-85,-78,-83,-63,-63,-112,-36,-96,-54,-85,-68,-83,-85,-123,-116,-123,-121,-139,-141,-146,-142,-265,-133,-111,-73,-118,0,0,22,0,7,21,79,79,52,39,50,49,84,81,97,36,50,59,31,18,31,35,33,0,0,0,0,-16,-10,-30,0,0,21,21,21,24,24,24,24,0,0,0,6,0,21,21,22,22,22,16,21,21,21,21,24,21,21,7,8,2,21,17,21,21,29,0,14,0,21,0]} 1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 cxd4 5. Nxd4 Nc6 6. Bb5 Bd7 7. Nxc6 bxc6 8. Bd3 Qc7 9. Qe2 {C07: French Tarrasch: 3...c5, 4 Ngf3 and 4 exd5 Qxd5.} Ne7 10. O-O Ng6 11. Nf3 Be7 12. g3 O-O {[#]} 13. e5 $146 ({Predecessor:} 13. h4 Bd6 14. h5 Ne5 15. Nxe5 Bxe5 16. c3 f5 17. exf5 exf5 18. f4 Bd6 19. Be3 c5 20. Qf2 Rab8 {½-½ (20) Oratovsky,M (2414)-Peralta,F (2586) Barbera del Valles 2020}) 13... c5 14. c3 Bc6 15. h4 Rfd8 16. h5 Nf8 17. h6 g6 18. Ng5 ({Better is} 18. Bg5 $11) 18... Nd7 $15 19. Re1 Rab8 20. c4 dxc4 21. Bxc4 Nb6 22. Bd3 Rd4 23. Nf3 Rd7 ({Black should play} 23... Bxf3 $17 24. Qxf3 Nd7) 24. Nh2 (24. Be4 $15) 24... Qb7 25. Ba6 Qa8 26. Bd2 Rbd8 27. Ba5 Bg5 28. Qg4 Bxh6 29. Qh4 Bg7 30. Ng4 Rd4 31. Bc3 {[#]} (31. Bf1 $17) 31... Ra4 (31... h5 $1 $19 32. Bxd4 Rxd4 {[%mdl 64] Pin} 33. Nf6+ Bxf6 34. Qxf6 c4) 32. Be2 $17 Nd5 {aiming for ...h5.} 33. Qg5 Rxg4 34. Bxg4 $11 h6 35. Qc1 h5 36. Bh3 Nb4 (36... h4 $11 {keeps the balance.}) 37. Bxb4 $16 cxb4 38. Qf4 a5 39. Rac1 Qb7 40. Bf1 Bd5 {[#]} 41. a3 (41. Rc5 $1 $16) 41... bxa3 42. bxa3 Bf8 43. Rb1 (43. Rc3 {feels hotter.} Rc8 44. Rxc8 Qxc8 45. Rc1 Qb8 46. Ba6) 43... Qa7 44. a4 Ba8 {Black wants to play ...Rd4.} 45. Red1 (45. Bg2 {is interesting.} Rd4 46. Qe3 Bc5 47. Rbc1 Bxg2 48. Kxg2 h4 49. Qc3) 45... Rxd1 46. Rxd1 Qb7 $1 {[%csl Ga8][%cal Rb7h1]} 47. Qh4 Be7 48. Qh3 {next Bg2 is good for White.} Qc7 (48... Qb4 {looks sharper.} 49. Rc1 Bf3 50. Rc7 Bg5 51. Rc4 Qb2) 49. Bg2 Bxg2 (49... Qc2 {keeps more tension.} 50. Rf1 Be4 51. Bxe4 Qxe4 52. Qg2 Qxe5 53. Rc1 h4) 50. Qxg2 Qxe5 $11 {[%mdl 4096] Endgame KQR-KQB} 51. Rd7 Qa1+ 52. Kh2 Qf6 53. Rd2 Kg7 54. Qe4 Bb4 55. Re2 Kh7 56. Kg2 Qa1 57. Qc6 Kg7 58. Re3 Qf6 59. Rf3 Qe7 60. Rd3 Qc5 61. Qxc5 Bxc5 {KR-KB} 62. Rc3 Bb4 63. Rc7 Kf6 64. Kf3 g5 65. Rb7 Bc3 66. Rc7 Bb4 67. Rb7 Bc3 68. Rc7 {Weighted Error Value: White=0.16/Black=0.14} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.2"]
[White "Asaria, Danial"]
[Black "Le, Harry"]
[Result "1-0"]
[ECO "E18"]
