[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.11"]
[Round "1.1"]
[White "Checa, Nicolas"]
[Black "Vaidya, Atulya"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "2506"]
[BlackElo "2118"]
[Annotator "ChessBase"]
[PlyCount "83"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00:30]} d5 {[%emt 0:00:00]} 4. Nc3 {[%emt 0:00:17]} Bb4 {[%emt 0:00:00]} 5. Qb3 {[%emt 0:03:16]} c5 {[%emt 0:02:14]} 6. dxc5 {[%emt 0:02:18]} Na6 {[%emt 0:03:34]} 7. a3 {[%emt 0:08:15]} Bxc3+ {[%emt 0:07:19]} 8. Qxc3 {[%emt 0:00:21]} Nxc5 {[%emt 0:04:08]} 9. cxd5 {[%emt 0:03:16]} Qxd5 {[%emt 0:02:02]} 10. Be3 {[%emt 0:03:06]} Nce4 {[%emt 0:03:53]} 11. Qe5 {[%emt 0:00:20]} O-O {[%emt 0:04:26]} 12. Rd1 {[%emt 0:02:31]} Qxe5 {[%emt 0:16:59]} 13. Nxe5 {[%emt 0:00:19]} Nd5 {[%emt 0:00:13]} 14. Bc1 {[%emt 0:03:24]} Nd6 {[%emt 0:05:12]} 15. f3 {[%emt 0:03:22]} f5 {[%emt 0:03:58]} 16. e3 {[%emt 0:01:03]} b6 {[%emt 0:00:37]} 17. Bd2 {[%emt 0:07:28]} Bb7 {[%emt 0:10:02]} 18. Bb4 {[%emt 0:09:02]} Nxb4 {[%emt 0:00:10]} 19. Rxd6 {[%emt 0:02:07]} Nd5 {[%emt 0:00:26]} 20. Bc4 {[%emt 0:02:22]} Rad8 {[%emt 0:08:06]} 21. Rxd8 {[%emt 0:03:39]} Rxd8 {[%emt 0:00:08]} 22. Kf2 {[%emt 0:04:32]} Kf8 {[%emt 0:01:34]} 23. Rc1 {[%emt 0:00:14]} Rc8 {[%emt 0:00:08]} 24. Rd1 {[%emt 0:02:49]} Ke7 {[%emt 0:00:19]} 25. Bb3 {[%emt 0:02:45]} Rc7 {[%emt 0:00:35]} 26. h3 {[%emt 0:04:09]} h5 {[%emt 0:08:31]} 27. h4 {[%emt 0:03:15]} a5 {[%emt 0:01:42]} 28. Rd2 {[%emt 0:03:05]} Kf6 {[%emt 0:00:17]} 29. Nd3 {[%emt 0:01:00]} g5 {[%emt 0:08:01]} 30. hxg5+ {[%emt 0:01:37]} Kxg5 {[%emt 0:00:08]} 31. Bxd5 {[%emt 0:04:10]} Bxd5 {[%emt 0:00:42]} 32. Nf4 {[%emt 0:00:07]} Rc5 {[%emt 0:00:06]} 33. b4 {[%emt 0:03:14]} axb4 {[%emt 0:01:57]} 34. axb4 {[%emt 0:00:24]} Rb5 {[%emt 0:00:04]} 35. Rd4 {[%emt 0:02:24]} Bb3 {[%emt 0:01:48]} 36. g3 {[%emt 0:02:48]} Ba2 {[%emt 0:01:38]} 37. Ke2 {[%emt 0:03:38]} Bb3 {[%emt 0:00:09]} 38. Kd2 {[%emt 0:01:21]} Bd5 {[%emt 0:00:17]} 39. Ke2 {[%emt 0:08:06]} Bb3 {[%emt 0:00:16]} 40. Kd3 {[%emt 0:00:00]} Bd5 {[%emt 0:00:00]} 41. Nxd5 {[%emt 0:01:07]} exd5 {[%emt 0:02:57]} 42. Kc3 {[%emt 0:00:05]} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.11"]
[Round "1.2"]
[White "Jacobson, Brandon"]
[Black "Niemann, Hans Moke"]
[Result "1-0"]
[ECO "E15"]
[WhiteElo "2456"]
[BlackElo "2467"]
[Annotator "RC"]
[PlyCount "73"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]

{[%evp 9,73,-2,37,47,41,22,29,20,27,15,47,33,87,74,83,91,102,103,102,93,94,64,117,100,97,97,130,142,143,120,114,120,123,119,143,106,131,158,143,120,277,281,427,391,562,550,564,552,562,570,562,512,491,536,627,625,620,606,749,727,1815,1743,29969,29972,29962,29954]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qc2 d5 6. cxd5 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations} exd5 7. Bg2 (7. Nc3 Be7 8. Bg2 O-O 9. O-O Bb7 10. Bf4 Na6 11. a3 c5 12. Rfd1 Qc8 13. Be5 Ne4 14. dxc5 Bxc5 {1-0 (35) Sarana,A (2588)-Vavulin,M (2570) Loo 2018}) 7... Bb4+ 8. Nc3 {White has an edge.} O-O 9. O-O Re8 10. Ne5 c6 (10... Bxc3 $14 11. Qxc3 (11. bxc3 Nbd7 $11) 11... Nbd7) 11. Bg5 $146 ({Predecessor:} 11. Rd1 Bb7 12. a3 Bd6 13. Bf4 Qe7 {1-0 (29) Karavade,E (2399)-Gomez Jurado,L (2272) Montcada 2018}) 11... Bxc3 12. Qxc3 Ne4 13. Bxe4 $1 Qxg5 14. Bf3 (14. Qf3 Rxe5 15. dxe5 dxe4 $15) 14... Bb7 15. Rac1 c5 (15... Qe7 $14) 16. h4 (16. Nd3 {seems wilder.} Qf5 17. dxc5 d4 18. Qxd4 Bxf3 19. exf3 Nc6 20. Qc3) 16... Qe7 17. Nd3 {[%cal Rd4c5]} c4 18. Nf4 Rd8 {[#]} 19. b3 $1 b5 20. bxc4 dxc4 21. d5 Qc5 22. a4 a6 {[#]} 23. Nh5 $1 {[%csl Gh5][%cal Rc3g7]} f6 24. Nf4 $36 {[%mdl 2048] Ne6 is the strong threat. White is in control.} Bc8 $2 (24... Re8 $16) 25. Qa5 $18 Re8 (25... Rd6 {might work better.} 26. axb5 Nd7 27. Qd8+ Nf8 28. Rxc4 Rxd8 29. Rxc5 axb5 30. Rxb5 Ng6 31. Nxg6 hxg6) 26. axb5 Ra7 (26... Nd7 $142 27. d6 Ra7) 27. b6 {[%mdl 64] Discovered Attack} Qxa5 28. bxa7 Qb6 29. a8=Q {And now Rb1 would win.} ({Not} 29. axb8=R Qxb8 30. Rxc4 Bd7 $14) ({Weaker is} 29. axb8=B Bd7 $11) 29... Bb7 30. Rb1 Qxb1 31. Qa7 ({Less strong is} 31. Rxb1 Bxa8 32. Rc1 Nd7 $18) 31... Qb4 {[#]} 32. Be4 $1 {[%mdl 512] Hoping for Rb1!} c3 (32... Rxe4 33. Qxb8+) 33. Bd3 {aiming for Rb1.} c2 34. Bxc2 Qc3 35. Qxb7 Qxc2 36. Ne6 {[%csl Ge6][%cal Rb7g7]} Qg6 37. Rc1 {Accuracy: White = 84%, Black = 41%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.11"]
[Round "1.3"]
[White "Yu, Jennifer"]
[Black "Burke, John M"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "2341"]
[BlackElo "2562"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,68,12,9,55,2,13,15,8,0,14,0,22,-12,0,0,0,0,0,0,28,16,20,-74,-69,-50,164,-34,0,-191,-176,-307,-97,-94,-97,-460,-123,-1022,-1017,-1013,-1009,-1003,-986,-951,-989,-1301,-1252,-29986,-29987,-29987,-29988]} 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nc7 7. O-O e5 8. d3 Be7 9. Nd2 O-O 10. Nc4 f6 11. f4 Be6 {A34: Symmetrical English: 2 Nc3, lines with ...d5} (11... exf4 12. Bxf4 Kh8 13. Bxc7 Qxc7 14. Nd5 Qd8 15. Nxe7 Qxe7 16. Bxc6 bxc6 17. Rf2 Be6 18. Rc1 Rfd8 19. b3 {½-½ (58) Soltau,A (2497)-Olofsson,D (2565) ICCF email 2014}) 12. f5 ({Better is} 12. Bxc6 $14 bxc6 13. fxe5) 12... Bd7 $146 ({Predecessor:} 12... Bf7 13. Ne3 Rb8 14. Kh1 Nd4 15. Bd2 Qd7 16. g4 Rfc8 17. b3 b5 18. Rc1 b4 19. Ne4 {1-0 (43) Vokac,M (2343)-Bures,M (2150) Ostrava 2019}) 13. Ne3 Kh8 {The position is equal.} 14. Kh1 b5 15. g4 Nd4 16. Bxa8 Qxa8+ 17. Kg1 g6 18. Ne4 Rg8 {Hoping for ...gxf5.} 19. Ng3 c4 20. fxg6 Rxg6 21. Nef5 {[#]} (21. dxc4 $11 Qc8 22. cxb5) 21... Bc5 $1 $17 {[%cal Rd4e2][%mdl 1024] Black has strong compensation.} 22. e3 Nde6 $2 {[#]} (22... Nxf5 $15 {keeps the upper hand.} 23. gxf5 Rg7) 23. Nh4 $2 (23. dxc4 $1 $18 Bc6 24. h3) 23... Rg8 $15 {...Nf4 is the strong threat.} 24. Qf3 $2 (24. Rxf6 Nf4 $17) (24. h3 $1 $11 {and White is okay.}) 24... Nd5 $19 {Strongly threatening ...Ng5.} (24... Qxf3 25. Nxf3 Rxg4 26. dxc4 $17) 25. Ne4 {[#]} (25. dxc4 $142 Ng5 26. Qg2 (26. Qxd5 $2 Bc6 $19) 26... Nxe3 {[%mdl 64] Double Attack} 27. Qxa8 (27. Bxe3 $2 Bxe3+ 28. Rf2 Bc6 $19) 27... Nxf1+ 28. Kxf1 Rxa8 29. cxb5) 25... Nd4 $1 {[%mdl 512]} 26. exd4 $17 Bxg4 27. Qg3 $2 {[%mdl 8192]} (27. Qg2 $17 {was the crucial defense.} Bh3 {[%mdl 64] Pin, Skewer} 28. dxc5) 27... Be2 $2 (27... Bxd4+ $19 {is more deadly.} 28. Kh1 Be2 {[%mdl 64] Double Attack}) 28. Ng5 $2 {[%mdl 8192]} (28. dxc5 $17 Rxg3+ 29. Nxg3 Bxf1 30. Kxf1) 28... Bxd4+ $19 ({Weaker is} 28... Rxg5 29. Bxg5 Bxd4+ 30. Kh1 $17) 29. Rf2 fxg5 30. Nf5 Bxf2+ 31. Kxf2 Nf4 32. dxc4 Qf8 {Played: Qa8-e4} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.11"]
[Round "1.4"]
[White "Tang, Andrew"]
[Black "Sheng, Joshua"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2495"]
[BlackElo "2449"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,116,16,16,21,12,23,19,13,19,16,10,19,19,18,25,20,19,28,19,18,16,22,20,31,30,22,0,9,12,14,0,0,-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-80,-72,-129,-129,-128,-128,-127,-100,-126,-122,-133,-137,-142,-122,-120,-107,-188,-178,-192,-191,-190,-156,-191,-130,-150,-123,-167,-178,-214,-212,-203,-211,-439,-432,-533,-512,-597,-680,-658,-672,-658,-654,-671,-646,-29978,-29979,-29978,-29979,-29990,-29991,-29991,-29992,-29993,-29992,-29992,-29991,-29991,-29981,-29982,-29983]} 1. Nf3 Nf6 2. d4 e6 3. Bf4 d5 4. e3 Bd6 5. Bxd6 Qxd6 6. c4 b6 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} 7. Nc3 O-O 8. Rc1 Qe7 $146 {The position is equal.} ({Predecessor:} 8... a6 9. cxd5 exd5 10. Bd3 c5 11. dxc5 bxc5 12. O-O Bb7 13. Qb3 Bc6 {1-0 (72) Fedoseev,V (2718)-Akobian,V (2647) Riadh 2017}) 9. cxd5 exd5 10. Bd3 Bb7 11. O-O c5 12. b3 Nbd7 13. Qe2 a6 14. Qb2 Rfc8 15. Ne2 Nf8 16. Rc2 Ne6 17. Rfc1 g6 18. Ng3 a5 19. Bb5 Ne8 20. h4 Nd6 21. Bd3 cxd4 {Hoping for ...Rxc2.} 22. Rxc8+ Rxc8 23. Rxc8+ Bxc8 24. exd4 Nf4 25. Bf1 Bg4 26. Qd2 Qf6 {Threatens to win with ...Bxf3.} 27. Ne5 Be6 28. Qc1 Qxh4 29. Qc6 (29. Qc7 $11 {remains equal.} Ne4 30. Nxe4 dxe4 31. g3) 29... Qd8 $17 30. Ne2 (30. Qc1 $142 g5 31. Nd3) 30... Nxe2+ 31. Bxe2 Nf5 32. Qc3 Qd6 33. Bf3 h5 34. Qd2 Qe7 35. Be2 Qh4 36. Nf3 Qg4 37. Bd1 (37. Bd3 $17) 37... h4 $19 38. Kh2 {[#]} Kg7 $1 39. Qc1 Nd6 $40 {[%mdl 128] Black wants a kill.} ({Stronger than} 39... Nxd4 40. Qc3 $16) 40. Qe3 {Qe5+ is the strong threat.} Qe4 (40... h3 $19 {[%csl Gh3][%cal Rg4g2]} 41. g3 Qe4) 41. Qd2 $17 Bf5 42. Be2 f6 43. Ne1 g5 44. Bf3 Qe6 45. Nc2 $2 {[#]} (45. Kg1) 45... g4 $1 $19 46. Bd1 Ne4 47. Qf4 {[#]} Nxf2 $1 {[%mdl 512]} 48. Ne3 (48. Qxf2 g3+) 48... g3+ 49. Kg1 Bg6 50. Qc7+ Kg8 51. Qc3 Nxd1 {Black mates.} 52. Nxd1 {[#]} Qe2 $1 53. Ne3 {[#]} Qf2+ {Played: Bg6-f5} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.11"]
[Round "1.5"]
[White "Hilby, Craig"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "A14"]
[WhiteElo "2433"]
[BlackElo "2592"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,118,8,6,21,15,22,11,20,0,0,0,0,-18,-16,-13,-25,-21,0,-7,0,-9,-3,-10,0,2,6,0,1,0,0,0,0,0,0,10,39,-6,-8,-8,-2,-8,-5,-6,0,0,-6,0,0,-25,59,0,0,0,0,-35,-38,-37,-38,-54,-23,-93,-90,-83,-70,-130,-70,-103,-9,-109,-105,-107,-31,-102,-99,-377,-377,-365,-367,-297,-104,-361,-372,-395,-387,-450,-430,-500,-493,-427,-364,-740,-364,-346,-294,-277,-228,-230,-235]} 1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. O-O O-O 6. b3 b6 7. Bb2 Bb7 8. e3 c5 9. Nc3 Nbd7 10. Qe2 Rc8 11. Rfd1 Qc7 12. d3 Qb8 {A14: English Opening: 1...e6 with b3 by White} 13. Ne1 {[#]} Rfd8 $146 ({Predecessor:} 13... a6 14. Rac1 Rfd8 15. Ba3 Bf8 16. cxd5 exd5 17. d4 cxd4 18. Bxf8 Nxf8 19. exd4 Ne6 20. Qb2 {½-½ (34) Shcherbakov,R (2559)-Yevseev,D (2503) Novgorod 1999}) 14. f4 a6 {The position is equal.} 15. Rab1 d4 16. exd4 cxd4 17. Ne4 Nxe4 18. Bxe4 Bxe4 19. Qxe4 Nf6 20. Qe2 b5 21. Nf3 Bc5 22. Ne5 bxc4 23. bxc4 Qc7 24. Bc1 Ne8 25. Rd2 Nd6 26. Rdb2 Re8 27. Qf3 f6 28. Ng4 Qf7 29. Bd2 e5 30. fxe5 fxe5 31. Qxf7+ Kxf7 32. Bb4 e4 33. Bxc5 Rxc5 34. Rb6 Re6 35. dxe4 h5 (35... Nxe4 $11 36. Rf1+ Nf6) 36. Nf2 (36. Rf1+ $14 Ke7 37. Nf2) 36... Nxc4 $11 37. Rb7+ Kg8 38. Rd7 Ne5 $36 {[%mdl 2048] White is under pressure.} 39. Rd8+ Kh7 40. Nh3 {Black must now prevent Ng5+.} Rec6 (40... Rf6 $5 {[%cal Re5f3]} 41. Nf4 h4 $1 $11 {[%mdl 512]}) 41. Rd5 (41. Rf1 $11) 41... Rxd5 $17 42. exd5 {[%mdl 4096] Endgame KRN-KRN} Rc2 {Threatens to win with ...Nf3+.} 43. d6 (43. Rd1 $15) 43... d3 (43... Rxa2 $6 44. Rb7 $11) (43... Nf3+ $6 44. Kf1 $11) (43... Rc6 $1 $17 44. d7 Nxd7 45. Ng5+ Kg6) 44. Nf2 Rc4 (44... Rxa2 $6 45. Nxd3 $1 {[%mdl 512]} Nf3+ 46. Kf1 $11) (44... d2 $17 {Strongly threatening ...Rc1+.} 45. Rd1 Rc4) 45. Kg2 (45. Kf1 $1 $11 {remains equal.}) 45... Rd4 46. Re1 Nd7 (46... Rd5 $17 47. d7 Nxd7) 47. Rd1 ({White should play} 47. Re6 $15) 47... d2 ({Much worse is} 47... Rxd6 $6 48. Rxd3 Rxd3 49. Nxd3 $11) 48. Nh3 $2 {[%mdl 8192] [#]} (48. Kf3 $17) 48... Ne5 $1 $19 49. Kf2 Nc4 ({Less strong is} 49... Rxd6 50. Ke2 $17) 50. Ke2 Kg6 $2 ({Worse is} 50... Nxd6 51. Rxd2 Rxd2+ 52. Kxd2 $11) (50... Rxd6 $19 51. Ng5+ Kg6) 51. Nf4+ $2 {[%mdl 8192]} (51. Nf2 $17) 51... Kf5 52. Nxh5 Rxd6 53. Nf4 Ke4 54. Nh3 Kd4 55. Ng5 Rd5 56. h4 $2 (56. Nf3+ Kc3 57. h3) 56... Kc3 (56... Re5+ $142 57. Kf2 Kd3) 57. Nf3 Kc2 58. g4 Rd6 {...Re6+ is the strong threat.} 59. Nxd2 Nxd2 {Accuracy: White = 34%, Black = 56%.} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.12"]
[Round "2.1"]
[White "Vaidya, Atulya"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "E12"]
[WhiteElo "2118"]
[BlackElo "2592"]
[Annotator "TA"]