[WhiteElo "2284"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,89,19,13,24,23,41,30,45,57,66,61,91,67,70,75,97,109,139,131,122,136,206,202,277,273,281,278,307,308,397,394,402,402,512,506,647,627,629,627,731,679,686,687,676,669,735,720,772,776,772,763,1043,1042,987,980,1214,1178,1167,1140,1032,966,993,993,975,-29993,-564,-600,995,911,957,935,1133,1126,1099,1088,1045,1014]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Re1 {is the new trend.} Na6 8. Nc3 Ne4 {E18: Queen's Indian: Old Main Line (4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3).} 9. h4 {[#]} c5 $146 ({Predecessor:} 9... d6 10. Nxe4 Bxe4 11. Ng5 Bxg2 12. Kxg2 h6 13. Nf3 c5 14. d5 exd5 15. Qxd5 Nc7 16. Qf5 {½-½ (74) Sargissian,G (2689)-Oparin,G (2613) St Petersburg 2018}) 10. d5 Nxc3 {White has an edge.} 11. bxc3 exd5 12. cxd5 d6 13. Qc2 h6 14. e4 Bf6 15. Bf4 b5 16. Rad1 c4 17. Rb1 Nc5 (17... Qd7 $16) 18. Rxb5 $18 Rc8 19. Be3 a6 20. Rb4 {Strongly threatening Bxc5.} a5 21. Rxc4 Ba6 {[#]} 22. Rxc5 {[%mdl 64] Deflection} dxc5 23. e5 Qxd5 24. exf6 Qd3 25. Qc1 Rfe8 26. fxg7 Bb7 {[#]} 27. Ne5 $1 Rxe5 28. Bxb7 Rce8 29. c4 h5 30. Bd5 Kxg7 31. Rd1 Qf5 32. Qc3 Qg4 {[#]} 33. Bf3 $1 {[%mdl 512]} Qf5 (33... Qe6 34. Bxc5) 34. Bf4 {[%mdl 64] Pin} Kg8 35. Bxe5 Rxe5 36. Rd8+ Kh7 37. Qd3 Re1+ 38. Kg2 Qxd3 39. Rd7 $4 {[%mdl 8192]} Qd4 40. Rxd4 $19 Ra1 $4 {[%mdl 8192]} (40... cxd4 $19 41. c5 d3) 41. Rd3 {White is clearly winning.} Rc1 42. Ra3 f6 43. Bd5 Ra1 44. Rxa5 Kg6 45. a4 {Quite a comeback for White.  Weighted Error Value: White=0.05/Black=0.37} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.3"]
[White "Quiroga Jaquez, Angel Ivan"]
[Black "Vivekananthan, Anish"]
[Result "0-1"]
[ECO "A06"]
[WhiteElo "2178"]
[BlackElo "2305"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,120,10,23,0,8,-2,11,11,0,0,9,8,14,9,12,0,0,0,0,-8,14,9,62,22,54,29,72,57,80,72,75,62,80,71,114,-24,-10,-20,-29,-34,-27,-26,-9,-39,-35,-54,-64,-169,-193,-243,-270,-267,-261,-281,-276,-304,-302,-288,-301,-294,-289,-295,-282,-283,-279,-321,-312,-318,-272,-355,-337,-388,-385,-699,-699,-671,-673,-578,-563,-563,-563,-526,-436,-563,-436,-563,-563,-563,-563,-563,-563,-563,-563,-563,-556,-556,-556,-548,-541,-518,-504,-4770,-4750,-12843,-12386,-5542,-5871,-29973,-29975,-29975,-29976,-29976,-29977]} 1. Nf3 d5 2. b3 Bg4 3. Bb2 Nd7 4. d4 Ngf6 5. e3 e6 6. a3 {A06: Réti Opening: 1 Nf3 d5.} Bd6 7. Be2 O-O 8. Nbd2 {The position is equal.} c6 9. O-O Qc7 {[#]} 10. h3 $146 ({Predecessor:} 10. Rc1 Ne4 11. h3 Bxf3 12. Nxf3 Rac8 13. c4 Rfe8 14. b4 dxc4 15. Bxc4 Nb6 16. Bd3 {½-½ (47) Noori,M (1627)-Werner,P (1425) Dortmund 2005}) 10... Bf5 11. c4 Ne4 12. Nxe4 Bxe4 13. Nd2 Bg6 14. f4 f6 15. Rc1 Bf7 ({Black should play} 15... Qd8 $11) 16. b4 Rfe8 17. Bd3 Rad8 18. Qf3 Qb8 19. e4 dxe4 20. Nxe4 Be7 21. Rce1 b6 22. c5 (22. d5 $16 {aiming for Ng5!} cxd5 23. cxd5) 22... bxc5 $11 23. dxc5 {[#]} Nxc5 $1 24. Nxc5 Bxc5+ {[%mdl 64] Pin} 25. Kh1 {White wants to play Bxf6.} Bf8 26. Be4 c5 27. Bc6 Re7 28. Qg4 {[#] Black converts the advantage convincingly.} ({White should try} 28. b5 $15) 28... Rc7 $1 $19 {[%cal Rc7c6]} 29. Bxf6 {b5 is the strong threat.} Rxc6 30. Bxd8 Qxd8 31. bxc5 Rxc5 ({Much less strong is} 31... Bxc5 32. Rc1 $19) 32. Re3 Rd5 33. Qf3 h6 34. Rc1 Rf5 35. Qe4 Qb8 36. Rf3 a5 37. Rb1 Qd6 38. Rc1 Rd5 39. Qa4 h5 40. Kh2 Rd4 41. Qxa5 (41. Rc4 e5 42. Rxd4 Qxd4 43. Qxa5) 41... Rxf4 42. Kh1 Rxf3 43. gxf3 Qxa3 44. Qxa3 Bxa3 45. Rc8+ Kh7 46. Kg2 Bb2 47. Rc7 Bg6 48. Rc5 Bf5 49. Rb5 Bf6 50. Ra5 Kg6 51. Ra4 h4 52. Rb4 Kg5 53. Ra4 Be5 54. Ra7 g6 55. Ra5 (55. Ra4 $142) 55... Bd4 56. Ra3 Kf4 57. Rb3 e5 58. Rb4 Be6 {Black mates.} 59. Rb5 Bc4 60. Rb8 Bd5 {Weighted Error Value: White=0.35/Black=0.15} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.4"]
[White "Sheng, Joshua"]
[Black "Wu, Derek"]
[Result "1-0"]
[ECO "B67"]
[WhiteElo "2474"]
[BlackElo "2106"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,69,47,43,47,44,44,62,51,50,50,39,39,39,45,41,40,107,107,101,87,101,98,110,80,187,185,175,172,178,104,114,121,121,114,124,98,197,119,191,195,195,187,197,126,589,554,29981,29982,29992,29993,29993,29994]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 h6 10. Bh4 b5 11. Bxf6 {B67: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 Bd7, lines without 9 f4 Be7.} gxf6 12. Kb1 Qb6 13. Nxc6 $1 {[%mdl 4] White is slightly better. is more profitable than 13.Nce2 at the moment.} Bxc6 14. f5 b4 15. Ne2 {[%cal Bc3e2,Be2g3,Bg3h5][%mdl 32]} e5 16. Ng3 {[#]} Qc5 $146 ({Predecessor:} 16... h5 17. Bc4 Rd8 18. Qe2 h4 19. Nh5 Ke7 20. g4 Bh6 21. Bxa6 d5 22. exd5 Bxd5 23. Rhe1 Bxa2+ 24. Kxa2 Ra8 25. Kb3 Rxa6 26. Rd5 Qc6 27. Qb5 Rc8 28. Qxb4+ {1-0 (28) Shomoev,A (2553)-Gutenev,A (2398) Cheliabinsk 2016}) 17. Bd3 a5 (17... h5 $1 $14) 18. Qe2 $16 a4 19. Nh5 (19. Bc4 {looks sharper.} Be7 20. b3 Ra7 21. Rhe1 Kd7 22. Qh5) 19... Be7 20. Bc4 Rg8 21. g4 Rxg4 {[#]} 22. Bxf7+ $1 $18 {[%mdl 512]} Kxf7 23. Qxg4 Rg8 24. Qe2 ({White should try} 24. Qf3 $18) 24... a3 25. Ng3 axb2 26. Qh5+ Kf8 {White must now prevent ...b3!} 27. Rhe1 Bb5 (27... d5 $16) 28. Rd5 (28. Nf1 $1 $18) 28... Qc3 (28... Qc6 $16 {was called for.