[PlyCount "122"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,122,5,0,42,20,42,37,61,55,87,68,92,0,0,0,0,0,0,0,0,-22,-27,-23,-24,-25,-16,-23,-23,-9,-16,-13,-23,-39,0,0,0,0,0,0,0,0,0,-4,0,-8,-4,-4,-8,-6,-8,-8,-8,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-19,-8,-16,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,-5,0,-22,-33,-108,-16,-303,-293,-652,-650,-664,-689,-621,-621,-619,-619,-964,-907]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2 Be7 8. e4 Nxc3 9. bxc3 O-O 10. Bd3 Nd7 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7} (10... c5 11. O-O Qc8 12. Qe2 Ba6 13. Rd1 Bxd3 14. Rxd3 Nd7 15. e5 Re8 16. h4 cxd4 17. cxd4 Qb7 18. Bg5 Bf8 19. Nd2 f6 20. exf6 Nxf6 21. Bxf6 gxf6 {1-0 (34) Gupta,A (2610)-Ivanchuk,V (2725) Caleta 2018}) 11. O-O h6 12. Qe2 $146 ({Predecessor:} 12. Rd1 Kh8 13. Qe2 Nf6 14. Bc2 Qe8 15. Bf4 Nh5 16. Be3 f5 17. e5 {½-½ (72) Hoeglauer,P (2153)-Froehlich Dill,A (1813) Wiesbaden 2016}) 12... Re8 {White is slightly better.} 13. Bf4 Bd6 14. e5 Bf8 15. Be4 (15. Nd2 $16) 15... Bxe4 $11 16. Qxe4 c5 17. Rfd1 cxd4 18. cxd4 Rc8 19. Rac1 b5 20. d5 exd5 21. Qxd5 Nc5 22. Be3 $1 {[%cal Re3c5]} Qxd5 23. Rxd5 {[%cal Re3c5]} Red8 24. Rxd8 ({Don't go for} 24. Rdxc5 $2 Bxc5 25. Bxc5 Rxc5 $1 $19 {[%mdl 512]}) 24... Rxd8 25. Kf1 Na4 26. Nd4 Bxa3 27. Rc7 Bb2 28. Nc6 Rd1+ 29. Ke2 Nc3+ 30. Kf3 a6 31. e6 fxe6 {Black wants to play ...Nd5.} 32. Bd4 $1 Rd3+ 33. Kg4 Nd1 34. Rxg7+ $1 Kf8 35. Bxb2 Nxb2 {[%mdl 4096] Endgame KRN-KRN} 36. Ra7 Rd2 37. Kh5 Rd6 38. Rxa6 Kg7 39. f4 Nd3 40. g3 $1 Rd5+ 41. Kh4 Kf6 42. Ra7 Rd6 43. Ne7 e5 44. Kg4 {aiming for Ng8+.} h5+ 45. Kf3 exf4 46. gxf4 b4 47. Rb7 Ke6 48. Ng6 Kf5 49. Ne7+ Kf6 50. Ke3 Ne1 {White must now prevent ...Re6+.} 51. Ng8+ Kf5 {And now ...Nc2+ would win.} 52. Ne7+ Kg4 {Strongly threatening ...Ng2+.} 53. Ke4 Nd3 {...Nc5+ is the strong threat.} 54. Rb8 Nc5+ 55. Ke5 {[#]} Rd2 (55... Re6+ $1 $17 56. Kd5 Rxe7 57. Kxc5 Re2 58. h3+ Kxh3) 56. Rg8+ $2 {[%mdl 8192]} (56. Rb5 $11 {and White is okay.}) 56... Kh3 $19 57. Rc8 $2 (57. Nf5 b3 58. Ne3) 57... Nd3+ {Black is clearly winning.} 58. Ke4 b3 {[%cal Bb4b3,Bb3b2][%mdl 32]} 59. Rb8 b2 60. f5 Rd1 61. f6 {If only White now had time for f7....} Nc5+ {Accuracy: White = 56%, Black = 62%.} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.12"]
[Round "2.2"]
[White "Sheng, Joshua"]
[Black "Hilby, Craig"]
[Result "1/2-1/2"]
[ECO "D71"]
[WhiteElo "2449"]
[BlackElo "2433"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,101,24,17,0,0,0,31,33,18,0,0,0,0,0,0,-2,37,13,123,53,104,73,66,0,0,0,0,0,89,75,69,89,104,91,85,74,75,71,84,88,195,191,222,181,241,244,318,309,466,495,534,542,799,790,981,651,641,630,549,249,225,132,133,123,117,35,113,8,8,8,10,8,8,8,59,60,59,59,59,59,66,62,562,496,1000,59]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. Nf3 Nb6 7. Nc3 Nc6 8. e3 O-O 9. O-O Re8 10. Nh4 {D76: Fianchetto Grünfeld: Main Line with 7...Nb6} (10. a3 e5 11. d5 Na5 12. Qc2 c6 13. b4 Nac4 14. dxc6 bxc6 15. Rd1 Bf5 16. e4 Bd7 17. Na4 Nxa4 18. Qxc4 {½-½ (50) Le,Q (2737)-Ivanchuk,V (2726) Huaian 2017}) 10... e5 {[%cal Re5d4]} 11. d5 Na5 12. Rb1 {White is slightly better.} Bd7 13. e4 c6 14. b3 cxd5 15. exd5 f5 $146 ({Predecessor:} 15... g5 16. Nf3 Bf5 17. Bxg5 f6 {1-0 (34) Bogner,S (2599)-Kiewra,K (2433) Douglas 2017}) 16. Nf3 Qf6 (16... e4 $5 17. Nd4 $8 Rc8 $11) 17. Bb2 Nc8 (17... Qd6 $11 {keeps the balance.}) 18. Qd2 (18. d6 $1 $16 Re6 19. Qd5) 18... b6 (18... Nd6 $14) 19. Nd1 $36 {[%mdl 2048] Keeping Black busy.} Qf8 20. Re1 ({Better is} 20. d6 $14 Qxd6 21. Qxd6 Nxd6 22. Nxe5 $1 {[%mdl 512]}) 20... e4 $11 21. Bxg7 Qxg7 22. Nd4 Qe5 (22... Nd6 $11) 23. f3 $16 Nd6 24. Nc3 e3 25. Qd3 g5 26. f4 gxf4 27. Nf3 $1 {[%cal Rf3e5]} Qg7 28. gxf4 Re4 (28... Nab7 $16) 29. Rxe3 $18 Rxf4 30. Ne5 $1 Kh8 (30... Rf8 $142 31. Rg3 Rg4) 31. Rbe1 Ne4 32. Nxe4 fxe4 (32... Rxe4 {was called for.} 33. Rxe4 fxe4) 33. Qc3 ({Less strong is} 33. Rxe4 Rg8 $16) 33... Rc8 34. Qa1 $1 Be8 {If only Black now had time for ...Rf5....} 35. Rg3 Qf6 36. Rf1 Rxf1+ 37. Bxf1 {Nf7+! would kill now.} Rc7 {[#]} 38. Qd4 ({Weaker is} 38. Ng6+ Kg7 $14) (38. Bb5 $142 $1 {[%mdl 512] Black must now prevent Ng6+!} Rg7 (38... Bxb5 39. Ng6+) 39. Bxe8) 38... Rg7 {[#]} 39. Qxe4 (39. Ba6 $1 $18) 39... Nb7 $16 40. Ng4 Qe7 41. Qe6 (41. Qxe7 $16 {Threatening mate with Nh6!} Rxe7 42. Nf6) 41... Nd6 (41... Qxe6 $14 42. dxe6 Nd6) 42. Bh3 ({White should play} 42. Qxe7 $16 {White threatens Nh6! and mate.} Rxe7 43. Nf6) 42... Qxe6 $11 43. dxe6 {Hoping for Rd3.} Ne4 44. Rf3 Rg8 {Threatens to win with ...Ng5.} 45. Bg2 Rxg4 (45... Bh5 $1 $11 46. h3 Ng5) 46. Rf8+ $14 {[%mdl 64] Double Attack} Rg8 47. Rxg8+ Kxg8 48. Bxe4 Kg7 49. Kf2 Bg6 $2 {[%mdl 8192]} (49... h6 $1 $14) 50. Ke3 $18 Kf6 (50... Bh5 $142 51. Kf4 Kf6 52. Bxh7 Kxe6) 51. Bd5 $2 {Accuracy: White = 60%, Black = 40%.} (51. Bxg6 $18 hxg6 52. Kf4 Kxe6 53. Ke4) 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.12"]
[Round "2.3"]
[White "Burke, John M"]
[Black "Tang, Andrew"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "2562"]
[BlackElo "2495"]
[Annotator "ChessBase"]
[PlyCount "59"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 {[%emt 0:00:00]} e5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:00]} 3. Bb5 {[%emt 0:00:00]} g6 {[%emt 0:00:00]} 4. d4 {[%emt 0:01:42]} exd4 {[%emt 0:00:00]} 5. Bg5 {[%emt 0:01:07]} Be7 {[%emt 0:00:03]} 6. Bxe7 {[%emt 0:00:30]} Qxe7 {[%emt 0:00:06]} 7. Bxc6 {[%emt 0:01:19]} dxc6 {[%emt 0:00:04]} 8. Qxd4 {[%emt 0:00:14]} Nf6 {[%emt 0:00:07]} 9. Nc3 {[%emt 0:01:14]} Bg4 {[%emt 0:00:08]} 10. Nd2 {[%emt 0:02:39]} c5 {[%emt 0:00:05]} 11. Qe3 {[%emt 0:02:19]} O-O-O {[%emt 0:00:07]} 12. f3 {[%emt 0:01:34]} Be6 {[%emt 0:00:26]} 13. O-O-O {[%emt 0:09:21]} b6 {[%emt 0:00:10]} 14. g4 {[%emt 0:02:12]} Kb8 {[%emt 0:04:43]} 15. Nb3 {[%emt 0:11:24]} Bc8 {[%emt 0:11:37]} 16. h4 {[%emt 0:06:24]} Rxd1+ {[%emt 0:34:19]} 17. Rxd1 {[%emt 0:02:39]} h6 {[%emt 0:01:35]} 18. Qf4 {[%emt 0:07:31]} Be6 {[%emt 0:02:05]} 19. Nd2 {[%emt 0:05:08]} Ne8 {[%emt 0:08:43]} 20. Qg3 {[%emt 0:12:34]} Nd6 {[%emt 0:01:30]} 21. Nf1 {[%emt 0:02:06]} Nc4 {[%emt 0:08:28]} 22. b3 {[%emt 0:04:00]} Qf6 {[%emt 0:05:11]} 23. f4 {[%emt 0:00:44]} Bxg4 {[%emt 0:00:40]} 24. Qxg4 {[%emt 0:09:03]} Qxc3 {[%emt 0:00:07]} 25. bxc4 {[%emt 0:00:04]} Qa1+ {[%emt 0:02:39]} 26. Kd2 {[%emt 0:00:05]} Qd4+ {[%emt 0:00:12]} 27. Kc1 {[%emt 0:00:33]} Qa1+ {[%emt 0:00:06]} 28. Kd2 {[%emt 0:00:02]} Qd4+ {[%emt 0:00:20]} 29. Kc1 {[%emt 0:00:05]} Qa1+ {[%emt 0:14:35]} 30. Kd2 {[%emt 0:00:11]} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.12"]
[Round "2.4"]
[White "Niemann, Hans Moke"]
[Black "Yu, Jennifer"]
[Result "1-0"]
[ECO "A06"]
[WhiteElo "2467"]
[BlackElo "2341"]
[PlyCount "59"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[TimeControl "40/5400+30:1800+30"]

1. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} e6 {[%emt 0:00:09]} 3. b3 {[%emt 0:01:10]} Nf6 {[%emt 0:01:59]} 4. Bb2 {[%emt 0:00:06]} Bd6 {[%emt 0:03:39]} 5. g4 {[%emt 0:04:39]} Nxg4 {[%emt 0:11:31]} 6. Rg1 {[%emt 0:03:43]} e5 {[%emt 0:04:02]} 7. h3 {[%emt 0:00:59]} e4 {[%emt 0:00:19]} 8. hxg4 {[%emt 0:00:18]} exf3 {[%emt 0:00:05]} 9. e3 {[%emt 0:00:12]} Qg5 {[%emt 0:20:12]} 10. Qxf3 {[%emt 0:10:55]} h5 {[%emt 0:12:40]} 11. Nc3 {[%emt 0:04:13]} hxg4 {[%emt 0:03:06]} 12. Qxd5 {[%emt 0:03:36]} Qxd5 {[%emt 0:04:07]} 13. Nxd5 {[%emt 0:00:31]} Kf8 {[%emt 0:00:22]} 14. e4 {[%emt 0:10:59]} Na6 {[%emt 0:15:58]} 15. Be2 {[%emt 0:05:21]} f6 {[%emt 0:01:57]} 16. d4 {[%emt 0:01:40]} Bh2 {[%emt 0:04:22]} 17. Rg2 {[%emt 0:01:35]} Rh4 {[%emt 0:00:14]} 18. Kd2 {[%emt 0:04:18]} Bd7 {[%emt 0:02:59]} 19. Kc2 {[%emt 0:05:11]} Re8 {[%emt 0:05:11]} 20. Rh1 {[%emt 0:05:44]} g3 {[%emt 0:02:20]} 21. fxg3 {[%emt 0:01:10]} Bxg3 {[%emt 0:00:03]} 22. Ba3+ {[%emt 0:00:07]} c5 {[%emt 0:00:26]} 23. Rxh4 {[%emt 0:00:03]} Bxh4 {[%emt 0:00:04]} 24. dxc5 {[%emt 0:00:05]} Kg8 {[%emt 0:02:27]} 25. Bd3 {[%emt 0:00:38]} Nb8 {[%emt 0:00:30]} 26. Bb2 {[%emt 0:00:15]} Kf7 {[%emt 0:00:14]} 27. e5 {[%emt 0:00:15]} Bg5 {[%emt 0:02:58]} 28. exf6 {[%emt 0:00:33]} gxf6 {[%emt 0:00:03]} 29. Bxf6 {[%emt 0:00:17]} Bxf6 {[%emt 0:00:23]} 30. Bg6+ 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.12"]
[Round "2.5"]
[White "Checa, Nicolas"]
[Black "Jacobson, Brandon"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2506"]
[BlackElo "2456"]
[Annotator "ChessBase"]
[PlyCount "128"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 3. c4 {[%emt 0:00:32]} e6 {[%emt 0:00:00]} 4. Nc3 {[%emt 0:00:05]} a6 {[%emt 0:00:00]} 5. cxd5 {[%emt 0:02:55]} exd5 {[%emt 0:00:00]} 6. Bg5 {[%emt 0:00:10]} Be6 {[%emt 0:00:00]} 7. e3 {[%emt 0:00:16]} Nbd7 {[%emt 0:00:02]} 8. h3 {[%emt 0:06:36]} Bd6 {[%emt 0:02:17]} 9. Bd3 {[%emt 0:00:24]} c6 {[%emt 0:00:24]} 10. O-O {[%emt 0:00:13]} Qc7 {[%emt 0:00:51]} 11. Qd2 {[%emt 0:03:13]} O-O {[%emt 0:00:07]} 12. Rac1 {[%emt 0:02:12]} Rfe8 {[%emt 0:04:00]} 13. Rfe1 {[%emt 0:08:05]} g6 {[%emt 0:18:14]} 14. Bf4 {[%emt 0:04:31]} Rad8 {[%emt 0:00:51]} 15. b3 {[%emt 0:05:40]} Qb8 {[%emt 0:11:03]} 16. Rb1 {[%emt 0:07:09]} Qc7 {[%emt 0:17:33]} 17. a4 {[%emt 0:05:10]} Nb6 {[%emt 0:03:35]} 18. Ne2 {[%emt 0:04:12]} Ne4 {[%emt 0:14:50]} 19. Qa5 {[%emt 0:05:33]} Na8 {[%emt 0:01:52]} 20. Qxc7 {[%emt 0:00:56]} Nxc7 {[%emt 0:00:03]} 21. Rec1 {[%emt 0:03:43]} Bf5 {[%emt 0:03:33]} 22. Bxd6 {[%emt 0:09:52]} Nxd6 {[%emt 0:00:09]} 23. Bxf5 {[%emt 0:00:04]} Nxf5 {[%emt 0:00:05]} 24. g4 {[%emt 0:00:04]} Nd6 {[%emt 0:00:10]} 25. Kg2 {[%emt 0:00:10]} Kg7 {[%emt 0:00:58]} 26. Nf4 {[%emt 0:00:23]} Re7 {[%emt 0:01:39]} 27. Ne5 {[%emt 0:02:09]} Ne6 {[%emt 0:01:59]} 28. Nfd3 {[%emt 0:03:40]} f6 {[%emt 0:00:48]} 29. Nf3 {[%emt 0:00:04]} Rh8 {[%emt 0:00:22]} 30. Nc5 {[%emt 0:01:34]} h5 {[%emt 0:00:48]} 31. Nxe6+ {[%emt 0:02:55]} Rxe6 {[%emt 0:00:13]} 32. Rh1 {[%emt 0:01:28]} Ne4 {[%emt 0:03:48]} 33. Rbc1 {[%emt 0:03:23]} a5 {[%emt 0:01:46]} 34. Rc2 {[%emt 0:01:25]} Ree8 {[%emt 0:01:09]} 35. Rb1 {[%emt 0:02:12]} hxg4 {[%emt 0:05:07]} 36. hxg4 {[%emt 0:00:35]} Nd6 {[%emt 0:00:04]} 37. Rh1 {[%emt 0:03:18]} Rxh1 {[%emt 0:03:59]} 38. Kxh1 {[%emt 0:00:03]} Re4 {[%emt 0:00:07]} 39. Nh2 {[%emt 0:00:06]} f5 {[%emt 0:01:27]} 40. gxf5 {[%emt 0:00:00]} gxf5 {[%emt 0:00:00]} 41. Kg2 {[%emt 0:14:38]} f4 {[%emt 0:00:21]} 42. Nf1 {[%emt 0:00:08]} Nf5 {[%emt 0:00:32]} 43. Rc3 {[%emt 0:00:59]} Kf6 {[%emt 0:04:02]} 44. Nd2 {[%emt 0:02:02]} Re8 {[%emt 0:00:16]} 45. Kf3 {[%emt 0:00:24]} fxe3 {[%emt 0:00:11]} 46. fxe3 {[%emt 0:00:07]} Rh8 {[%emt 0:00:25]} 47. Nf1 {[%emt 0:01:52]} Nd6 {[%emt 0:06:45]} 48. Rc5 {[%emt 0:01:38]} Ra8 {[%emt 0:06:34]} 49. Ng3 {[%emt 0:00:54]} Ke7 {[%emt 0:03:56]} 50. Rc1 {[%emt 0:04:11]} Rf8+ {[%emt 0:00:39]} 51. Kg2 {[%emt 0:00:10]} Kd7 {[%emt 0:01:07]} 52. Rh1 {[%emt 0:01:21]} Rf7 {[%emt 0:00:26]} 53. Rh8 {[%emt 0:01:08]} Kc7 {[%emt 0:00:02]} 54. Rh1 {[%emt 0:01:16]} b5 {[%emt 0:01:12]} 55. axb5 {[%emt 0:03:41]} cxb5 {[%emt 0:00:19]} 56. Rh8 {[%emt 0:04:36]} Kb7 {[%emt 0:07:34]} 57. Rd8 {[%emt 0:03:38]} Ne4 {[%emt 0:06:19]} 58. Nxe4 {[%emt 0:03:40]} dxe4 {[%emt 0:00:02]} 59. Rd5 {[%emt 0:00:53]} Kb6 {[%emt 0:02:41]} 60. Rd6+ {[%emt 0:00:08]} Ka7 {[%emt 0:01:18]} 61. Rd5 {[%emt 0:00:29]} Kb6 {[%emt 0:00:52]} 62. Rd6+ {[%emt 0:00:27]} Kb7 {[%emt 0:00:12]} 63. Rd5 {[%emt 0:01:08]} Kc6 {[%emt 0:00:41]} 64. Re5 {[%emt 0:00:37]} a4 {[%emt 0:01:05]} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.13"]
[Round "3.1"]
[White "Jacobson, Brandon"]
[Black "Vaidya, Atulya"]
[Result "1/2-1/2"]
[ECO "B05"]
[WhiteElo "2456"]
[BlackElo "2118"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,61,40,63,81,68,71,157,157,166,154,148,161,175,172,158,155,176,177,178,160,167,171,189,160,187,191,229,220,244,176,256,254,263,250,252,236,268,227,205,222,222,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 dxe5 6. Nxe5 {B05: Alekhine's Defence: 4 Nf3 Bg4} Bxe2 7. Qxe2 c6 ({Black should play} 7... Nd7) 8. Qf3 $1 $16 {[%csl Ge5][%cal Rf3f7] White is clearly better.} (8. O-O e6 9. c4 Nf6 10. Rd1 Be7 11. Nc3 O-O 12. Bf4 Nbd7 13. a3 Re8 {1-0 (42) Ponizil,C (2464)-Biolek,R (2445) Czech Republic 2016}) 8... Nf6 {[#]} 9. Qb3 $1 {[%csl Ge5][%cal Rb3f7]} e6 10. Qxb7 $40 {[%csl Ge5][%cal Rb7f7][%mdl 192] Double Attack. White attacks with force.} Nbd7 $146 ({Predecessor:} 10... Qxd4 11. Qxf7+ Kd8 12. Qxe6 Bb4+ 13. Kf1 Qd1# {0-1 (13) Grishin,M-Gush,M Serpukhov 2001}) 11. Nxd7 ({Resist} 11. Nxc6 Qc8 $16) 11... Nxd7 12. Qxc6 Rc8 13. Qf3 Bd6 14. c3 O-O {[#]} 15. O-O $1 Qb6 16. Nd2 Rfe8 17. Ne4 Bf8 18. b3 Qc6 19. Bb2 h6 (19... e5 $142 20. Rac1 Qe6) 20. c4 $18 a5 21. Rad1 a4 22. Rd3 Qa6 23. d5 exd5 24. Rxd5 Qe6 25. Rxd7 $2 (25. Ng3 $18) 25... Qxd7 $11 {The position is equal.} 26. Nf6+ gxf6 27. Qxf6 {[%csl Gb2][%cal Rf6h8]} Kh7 {...Rc6 is the strong threat.} 28. Qh8+ Kg6 {White must now prevent ...Rc6.} 29. Qf6+ Kh7 $1 {Strongly threatening ...Rc6.} 30. Qh8+ Kg6 {Threatens to win with ...Rc6.} 31. Qf6+ {Accuracy: White = 89%, Black = 45%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.13"]