}) 29. Qxh6+ Kf7 30. Qh5+ ({Much less strong is} 30. Rxb5 $6 Qxe1+ 31. Kxb2 Qc3+ 32. Kb1 Rg5 $14) 30... Kf8 {[#]} 31. Red1 (31. Qd1 $1 $18 Ba6 32. Qd2) 31... Bc4 {[%mdl 8192] Loses the game.} (31... Ba6 $16 32. Qh7 Rg5 33. Qh8+ (33. Nh5 $2 Rg2 $19) 33... Rg8) 32. Ra5 {aiming for Ra8+.} Bf7 33. Ra8+ {White mates.} Kg7 34. Qg4+ Kh7 35. Qh4+ {Weighted Error Value: White=0.12/Black=0.69} (35. Rxg8 $2 {[#] leads to mate.} Bxa2+ $1 {[%mdl 576] Back Rank} 36. Kxa2 Qa3+ 37. Kb1 Qa1#) 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.5"]
[White "Chiu, Isaac"]
[Black "Tello Chavez, Isaac Valent"]
[Result "1/2-1/2"]
[ECO "D85"]
[BlackElo "2275"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,72,35,79,31,42,-7,36,28,18,0,-4,-25,-20,-22,-19,-7,11,0,9,16,20,-7,-14,-17,-14,-12,-6,-49,-34,-47,-42,-44,-53,-49,-47,-57,-58,-86,-58,-94,-96,-82,-76,-85,-52,-50,-45,-42,-49,-41,-42,-36,-17]} 1. Nf3 d5 2. c4 c6 3. e3 Nf6 4. Nc3 g6 5. d4 Bg7 6. Be2 O-O 7. O-O Nbd7 8. cxd5 Nxd5 9. e4 Nxc3 10. bxc3 c5 11. Be3 Qa5 12. Qd2 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} Nf6 {[#]} 13. Bd3 $146 ({Predecessor:} 13. Qc2 Bd7 14. Rac1 Ba4 15. Qb1 Qc7 16. Ne5 Rfc8 17. f3 Nd7 18. Nd3 b6 19. Nf2 b5 20. f4 {½-½ (31) Novoselski,Z (2325)-Sedlak,N (2544) Cetinje 2016}) 13... Rd8 14. h3 {White is slightly better.} b6 15. Rfe1 Bb7 16. Bg5 cxd4 17. cxd4 {And now Qxa5 would win.} Qxd2 18. Bxd2 e5 19. Bg5 ({But not} 19. d5 Nxd5 20. exd5 Bxd5 $15) 19... h6 20. Bxf6 Bxf6 21. dxe5 Be7 22. Bc2 a5 23. Red1 b5 24. Rab1 b4 25. Rxd8+ Rxd8 26. Re1 Bc6 {[%mdl 1024] Black has compensation.} 27. e6 f6 28. g4 a4 {[%cal Ba5a4,Ba4a3][%mdl 32]} 29. h4 Kf8 30. Kg2 b3 31. axb3 {[#]} a3 32. Bb1 Rd6 33. b4 {Black is slightly better.} Rxe6 34. Nd4 Rd6 {[%cal Rd6d4]} 35. Nxc6 Rxc6 36. b5 Rc3 {Weighted Error Value: White=0.13/Black=0.06} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.6"]
[White "Park, Evan"]
[Black "Singh, Hersh"]
[Result "1/2-1/2"]
[ECO "C58"]
[WhiteElo "2173"]
[BlackElo "2112"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,109,25,29,50,19,19,34,102,65,64,32,31,32,25,0,0,0,9,1,2,17,31,-22,-18,-8,50,40,165,0,0,8,7,10,66,0,0,40,45,0,95,96,131,85,91,31,30,16,35,35,167,163,204,168,187,149,155,155,145,146,131,112,147,158,135,129,133,-43,-29,-33,-31,-53,-41,-187,-7,-28,16,-22,-20,-23,-23,-37,-6,-12,-12,-14,-10,-80,0,-16,0,-47,-29,-62,-64,-973,1709,-38]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Bd3 Nd5 {C58: Two Knights: 4 Ng5 d5 5 exd5 Na5 sidelines.