[Round "3.2"]
[White "Yu, Jennifer"]
[Black "Checa, Nicolas"]
[Result "0-1"]
[ECO "D10"]
[WhiteElo "2341"]
[BlackElo "2506"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,110,16,28,19,21,23,21,26,22,0,0,0,62,40,30,17,24,-12,61,0,7,-21,-14,-20,-1,-24,4,0,8,-80,-89,-89,-89,-75,-82,-85,-92,-89,-89,-74,-68,-70,-81,-87,-85,-116,-116,-129,-121,-133,-62,-59,-51,-58,-11,-5,0,0,0,0,4,0,0,-7,0,-33,-17,-58,-53,-53,-53,-81,-69,-86,-86,-76,-72,-72,-61,-71,-60,-54,-54,-53,-54,-135,-118,-398,-397,-400,-392,-372,-365,-341,-333,-510,-510,-506,-506,-500,-459,-538,-524]} 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nc6 5. e3 Bf5 (5... Nf6 6. Bd3 Bg4 7. Ne2 e6 8. Nbc3 a6 9. Qb3 Na5 10. Qa4+ Nc6 11. Ng3 Bh5 12. Nxh5 Nxh5 13. Be5 Bd6 14. O-O O-O 15. Bxd6 Qxd6 16. Rfc1 Nf6 {½-½ (47) Korobov,A (2756)-Bu,X (2722) Hengshui 2019}) 6. Nc3 {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3} e6 7. Qb3 Qd7 8. Nf3 {The position is equal.} f6 9. Rc1 g5 10. Bg3 Bg6 $146 (10... h5 $11 11. h4 g4) ({Predecessor:} 10... Kf7 11. Bb5 Rc8 12. O-O Bd6 13. e4 dxe4 14. d5 exf3 15. dxc6 bxc6 16. Rcd1 Qb7 17. Rxd6 cxb5 18. Re1 Kg6 19. h4 gxh4 {½-½ (19) Esen,B (2565)-Solak,D (2628) Adana 2015}) 11. Bb5 Nge7 12. Na4 {Threatens to win with Nc5.} Nf5 13. Be5 Kf7 {[#]} ({Of course not} 13... fxe5 $6 14. Nxe5 Qc7 15. Rxc6 $16 (15. Bxc6+ bxc6 16. Rxc6 Qa5+ 17. Nc3 Nd6 $14)) (13... Be7 $1 $11 14. h3 Rc8) 14. Nxg5+ $1 {[%mdl 512]} Kg7 $11 (14... fxg5 15. Bxh8) 15. Nf3 fxe5 16. Bxc6 bxc6 17. Nxe5 Qc7 {White must now prevent ...Rb8.} 18. Rxc6 Qa5+ 19. Ke2 (19. Nc3 $11 {keeps the balance.} Bb4 20. O-O) 19... Be7 $17 20. Nc5 Bxc5 $1 21. Rxc5 Qa6+ 22. Qb5 Qxb5+ 23. Rxb5 Rab8 $36 {[%mdl 2048] Black has strong initiative.} 24. Rxb8 Rxb8 25. b3 Rc8 $1 {[%cal Rc8c2] And now ...Rc2+ would win.} 26. Nxg6 hxg6 {[%mdl 4096] Endgame KRN-KR} 27. Kd2 Nh4 28. Rg1 Kf6 29. f3 e5 (29... g5 $17 30. Kd3 Nf5) 30. dxe5+ $1 $15 Kxe5 31. Kd3 Nf5 32. g4 Nd6 (32... Nh4 {seems wilder.} 33. f4+ Kf6 34. Rf1 Rc7 35. h3 Rc6) 33. h4 Rh8 34. Rh1 Ne8 35. a4 a5 36. Rc1 Rxh4 37. Rc5 Rh3 38. f4+ Kd6 $1 {[%cal Rd6c5]} 39. Rxa5 {Threatening Ra6+.} Nc7 40. g5 Rh1 41. Kc2 Re1 42. Kd2 Ra1 43. Kd3 Kc6 44. e4 Rd1+ 45. Kc2 Rd4 46. exd5+ $1 Kd6 47. Kc3 (47. Ra7 $15) 47... Rxf4 $17 48. b4 $2 {[%mdl 8192]} (48. Kb2 $17) 48... Nxd5+ $19 {[%mdl 64] Double Attack} 49. Kd2 Rxb4 50. Ra6+ Rb6 51. Ra8 Ke5 52. a5 (52. Kd3 $142) 52... Rb2+ {Black is clearly winning.} 53. Kd3 Ra2 54. Re8+ Kf5 55. Kd4 {Re5+ is the strong threat.} Rxa5 {Accuracy: White = 42%, Black = 70%.} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.13"]
[Round "3.3"]
[White "Tang, Andrew"]
[Black "Niemann, Hans Moke"]
[Result "1/2-1/2"]
[ECO "D12"]
[WhiteElo "2495"]
[BlackElo "2467"]
[PlyCount "80"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]

{[%evp 10,80,38,18,35,21,29,14,9,16,7,7,14,14,22,14,20,14,12,23,20,25,22,29,14,17,41,30,66,15,15,15,20,-9,-10,-24,0,0,0,0,22,25,24,17,47,43,43,22,25,11,12,27,60,70,66,64,50,45,47,81,64,8,8,8,8,8,8,8,8,8,29,8,8]} 1. d4 Nf6 ({Predecessor:} 1... d5 2. c4 c6 3. Nf3 {1-0 (46) Tikkanen,H (2503)-Grandelius,N (2642) Stockholm 2017}) 2. c4 c6 3. Nf3 d5 4. e3 Bf5 5. Nc3 a6 6. Qb3 b5 $146 {D15: Slav Defence: 4 Nc3 a6 and gambit lines after 4 Nc3 dxc4} (6... Ra7 7. Nh4 Bc8 8. Bd2 e6 9. c5 Nbd7 10. Nf3 e5 11. Nxe5 Nxe5 12. dxe5 Nd7 13. Na4 Bxc5 14. Nxc5 Nxc5 {0-1 (84) Radjabov,T (2757)-Fedoseev,V (2724) Wijk aan Zee 2019}) 7. cxd5 cxd5 8. a4 b4 $1 {[%cal Rb4c3]} 9. Qxb4 Nc6 10. Qc5 Bd7 11. Ne5 e6 12. Nxc6 Qc7 13. Ne7 Qxc5 14. dxc5 {[#] Threatens to win with c6.} Bxe7 15. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} a5 16. b5 Bxc5 17. Bd3 Ke7 18. Bb2 Rhc8 19. Ke2 ({White should try} 19. O-O $14) 19... e5 $11 20. Rhc1 Be6 21. f3 Nd7 22. Nb1 (22. Bxh7 g6 $17) 22... Bd6 23. Nd2 Nc5 24. Ba3 ({But not} 24. Bxh7 g6 $17) 24... Nb7 25. Bxd6+ ({Much weaker is} 25. Bxh7 Bxa3 26. Rxc8 Rxc8 $17) 25... Kxd6 26. e4 ({Of course not} 26. Bxh7 g6 $15) 26... d4 27. Bc4 f6 28. Bxe6 Kxe6 29. Nc4 Rc5 $1 {[#] aiming for ...Rac8.} 30. Nb6 Rb8 31. Rxc5 Nxc5 $14 {[%mdl 4096] Endgame KRN-KRN} 32. Rc1 $1 Nxe4 $1 {Strongly threatening ...Nc3+.} 33. Rc6+ Nd6 34. Nc4 Rd8 35. Nxa5 (35. Ra6 $14 Kd5 36. Nxd6 Rxd6 37. Rxa5) 35... Kd5 $11 36. Nb3 {Hoping for Rc5+.} Rc8 $1 {[%cal Rc8c6]} 37. Rxc8 Nxc8 38. a5 Nd6 39. b6 Kc6 40. f4 Kb5 {Accuracy: White = 66%, Black = 71%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.13"]
[Round "3.4"]
[White "Hilby, Craig"]
[Black "Burke, John M"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2433"]
[BlackElo "2562"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,89,9,29,8,27,15,8,20,8,4,-20,-3,-13,-5,-28,0,-34,-6,-52,-40,-51,-23,-32,0,-12,-5,-60,29,-53,-50,-106,-76,-174,0,0,0,0,0,-14,103,104,346,354,309,185,581,568,624,306,303,315,298,184,191,62,60,55,164,163,175,170,170,161,163,162,175,135,154,85,114,75,85,84,97,106,99,8,8,8,14,7]} 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. e3 Nc6 {A22: English Opening: 1...e5 2 Nc3 Nf6} 7. Nge2 h5 (7... Qd3 8. f4 Bb4 9. fxe5 Nxe5 10. Nf4 Qa6 11. Qc2 O-O 12. d4 Ng4 13. Nd3 Bxc3+ 14. Qxc3 {½-½ (36) Aronian,L (2762)-Nepomniachtchi,I (2773) Moscow 2019}) 8. d4 h4 9. d5 Ne7 10. e4 c6 11. a4 cxd5 {...d4 is the strong threat.} 12. a5 {[%cal Re4d5]} Nc4 13. exd5 Nd6 14. b3 $146 (14. Ne4 $5 {[%cal Rd1a4]} Nef5 15. f4 $11) ({Predecessor:} 14. Ne4 Nef5 15. O-O hxg3 16. hxg3 Nxe4 17. Bxe4 {½-½ (17) Klekowski,M (2471)-Nevednichy,V (2524) Konya 2017}) 14... Ng6 15. O-O Be7 16. Ba3 f5 17. Re1 O-O 18. Na4 (18. Bc5 $11) 18... f4 (18... Qxa5 $15 19. Nc5 Rd8) 19. gxf4 (19. Nec3 $1 $11) 19... h3 $15 20. Bh1 (20. Bf3 $15) 20... Bg4 $17 21. f3 (21. Qd2 $17) 21... Bh5 $2 (21... Bd7 $19 22. fxe5 Bh4) 22. Nc5 $1 $36 {[%cal Rc5e6][%mdl 2048] aiming for Ne6. White is pushing.} Nf5 {And now ...Bxc5+ would win.} 23. Ne6 (23. Nxb7 $2 Bxa3 $1 {[%mdl 512]} 24. Nxd8 Bc5+ 25. Nd4 Raxd8 $19) 23... Bxa3 $1 24. Rxa3 Qh4 (24... Qd6 $11 25. Ra4 Nxf4 26. N2xf4 exf4) 25. Ra4 $16 {Threatens to win with fxe5.} ({But not} 25. Nxf8 Rxf8 26. Ra4 exf4 $15) 25... Ne3 $2 {[#]} (25... e4 $16 {was worth a try.} 26. Rxe4 Rf7) 26. Qd2 $1 $18 exf4 27. Ng3 (27. N2xf4 $142 Rxf4 28. Nxf4 (28. Qxe3 Rxa4 29. bxa4 Re8 $16) 28... Qg5+ 29. Kf2) 27... Rf6 $2 (27... Nf5) 28. Rxe3 fxe3 29. Qxe3 (29. Qc3 $142 Bxf3 30. Rxh4 Nxh4 31. Qxe3 Bxh1 32. Kxh1) 29... Nf4 30. Nxf4 ({Resist} 30. Rxf4 Rxf4 31. Qxf4 Qxf4 $16) 30... Qg5 31. Re4 Bf7 32. Nfh5 ({White should try} 32. Nxh3 $18 Qxe3+ 33. Rxe3) 32... Qxe3+ $14 33. Rxe3 Bxh5 (33... Ra6 $1 $14) 34. Nxh5 $18 Rf5 35. Ng3 Rxd5 36. f4 Rxa5 37. Bxb7 Rd8 38. Bf3 Rd2 39. Nf1 (39. Be2 $142) 39... Ra1 40. Be2 Kf8 41. Kf2 Rb2 42. Kf3 a5 43. Kg3 (43. Rc3 $16) 43... Rxe2 $11 {[%mdl 64] Remove Defender} 44. Rxe2 {Strongly threatening Nd2.} Rxf1 45. Ra2 {Accuracy: White = 30%, Black = 51%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.13"]
[Round "3.5"]
[White "Liang, Awonder"]
[Black "Sheng, Joshua"]
[Result "0-1"]
[ECO "C78"]
[WhiteElo "2592"]
[BlackElo "2449"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,112,36,21,22,29,16,8,26,0,0,-19,-20,-27,-15,-31,-23,-41,-36,-66,-16,-17,-16,-31,-40,-62,-62,-61,-33,-40,-31,-26,-43,-42,0,0,0,0,0,-26,16,0,0,0,0,0,0,0,0,0,16,0,0,0,0,0,9,0,0,0,0,0,0,0,0,-191,-190,-200,-190,-184,-193,-188,-195,-200,-176,-214,-220,-182,-190,-185,-176,-236,-236,-323,-323,-317,-317,-335,-321,-327,-316,-470,-505,-494,-489,-1618,-1692,-6390,-6357,-2710,-2477]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. d3 Be7 8. c4 O-O {C84: Closed Ruy Lopez: Unusual White 6th moves} 9. Nc3 bxc4 10. dxc4 $146 ({Predecessor:} 10. Bxc4 d6 11. a3 Nd4 12. b4 a5 13. b5 Qd7 14. a4 Rfd8 15. Nxd4 exd4 16. Nd5 Nxd5 17. Bxd5 {1-0 (55) Sasikiran,K (2639)-Mihajlov,S (2336) Skopje 2015}) 10... Bc5 {The position is equal.} 11. Ba4 d6 12. Bxc6 Bxc6 13. Qd3 Rb8 14. Rb1 a5 15. Bg5 h6 16. Bh4 Kh7 17. Nd5 Bxd5 $1 18. exd5+ e4 19. Qc2 g5 20. Bg3 Kg8 21. Nd2 Re8 22. Kh1 Qd7 23. h3 e3 24. fxe3 Nh5 25. Bh2 Bxe3 26. Rbe1 Bd4 (26... f5 $5) 27. Qd1 Rxe1 28. Rxe1 Nf6 29. Nb3 Bb6 30. Nd4 Re8 {[#] White must now prevent ...Rxe1+.} 31. Bg1 Ne4 32. Qd3 Qe7 33. Rf1 Qe5 $36 {[%mdl 2048] aiming for ...Ng3+. Black is more active.} 34. Nf5 {Threatens to win with Bxb6.} h5 35. Bxb6 cxb6 36. Kg1 Qxb2 37. Qf3 Qf6 38. Qxh5 {And now Nh6+ would win.} Kf8 39. Qg4 $2 {[#]} (39. Qd1 $11 {and White has nothing to worry.}) 39... Nd2 $1 $19 {[%cal Rd2f1]} 40. Rc1 Re4 41. Qd1 Nxc4 ({Much less strong is} 41... Qxf5 42. Qxd2 Qe5 43. Qc3 $15) 42. Ng3 Rd4 43. Qh5 Rh4 44. Qe2 Qf4 45. Qe1 Qd4+ 46. Kh2 Qxd5 47. Rd1 (47. Rc2 $142) 47... Qc5 48. Rd3 Ne5 49. Rc3 Rc4 50. Rxc4 Nxc4 ({Weaker is} 50... Qxc4 51. Qd2 $17) 51. Qc3 b5 52. Kh1 (52. Ne4 {was worth a try.} Qf5 53. Qh8+ Ke7 54. Qd4) 52... Qe5 {Black is clearly winning.} 53. Qf3 d5 54. Qg4 (54. Nf1 $142 b4 55. Qd1) 54... Ne3 55. Qc8+ Kg7 56. Nh5+ Kh6 {Accuracy: White = 44%, Black = 76%.} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.14"]
[Round "4.1"]
[White "Vaidya, Atulya"]
[Black "Sheng, Joshua"]
[Result "1/2-1/2"]
[ECO "E34"]
[WhiteElo "2118"]
[BlackElo "2449"]
[Annotator "ChessBase"]
[PlyCount "60"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. Nc3 {[%emt 0:00:00]} Bb4 {[%emt 0:00:00]} 4. Qc2 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 5. cxd5 {[%emt 0:00:00]} Qxd5 {[%emt 0:00:01]} 6. e3 {[%emt 0:02:32]} c5 {[%emt 0:01:55]} 7. Bd2 {[%emt 0:06:54]} Bxc3 {[%emt 0:01:37]} 8. Bxc3 {[%emt 0:00:31]} Nc6 {[%emt 0:06:46]} 9. dxc5 {[%emt 0:04:18]} Qxc5 {[%emt 0:00:06]} 10. Bd3 {[%emt 0:01:41]} O-O {[%emt 0:03:51]} 11. a3 {[%emt 0:03:09]} Qh5 {[%emt 0:02:40]} 12. Ne2 {[%emt 0:05:43]} Nd5 {[%emt 0:07:43]} 13. Nf4 {[%emt 0:01:02]} Nxf4 {[%emt 0:00:28]} 14. exf4 {[%emt 0:00:11]} Bd7 {[%emt 0:03:31]} 15. O-O {[%emt 0:02:48]} Ne7 {[%emt 0:05:31]} 16. Be4 {[%emt 0:02:54]} Bc6 {[%emt 0:06:39]} 17. Bb4 {[%emt 0:00:32]} Rfe8 {[%emt 0:01:13]} 18. Bxe7 {[%emt 0:00:14]} Bxe4 {[%emt 0:00:29]} 19. Qxe4 {[%emt 0:00:07]} Rxe7 {[%emt 0:00:01]} 20. Rfd1 {[%emt 0:00:16]} Rc7 {[%emt 0:09:16]} 21. Rd2 {[%emt 0:00:37]} Rac8 {[%emt 0:03:34]} 22. g3 {[%emt 0:00:38]} g6 {[%emt 0:01:57]} 23. Kg2 {[%emt 0:00:27]} Qb5 {[%emt 0:01:51]} 24. Rad1 {[%emt 0:01:32]} Rc4 {[%emt 0:05:13]} 25. Qe5 {[%emt 0:03:13]} Qxe5 {[%emt 0:02:29]} 26. fxe5 {[%emt 0:00:07]} R8c5 {[%emt 0:04:13]} 27. Rd8+ {[%emt 0:02:21]} Kg7 {[%emt 0:00:04]} 28. R8d7 {[%emt 0:00:06]} Rxe5 {[%emt 0:01:42]} 29. Rxb7 {[%emt 0:00:11]} Rc2 {[%emt 0:00:47]} 30. Rd3 {[%emt 0:00:06]} Rf5 {[%emt 0:03:52]} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.14"]
[Round "4.2"]
[White "Burke, John M"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "2562"]
[BlackElo "2592"]
[PlyCount "60"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]

{[%evp 14,60,24,17,27,27,43,25,43,36,43,48,48,31,37,27,26,0,56,0,0,-10,0,0,0,-39,-27,-41,-45,-176,-164,-189,-189,-271,-271,-271,-257,-259,-257,-266,-266,-417,-383,-4886,-2825,-5052,-5043,-2824,-1292]} 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bd6 7. Bd3 O-O 8. Qc2 (8. Be3 {feels hotter.} Re8 9. Qc2 h5 10. Ne2 Nd7 11. O-O) 8... h5 {B15: Caro-Kann: 3 Nc3: 3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6} 9. Ne2 Re8 10. O-O h4 {White has an edge.} 11. h3 Nd7 12. Be3 Nf8 13. Rad1 {[#]} Be6 $146 ({Predecessor:} 13... Ne6 14. c4 Ng5 15. Rfe1 Bc7 16. a3 {0-1 (52) Haldorsen,B (2448)-Artemiev,V (2736) Skopje 2019}) 14. c4 Rc8 15. Qa4 g5 (15... Ng6 $11) 16. d5 ({White should play} 16. Bc1 $14) 16... cxd5 $11 17. cxd5 Bd7 18. Qxa7 Qe7 {With the idea ...Qe5!} 19. Nd4 ({Don't play} 19. Qxb7 Rb8 $17) 19... f5 $1 {[%cal Rf5f4] Hoping for ...f4.} (19... Qe5 $2 20. Nf3 $18) 20. Rfe1 ({Avoid the trap} 20. Nxf5 $2 Bxf5 21. Qd4 (21. Bxf5 $2 Qe5 $19 {[%mdl 64] Double Attack}) 21... Bxd3 $19) 20... Bc5 $1 {[%cal Rc5a7]} 21. Qa5 {[#]} (21. Nxf5 $15 Bxf5 22. Bxc5 Qxe1+ 23. Rxe1 Rxe1+ 24. Kh2 (24. Bf1 Bd3 $15) 24... Bxd3 25. Be3) 21... b6 $1 $19 {[%cal Rb6a5]} 22. Qa6 {[#]} Bxd4 $1 23. Bxd4 (23. Bxf5 {was necessary.} Bxf5 24. Rxd4) 23... Qxe1+ 24. Rxe1 Rxe1+ 25. Bf1 {aiming for Bc3.} Rcc1 {Threatens to win with ...b5.} 26. Bxb6 f4 27. Bd8 (27. Ba5 $142 Rxf1+ 28. Qxf1 Rxf1+ 29. Kxf1) 27... Bf5 {And now ...Red1 would win.} (27... Rxf1+ $2 28. Qxf1 Rxf1+ 29. Kxf1 $19) 28. g4 $2 (28. f3 Nh7 29. a4) 28... hxg3 {( -> ...Bxh3). Black is clearly winning.} 29. fxg3 Bxh3 30. gxf4 gxf4 {Accuracy: White = 37%, Black = 74%.} (30... Bxf1 $142 31. Qa5 Re2) 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.14"]
[Round "4.3"]
[White "Niemann, Hans Moke"]
[Black "Hilby, Craig"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2467"]
[BlackElo "2433"]
[PlyCount "33"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[TimeControl "40/5400+30:1800+30"]

1. Nf3 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} g6 {[%emt 0:00:00]} 3. Nc3 {[%emt 0:00:00]} d5 {[%emt 0:00:03]} 4. cxd5 {[%emt 0:00:00]} Nxd5 {[%emt 0:00:06]} 5. Qb3 {[%emt 0:00:00]} Nb6 {[%emt 0:00:46]} 6. d4 {[%emt 0:00:00]} Bg7 {[%emt 0:00:12]} 7. Bf4 {[%emt 0:00:02]} Be6 {[%emt 0:02:01]} 8. Qa3 {[%emt 0:00:10]} c5 {[%emt 0:01:08]} 9. e4 {[%emt 0:00:05]} cxd4 {[%emt 0:02:15]} 10. Nb5 {[%emt 0:00:02]} O-O {[%emt 0:00:07]} 11. Nc7 {[%emt 0:00:01]} Nc6 {[%emt 0:00:05]} 12. Nxa8 {[%emt 0:00:04]} Qxa8 {[%emt 0:00:04]} 13. Rc1 {[%emt 0:00:01]} f5 {[%emt 0:01:55]} 14. e5 {[%emt 0:00:01]} Nd5 {[%emt 0:00:05]} 15. Bd2 {[%emt 0:00:01]} Nxe5 {[%emt 0:00:05]} 16. Nxd4 {[%emt 0:00:02]} Nb6 {[%emt 0:00:06]} 17. Nxe6 {[%emt 0:00:04]} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.14"]
[Round "4.4"]
[White "Checa, Nicolas"]
[Black "Tang, Andrew"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2506"]
[BlackElo "2495"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,75,9,6,23,18,17,18,36,24,43,21,45,41,85,86,107,110,97,104,159,151,151,152,154,150,147,147,150,175,171,166,182,183,169,112,110,111,111,114,109,106,120,107,113,107,111,103,528,527,1022,667,641,308,647,631,29986,1124,29996,1912]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Bd3 Nbd7 {[%cal Bb8d7,Bd7f8,Bf8e6][%mdl 32]} 8. Qc2 Nf8 9. Nge2 Ne6 10. Bh4 h6 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2)} (10... g6 11. f3 b5 12. O-O O-O 13. Rad1 Re8 14. Qd2 a5 15. Bf2 Bd7 16. Rc1 Rc8 17. Rfe1 b4 18. Na4 c5 19. Nxc5 Nxc5 20. dxc5 Rxc5 {0-1 (56) Lenderman,A (2637)-Abasov,N (2627) Astana 2019}) 11. f3 O-O 12. O-O b6 {The position is equal.} 13. Rad1 Bb7 14. Kh1 Qc7 $146 ({Predecessor:} 14... Kh8 15. Bf5 Ne8 16. Bg3 {1-0 (49) Levin,E (2512)-Tkachev,I (2117) St Petersburg 2012}) 15. Bf5 c5 16. dxc5 Qxc5 {[#]} 17. Bxe6 $1 fxe6 {[#]} 18. Nf4 $1 Qc8 (18... Rf7 $142) 19. Ng6 $1 $16 {[%csl LRe7,LRf8][%mdl 64] Double Attack} Re8 20. Nxe7+ Rxe7 21. Bxf6 $1 gxf6 22. Qg6+ Rg7 23. Qxf6 Kh7 24. e4 dxe4 25. fxe4 Qc6 26. Rd3 (26. Qe5 $18) 26... Rag8 27. Rh3 {[%csl Gf6][%cal Rh3h6]} Rg6 28. Qe7+ $40 {[%mdl 128] White is out for blood.} R8g7 29. Rf7 Rxf7 30. Qxf7+ Rg7 31. Qf4 Rg6 32. Rd3 {And now Rd8 would win.} b5 $2 {[%mdl 8192]} (32... Qe8 $16 {is more resistant.}) 33. Rd8 $18 {Strongly threatening Qb8.} b4 34. Qf8 {[%csl Gd8][%cal Rf8h8]} Rg7 35. Qh8+ Kg6 36. Rd3 {Intending Rg3+ and mate.} Qc4 37. Ne2 (37. Rg3+ $142 Kh5 38. Qe8+ Kh4 39. Qd8+ Rg5 40. Rh3+ Kg4 41. Qd1+ Qe2 42. Qxe2+ Kf4 43. Qe3+ Ke5 44. Qc5+ {[%mdl 64] Double Attack} Kf6 45. Rxh6+ Rg6 46. Qf8+ Ke5 47. Rh5+ Rg5 48. Rxg5+ Kd4 49. Qf2+ Kc4 50. Qe2+ Kd4 51. Nb5#) 37... Rf7 38. Qg8+ {Accuracy: White = 66%, Black = 43%.} (38. Rg3+ $142 Kh5 39. Rh3+ Kg5 40. Qxh6+ Kg4 41. Qh5#) 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.14"]
[Round "4.5"]
[White "Jacobson, Brandon"]
[Black "Yu, Jennifer"]
[Result "1-0"]
[ECO "A35"]
[WhiteElo "2456"]
[BlackElo "2341"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,57,56,40,88,79,79,86,84,87,103,74,74,75,73,54,59,58,77,70,68,67,76,37,68,55,63,54,62,68,87,92,341,333,1175,1156,1166,1127,1134,1123,1131,1112]} 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 g6 6. e4 Bg7 7. Be3 O-O 8. Be2 d6 9. O-O Nd7 10. Qd2 Nde5 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} (10... Nc5 11. f3 Ne6 12. Nxe6 Bxe6 13. Nd5 b6 14. Rac1 Rc8 15. f4 Qd7 16. b4 Rfd8 17. a3 Rf8 18. Kh1 f5 19. Bf3 {1-0 (53) Krush,I (2431)-Vo,T (2380) Riadh 2017}) 11. f4 Nxd4 12. Bxd4 Nc6 {White is better.} 13. Bxg7 Kxg7 14. Kh1 $146 ({Predecessor:} 14. f5 Qb6+ 15. Kh1 Qd4 16. Qe1 Qe5 17. Rd1 gxf5 18. Rd5 {1-0 (31) Lopez Hernandez,C (2321)-Gutierrez Herrera,J (2142) Medellin 2014}) 14... f6 15. Rad1 Be6 16. a3 {[%cal Ba2a3,Ba3a4][%mdl 32]} Rc8 17. b4 b6 18. Qe3 Qc7 19. Nd5 Qb7 20. Rb1 Nd8 21. a4 Bf7 22. Rfd1 Qd7 23. Ra1 Nc6 {[#]} 24. c5 $1 e6 $2 {[#]} (24... bxc5 $16 25. bxc5 dxc5) 25. Nxf6 $1 $18 {[%mdl 512]} Kxf6 $2 (25... Qe7 26. e5 (26. cxb6 Qxf6 27. b5 axb6 $16) 26... dxe5) 26. Qc3+ {White is clearly winning.} Ke7 27. cxd6+ Kd8 28. Rac1 Be8 29. Ba6 {Accuracy: White = 54%, Black = 45%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.15"]
[Round "5.1"]
[White "Yu, Jennifer"]
[Black "Vaidya, Atulya"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "2341"]
[BlackElo "2118"]
[Annotator "RC"]
[PlyCount "82"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[TimeControl "40/5400+30:1800+30"]

1. Nf3 {[%emt 0:00:00]} f5 {[%emt 0:00:00]} 2. c4 {[%emt 0:02:02]} g6 {[%emt 0:00:00]} 3. Nc3 {[%emt 0:02:15]} Nf6 {[%emt 0:00:03]} 4. g3 {[%emt 0:00:39]} Bg7 {[%emt 0:00:11]} 5. Bg2 {[%emt 0:00:25]} d6 {[%emt 0:00:13]} 6. O-O {[%emt 0:03:00]} O-O {[%emt 0:00:34]} 7. d3 {[%emt 0:01:48]} c6 {[%emt 0:01:12]} 8. Rb1 {[%emt 0:03:14]} a5 {[%emt 0:01:38]} 9. a3 {[%emt 0:00:42]} Re8 {[%emt 0:07:43]} 10. e4 {[%emt 0:06:24]} e5 {[%emt 0:09:26]} 11. b4 {[%emt 0:02:15]} Na6 {[%emt 0:04:15]} 12. Qb3 {[%emt 0:13:25]} h6 {[%emt 0:04:07]} 13. Nh4 {[%emt 0:02:34]} Kh7 {[%emt 0:00:35]} 14. exf5 {[%emt 0:10:34]} g5 {[%emt 0:01:11]} 15. Nf3 {[%emt 0:01:46]} Bxf5 {[%emt 0:02:16]} 16. Ne1 {[%emt 0:03:50]} Rb8 {[%emt 0:06:34]} 17. Ne4 {[%emt 0:02:26]} axb4 {[%emt 0:04:37]} 18. axb4 {[%emt 0:00:22]} Nc7 {[%emt 0:00:34]} 19. Be3 {[%emt 0:09:21]} Qd7 {[%emt 0:07:19]} 20. Nc2 {[%emt 0:02:24]} d5 {[%emt 0:01:12]} 21. Nxf6+ {[%emt 0:07:50]} Bxf6 {[%emt 0:00:13]} 22. cxd5 {[%emt 0:03:52]} cxd5 {[%emt 0:01:31]} 23. Ba7 {[%emt 0:05:47]} Rbc8 {[%emt 0:01:09]} 24. b5 Be6 {[%emt 0:05:37]} 25. d4 {[%emt 0:08:22]} e4 {[%emt 0:03:04]} 26. f3 {[%emt 0:01:48]} exf3 {[%emt 0:02:47]} 27. Rxf3 {[%emt 0:00:47]} Bg7 {[%emt 0:00:30]} 28. Qd3+ {[%emt 0:01:19]} Kh8 {[%emt 0:00:09]} 29. Bc5 {[%emt 0:01:03]} Bg4 {[%emt 0:00:39]} 30. Rf2 {[%emt 0:00:27]} Ne6 {[%emt 0:02:04]} 31. Ba3 {[%emt 0:03:33]} Bh5 {[%emt 0:04:51]} 32. Bb2 {[%emt 0:00:47]} Nf8 {[%emt 0:00:07]} 33. Ne3 {[%emt 0:00:18]} Bg6 {[%emt 0:00:37]} 34. Nf5 {[%emt 0:00:02]} Ne6 {[%emt 0:00:56]} 35. Qb3 {[%emt 0:01:29]} Bxf5 {[%emt 0:00:36]} 36. Rxf5 {[%emt 0:00:04]} Nf4 {[%emt 0:01:29]} 37. Rxf4 {[%emt 0:00:53]} gxf4 {[%emt 0:00:08]} 38. gxf4 {[%emt 0:00:08]} Qf5 {[%emt 0:00:18]} 39. Rf1 {[%emt 0:00:39]} Rc4 {[%emt 0:00:10]} 40. Kh1 {[%emt 0:00:00]} Re2 {[%emt 0:00:00]} 41. Bf3 {[%emt 0:08:37]} Qh3 {[%emt 0:00:45]} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.15"]
[Round "5.2"]
[White "Tang, Andrew"]
[Black "Jacobson, Brandon"]
[Result "1-0"]
[ECO "E32"]
[WhiteElo "2495"]
[BlackElo "2456"]
[Annotator "TA"]
[PlyCount "135"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,135,2,0,-3,0,0,1,0,-10,-13,-5,0,-14,18,22,21,14,13,9,9,16,20,18,0,0,5,5,10,15,88,88,84,18,10,20,9,4,6,6,6,8,8,7,32,0,0,0,25,25,31,26,35,25,25,25,25,18,25,11,18,5,5,5,14,11,16,11,50,33,50,56,58,50,76,75,90,75,79,73,80,35,37,37,118,118,129,83,90,90,90,73,90,90,90,90,90,90,90,90,90,90,81,0,90,90,96,96,75,91,52,0,0,0,0,8,8,8,8,8,8,8,29979,29979,29979,29982,29981,29982]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 d5 6. Bg5 c5 {E32: Nimzo-Indian: Classical (4 Qc2): 4...0-0} (6... h6 7. Bxf6 Qxf6 8. a3 Bxc3+ 9. Qxc3 dxc4 10. Qxc4 Nc6 11. Qc3 Re8 12. Ne5 Rb8 13. g3 Rd8 14. e3 Nxe5 15. dxe5 {0-1 (110) Topalov,V (2740)-Ding,L (2812) Shamkir 2019}) 7. cxd5 exd5 8. dxc5 h6 {The position is equal.} 9. Bh4 Nbd7 ({Don't play} 9... Bxc5 10. Bxf6 Qxf6 11. Nxd5 $14) 10. e3 g5 11. Bg3 Ne4 12. Bd6 Re8 $146 ({Predecessor:} 12... Qa5 13. Bd3 Nxc3 14. O-O Re8 15. bxc3 Bxc5 {½-½ (53) Saduakassova,D (2472)-Van Foreest,L (2502) Wijk aan Zee 2019}) 13. Bd3 Ndxc5 14. Bxc5 Bxc3+ 15. bxc3 Nxc5 16. O-O Bd7 17. Nd4 Rc8 18. Bh7+ Kh8 19. Bf5 Qf6 (19... Rc7 $11 {keeps the balance.}) 20. Bxd7 $16 Nxd7 21. Rad1 (21. Qa4 $16 Nc5 22. Qxa7) 21... Nc5 22. Ne2 Red8 23. Rd4 Ne6 24. Rd2 d4 25. exd4 Nxd4 26. Nxd4 Rxd4 27. Rxd4 (27. cxd4 $5 {[%cal Rc2c8]} Rxc2 28. Rxc2 $11) 27... Qxd4 $11 {[%mdl 4096] Endgame KQR-KQR} 28. Qf5 Qxc3 29. Qxf7 Qg7 30. Qe6 Rf8 31. Rd1 Qf6 32. Qe3 b6 33. h3 Kg7 34. Rd4 Rd8 35. Re4 {Threatening Re7+.} Rd1+ 36. Kh2 Rd7 37. h4 Rf7 38. hxg5 Qxg5 39. Qe2 {Hoping for Rg4.} (39. Qe1 {is more complex.} Qh5+ 40. Kg1 Rd7 41. Qc3+ Kh7 42. Re1) 39... Kh7 40. g3 Qc5 41. Re3 Qf5 42. Kg1 Qb1+ 43. Kg2 $1 Qg6 44. Re6 Qf5 45. Qe3 Qd5+ 46. f3 Qg5 (46... Rxf3 $1 $14 47. Qxh6+ Kg8) 47. Qe4+ Kg7 48. f4 Qf5 49. Qd4+ Kh7 50. Qd6 Qh5 51. Qd3+ Kg7 52. Qd4+ Kh7 53. Re8 Rg7 54. Qd8 {White wants to mate with Rh8+.} Rg8 55. Qd7+ Rg7 56. Qd8 {Intending Rh8+ and mate.} Rg8 $1 57. Qd3+ Qg6 58. Re7+ Rg7 59. Qxg6+ Kxg6 60. Rxg7+ (60. Re6+ $14 Kh7 61. Kh3) 60... Kxg7 $16 {K3P-K3P} 61. g4 Kg6 62. Kf3 h5 $1 {[%cal Rh5h4]} 63. gxh5+ Kxh5 64. Ke4 Kg6 65. Ke5 {Threatens to win with Ke6.} Kf7 $2 {[%mdl 8192]} (65... b5 $11) 66. Kd6 {White mates.} Kf6 {[#]} 67. Kc6 $1 Kf5 {[#]} 68. a4 $1 {Accuracy: White = 69%, Black = 63%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.15"]
[Round "5.3"]
[White "Hilby, Craig"]
[Black "Checa, Nicolas"]
[Result "0-1"]
[ECO "E10"]
[WhiteElo "2433"]
[BlackElo "2506"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,82,11,-8,-13,-11,-22,-30,-26,-16,-6,-43,-35,-45,-43,-58,-13,-7,0,-8,-10,-216,-220,-233,-205,-320,-330,-325,-309,-313,-323,-281,-57,-52,-61,-132,-139,-157,-157,-157,-157,-157,-157,-173,-172,-169,-166,-166,-165,-158,0,-166,-172,-166,-156,-154,-145,-243,-215,-243,-243,-299,-299,-282,-215,-461,-427,-659,-429,-415,-408,-408,-363,-337,-318]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Nbd2 dxc4 6. Bg2 b5 {E04: Open Catalan: 5 Nf3} 7. O-O O-O 8. a4 c6 {Black has an edge.} 9. axb5 (9. b3 c3 10. Nb1 Bb7 11. Qc2 c5 12. Nxc3 cxd4 13. Nxb5 Nc6 14. Qc4 Qe7 15. Nbxd4 {1-0 (33) Caruana,F (2819)-Naiditsch,A (2695) Karlsruhe/Baden Baden 2019}) 9... cxb5 10. Ng5 (10. Ne1 $5 {[%cal Rg2a8]} Nd5 11. Nc2 $11) 10... Nd5 11. e4 $1 {[%cal Re4d5]} Nc7 ({Of course not} 11... Qxg5 $6 12. Nxc4 Qd8 13. exd5 $14) 12. Nxh7 Kxh7 13. e5 g6 14. Bxa8 Nxa8 {[#]} 15. Rxa7 $146 (15. Qf3 $1 $11) ({Predecessor:} 15. Qf3) 15... Qxd4 $19 {[%mdl 64] Double Attack} 16. Rxa8 Bb7 17. Ra1 (17. Rxb8 $142 Rxb8 18. Nf3) 17... Rd8 18. Qe2 {and if Nf3 works, White does fine.} Bxd2 19. Rd1 {[%cal Re2d2]} Qd5 {[%csl Gb7][%cal Rd5h1]} 20. f3 {[%cal Rd1d2] [#]} Nc6 $2 ({Black should try} 20... Qc5+ $1 $19 21. Qf2 Qxf2+ 22. Kxf2 {[#]} Ba5 $1 {[%mdl 512]} 23. Rxd8 Bxd8) 21. Rxd2 $15 Nd4 $40 {[%mdl 128] Black attacks.} 22. Rxd4 (22. Kf2 $1 $15 Nxe2 23. Rxd5 Rxd5 24. Kxe2) 22... Qxd4+ $17 23. Kg2 Qd1 24. Qxd1 Rxd1 {[%mdl 4096] Endgame KRB-KRB} 25. Kf2 Bd5 26. h4 b4 27. Ke2 Rh1 28. Kf2 Kg8 29. Ke2 Kh7 30. Kf2 $1 b3 31. Ke3 Rf1 32. Kd4 Rxf3 33. Bg5 (33. Bf4 $17 {might work better.}) 33... Rd3+ $19 34. Kc5 c3 35. bxc3 Rxc3+ 36. Kd4 Rxg3 37. Bf6 $2 (37. Rf1) 37... Kh6 38. Rf1 (38. Rb1 $142 Kh5 39. Rb2) 38... Rg2 {White must now prevent ...b2.} 39. Kc3 Rc2+ 40. Kb4 Kh5 {And now ...b2 would win.} 41. Bg5 Re2 {Accuracy: White = 56%, Black = 79%.} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.15"]