} 9. Nf3 (9. h4 {is interesting.} Nf4 10. Bf1 Bc5 11. c3 Qd5 12. Qf3) 9... Bd6 10. O-O f5 {[#]} (10... O-O $14) 11. Nxe5 $1 $16 {[%mdl 512]} O-O $1 (11... Bxe5 $2 12. Re1 $16) 12. Re1 {And now Bf1 would win.} Qf6 $1 13. Nf3 g5 $1 {[%cal Rg5g4]} 14. c4 Nf4 15. Bf1 {Strongly threatening d4.} g4 {[#]} 16. d4 $1 gxf3 17. Qxf3 Ne6 {[%cal Re6d4]} (17... Qxd4 $6 18. Rd1 $16) 18. c5 (18. Qc3 $14) 18... Bc7 $1 $11 19. b4 Nxd4 (19... Qxd4 $11 20. Qc3 Qxc3 21. Nxc3 Nb7) 20. Qc3 $14 Nb7 (20... Qh4 21. f4 $16 (21. g3 Qf6 $14)) (20... Rb8 $1 $14) 21. Bc4+ $2 {[#]} (21. Bb2 $1 $18 Rd8 22. Na3) 21... Ne6 $146 ({Predecessor:} 21... Kg7 22. Bb2 Rd8 23. Nd2 a5 24. Nb3 axb4 25. Qxd4 Rxd4 26. Bxd4 Qxd4 27. Nxd4 Kf6 28. Nxc6 Nxc5 29. Nxb4 {1-0 (29) So,W (2770)-Abdusattorov,N (2627) Chess.com INT 2020}) 22. Bb2 Qxc3 23. Nxc3 Kf7 (23... Re8 $11) 24. Re2 {[%mdl 1024] White has compensation.} Re8 25. Rae1 Nbd8 26. b5 Ba5 (26... Kf8 $11) 27. Re5 $1 $16 {[%cal Re5f5]} Kg6 28. R1e3 {Hoping for Rg3+.} f4 29. Bd3+ (29. Rh3 $16 Ng7 30. Bd3+ Kf7 31. Rxe8 Bxh3 32. Rh8) 29... Kf7 $1 $14 30. Rf3 Bxc3 31. Bxc3 {aiming for Rh5.} Bb7 (31... Kf8 $14) 32. Rh3 $36 {[%mdl 2048] White is in control.} (32. Bxh7 $6 cxb5 33. Rh3 (33. Rd3 Ke7 $11) 33... b4 $14) 32... Nf8 33. Bc4+ Nde6 34. Rh6 Rad8 {With the idea ...Rd1+.} 35. h4 $1 Rd1+ 36. Kh2 {Rf5+ is the strong threat.} Rc1 {[#]} 37. Rf6+ $3 {[%mdl 512]} Ke7 (37... Kxf6 $2 {too greedy.} 38. Rxe6+ Kf5 39. Rxe8 $18) (37... Kg7 38. Rexe6) 38. Rfxe6+ ({Stronger than} 38. bxc6 Bxc6 39. Rfxe6+ (39. Rexe6+ Nxe6 40. Rxe6+ {[%mdl 64] Double Attack} Kd7 $15) 39... Nxe6 $15) 38... Nxe6 39. Rxe6+ {[%mdl 64] Double Attack} Kd7 40. bxc6+ $2 (40. Rd6+ $16 Kc7 41. Bf7 $1) 40... Bxc6 $15 41. Rd6+ Kc7 42. Ba5+ Kb7 43. Bb3 {[#]} ({White should try} 43. Be6 $15) 43... Rxc5 $2 (43... Re2 $1 $19 {[%cal Re2f2]} 44. f3 Bxf3) 44. Bd2 f3 (44... Re2 $5 {[%cal Re2f2]} 45. Kg1 f3 46. gxf3 Re7 $11) 45. gxf3 Bxf3 46. Be3 Rc7 47. Rf6 Be4 (47... Bc6 {is more complex.} 48. Rf5 Rg7 49. Rg5 Ree7 50. Kg3 Rg6) 48. Rf4 {Black must now prevent Rxe4!} Bc6 49. Rb4+ Kc8 50. Rc4 (50. Bf4 $11 {keeps the balance.}) 50... Kb7 (50... Re4 $17) 51. Rb4+ $11 Kc8 52. Rg4 Bd7 53. Rg7 Be6 54. Re7 {[%mdl 8192]} Rd7 $4 {[%mdl 8192]} 55. Rxd7 $2 {Never resign too early!  Weighted Error Value: White=0.46/Black=0.28} ({Only move:} 55. Rxe8+ $18 Kb7 56. Bxe6) 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.7"]
[White "Tsay, Vincent"]
[Black "Stearman, Josiah"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2266"]
[BlackElo "2391"]
[Annotator "TA"]
[PlyCount "21"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,21,7,12,0,0,16,7,0,0,0,21,0,0,0]} 1. d4 Nf6 2. Bf4 c5 3. e3 Qb6 4. Nc3 Qxb2 5. Nb5 Nd5 {The position is equal.} 6. a3 {Rb1 is the strong threat. A45: Trompowsky Attack.} a6 7. Rb1 Qa2 {[#]} 8. Ra1 $146 ({Predecessor:} 8. Qc1 axb5 9. Ra1 Qxa1 10. Qxa1 c4 11. Bxb8 Rxb8 12. Qb2 Nc7 13. a4 d5 14. axb5 Bd7 15. b6 Nb5 16. Nf3 f6 17. e4 e6 {0-1 (34) Moroni,L (2530)-Paravyan,D (2653) Lichess.org INT 2020}) 8... Qb2 9. Rb1 Qa2 10. Ra1 Qb2 11. Rb1 {Not much happened in this game.  Weighted Error Value: White=0.03/Black=0.00} 1/2-1/2

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.8"]
[White "Cervantes Landeiro, Thalia"]
[Black "Oberoi, Shelev"]
[Result "0-1"]
[ECO "A53"]
[WhiteElo "2311"]
[BlackElo "2133"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,116,29,39,39,39,47,51,44,58,49,73,75,76,38,82,69,77,78,78,80,71,73,117,63,52,52,61,0,0,0,0,0,0,0,20,0,0,-85,-76,-83,-92,-78,-87,-79,-93,-84,-8,-77,-72,-70,-77,-80,-85,-97,-56,-150,-158,-201,-197,-207,-208,-198,-166,-174,-177,-258,-224,-299,-234,-262,-251,-288,-275,-385,-381,-469,-435,-447,-446,-443,-435,-496,-500,-483,-474,-483,-416,-386,-404,-376,-327,-618,-618,-579,-579,-571,-4539,-2146,-2151,-966,-853,-29975,-29977,-29977,-29978,-29978,-29979,-29978,-29975]} 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. d5 Bf5 5. e3 {[#]} g6 $146 ({Predecessor:} 5... Nbd7 6. Nge2 Be7 7. Ng3 Bg6 8. Bd3 a5 9. O-O Nc5 10. e4 Qd7 11. f3 h5 12. Bc2 h4 {1-0 (45) Rodrigues,J (2125)-Felizes,P (1917) Penafiel 2020}) 6. Nge2 {A53: Old Indian Defence without Nf3.} Bg7 7. Ng3 Bc8 8. e4 {White is slightly better.} O-O 9. Bd3 h5 10. Bg5 Qe8 11. Qe2 c5 12. O-O Na6 13. a3 Nh7 14. Bd2 h4 15. Nh1 h3 16. f3 (16. g3 $16) 16... hxg2 $14 17. Qxg2 Qe7 18. Ng3 (18. Nf2 $14) 18... Qh4 $11 19. Qf2 Bh3 20. Nge2 Bf6 21. Rfd1 Ng5 22. f4 Qg4+ 23. Qg3 (23. Kh1 $1 $11 Qf3+ 24. Qxf3 Nxf3 25. Ng1) 23... Nf3+ $17 24. Kh1 Nxd2 25. Rxd2 exf4 26. Nxf4 Qxg3 27. hxg3 {[#]} Bg4 ({Black should play} 27... Bd7 $1 $17) 28. Kg2 (28. Nb5 $1 $11 {keeps the balance.}) 28... Nc7 {White is on the road to losing.} 29. Be2 Bd7 30. Nd3 Rfe8 31. Bf3 Kg7 32. Ne2 (32. Re1 $15) 32... b5 33. cxb5 Nxb5 34. Rc1 Rac8 35. Rdc2 Bg5 36. Ndf4 a5 37. Rc4 (37. a4 $142 Nc7 38. Nc3) 37... Rb8 $19 38. Rf1 Nc7 39. Rb1 f5 {...Bb5 is the strong threat.