[Round "5.4"]
[White "Liang, Awonder"]
[Black "Niemann, Hans Moke"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "2592"]
[BlackElo "2467"]
[PlyCount "47"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]

{[%evp 10,46,12,13,0,0,10,21,28,20,46,36,43,35,45,33,45,45,66,56,56,57,58,46,90,81,66,15,51,51,47,53,38,61,104,120,305,253,29999]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. Bxc6 bxc6 5. d3 Ne7 6. Qe2 d6 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6} 7. O-O (7. e5 dxe5 8. Qxe5 Ng6 9. Qe4 Qd5 10. Nc3 Qxe4+ 11. Nxe4 f5 12. Ned2 Be7 13. Nc4 Ba6 14. Nfe5 Nxe5 15. Nxe5 {½-½ (43) Onischuk,V (2637)-Yu,Y (2751) Riadh 2017}) 7... e5 8. c3 Ba6 $146 {The position is equal.} ({Predecessor:} 8... Ng6 9. d4 cxd4 10. cxd4 Be7 11. dxe5 dxe5 12. Be3 Qa5 13. Rd1 O-O {1-0 (46) Krantz,C (2233)-Karlsson,U (1978) Malmo 2013}) 9. Rd1 g6 10. Qc2 Bg7 11. d4 cxd4 12. cxd4 exd4 13. Nxd4 Bb7 14. Bf4 O-O 15. Nb3 Nc8 16. Nc3 Qf6 17. Qd2 a5 18. a4 (18. e5 $14 dxe5 19. Be3) 18... Qe6 19. Nd4 Qe7 20. Bh6 Bxh6 21. Qxh6 Nb6 {[#]} 22. Rd3 $1 {Black must now prevent Nf5!} Qe5 $2 {[#]} (22... Rfd8 $16 {might work better.}) 23. Nf5 $1 $18 {[%mdl 512] Rh3 would kill now.} f6 $2 (23... Rfe8 $18) (23... gxf5 24. f4) 24. Qg7# {Accuracy: White = 74%, Black = 39%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.15"]
[Round "5.5"]
[White "Sheng, Joshua"]
[Black "Burke, John M"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2449"]
[BlackElo "2562"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,77,33,36,43,40,46,40,62,13,16,0,63,20,15,10,16,14,12,22,33,0,0,0,0,-7,28,39,56,48,62,54,52,45,61,30,96,41,59,8,20,0,0,-43,15,-86,0,0,18,0,0,0,81,89,95,93,1826,919,1478,437,5616,5608,5583,5561,5531,5516,5181,5069]} 1. c4 c6 2. Nf3 g6 3. d4 Bg7 4. e4 d6 5. h3 Nf6 6. Nc3 O-O 7. Bd3 Na6 {E90: King's Indian: Classical: Early deviations and 6 h3} 8. Be3 e5 9. d5 Nh5 {White is slightly better.} 10. g3 cxd5 11. cxd5 Bd7 $146 (11... Qe7 $11) ({Predecessor:} 11... Nc5 12. Be2 f5 13. exf5 gxf5 14. Ng5 Nf6 15. Bxc5 dxc5 {0-1 (36) Salem,A (2656)-Banikas,H (2568) Doha 2016}) 12. Nd2 Nb4 13. Bb1 b5 14. a3 Na6 15. Bd3 b4 16. Bxa6 bxc3 17. bxc3 Qa5 18. Be2 Qxc3 19. Rc1 $36 {[%mdl 2048] White has the initiative.} Qxa3 20. Nc4 Qb4+ 21. Bd2 Qb8 22. Rb1 Qd8 23. Nxd6 (23. Ba5 $5 {[%cal Ra5d8]} Qf6 24. Rb7 $16) 23... Qf6 (23... Rb8 $11) 24. Nb7 (24. Nc4 $16) 24... Rfb8 $14 25. Ba5 (25. Be3 $14) 25... Bf8 $1 $11 26. Qc2 Rc8 27. Qd3 Rab8 (27... a6 $1 $15 28. Qe3 Bb5) 28. Bg4 (28. d6 $11 {keeps the balance.}) 28... Rxb7 (28... Bxg4 $17 29. hxg4 Rxb7 30. Rxb7 Rc1+ 31. Ke2 Rxh1 32. gxh5 Bc5) 29. Rxb7 Bxg4 30. hxg4 {[#] Strongly threatening 0-0.} Rc1+ 31. Ke2 Nxg3+ (31... Rxh1 $11 {remains equal.} 32. gxh5 Bc5) 32. Qxg3 $16 Rxh1 33. Rxa7 {Black must now prevent g5.} Bc5 $2 {[%mdl 8192]} (33... h6 $16) 34. Ra8+ {White is clearly winning.} Kg7 35. Bc7 (35. g5 $142 Qd6 36. Bd8) 35... Bd4 (35... Qg5 $142) 36. g5 $18 Qf4 37. Qxf4 exf4 38. d6 {[#] d7 would kill now.} Be5 39. Re8 {Accuracy: White = 32%, Black = 41%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.17"]
[Round "6.1"]
[White "Vaidya, Atulya"]
[Black "Burke, John M"]
[Result "1/2-1/2"]
[ECO "E10"]
[WhiteElo "2118"]
[BlackElo "2562"]
[Annotator "ChessBase"]
[PlyCount "102"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 4. cxd5 {[%emt 0:00:08]} exd5 {[%emt 0:00:00]} 5. Qc2 {[%emt 0:00:09]} Nc6 {[%emt 0:03:14]} 6. a3 {[%emt 0:05:28]} Bd6 {[%emt 0:02:50]} 7. Bg5 {[%emt 0:00:25]} h6 {[%emt 0:00:25]} 8. Bh4 {[%emt 0:03:43]} Qe7 {[%emt 0:04:08]} 9. Bxf6 {[%emt 0:14:23]} Qxf6 {[%emt 0:00:17]} 10. e3 {[%emt 0:00:21]} Ne7 {[%emt 0:06:53]} 11. Bd3 {[%emt 0:00:53]} g5 {[%emt 0:08:30]} 12. Nc3 {[%emt 0:08:09]} g4 {[%emt 0:02:50]} 13. Nd2 {[%emt 0:02:22]} c6 {[%emt 0:00:56]} 14. b4 {[%emt 0:05:08]} Nf5 {[%emt 0:10:33]} 15. g3 {[%emt 0:15:13]} Kf8 {[%emt 0:11:55]} 16. Nb3 {[%emt 0:03:26]} Kg7 {[%emt 0:00:51]} 17. Qe2 {[%emt 0:01:27]} h5 {[%emt 0:01:22]} 18. Rf1 {[%emt 0:04:42]} Re8 {[%emt 0:02:52]} 19. Kd2 {[%emt 0:03:20]} b6 {[%emt 0:03:32]} 20. h3 {[%emt 0:00:27]} Qg5 {[%emt 0:01:14]} 21. hxg4 {[%emt 0:00:29]} hxg4 {[%emt 0:00:52]} 22. f4 {[%emt 0:08:21]} gxf3 {[%emt 0:06:24]} 23. Rxf3 {[%emt 0:00:13]} c5 {[%emt 0:02:46]} 24. bxc5 {[%emt 0:09:01]} bxc5 {[%emt 0:00:34]} 25. Nb5 {[%emt 0:01:35]} a6 {[%emt 0:14:06]} 26. Rxf5 {[%emt 0:02:41]} Bxf5 {[%emt 0:00:14]} 27. Nxd6 {[%emt 0:00:06]} Bxd3 {[%emt 0:00:04]} 28. Nxe8+ {[%emt 0:00:07]} Rxe8 {[%emt 0:00:05]} 29. Qxd3 {[%emt 0:00:04]} c4 {[%emt 0:00:09]} 30. Qc3 {[%emt 0:00:07]} cxb3 {[%emt 0:01:00]} 31. Qxb3 {[%emt 0:00:06]} Re4 {[%emt 0:03:41]} 32. Qc3 {[%emt 0:01:29]} Rg4 {[%emt 0:01:15]} 33. Rg1 {[%emt 0:00:45]} Rxg3 {[%emt 0:00:06]} 34. Rxg3 {[%emt 0:00:06]} Qxg3 {[%emt 0:00:03]} 35. Qc6 {[%emt 0:00:47]} Qf2+ {[%emt 0:01:13]} 36. Kd3 {[%emt 0:00:09]} Qg2 {[%emt 0:02:02]} 37. Qd6 {[%emt 0:00:20]} a5 {[%emt 0:02:44]} 38. Qe5+ {[%emt 0:00:22]} Kg6 {[%emt 0:00:18]} 39. Qd6+ {[%emt 0:00:34]} f6 {[%emt 0:00:18]} 40. Qf8 {[%emt 0:00:00]} Qf1+ {[%emt 0:00:00]} 41. Kd2 {[%emt 0:00:28]} Qg2+ {[%emt 0:01:49]} 42. Kd3 {[%emt 0:00:08]} Qe4+ {[%emt 0:00:35]} 43. Kd2 {[%emt 0:00:09]} Kf5 {[%emt 0:01:08]} 44. Qc8+ {[%emt 0:01:04]} Qe6 {[%emt 0:00:05]} 45. Qc7 {[%emt 0:00:05]} Qg8 {[%emt 0:03:42]} 46. Qf4+ {[%emt 0:00:56]} Ke6 {[%emt 0:00:06]} 47. Qc7 {[%emt 0:00:12]} Qg2+ {[%emt 0:00:23]} 48. Kd3 {[%emt 0:00:10]} Qf1+ {[%emt 0:01:38]} 49. Kd2 {[%emt 0:00:07]} Qa6 {[%emt 0:00:55]} 50. Qd8 {[%emt 0:01:02]} Qb5 {[%emt 0:04:30]} 51. Qg8+ {[%emt 0:00:22]} Ke7 {[%emt 0:00:20]} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.17"]
[Round "6.2"]
[White "Niemann, Hans Moke"]
[Black "Sheng, Joshua"]
[Result "0-1"]
[ECO "A09"]
[WhiteElo "2467"]
[BlackElo "2449"]
[Annotator "ChessBase"]
[PlyCount "60"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} d4 {[%emt 0:00:57]} 3. g3 {[%emt 0:05:15]} Nc6 {[%emt 0:01:14]} 4. Bg2 {[%emt 0:02:33]} e5 {[%emt 0:00:15]} 5. d3 {[%emt 0:00:04]} Bb4+ {[%emt 0:00:33]} 6. Bd2 {[%emt 0:00:38]} Bxd2+ {[%emt 0:04:43]} 7. Nbxd2 {[%emt 0:01:03]} a5 {[%emt 0:02:19]} 8. a3 {[%emt 0:02:52]} a4 {[%emt 0:03:52]} 9. b4 {[%emt 0:00:50]} axb3 {[%emt 0:00:12]} 10. Qxb3 {[%emt 0:00:06]} Nf6 {[%emt 0:00:41]} 11. O-O {[%emt 0:00:33]} Nd7 {[%emt 0:03:54]} 12. Ne1 {[%emt 0:07:46]} O-O {[%emt 0:05:29]} 13. Qb5 {[%emt 0:01:28]} Ra6 {[%emt 0:10:12]} 14. f4 {[%emt 0:12:34]} Rb6 {[%emt 0:06:45]} 15. Qd5 {[%emt 0:00:50]} Rb2 {[%emt 0:01:52]} 16. Nef3 {[%emt 0:02:05]} Ne7 {[%emt 0:07:33]} 17. Qa5 {[%emt 0:00:05]} b6 {[%emt 0:01:15]} 18. Qa4 {[%emt 0:00:55]} exf4 {[%emt 0:04:46]} 19. Qd1 {[%emt 0:04:06]} Nc5 {[%emt 0:03:45]} 20. gxf4 {[%emt 0:01:13]} Nf5 {[%emt 0:00:58]} 21. Qc1 {[%emt 0:00:23]} Na4 {[%emt 0:00:28]} 22. Rf2 {[%emt 0:01:24]} Ne3 {[%emt 0:03:39]} 23. Ne1 {[%emt 0:05:18]} Ng4 {[%emt 0:09:00]} 24. Rf1 {[%emt 0:04:29]} Qe7 {[%emt 0:00:58]} 25. Ne4 {[%emt 0:01:53]} Rxe2 {[%emt 0:01:00]} 26. Ng3 {[%emt 0:03:28]} Nc3 {[%emt 0:02:14]} 27. Nf3 {[%emt 0:01:14]} Bb7 {[%emt 0:01:16]} 28. h3 {[%emt 0:01:49]} Ne3 {[%emt 0:02:16]} 29. Rf2 {[%emt 0:00:26]} Rxf2 {[%emt 0:01:11]} 30. Kxf2 {[%emt 0:00:03]} Qd6 {[%emt 0:01:15]} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.17"]
[Round "6.3"]
[White "Checa, Nicolas"]
[Black "Liang, Awonder"]
[Result "1/2-1/2"]
[ECO "A80"]
[WhiteElo "2506"]
[BlackElo "2592"]
[Annotator "ChessBase"]
[PlyCount "60"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} f5 {[%emt 0:00:00]} 2. Nc3 {[%emt 0:01:14]} Nf6 {[%emt 0:00:00]} 3. Bg5 {[%emt 0:00:09]} d5 {[%emt 0:00:00]} 4. e3 {[%emt 0:04:23]} e6 {[%emt 0:00:49]} 5. Nf3 {[%emt 0:03:08]} h6 {[%emt 0:13:56]} 6. Bf4 {[%emt 0:09:59]} g5 {[%emt 0:03:48]} 7. Bg3 {[%emt 0:00:17]} Bg7 {[%emt 0:02:16]} 8. Nb5 {[%emt 0:05:01]} Na6 {[%emt 0:00:09]} 9. c4 {[%emt 0:00:11]} O-O {[%emt 0:00:08]} 10. Bd3 {[%emt 0:05:48]} c6 {[%emt 0:06:30]} 11. Nc3 {[%emt 0:00:22]} Nc7 {[%emt 0:04:03]} 12. O-O {[%emt 0:04:54]} Nce8 {[%emt 0:04:57]} 13. Qc2 {[%emt 0:06:10]} Nd6 {[%emt 0:05:43]} 14. cxd5 {[%emt 0:01:35]} cxd5 {[%emt 0:00:06]} 15. Nb5 {[%emt 0:06:38]} Nxb5 {[%emt 0:08:29]} 16. Bxb5 {[%emt 0:00:06]} Bd7 {[%emt 0:00:32]} 17. Bd3 {[%emt 0:03:21]} Qb6 {[%emt 0:09:10]} 18. Bc7 {[%emt 0:03:07]} Qb4 {[%emt 0:00:06]} 19. a3 {[%emt 0:00:22]} Qe7 {[%emt 0:00:44]} 20. Rfc1 {[%emt 0:05:30]} Rfc8 {[%emt 0:02:29]} 21. Qd1 {[%emt 0:03:30]} Ba4 {[%emt 0:03:01]} 22. Qxa4 {[%emt 0:00:29]} Rxc7 {[%emt 0:00:05]} 23. Rc2 {[%emt 0:00:33]} a6 {[%emt 0:01:44]} 24. Rac1 {[%emt 0:00:36]} Rac8 {[%emt 0:00:06]} 25. Ne5 {[%emt 0:02:17]} Rxc2 {[%emt 0:10:18]} 26. Rxc2 {[%emt 0:00:14]} Rxc2 {[%emt 0:00:29]} 27. Qxc2 {[%emt 0:00:02]} Qd8 {[%emt 0:00:17]} 28. g3 {[%emt 0:04:15]} Nd7 {[%emt 0:02:24]} 29. Nf3 {[%emt 0:02:24]} Bf8 {[%emt 0:01:25]} 30. Ne5 {[%emt 0:03:36]} Nxe5 {[%emt 0:06:07]} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.17"]
[Round "6.4"]
[White "Jacobson, Brandon"]
[Black "Hilby, Craig"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2456"]
[BlackElo "2433"]
[Annotator "ChessBase"]
[PlyCount "74"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. b4 {[%emt 0:07:12]} c6 {[%emt 0:01:30]} 2. Bb2 {[%emt 0:00:15]} Qb6 {[%emt 0:02:50]} 3. a3 {[%emt 0:00:42]} a5 {[%emt 0:01:34]} 4. c4 {[%emt 0:00:31]} axb4 {[%emt 0:16:27]} 5. c5 {[%emt 0:00:21]} Qc7 {[%emt 0:05:32]} 6. axb4 {[%emt 0:00:08]} Rxa1 {[%emt 0:00:06]} 7. Bxa1 {[%emt 0:00:05]} d6 {[%emt 0:02:23]} 8. cxd6 {[%emt 0:15:33]} Qxd6 {[%emt 0:02:19]} 9. Qb3 {[%emt 0:00:42]} b5 {[%emt 0:12:50]} 10. e4 {[%emt 0:11:15]} Na6 {[%emt 0:11:17]} 11. Bc3 {[%emt 0:03:34]} Nf6 {[%emt 0:00:14]} 12. d3 {[%emt 0:11:26]} e5 {[%emt 0:04:17]} 13. Nf3 {[%emt 0:00:12]} Nd7 {[%emt 0:00:42]} 14. d4 {[%emt 0:05:28]} Nxb4 {[%emt 0:11:47]} 15. Be2 {[%emt 0:00:49]} Qe6 {[%emt 0:02:25]} 16. d5 {[%emt 0:09:07]} cxd5 {[%emt 0:00:50]} 17. Bxb4 {[%emt 0:28:31]} dxe4 {[%emt 0:01:34]} 18. Qxe6+ {[%emt 0:00:07]} fxe6 {[%emt 0:00:05]} 19. Bxf8 {[%emt 0:00:03]} exf3 {[%emt 0:00:12]} 20. Bxg7 {[%emt 0:00:03]} Rg8 {[%emt 0:00:40]} 21. gxf3 {[%emt 0:03:17]} Rxg7 {[%emt 0:00:10]} 22. Bxb5 {[%emt 0:00:02]} Kf8 {[%emt 0:04:00]} 23. Ke2 {[%emt 0:00:14]} Nb6 {[%emt 0:02:27]} 24. Rc1 {[%emt 0:00:34]} Bb7 {[%emt 0:00:57]} 25. Nd2 {[%emt 0:00:21]} Nd5 {[%emt 0:03:17]} 26. Kf1 {[%emt 0:00:06]} Nf4 {[%emt 0:02:50]} 27. Rc5 {[%emt 0:01:13]} Rg2 {[%emt 0:02:09]} 28. h4 {[%emt 0:01:33]} Rh2 {[%emt 0:01:25]} 29. Kg1 {[%emt 0:00:12]} Rxh4 {[%emt 0:04:02]} 30. Rxe5 {[%emt 0:00:01]} Rh6 {[%emt 0:00:28]} 31. Rc5 {[%emt 0:00:29]} Rg6+ {[%emt 0:00:35]} 32. Kf1 {[%emt 0:00:33]} h5 {[%emt 0:01:25]} 33. Rc4 {[%emt 0:00:13]} e5 {[%emt 0:01:33]} 34. Rc5 {[%emt 0:00:02]} Bd5 {[%emt 0:01:07]} 35. Bc4 {[%emt 0:00:58]} Rc6 {[%emt 0:00:32]} 36. Rxc6 {[%emt 0:00:09]} Bxc6 {[%emt 0:00:15]} 37. Kg1 {[%emt 0:00:34]} Kg7 {[%emt 0:00:17]} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.17"]
[Round "6.5"]
[White "Yu, Jennifer"]
[Black "Tang, Andrew"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2341"]