} 40. Nc3 Bf6 41. Nfe2 Nb5 42. exf5 Nxc3 43. Nxc3 Bxc3 44. Rxc3 Bxf5 45. Rd1 Rxb2+ 46. Kg1 a4 47. Rdc1 Reb8 48. g4 Bd7 49. Re3 Re8 50. Rce1 {[#]} (50. Rxe8 Bxe8 51. Re1) 50... Rxe3 51. Rxe3 {[%mdl 4096] Endgame Threatening Re7+. KRB-KRB} Kf6 52. Kf1 Rb3 53. Kf2 Rxe3 54. Kxe3 Ke5 55. Kd3 Kf4 {Black mates.} 56. Bd1 Bb5+ 57. Kc3 g5 58. Kd2 Ke4 {Weighted Error Value: White=0.46/Black=0.11} 0-1

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.9"]
[White "Chasin, Nico"]
[Black "Hamley, Ryan"]
[Result "1-0"]
[ECO "E72"]
[WhiteElo "2303"]
[BlackElo "2089"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,62,16,7,25,8,25,-24,-20,-52,-64,-84,-34,-24,54,58,102,102,131,133,129,135,132,136,126,126,133,119,258,274,258,264,577,579,12831,12832,12830,1377,29995,29996,29996,29997,29997,29998,29998,29999,29999]} 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. e4 d6 5. d4 exd4 6. Nxd4 g6 7. Nxc6 bxc6 8. g3 Bg7 9. Bg2 O-O 10. O-O Be6 {E72: King's Indian: 4 e4 d6 5 g3.} 11. Qd3 {[#]} Qc8 $146 ({Predecessor:} 11... Nd7 12. b3 Ne5 13. Qc2 Qf6 14. Bb2 Nf3+ 15. Kh1 Bg4 16. Na4 Qg5 17. Bxg7 Qh5 18. h4 Kxg7 {0-1 (32) Gomez Garcia,J (1936)-Baglan,E (1762) Kemer 2009}) 12. e5 Nd7 {Black has an edge.} 13. f4 Qa6 14. Qf3 Bxc4 15. Rd1 d5 (15... c5 $11) 16. Be3 Qa5 17. Rac1 Rfe8 18. b3 Ba6 19. Nxd5 cxd5 20. Rxd5 {[%mdl 64] Double Attack} Qxa2 {Hoping for ...Nb6.} (20... Bb5 $2 21. a4 $18) 21. Rxd7 Qxb3 22. Qf2 {Threatens to win with Bd5.} Bb7 {This move loses the game for Black.} (22... c6 $16) 23. Bxb7 $18 (23. Rdxc7 Bxg2 24. R1c3 (24. Kxg2 a5 $11) 24... Qb1+ 25. Kxg2 a5 $11) 23... Qxb7 24. Qa2 (24. Rdxc7 Qd5 $16) 24... Re6 $2 (24... Kh8 {is more resistant.} 25. Qxf7 Rg8) 25. Rcxc7 Qe4 26. Rxf7 Qxe3+ {[#]} 27. Kg2 $1 Bf8 {[#]} 28. Rg7+ $3 {[%mdl 576] Back Rank. White mates.} Bxg7 29. Qxe6+ Kh8 30. Rc8+ {[%mdl 64] Back Rank} Rxc8 31. Qxc8+ Bf8 32. Qxf8# {Weighted Error Value: White=0.06/Black=0.69} 1-0

[Event "North American-ch Juniors Open U20 2020"]
[Site "Charlotte"]
[Date "2020.12.23"]
[Round "9.10"]
[White "Kumar, Naman"]
[Black "Sandoval Mercado, Carlos"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2115"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2020.12.06"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,110,0,8,0,29,30,64,64,82,80,83,81,76,87,118,45,47,46,55,34,17,14,33,0,0,0,14,22,63,63,63,63,63,32,63,30,25,-68,-70,-60,0,0,0,0,0,0,0,0,27,31,31,30,3777,-22,-27,-35,-61,-12825,-2932,-2932,-2854,-2854,-2483,-2483,-1858,-1799,-1723,-12836,-12831,-12832,-12830,-12833,-12833,-12833,-12834,-12834,-12835,-12835,-12834,-12833,-9796,-12835,-12835,-12843,-12843,-12844,-12844,-29988,-29989,-29989,-29990,-29990,-29991]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 