[BlackElo "2495"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,115,0,0,0,0,0,9,9,-10,0,0,0,2,25,0,13,11,4,8,0,0,0,0,16,0,27,0,-6,0,0,0,0,0,0,0,0,0,0,0,0,-9,0,0,0,0,0,0,0,-49,0,-8,0,0,0,0,0,-9,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Bb4 5. e3 O-O 6. a3 Bxc3+ 7. bxc3 {[%cal Bb2c3,Bc3c4][%mdl 32]} c6 8. Bd3 b6 9. O-O Ba6 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5} 10. cxd5 (10. Nd2 Nbd7 11. a4 e5 12. Ba3 c5 13. Qb1 Rc8 14. cxd5 Bxd3 15. Qxd3 Nxd5 16. c4 Nb4 17. Qc3 exd4 18. exd4 {½-½ (47) Melkumyan,H (2634)-L'Ami,E (2645) Germany 2013}) 10... Bxd3 11. Qxd3 cxd5 12. c4 Nc6 13. Bd2 Rc8 14. Rfc1 Ne4 15. Rc2 Nd6 16. cxd5 exd5 17. Bb4 Nxb4 $146 ({Predecessor:} 17... Qe7 18. Bxd6 {½-½ (18) Reddmann,H (2216)-Colpe,M (2402) Hamburg 2017}) 18. axb4 Qd7 19. Ne5 Qb7 20. Rac1 f6 21. Nf3 Rxc2 22. Rxc2 a5 23. bxa5 bxa5 24. Nd2 Nc4 25. h3 Rc8 26. Nxc4 Qb1+ 27. Kh2 {[#] aiming for Na3!} Rxc4 28. Rc3 Qxd3 29. Rxd3 $11 {[%mdl 4096] Endgame KR-KR} a4 30. Kg3 Kf7 31. Kf4 Ke6 32. h4 g6 33. f3 {The position is equal.} Rb4 34. Rc3 Rb6 35. g4 Ra6 {Hoping for ...a3.} 36. Ra3 h6 37. e4 g5+ 38. hxg5 hxg5+ 39. Ke3 Kd6 40. f4 gxf4+ 41. Kxf4 dxe4 42. Kxe4 Kc6 43. d5+ Kc5 44. Rc3+ Kb5 {...a3 is the strong threat.} 45. Kd4 a3 46. Rb3+ Ka4 47. Kc4 $1 Ra7 (47... a2 $5 48. Rb4+ $8 Ka3 49. Rb3+ Ka4 50. Rb4+ Ka5 51. Rb5+ Ka4 52. Rb4+ $11) 48. Rb4+ Ka5 {Strongly threatening ...a2.} 49. Kb3 {Threatens to win with Ra4+.} a2 50. Ra4+ {[%mdl 64] [#] Double Attack} Kb6 51. Rxa7 (51. Rxa2 Rxa2 52. Kxa2 Kc5 53. Kb3 Kxd5 54. Kc3 Ke5 55. Kd3 Kf4 56. Ke2 Kxg4 57. Kf2 Kf4 58. Ke2 Kg3 59. Ke3 f5 60. Ke2 f4 61. Kf1 Kf3 62. Ke1 Kg2 63. Kd2 f3 64. Kd3 f2 65. Ke4 f1=Q 66. Ke5 Qb5+ 67. Ke6 Kf3 68. Kf6 Qc6+ 69. Kg7 Kf4 70. Kh7 Qc7+ 71. Kg6 Qe7 72. Kh6 Kf5 73. Kh5 Qh7#) 51... Kxa7 52. Kxa2 {Intending Ka3 and mate. KPP-KP} Kb6 53. Kb3 {Threatening mate with Kb4.} Kc5 54. Kc3 Kxd5 55. Kd3 Ke5 {( -> ...Kf4)} 56. Ke3 f5 57. gxf5 Kxf5 58. Kd4 {Accuracy: White = 72%, Black = 66%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.18"]
[Round "7.1"]
[White "Tang, Andrew"]
[Black "Vaidya, Atulya"]
[Result "1-0"]
[ECO "E70"]
[WhiteElo "2495"]
[BlackElo "2118"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,85,44,57,61,64,66,56,83,68,103,122,117,104,92,107,138,98,179,100,186,199,187,171,326,322,614,615,618,496,601,561,518,322,322,308,405,190,211,209,180,65,62,64,74,64,75,66,68,70,78,68,85,74,125,111,121,114,438,414,452,410,469,433,423,412,466,453,479,0,452,427,29974,29972,29984,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 O-O 6. Ng3 Nc6 7. d5 Nb8 {E70: King's Indian: Miscellaneous lines with 4 e4, including 5 Nge2 and 5 Bd3 0-0 6 Nge2} (7... Ne5 8. Be2 c6 9. f4 Ned7 10. Be3 a6 11. O-O Rb8 12. Kh1 cxd5 13. cxd5 b5 14. Bf3 Nb6 15. Bd4 Nfd7 16. Bxg7 Kxg7 {½-½ (49) Ivanisevic,I (2603)-Guseinov,G (2664) Skopje 2018}) 8. Be2 e5 9. Be3 Ne8 $146 {White is slightly better.} ({Predecessor:} 9... c6 10. Qd2 h5 11. Bg5 Qc7 12. Bxf6 Bxf6 13. h4 Qe7 14. Bxh5 gxh5 15. Nxh5 Kh7 16. O-O-O Bg4 17. Nxf6+ Qxf6 18. f3 Bd7 19. dxc6 {½-½ (19) Van Essen,M-Quist,P Hengelo 1994}) 10. Qd2 f5 11. exf5 gxf5 {Hoping for ...f4.} 12. Bg5 Bf6 13. h4 a5 14. O-O-O Na6 (14... Ng7 $16) 15. f4 (15. Nh5 $1 $18) 15... Nc5 (15... Ng7 $16) 16. Nh5 $1 $18 Bxg5 17. hxg5 ({Stronger than} 17. fxg5 Bd7 $11) 17... exf4 $2 (17... a4 18. g6 Ra6) 18. Qxf4 ({Less strong is} 18. Nxf4 Qxg5 19. Rh5 Qe7 $14) 18... Ne4 $2 (18... Nd7 19. g6 Qe7 20. gxh7+ Kh8) 19. Nxe4 fxe4 20. Qh4 Qe7 21. Rdf1 {aiming for Nf6+.} Bf5 {[#]} 22. Nf6+ $1 {[%mdl 512]} Nxf6 23. gxf6 Qe5 24. Qg5+ ({Not} 24. Bg4 Bg6 $18) (24. Bh5 $142 {Rxf5! would kill now.} Qxf6 25. Qxf6 Rxf6 26. g4) 24... Bg6 25. Qxe5 dxe5 26. Kd2 (26. g4 $1 $18) 26... Ra6 $14 27. Ke3 Raxf6 28. Rxf6 Rxf6 {[%mdl 4096] Endgame KRB-KRB} 29. c5 Kf8 30. a3 {[%cal Ba2a3,Ba3b4,Bb4c5][%mdl 32]} Ke7 31. b4 axb4 32. axb4 b6 (32... Rf5 $142) 33. Ra1 $1 $16 {Strongly threatening d6+!} bxc5 34. bxc5 Bf5 $2 {[%mdl 8192]} (34... Bf7 $16 {is a better chance.}) 35. g4 Bg6 36. Ra7 Kd8 37. Ra8+ Ke7 38. g5 Rf5 39. Ra7 {Threatens to win with d6+.} Kd8 40. Ra8+ Ke7 41. Rc8 $1 {[%cal Rc8c7]} Kd7 {[#]} (41... Rxg5 $18 42. Rxc7+ Kf6) 42. Bg4 $1 Ke7 43. Be2 $2 {[%mdl 32768] Accuracy: White = 56%, Black = 20%. . Loss on time!?} (43. Bxf5 {mates} Bxf5 44. Rxc7+ Kd8 45. Ra7 Kc8 46. c6 Kb8 {[#]} 47. d6 $1 {[%mdl 512]} Kxa7 48. d7) 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.18"]
[Round "7.2"]
[White "Hilby, Craig"]
[Black "Yu, Jennifer"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2433"]
[BlackElo "2341"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,79,10,33,18,47,29,25,10,25,18,20,20,21,20,15,17,12,15,18,12,12,12,13,16,19,19,30,30,30,22,27,22,42,33,45,30,37,33,34,36,34,45,47,54,56,37,57,57,93,99,90,82,117,91,1128,1122,885,191,370,220,192,70,63,0,398,259,29996,29997,29997,29998,29998,29999]} 1. e3 c5 2. g3 $146 (2. Nf3 Nf6 3. b3 g6 4. Bb2 Bg7 5. g3 O-O 6. Bg2 d6 7. d4 cxd4 8. Nxd4 Bg4 9. Qd2 Nc6 10. Nxc6 bxc6 11. c4 Rc8 12. Nc3 Qa5 {½-½ (24) Bartel,M (2593)-Wojtaszek,R (2724) Chorzow 2019}) 2... Nc6 3. Bg2 e5 4. Ne2 d5 5. O-O Nf6 6. d4 {A00: Irregular Openings} cxd4 7. exd4 e4 8. Nbc3 {White has an edge.} Be7 9. f3 exf3 $1 10. Bxf3 Bg4 11. Nxd5 Bxf3 $1 12. Nxf6+ Bxf6 13. Rxf3 Nxd4 14. Rd3 {[%cal Re2d4]} Nxe2+ 15. Qxe2+ Qe7 16. Qxe7+ Kxe7 17. Bf4 Rhd8 18. Re1+ Kf8 19. Bd6+ Kg8 20. b3 h6 21. c4 b6 22. Red1 Rac8 23. Kg2 g5 24. Kf3 Re8 25. g4 Kg7 26. Re3 Red8 27. Rd5 Kg6 28. Red3 h5 29. gxh5+ Kxh5 {[#]} 30. h4 $1 {[%mdl 512]} Kxh4 31. Ke4 {And now Kf5 would win.} Kg4 $2 {[%mdl 8192]} (31... Bg7 $16) 32. Rg3+ $18 Kh4 33. Rf3 $2 (33. Rdd3 {Rh3+ would kill now.} g4 {[#]} 34. Kf5 $1 {[%mdl 576] Double Attack}) 33... Bh8 $2 ({Don't go for} 33... Re8+ $2 34. Kf5 $18) (33... Bb2 34. Rf2 (34. Rxf7 Kg4 $16) 34... f5+ 35. Kf3 (35. Rfxf5 Re8+ 36. Kd3 Re6 $14) (35. Rdxf5 Rxd6 36. Rxb2 g4 $15) 35... g4+ 36. Kg2 Rxd6 37. Rxd6 Ba3) 34. Rxf7 (34. Be7 $142 Re8 35. Rxf7) 34... Kg4 35. Rd1 ({Don't take} 35. Rxa7 Rc6 $16) (35. Rff5 $18 Re8+ 36. Kd3) 35... Re8+ $1 $14 36. Be7 (36. Kd5 $14) 36... Rc6 $2 {[%mdl 8192]} (36... Rc7 $11 {and Black is okay.} 37. Rg1+ Kh5) 37. Kd5 Rg6 $2 (37... Rc7 $18 38. Rg1+ Kh5) 38. Rg1+ {White mates.} Kh5 39. Rh7+ Rh6 40. Rxg5+ {Accuracy: White = 72%, Black = 39%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.18"]
[Round "7.3"]
[White "Liang, Awonder"]
[Black "Jacobson, Brandon"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2592"]
[BlackElo "2456"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,63,29,31,33,33,32,37,32,59,41,43,38,56,51,93,88,104,94,111,91,93,85,115,95,112,118,233,211,228,235,216,19,68,86,329,295,491,483,435,185,417,407,493,518,747,728,1269,1229,1712,1401,4886,2206,1891,1806,1222,1105]} 1. e4 c5 2. Nc3 d6 3. d4 cxd4 4. Qxd4 Bd7 (4... Nc6 5. Qd2 Nf6 6. b3 e6 7. Bb2 d5 8. exd5 exd5 9. O-O-O Be6 10. a3 Bc5 11. Nf3 {½-½ (49) Caruana,F (2819)-Vachier Lagrave,M (2773) Karlsruhe/Baden Baden 2019}) 5. b3 Nf6 6. Bb2 {B23: Closed Sicilian: Lines without g3} e5 7. Qd2 Bc6 $146 ({Predecessor:} 7... Be7 8. O-O-O Bc6 9. f3 Nxe4 10. Nxe4 Bxe4 11. Qb4 {0-1 (44) Stearman,J (2285)-Jacobson,B (2303) Charlotte 2018}) 8. f3 {White is slightly better.} Be7 9. h4 h5 10. O-O-O Nbd7 11. Kb1 $36 {[%mdl 2048] White has good play.} Qa5 12. Nh3 Qc5 13. Nf2 a6 14. g3 Qa7 15. f4 O-O 16. Bh3 b5 17. g4 hxg4 (17... a5 $16) 18. Nxg4 $18 Nxe4 19. Nxe4 Bxe4 20. Rhg1 $2 (20. Rhe1 $1 $18 {[%cal Re1e4]} Bf3 21. Nh6+ Kh8 22. Bxd7 Qxd7 23. fxe5 Bxd1 24. Qxd1) 20... Rac8 $11 21. Ne3 {[#]} f5 $2 ({Not} 21... Bxh4 $2 22. fxe5 Nxe5 23. Bxc8 $18) (21... Rxc2 $1 $16 {[%mdl 512] was called for.} 22. Nxc2 Rc8) 22. Bg2 $1 $18 Rf7 $2 (22... Nf6 23. Bxe4 Nxe4) 23. Bxe4 fxe4 24. Nd5 (24. h5 $142) 24... Bf8 $2 {[#]} (24... Bf6) 25. h5 $1 e3 26. Nxe3 {White is clearly winning.} Rxf4 27. h6 Nf6 28. hxg7 {[%mdl 64] Overworked Piece} Bxg7 29. Qxd6 Qf7 {[#]} 30. Qxe5 (30. Rxg7+ $142 $1 {[%mdl 512]} Kxg7 (30... Qxg7 31. Qe6+) 31. Qxe5) 30... Ng4 31. Nxg4 {Intending Nh6+ and mate.} Bxe5 32. Nxe5+ {Accuracy: White = 61%, Black = 31%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.18"]
[Round "7.4"]
[White "Sheng, Joshua"]
[Black "Checa, Nicolas"]
[Result "0-1"]
[ECO "C07"]
[WhiteElo "2449"]
[BlackElo "2506"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,112,35,47,0,9,7,17,0,18,23,17,17,12,11,8,-1,5,6,15,6,8,8,22,0,0,0,0,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-13,0,-4,12,20,13,13,19,0,0,0,0,-18,-15,-26,-26,-145,-152,-278,-244,-167,-99,-96,-96,-96,-96,-103,-100,-251,-233,-6427,-6312,-3998,-3979,-29968,-29969,-29969,-29970,-29970,-29971,-29972,-29971,-29970,-29969]} 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd6 7. O-O Nf6 8. Nb3 Nc6 9. Nbxd4 Nxd4 10. Nxd4 a6 11. Re1 Qc7 12. Bf1 {C07: French Tarrasch: 3...c5, 4 Ngf3 and 4 exd5 Qxd5} Be7 13. Qf3 O-O 14. Bf4 {The position is equal.} Bd6 15. Bxd6 Qxd6 16. Rad1 {With the idea Nxe6.} Qb6 17. Qb3 Qc7 {[#]} 18. Nf3 $146 ({Predecessor:} 18. c4 Bd7 19. Nf3 Rfd8 {0-1 (58) Karjakin,S (2781)-Grischuk,A (2761) Paris 2017}) 18... Bd7 19. Ne5 Rfd8 20. Nxd7 Rxd7 21. Rxd7 Qxd7 22. Qd3 Qxd3 23. Bxd3 $11 {[%mdl 4096] Endgame KRB-KRN} Kf8 24. a4 a5 25. Re5 b6 26. Rb5 Nd7 27. Kf1 (27. Bxh7 $2 g6 $17) 27... Ke7 28. Ke2 Kd6 29. Rg5 g6 30. Bb5 Nc5 31. Rg4 e5 32. c3 e4 33. Rh4 h5 34. f3 Ke5 35. Ke3 exf3 36. gxf3 Ra7 37. Rd4 g5 38. h4 f6 39. Be8 Re7 40. Bxh5 Rh7 41. Be8 Rxh4 42. b4 Ne6 43. Rxh4 (43. Rd7 $11) 43... gxh4 {KB-KN} 44. Bd7 (44. bxa5 $17 bxa5 45. Bb5) 44... Nf4 $19 {...h3 is the strong threat.} 45. Kf2 {[#]} axb4 (45... Nd3+ $1 $19 46. Ke3 Nf4) 46. cxb4 $17 Nd3+ 47. Ke3 Nxb4 {aiming for ...Nc2+.} 48. f4+ Kd6 49. Bh3 $2 (49. Bf5 $17) 49... Nd5+ $19 50. Kf3 $2 (50. Ke4) 50... Nc3 51. Kg4 Nxa4 52. Kxh4 b5 {[%cal Bb6b5,Bb5b4][%mdl 32] Black mates.} 53. Kg4 Nc3 ({Weaker is} 53... b4 54. Kf5 $17) 54. Bf1 b4 55. Kf5 Ke7 56. Bc4 {[#]} Nb1 $1 {Accuracy: White = 49%, Black = 79%.} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.18"]
[Round "7.5"]
[White "Burke, John M"]
[Black "Niemann, Hans Moke"]
[Result "1/2-1/2"]
[ECO "A35"]
[WhiteElo "2562"]
[BlackElo "2467"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,73,51,63,43,52,51,44,41,53,53,62,60,77,83,94,85,79,35,68,52,89,91,98,82,94,93,100,-95,0,0,0,-72,-83,-91,-91,-91,-91,-91,-85,-83,-83,-91,-82,-75,-21,-22,-22,-22,-11,-11,-11,-18]} 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 d6 6. e4 g6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 O-O 10. Qd2 Bd7 11. O-O Bc6 12. f3 a5 13. Rac1 {[%cal Ba1c1,Bc1c4,Bc4b4][%mdl 32] B36: Sicilian: Maroczy Bind: Gurgenidze System} (13. b3 Nd7 14. Rab1 Nc5 15. Rfd1 Be5 16. Qe1 Qc7 17. Nd5 Bxd5 18. cxd5 Rfc8 19. Rdc1 Qb6 20. Qd1 Bf4 21. Qd4 Bxe3+ 22. Qxe3 Na4 23. Qxb6 Nxb6 {½-½ (37) Wojtaszek,R (2701)-Lenic,L (2621) Legnica 2013}) 13... Nd7 14. Rfd1 a4 15. Nd5 {White is slightly better.} Bxd5 16. cxd5 Nc5 17. Rc4 $146 ({Predecessor:} 17. Qb4 b6 18. Bb5 Ra7 19. Rc4 Qb8 20. Qa3 Rc8 {1-0 (69) Goessler,M-Rattinger,F (2072) Graz 2011}) 17... Qb6 18. Rb4 Qa7 19. Rc1 Rfc8 20. Rbc4 Qb6 21. Qb4 (21. R1c2 {looks sharper.} Qa7 22. a3 Rab8 23. f4 b5 24. Rb4) 21... Qxb4 22. Rxb4 Bf6 23. Rc2 Kg7 24. f4 {Hoping for e5!} a3 {[#]} 25. Bg4 $2 (25. e5 $1 $16 {[%mdl 512] stays on course.} dxe5 26. Rxc5 (26. Bxc5 Ra5 $17) 26... exf4 27. Rxc8 (27. Rxf4 Rxc5 28. Bxc5 axb2 $17) 27... Rxc8 28. Bxf4 axb2 29. Kf2) 25... axb2 (25... Na6 $17 26. Rxc8 Nxb4 27. bxa3 (27. Rxa8 $2 {too greedy.} axb2 28. Kf2 b1=Q $19 {[%mdl 64] Double Attack}) 27... Rxa3 {[%mdl 64] Double Attack}) 26. e5 $11 dxe5 27. Bxc8 ({Avoid the trap} 27. Rxc5 $2 Rxc5 28. Bxc5 Rxa2 $19) (27. Bxc5 $11 {keeps the balance.} Rxa2 28. fxe5 (28. Bxc8 b1=Q+ 29. Rxb1 Rxc2 $11)) 27... Nd3 $17 28. Rbxb2 Nxb2 29. Rxb2 exf4 30. Bxb7 Bxb2 31. Bxa8 fxe3 {[%mdl 4096] Endgame KB-KB} 32. Bc6 Kf6 (32... f5 {feels hotter.} 33. Kf1 f4 34. Ke2 Kf6 35. g3 g5) 33. Be8 Ke5 ({Black should try} 33... Be5 $17 34. Kf1 Bxh2) 34. Bxf7 $11 {The position is equal.} Ke4 {[#] ( -> ...Bc3)} (34... Kd4 $5 35. Be8 $8 Bc3 $11) 35. Be8 $1 Kd3 {White must now prevent ...e2.} 36. Bb5+ Kd2 37. Kf1 {Accuracy: White = 53%, Black = 42%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.19"]
[Round "8.1"]
[White "Vaidya, Atulya"]
[Black "Niemann, Hans Moke"]
[Result "1/2-1/2"]
[ECO "E38"]
[WhiteElo "2118"]
[BlackElo "2467"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,98,12,63,32,34,34,42,39,36,0,6,-6,9,-18,0,0,0,0,6,1,23,20,37,37,41,42,53,51,50,59,57,35,47,-83,57,68,128,125,163,124,171,38,25,30,99,104,92,68,113,90,88,55,78,0,0,0,0,12,48,25,32,22,43,28,43,31,60,0,13,0,55,71,59,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Qc7 ({Black should try} 5... Na6 $11) 6. e3 {E38: Nimzo-Indian: Classical: 4...c5} (6. a3 Bxc5 7. b4 Be7 8. Nb5 Qc6 9. Nf3 d6 10. e4 Bd7 11. e5 dxe5 12. Nxe5 Qc8 13. Nxd7 Nbxd7 14. Bf4 e5 15. Be3 a5 16. Rb1 axb4 17. axb4 {0-1 (32) Lysyj,I (2642)-Kamsky,G (2664) Sochi 2019}) 6... a6 7. Bd3 Bxc5 8. Nf3 {White is slightly better.} b6 9. Ne4 $146 ({Predecessor:} 9. b3 Bb7 10. Bb2 Be7 11. O-O d6 12. Rfd1 Nbd7 13. Rac1 Nc5 {1-0 (53) Wang,A (2321)-Krush,I (2422) Saint Louis 2018}) 9... Be7 10. O-O Bb7 11. b3 d6 12. Bb2 Nbd7 {[%cal Bb8d7,Bd7e5,Be5g4][%mdl 32]} 13. Rac1 h6 14. Nfd2 Ne5 15. Nxf6+ gxf6 16. Be4 Rg8 17. f4 Ng4 18. Qd3 {[#] Black must now prevent h3.} f5 19. Bf3 Bf6 20. Ba3 Be7 $1 21. e4 {[#]} (21. Kh1 $14) 21... fxe4 (21... d5 $1 $17 {[%cal Rd5e4]} 22. Bxe7 dxe4) 22. Nxe4 $14 Rd8 (22... O-O-O $1 $14) 23. h3 Nf6 24. f5 e5 25. Rcd1 (25. Nxf6+ $18 Bxf6 26. Rcd1) 25... Bxe4 26. Bxe4 Kf8 (26... Nxe4 $11 {remains equal.} 27. Qxe4 d5 28. cxd5 Bxa3) 27. Bd5 Kg7 28. Qe3 Bf8 29. Kh1 Kh7 30. g4 b5 31. Bc1 (31. cxb5 $16 axb5 32. Bf3) 31... bxc4 $11 32. bxc4 Nxd5 33. cxd5 Qc4 34. Qa7 $36 {[%mdl 2048] White has good play.} Qe4+ 35. Kg1 Rc8 {And now ...Rc3 would win.} 36. Qxf7+ Kh8 {White should prevent ...Rc2.} 37. Qf6+ Kh7 {Threatens to win with ...Rc2.} 38. Qf7+ Kh8 {Threatening ...Rc2.} 39. Qf6+ Bg7 (39... Kh7 $11 40. Qh4 (40. Qf7+ Kh8 $16) 40... Rc2) 40. Qh4 $1 $14 Rc2 {[%csl Gc2][%cal Re4g2]} 41. Rd2 ({Better is} 41. Rf2 $14 Rxf2 42. Qxf2) 41... Rgc8 $11 {The position is equal.} 42. f6 {Threatening mate with Rxc2.} Rxc1 43. fxg7+ Kh7 {( -> ...Rxf1+)} 44. Rdf2 Rxf1+ 45. Rxf1 Qd4+ 46. Rf2 Qxd5 47. Kh2 {Hoping for g5.} e4 48. Qe7 {Qf8 is the strong threat.} Qe5+ 49. Qxe5 dxe5 {Accuracy: White = 43%, Black = 60%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.19"]
[Round "8.2"]
[White "Checa, Nicolas"]
[Black "Burke, John M"]
[Result "1/2-1/2"]
[ECO "D73"]
[WhiteElo "2506"]
[BlackElo "2562"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,60,4,18,24,29,41,45,41,10,6,6,14,18,13,6,11,0,8,0,14,20,26,23,23,20,32,17,31,13,20,13,13,5,15,12,27,4,9,6,11,0,6,0,0,-4,0,0,0,-7,0]} 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d5 5. Bg2 c6 6. cxd5 cxd5 7. Nc3 Ne4 {D73: Fianchetto Grünfeld: 5 Nf3} 8. Ne5 Nd7 9. Nxd7 Qxd7 {White is slightly better.} 10. Nxe4 dxe4 11. Bxe4 Bxd4 $146 ({Predecessor:} 11... Qxd4 12. Qxd4 Bxd4 13. O-O O-O 14. Rd1 Bg7 15. Be3 Be6 16. Bd4 Rfd8 17. Bxg7 Kxg7 18. Bxb7 Rxd1+ 19. Rxd1 Rb8 20. Bd5 Bxd5 {½-½ (20) Fridman,D (2605)-Areshchenko,A (2677) Minsk 2017}) 12. O-O O-O 13. Bf4 Rd8 14. Qb3 e5 15. Be3 Qe6 16. Rfd1 Qxb3 17. axb3 Be6 18. Bxd4 exd4 19. Rd3 Rac8 20. Rd2 Bxb3 21. Rxa7 b6 22. Kg2 Rd6 23. h4 Re8 24. Bf3 (24. Bd3 {is more complex.} Rc8 25. f3 Rc5 26. g4 Kg7 27. Ra1) 24... Re5 {The position is equal.} 25. Ra3 Rb5 26. Be4 Rb4 27. Bf3 h5 28. Rd3 Bc2 29. Rd2 Bb3 30. Rd3 Bc2 {Accuracy: White = 60%, Black = 48%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.19"]
[Round "8.3"]
[White "Jacobson, Brandon"]
[Black "Sheng, Joshua"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2456"]
[BlackElo "2449"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,84,24,21,24,18,24,18,23,33,50,17,25,28,33,42,107,108,127,83,202,56,55,0,79,102,87,104,95,21,26,25,18,24,23,15,19,17,11,14,12,13,17,8,17,7,7,0,17,8,15,5,11,0,0,4,10,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 O-O 6. Nbd2 a6 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} 7. a4 d5 8. exd5 Nxd5 9. Ne4 Be7 10. a5 $146 ({Predecessor:} 10. O-O Bg4 11. h3 Bh5 12. Re1 Kh8 13. Ng3 Bg6 {1-0 (28) Savchenko,B (2581)-Inarkiev,E (2694) Sochi 2017}) 10... b5 11. axb6 cxb6 12. O-O Nc7 {[#]} (12... Qd7 $14) 13. Nfg5 $1 $16 Qe8 14. Qh5 {[%csl Gg5][%cal Rh5h7]} h6 {[#]} (14... Bf5 $16) 15. Nf3 (15. f4 $1 $18) 15... Be6 $14 16. Nxe5 (16. Bxe6 $14 Nxe6 17. Ng3) 16... Nxe5 (16... g6 $11 {remains equal.} 17. Nxg6 fxg6 18. Bxe6+ Nxe6 19. Qxh6 a5) 17. Qxe5 $16 Bxc4 18. dxc4 Ne6 19. Nd6 (19. Re1 $16) 19... Qb8 $1 $11 20. c5 $1 Rd8 21. Qe2 Nxc5 22. Nf5 Bf8 $1 {The position is equal.} 23. Be3 Qc8 24. Qg4 {Threatens to win with b4.} Kh7 25. Qf3 b5 26. Nd4 Qb7 27. Qxb7 Nxb7 28. Nc6 Rd7 29. Rfd1 Rxd1+ 30. Rxd1 Rc8 31. Ne5 f6 32. Nd7 Be7 33. g3 Kg8 34. Kg2 Kf7 35. Nb6 Rd8 36. Ra1 a5 37. c4 bxc4 38. Nxc4 Rd5 39. Bd2 {[%cal Rd2a5]} Rd4 40. Rc1 Rd5 41. Kf1 Nd6 {aiming for ...Nxc4.} 42. Ke2 Rb5 {Accuracy: White = 44%, Black = 63%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.19"]
[Round "8.4"]
[White "Yu, Jennifer"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "2341"]
[BlackElo "2592"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,134,14,0,6,0,4,0,20,0,8,0,12,-28,-25,-28,-28,-27,-29,-39,-37,-62,-61,-34,-31,-30,-29,-30,-35,-22,-27,-41,-33,-63,-44,-49,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,-15,-19,-11,-17,-18,0,0,0,0,0,-10,-8,-10,-2,-8,-8,-87,-41,-41,-41,-41,-42,-42,-11,-11,-11,-11,-11,-11,-11,-14,-9,-9,-9,-9,-9,-9,-9,-9,0,0,0,-9,-9,-10,-10,-10,-10,-256,-254,-292,-292,-477,-474,-1116,-1113,-1069,-929,-986,-914,-866,-827,-1582,-1448,-1592,-1388,-1372,-1313,-6522,-6309,-9506,-5855,-5118,-5073]} 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Nd4 5. Bg2 Nxf3+ 6. Bxf3 Bb4 7. O-O O-O {A29: English Opening: Four Knights Variation with 4 g3} 8. d4 (8. Qb3 a5 9. Rd1 Re8 10. d3 h6 11. Bg2 Ra6 12. h3 Rae6 13. Be3 d6 14. Na4 b6 15. a3 {0-1 (30) Aronian,L (2784)-Kovalenko,I (2700) Berlin 2015}) 8... Bxc3 9. bxc3 d6 {The position is equal.} 10. a4 $146 ({Predecessor:} 10. Qb3 e4 11. Bg2 h6 12. f3 Re8 13. fxe4 Nxe4 14. Qc2 Qe7 15. Ba3 {½-½ (38) Erenberg,A (2409)-Giemsa,S (2275) Caleta 2019}) 10... e4 11. Bg2 h6 12. f3 Re8 13. g4 exf3 14. exf3 b6 15. Re1 Ba6 16. Bf1 d5 17. Rxe8+ Qxe8 18. cxd5 Bxf1 19. Qxf1 Nxd5 20. Bd2 Qd7 21. Qd3 a5 22. Kg2 Re8 23. c4 Ne7 24. Bf4 Ng6 25. Bg3 Qc6 26. Ra2 Qf6 {Played: Re8-e1} 0-1

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.19"]
[Round "8.5"]
[White "Tang, Andrew"]
[Black "Hilby, Craig"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2495"]
[BlackElo "2433"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,57,38,52,43,43,23,24,23,18,10,22,0,7,0,0,0,4,17,29,20,29,0,0,0,0,0,143,91,79,71,78,77,114,149,248,225,208,200,196,175,186,143,881,865,29992,29993,29993,647,29949,6227]} 1. d4 d6 2. Nc3 g6 3. e4 Bg7 4. Bg5 Nc6 5. Nge2 Nf6 6. f3 {B06: Modern Defence} e5 7. d5 Ne7 8. Qd2 {White has an edge.} h6 9. Be3 c6 10. Ng3 h5 11. h4 cxd5 12. exd5 $146 ({Predecessor:} 12. Bb5+ Bd7 13. Bxd7+ Qxd7 14. exd5 {0-1 (51) Stisis,Y (2391)-Nikolaidis,I (2531) Panormo 2001}) 12... O-O 13. Be2 a6 14. O-O-O b5 15. Bh6 Bb7 16. Bxg7 Kxg7 17. Qg5 Bxd5 (17... Bc8 $11 {keeps the balance.}) 18. f4 (18. Nxd5 $142 Nexd5 19. Rd2) 18... exf4 $16 19. Nxh5+ Nxh5 20. Bxh5 Bb7 21. Qxf4 Nc8 (21... Nf5 $16 {was necessary.}) 22. Bf3 Bxf3 23. Qxf3 (23. gxf3 $6 Qf6 $16) 23... Nb6 24. Ne4 Qe7 25. h5 $36 {[%mdl 2048] Hoping for hxg6. White is in control.} ({Much less strong is} 25. Rxd6 $6 Nc4 $16) ({Don't take} 25. Nxd6 Rad8) 25... d5 $2 {[%mdl 8192]} (25... Nc4 $16 26. b3 f5) 26. hxg6 $18 {Intending Rh7+ and mate.} Qxe4 27. Rh7+ Kxg6 {[#]} 28. Qg3+ (28. Rh6+ $142 $1 {[%mdl 512]} Kxh6 29. Qf6+ Kh5 {[#]} 30. g4+ $1 {[%mdl 576] Decoy} Kxg4 31. Rg1+ Qg2 32. Rxg2+ Kh3 33. Qf3+ Kh4 34. Qg4#) 28... Kf6 29. Qd6+ {[%mdl 64] Double Attack. Accuracy: White = 56%, Black = 52%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.20"]
[Round "9.1"]
[White "Hilby, Craig"]
[Black "Vaidya, Atulya"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2433"]
[BlackElo "2118"]
[Annotator "NA"]
[PlyCount "71"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 3. e5 {[%emt 0:00:00]} Bf5 {[%emt 0:00:00]} 4. h4 {[%emt 0:00:00]} h5 {[%emt 0:00:00]} 5. Bd3 {[%emt 0:00:05]} Bxd3 {[%emt 0:01:44]} 6. Qxd3 {[%emt 0:00:34]} e6 {[%emt 0:00:05]} 7. Bg5 {[%emt 0:00:10]} Be7 {[%emt 0:03:29]} 8. Nf3 {[%emt 0:02:04]} Bxg5 {[%emt 0:00:40]} 9. hxg5 {[%emt 0:01:26]} Qb6 {[%emt 0:05:18]} 10. Nc3 {[%emt 0:06:17]} Ne7 {[%emt 0:05:33]} 11. O-O-O {[%emt 0:04:17]} Na6 {[%emt 0:08:56]} 12. g4 {[%emt 0:02:04]} Qa5 {[%emt 0:03:39]} 13. Rxh5 {[%emt 0:02:55]} Rf8 {[%emt 0:01:33]} 14. Kb1 {[%emt 0:01:37]} b5 {[%emt 0:03:18]} 15. Nd2 {[%emt 0:04:22]} Qb6 {[%emt 0:05:39]} 16. Nb3 {[%emt 0:01:32]} Nb4 {[%emt 0:12:23]} 17. Qe3 {[%emt 0:02:39]} a5 {[%emt 0:00:29]} 18. Nc5 {[%emt 0:01:47]} Na6 {[%emt 0:02:46]} 19. Nxa6 {[%emt 0:05:36]} Qxa6 {[%emt 0:03:48]} 20. Rdh1 {[%emt 0:02:05]} Kd7 {[%emt 0:01:13]} 21. Rh7 {[%emt 0:01:26]} Rg8 {[%emt 0:00:16]} 22. Ne2 {[%emt 0:00:33]} b4 {[%emt 0:07:23]} 23. Nc1 {[%emt 0:02:08]} c5 {[%emt 0:02:31]} 24. dxc5 {[%emt 0:04:37]} Qc4 {[%emt 0:00:40]} 25. Nd3 {[%emt 0:05:56]} a4 {[%emt 0:01:54]} 26. Qf4 {[%emt 0:03:43]} b3 {[%emt 0:00:07]} 27. Qxc4 {[%emt 0:03:41]} dxc4 {[%emt 0:00:10]} 28. Nf4 {[%emt 0:00:34]} Rgb8 {[%emt 0:02:33]} 29. a3 {[%emt 0:04:48]} bxc2+ {[%emt 0:01:54]} 30. Kxc2 {[%emt 0:00:10]} Rb5 {[%emt 0:00:04]} 31. Rd1+ {[%emt 0:02:29]} Nd5 {[%emt 0:01:23]} 32. Nxd5 {[%emt 0:02:20]} exd5 {[%emt 0:00:06]} 33. Rxg7 {[%emt 0:00:31]} Rab8 {[%emt 0:00:29]} 34. Rxd5+ {[%emt 0:03:52]} Ke6 {[%emt 0:00:17]} 35. Rd6+ {[%emt 0:00:22]} Kxe5 {[%emt 0:00:08]} 36. Rb6 {[%emt 0:00:14]} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.20"]
[Round "9.2"]
[White "Liang, Awonder"]
[Black "Tang, Andrew"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "2592"]
[BlackElo "2495"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,77,5,45,9,40,33,36,36,36,26,14,26,13,4,27,21,29,34,25,6,8,0,8,-33,-35,-38,-39,-40,-38,-51,-45,-55,-59,-76,-72,-57,-61,-62,-43,-66,-66,-97,-97,-95,-103,-185,-106,-181,-208,-222,-177,-254,-243,-258,-259,-257,-248,-333,-280,-260,-268,-292,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. d4 $146 ({Predecessor:} 4. c3 Bg7 5. d4 exd4 6. cxd4 a6 {0-1 (64) Sevian,S (2647)-Dreev,A (2670) chess.com INT 2019}) 4... exd4 5. c3 a6 6. Ba4 {C60: Ruy Lopez: Unusual Black 3rd moves and 3...g6} (6. Bxc6 $5 dxc6 7. cxd4 $11) 6... Bg7 7. cxd4 b5 8. Bc2 {White is slightly better.} d6 9. h3 Nf6 10. O-O O-O 11. Nc3 Bb7 12. Re1 Re8 13. Bg5 {Hoping for e5.} h6 14. Bd2 Na5 15. Qc1 Kh7 16. b3 b4 17. Na4 Bxe4 18. Bxe4 Nxe4 19. Bxb4 c5 $1 {[%cal Rc5b4]} 20. Bxa5 Qxa5 21. Qc4 Nd2 22. Nxd2 Qxd2 {[%mdl 64] Double Attack} 23. Red1 Qf4 {[%cal Rg7d4]} 24. Rd3 Ra7 {[%cal Rg7d4]} 25. Rf1 cxd4 26. Nb6 Qf5 27. Rdd1 {[#]} (27. Rf3 $17 Qb5 28. Qxb5 axb5 29. Nd5) 27... Qc5 (27... Rb8 $1 $19 {[%cal Rb8b6]} 28. Na4 Rc8) 28. Qa4 (28. Qxc5 $17 {was necessary.} dxc5 29. Rfe1) 28... Re2 $19 29. Nc4 d5 $36 {[%mdl 2048] Black has strong initiative.} 30. Nd2 (30. Na5 {was called for.}) 30... Qc2 31. Nf3 {[#]} Rxf2 $1 {[%mdl 576] Deflection} 32. Rxf2 Qxd1+ 33. Kh2 Qc1 34. Qa5 Qf4+ 35. Kg1 Rc7 $2 ({Black should try} 35... Qe3 $19 {...f5 is the strong threat.} 36. Qd2 Rc7) 36. Ng5+ $1 $11 {The position is equal.} Qxg5 37. Qxc7 d3 {Threatens to win with ...d2.} 38. Rxf7 Qe3+ 39. Kf1 {Accuracy: White = 53%, Black = 76%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.20"]
[Round "9.3"]
[White "Sheng, Joshua"]
[Black "Yu, Jennifer"]
[Result "1-0"]
[ECO "C24"]
[WhiteElo "2449"]
[BlackElo "2341"]
[Annotator "ChessBase"]