h5 8. Be3 Be6 9. Qd2 Nbd7 10. O-O-O Rc8 11. Nd5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} Bxd5 12. exd5 Qc7 13. Kb1 {White is slightly better.} Be7 14. c4 b6 {[#]} 15. Be2 $146 ({Predecessor:} 15. h3 h4 16. Be2 a5 17. Na1 Nc5 18. Nc2 Nh5 19. Rhe1 Ng3 20. Na3 Qd7 21. Bd3 {1-0 (46) Robson,R (2670)-Sjugirov,S (2662) chess24.com INT 2020}) 15... a5 16. Na1 Nc5 17. Bxc5 (17. Nc2 $16) 17... Qxc5 $14 18. Nc2 g6 19. h4 Bf8 20. Na3 Bh6 21. Qd3 O-O 22. Nb5 Bf4 23. Nc3 e4 24. Nxe4 Nxe4 25. fxe4 Be5 26. a3 Rc7 27. Rc1 Rfc8 {next ...b5! is good for Black.} 28. Rhf1 (28. a4 $11) 28... b5 $1 $15 {[%cal Rb5c4]} 29. Qd2 $1 (29. cxb5 $2 Qxc1+ 30. Rxc1 Rxc1+ 31. Ka2 R1c2 $19) 29... b4 (29... bxc4 $15 30. Rxc4 Qb6 31. Rxc7 Rxc7) 30. a4 $1 $11 b3 31. g4 hxg4 32. Bxg4 Rb8 {aiming for ...Rb4.} 33. h5 {Threatens to win with hxg6.} Rb4 34. hxg6 f5 35. Bxf5 Rxa4 $2 {[%mdl 8192] [#]} (35... Rxc4 $11 36. Be6+ Kg7 37. Rf7+ Rxf7 38. gxf7 Rxc1+ 39. Qxc1 Qxc1+ 40. Kxc1 Bf4+ 41. Kb1 Kf8) 36. Be6+ $2 (36. Qh6 $2 {is a self mate.} Ra1+ $3 {[%mdl 512]} 37. Kxa1 Qa3+ 38. Kb1 Qxb2#) ({White has to play} 36. Rc3 $1 $18 {Threatening mate with Qh6!} Qb4 {[%mdl 64] Pin} 37. Qh6 $1 (37. Be6+ Kg7 $17) 37... Ra1+ {[%mdl 64] Decoy} 38. Kxa1 Qa4+ 39. Kb1 Qa2+ 40. Kc1 Qa1+ 41. Kd2 Qxb2+ 42. Kd1 Qb1+ 43. Ke2 Qb2+ 44. Kf3 Qxc3+ 45. Kg2 Qg3+ 46. Kh1 Qh2+ 47. Qxh2 Bxh2 48. Kxh2 Rxc4 49. Kg3) 36... Kg7 37. Rc3 $1 {Qg2! would kill now.} Qb4 $40 {[%mdl 192] Pin. Black has some attack.} 38. Qg5 $2 {[%mdl 8192] [#] Black converts the advantage convincingly.} Ra1+ $3 $19 {[%mdl 576] Decoy, Clearance} 39. Kxa1 Qa4+ 40. Kb1 Qa2+ 41. Kc1 Qa1+ 42. Kd2 Qxf1 43. Qd8 Bxc3+ 44. bxc3 {[%mdl 4096] Endgame KQR-KQB} Qf2+ 45. Kd3 Qc2+ 46. Ke3 Qxc3+ {[%mdl 64] Double Attack} 47. Ke2 Qxc4+ 48. Kf3 Qc3+ ({Weaker is} 48... b2 49. Qg8+ Kf6 50. Qf8+ Kg5 51. Qf5+ Kh6 52. Qf8+ Kxg6 53. Qf5+ Kh6 54. Qf6+ Kh7 55. Bf5+ Kg8 56. Be6+ Kh7 57. Bf5+ {[%mdl 64] Discovered Attack} Kg8 58. Be6+ Kh7 $11) 49. Kg4 b2 50. Qg8+ Kh6 {( -> ...Qf6)} 51. Qf8+ {[#]} Qg7 $1 {[%cal Rg7f8]} 52. Qf4+ Kxg6 53. Qf5+ Kh6+ {Black mates.} 54. Kh4 Qe7+ 55. Kg4 b1=Q {[%mdl 32768] Weighted Error Value: White=0.87/Black=0.08. Loss on time!?} 1-0