[PlyCount "83"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 {[%emt 0:00:00]} e5 {[%emt 0:00:00]} 2. Bc4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:20]} 3. d3 {[%emt 0:00:00]} c6 {[%emt 0:01:32]} 4. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:07]} 5. Bb3 {[%emt 0:00:00]} a5 {[%emt 0:07:05]} 6. a4 {[%emt 0:00:05]} Bd6 {[%emt 0:01:02]} 7. exd5 {[%emt 0:03:40]} Nxd5 {[%emt 0:00:13]} 8. O-O {[%emt 0:00:24]} O-O {[%emt 0:00:10]} 9. Re1 {[%emt 0:00:24]} Nd7 {[%emt 0:09:14]} 10. Bg5 {[%emt 0:19:50]} Qc7 {[%emt 0:12:45]} 11. Na3 {[%emt 0:02:53]} Bxa3 {[%emt 0:06:47]} 12. Rxa3 {[%emt 0:00:09]} f6 {[%emt 0:06:02]} 13. Bh4 {[%emt 0:01:01]} N7b6 {[%emt 0:08:24]} 14. d4 {[%emt 0:08:42]} Bg4 {[%emt 0:00:18]} 15. dxe5 {[%emt 0:04:45]} fxe5 {[%emt 0:00:15]} 16. Ba2 {[%emt 0:00:23]} Kh8 {[%emt 0:09:35]} 17. h3 {[%emt 0:04:40]} Bxf3 {[%emt 0:02:52]} 18. Rxf3 {[%emt 0:00:05]} Nxa4 {[%emt 0:03:05]} 19. Rxf8+ {[%emt 0:02:57]} Rxf8 {[%emt 0:00:08]} 20. c4 {[%emt 0:00:40]} Nxb2 {[%emt 0:09:59]} 21. Qc2 {[%emt 0:02:32]} Nxc4 {[%emt 0:01:20]} 22. Bxc4 {[%emt 0:00:31]} Nf4 {[%emt 0:02:48]} 23. Bg3 {[%emt 0:02:16]} Qd6 {[%emt 0:03:49]} 24. Ba2 {[%emt 0:13:17]} b5 {[%emt 0:02:31]} 25. Bb1 {[%emt 0:03:13]} g6 {[%emt 0:00:07]} 26. Qc3 {[%emt 0:00:59]} b4 {[%emt 0:01:47]} 27. Qa1 {[%emt 0:03:21]} Qd5 {[%emt 0:02:13]} 28. Be4 {[%emt 0:02:39]} Qb5 {[%emt 0:01:29]} 29. Bxc6 {[%emt 0:11:31]} Qxc6 {[%emt 0:00:06]} 30. Qxe5+ {[%emt 0:00:06]} Qf6 {[%emt 0:00:28]} 31. Bxf4 {[%emt 0:00:04]} Qxe5 {[%emt 0:00:09]} 32. Bxe5+ {[%emt 0:00:04]} Kg8 {[%emt 0:00:01]} 33. Rc1 {[%emt 0:04:58]} b3 {[%emt 0:03:07]} 34. Rc7 {[%emt 0:04:11]} Re8 {[%emt 0:01:05]} 35. f4 {[%emt 0:01:17]} a4 {[%emt 0:00:03]} 36. Rg7+ {[%emt 0:00:37]} Kf8 {[%emt 0:00:08]} 37. Rb7 {[%emt 0:00:07]} Rc8 {[%emt 0:02:52]} 38. Rxh7 {[%emt 0:01:49]} Rc1+ {[%emt 0:00:10]} 39. Kh2 {[%emt 0:00:01]} a3 {[%emt 0:01:14]} 40. Bd6+ {[%emt 0:00:00]} Kg8 {[%emt 0:00:00]} 41. Bxa3 {[%emt 0:01:55]} Ra1 {[%emt 0:03:30]} 42. Rg7+ {[%emt 0:00:17]} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.20"]
[Round "9.4"]
[White "Burke, John M"]
[Black "Jacobson, Brandon"]
[Result "1/2-1/2"]
[ECO "B00"]
[WhiteElo "2562"]
[BlackElo "2456"]
[Annotator "TA"]
[PlyCount "132"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,132,-2,-5,0,0,0,-4,-25,0,-45,-27,-37,-11,-21,-26,-29,-38,-39,0,-7,-7,-2,-9,0,-7,-39,-39,-45,-63,-86,-90,-106,-100,-103,-58,-68,-78,-135,-148,-139,-87,-75,-25,-143,-138,-140,-156,-123,-147,-245,-245,-253,-245,-212,-192,-208,-129,-183,0,-129,-120,-131,-106,-106,0,-120,-135,-133,-132,-138,0,0,0,-138,-143,-137,-106,-122,-113,-112,-111,-159,-50,-54,-54,-47,-47,-52,-41,-52,-9,-9,0,0,0,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,0,-67,-67,-71,-71,-71,-71,-72,-8,-21,-8,-8,-8,-8,0,0,0]} 1. e4 h6 2. h4 $146 ({Predecessor:} 2. d4 a6 3. c4 c5 4. d5 d6 5. Nc3 g5 6. Nge2 Bg7 7. Ng3 Nd7 8. h4 gxh4 9. Nh5 Bxc3+ 10. bxc3 Qa5 11. Rxh4 {1-0 (40) Howell,D (2689)-Basman,M (2313) Harrow 2018}) 2... d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Qf3 Qd5 6. Nd6+ {B00: Queen's Fianchetto Defence, Nimzowitsch Defence} Qxd6 7. Qxf5 Nc6 8. Rh3 Nf6 9. Bb5 e6 10. Qd3 a6 (10... Nd5 {seems wilder.} 11. Qc4 Be7 12. d4 O-O 13. Bxc6 bxc6 14. Kf1 Rae8) 11. Qxd6 cxd6 12. Ba4 b5 13. Bb3 Nd4 14. a4 b4 $1 $36 {[%mdl 2048] next ...Rc8 is good for Black. Black fights for an advantage.} 15. a5 Nxb3 16. Rxb3 d5 17. c3 Rb8 18. d4 Bd6 19. Ne2 Kd7 20. Bf4 bxc3 $1 21. Rxc3 Bb4 {Hoping for ...Rb5.} (21... Rxb2 $6 22. Bxd6 Kxd6 23. Rac1 $15) 22. Bxb8 Rxb8 23. Kd1 (23. f3 $142) 23... Bxc3 $17 24. bxc3 {[%mdl 4096] Endgame KRN-KRN} Ne4 ({Black should try} 24... Rb2 25. f3 Ne8) 25. Kc2 Rb5 26. f3 (26. g4 $11) 26... Nd6 27. Nf4 Nc4 28. Nd3 Kc7 (28... Nxa5 $6 29. h5 $11) (28... Rxa5 $6 29. Nc5+ Ke7 30. Rxa5 $11) 29. Nc5 (29. g4 $17) 29... Rb2+ $19 ({And not} 29... Nxa5 30. Nxa6+ Kd6 31. Nc5 $11) ({Weaker is} 29... Rxa5 30. Rxa5 Nxa5 31. Nxa6+ Kd7 32. Kd3 $11) 30. Kc1 Rxg2 31. Nxa6+ Kc6 {Strongly threatening ...Rg1+.} 32. Ra4 Rg1+ 33. Kc2 Rg2+ (33... g5 $19 34. hxg5 Rg2+ 35. Kb1 h5) 34. Kc1 $17 Kb5 35. Nc5 Rg1+ 36. Kc2 Rg2+ 37. Kc1 Nxa5 38. Rb4+ Kc6 39. Ra4 Kb5 {Threatens to win with ...Nb3+!} 40. Rb4+ Kc6 41. Ra4 Nb7 42. Nd3 Kc7 43. Ne5 f6 44. Nd3 Rg3 $1 45. Nf4 g5 ({Much less strong is} 45... Rxf3 46. Nxe6+ Kb6 47. Nxg7 $17) (45... Nd8 $17 46. Nh5 Rxf3 47. Ra7+ Kb6) 46. hxg5 $15 hxg5 47. Nxe6+ Kd7 48. Ra6 Rxf3 {White must now prevent ...g4.} 49. Kd2 g4 50. Ke2 $1 f5 51. Nf8+ Kc7 52. Ng6 Rxc3 {Black wants to play ...Nd6.} 53. Ne7 Rf3 {aiming for ...Nd6.} 54. Nxd5+ Kd7 55. Nf6+ $1 Ke7 {And now ...Nd6 would win.} 56. Nd5+ Kf7 57. Ne3 Nd8 58. d5 Rf4 59. Ra8 ({White should play} 59. Rd6 $11) 59... Ke7 60. d6+ Kd7 61. Nd5 {[#]} Re4+ $1 62. Kf2 {[#] Nf6+ is the strong threat.} Re6 (62... Ke6 $1 $17 {[%cal Re6d5]} 63. Ne3 Rf4+ 64. Kg2 Nf7) 63. Ne3 {The position is equal.} Rxd6 64. Ra5 Rd2+ 65. Ke1 Rb2 66. Rxf5 g3 {Accuracy: White = 59%, Black = 50%.} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.20"]
[Round "9.5"]
[White "Niemann, Hans Moke"]
[Black "Checa, Nicolas"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2467"]
[BlackElo "2506"]
[Annotator "ChessBase"]
[PlyCount "60"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. Nf3 {[%emt 0:01:13]} d5 {[%emt 0:00:00]} 2. e3 {[%emt 0:00:11]} Nf6 {[%emt 0:02:20]} 3. c4 {[%emt 0:00:17]} c6 {[%emt 0:02:33]} 4. Nc3 {[%emt 0:00:25]} a6 {[%emt 0:00:16]} 5. d4 {[%emt 0:02:01]} b5 {[%emt 0:03:58]} 6. cxd5 {[%emt 0:03:19]} cxd5 {[%emt 0:00:15]} 7. Bd3 {[%emt 0:01:31]} e6 {[%emt 0:05:40]} 8. a4 {[%emt 0:07:49]} b4 {[%emt 0:00:45]} 9. Ne2 {[%emt 0:00:55]} Nc6 {[%emt 0:02:41]} 10. b3 {[%emt 0:00:45]} Bd6 {[%emt 0:05:41]} 11. Bb2 {[%emt 0:00:25]} Bb7 {[%emt 0:00:07]} 12. O-O {[%emt 0:03:37]} O-O {[%emt 0:02:42]} 13. Ng3 {[%emt 0:04:00]} a5 {[%emt 0:04:39]} 14. Rc1 {[%emt 0:04:44]} Ne7 {[%emt 0:00:36]} 15. Ne5 {[%emt 0:01:17]} Ba6 {[%emt 0:01:26]} 16. Bxa6 {[%emt 0:01:50]} Rxa6 {[%emt 0:00:13]} 17. Qd3 {[%emt 0:00:16]} Ra8 {[%emt 0:08:10]} 18. Qb5 {[%emt 0:03:52]} Rb8 {[%emt 0:10:49]} 19. Qa6 {[%emt 0:00:11]} Ra8 {[%emt 0:00:06]} 20. Qb5 {[%emt 0:00:05]} Rb8 {[%emt 0:03:33]} 21. Qa6 {[%emt 0:00:03]} Qb6 {[%emt 0:00:05]} 22. Qxb6 {[%emt 0:00:16]} Rxb6 {[%emt 0:00:31]} 23. Rc2 {[%emt 0:00:06]} Rc8 {[%emt 0:00:04]} 24. Rxc8+ {[%emt 0:00:11]} Nxc8 {[%emt 0:00:03]} 25. Rc1 {[%emt 0:00:05]} Ne7 {[%emt 0:00:03]} 26. Nd3 {[%emt 0:00:23]} Kf8 {[%emt 0:06:17]} 27. f3 {[%emt 0:04:34]} Ke8 {[%emt 0:06:25]} 28. Kf2 {[%emt 0:00:23]} h5 {[%emt 0:03:19]} 29. Nf1 {[%emt 0:01:34]} Rc6 {[%emt 0:05:03]} 30. Rxc6 {[%emt 0:00:54]} Nxc6 {[%emt 0:00:04]} 1/2-1/2

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.20"]
[Round "10.1"]
[White "Liang, Awonder"]
[Black "Checa, Nicolas"]
[Result "1-0"]
[ECO "C16"]
[WhiteElo "2592"]
[BlackElo "2506"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,65,52,29,53,36,47,39,69,66,72,-26,-23,-32,66,51,87,88,92,0,-4,-20,6,0,82,72,83,88,80,78,81,84,78,81,63,41,61,37,55,0,25,0,0,0,136,177,153,0,400,394,453,460,445,445,387,362,663,663]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. h4 h6 {C16: French: 3 Nc3 Bb4 4 e5: Lines without ...c5} (6... Ba6 7. Bxa6 Nxa6 8. a3 Qd7 9. h5 c5 10. Nf3 h6 11. Qf4 Ne7 12. Be3 Nf5 13. g4 Nxd4 14. Nxd4 cxd4 15. Bxd4 {½-½ (60) Mozharov,M (2566)-Istratescu,A (2677) Basel 2014}) 7. Nf3 Ne7 8. b4 $146 ({Predecessor:} 8. h5 Qd7 9. Bd2 Ba6 10. Rh3 c5 11. Bxa6 Nxa6 12. Ne2 Nc6 13. a3 O-O-O 14. dxc5 Nxc5 {1-0 (57) Dueckstein,A (2330)-Staudner,O (2340) Vienna 1997}) 8... c5 {White is slightly better.} 9. bxc5 bxc5 10. Bb5+ (10. dxc5 $16 a6 11. Rb1) 10... Bd7 $1 $11 {[%cal Rd7b5] aiming for ...Bxb5.} 11. O-O Nf5 (11... cxd4 $15 12. Nxd4 a6) 12. Bd3 $1 $14 Nxd4 13. Nxd4 cxd4 {[#]} 14. Ne2 ({White has to play} 14. Nb5 $1 $16) 14... Nc6 $11 15. Qg3 Qc7 16. Bf4 Nb4 (16... Rb8 $11) 17. Nxd4 $16 Nxd3 18. cxd3 g6 19. Rfc1 Qd8 20. h5 gxh5 21. Be3 h4 22. Qg4 {[%mdl 1024] White has compensation.} h5 $1 {[%cal Rh5g4]} 23. Qh3 Rg8 24. a4 ({Better is} 24. Qf3 $14) 24... Rg4 25. Nb5 $36 {[%mdl 2048] White has some pressure.} Bxb5 $1 26. axb5 Be7 (26... d4 $11 {remains equal.} 27. Qf3 dxe3 28. Qc6+ Ke7 29. Qb7+ Ke8 30. Qc6+ Ke7 31. Qb7+ Ke8 32. Qc6+ Ke7) 27. Bxa7 Bg5 28. Be3 $2 (28. Rc2 $16) 28... Rxa1 $4 {[%mdl 8192]} (28... Rg3 $1 $11 29. Bxg5 Rxg5 30. Rxa8 Qxa8) 29. Rxa1 $18 Rb4 30. Qf3 Bxe3 31. Qxe3 {Threatens to win with Qh6.} ({Less strong is} 31. fxe3 Qg5 $16) 31... Rxb5 32. Qh6 {Ra7 would kill now.} Rb7 $2 {[#]} (32... Rc5 33. Qxh5 Ke7 34. Ra7+ Rc7) 33. Ra8 $1 {[%mdl 512] Accuracy: White = 67%, Black = 37%.} 1-0

[Event "USA-ch Juniors Open 2019"]
[Site "Saint Louis"]
[Date "2019.07.20"]
[Round "11.1"]
[White "Checa, Nicolas"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "D41"]
[WhiteElo "2506"]
[BlackElo "2592"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2019.07.09"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,114,18,0,0,-12,16,-7,0,-24,0,-4,0,-49,-37,-68,-52,-70,-69,-58,-41,-34,-10,-17,0,0,0,0,33,0,35,14,10,15,38,6,6,6,6,8,6,0,0,0,0,0,0,-131,0,-133,-139,-131,-124,-96,-108,-115,-135,-135,-112,-337,-351,-415,-111,-207,0,-353,0,-200,-200,-220,-200,-214,0,-197,-199,-156,0,-202,-205,-155,-50,-506,-513,-541,-530,-473,-414,-419,-419,-415,29989,0,0,-29995,-29996,-29998,-29999]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bd3 Nc6 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5} 12. Qc3 (12. Bc2 b6 13. O-O Bb7 14. d5 Na5 15. dxe6 fxe6 16. Qe2 Rc8 17. Rad1 Qc7 18. Nd4 Qe5 19. Rfe1 {½-½ (37) Wojtaszek,R (2737)-Kramnik,V (2794) Antalya 2017}) 12... Qd6 13. Rd1 Rd8 {[%cal Rc6d4] [#] The position is equal.} 14. Bc4 $146 ({Predecessor:} 14. O-O Qb4 15. Qxb4 Nxb4 16. Bc4 b5 17. Bxb5 Nxa2 18. Ra1 Nc3 19. Bc6 {½-½ (30) Sanikidze,T (2600)-Kryvoruchko,Y (2612) Novi Sad 2009}) 14... Bd7 15. O-O Qb4 16. Qc2 Na5 17. Bb3 Rac8 18. Qb1 Nxb3 19. axb3 Be8 20. d5 h6 21. Rd4 Qd6 22. e5 Qb6 23. d6 Bc6 {White must now prevent ...Bxf3.} (23... Rc3 $5 {[%cal Rc3f3]} 24. Qe4 Bb5 $11) 24. Rfd1 Bd5 25. Rxd5 exd5 26. Nd4 Rc3 27. Qb2 Qb4 {aiming for ...Rd3!} 28. h3 a5 {And now ...a4 would win.} 29. Qe2 a4 30. bxa4 Qxa4 31. Rd2 Rc1+ 32. Kh2 Qa1 33. Rd3 (33. Qg4 $11) 33... Rh1+ $17 34. Kg3 Re1 35. Qh5 Re4 36. Nf3 Qc1 {[%csl Ge4][%cal Rc1f4]} 37. Qf5 Qc4 38. Ra3 Qc8 39. Qh5 $2 (39. Qxc8 $17 {was forced.} Rxc8 40. Rb3) 39... Qe6 $19 ({Much less strong is} 39... Qc1 40. Re3 $1 $19 {[%mdl 512]}) 40. Rb3 {[#]} Qd7 $2 (40... Rxd6 $1 $19 {[%mdl 512] is more deadly.} 41. Rxb7 (41. exd6 Qxd6+) 41... g5 42. Rxf7 Qxf7 43. Qxf7+ Kxf7 44. exd6 Ke6) 41. Rd3 (41. Nd2 $17 Ra4 42. f4) 41... Qe6 (41... Qc6 $142 42. Kh2 Qc4) 42. Rb3 $1 {[#]} Qd7 $2 (42... Rxd6 $1 $19 {[%mdl 512] ...Rb6 is the strong threat.} 43. Rxb7 (43. exd6 Qxd6+) 43... Rd8) 43. Rc3 $2 (43. Rd3 $1 $11) 43... Rc8 44. Rd3 Qe6 $1 45. Rb3 Qd7 $2 (45... Rb8 $19 46. Rb5 f6) 46. Kh2 $2 (46. Rd3 $11 {and White is okay.}) 46... Re8 47. Rc3 Rc8 $2 (47... d4 $17 48. Rb3 b5) 48. Rd3 $2 (48. Rb3 $1 $11 {and White stays safe.}) 48... Qe6 49. g4 f6 (49... Rd8 $17 50. Qf5 g6 51. Qxe6 fxe6) 50. Rb3 $2 {[%mdl 8192]} (50. exf6 $15 Qxd6+ 51. Kg2) 50... fxe5 51. Rxb7 {Threatens to win with Re7.} Rf8 52. d7 Qf6 {( -> ...Qf4+)} 53. g5 Qf4+ 54. Kg2 Re2 $4 {[%mdl 8192] [#]} (54... Qf5 $19 55. Rb2 Rf4) 55. gxh6 $2 (55. d8=Q $1 {[%mdl 512] mates} Ra2 (55... Rxd8 56. Qg6) 56. Qxd5+ Kh8 57. Qg6 Rxf2+ 58. Kxf2 Qh2+ 59. Ke3 $1 {[%mdl 512]} Rxf3+ 60. Qxf3) 55... Qe3 {[#]} ({But not} 55... Qxh6 $2 56. Qxh6 gxh6 57. Rc7 $16) (55... e4 $5 56. Rb3 $8 (56. Qxd5+ $2 Kh7 $19) 56... exf3+ 57. Rxf3 Rxf2+ 58. Kxf2 Qd4+ 59. Kg3 Qg1+ 60. Kh4 Qe1+ 61. Kg4 Qb4+ 62. Kg3 Qd6+ 63. Kg2 Rxf3 64. Qxf3 Qxd7 $11) 56. Qh4 $2 {[%mdl 8192]} (56. Qf7+ $1 $11 {[%mdl 512]} Rxf7 57. d8=Q+ {[%mdl 64] Double Attack} Kh7 58. Ng5+ Qxg5+ 59. Qxg5 Rxb7 60. Kf1) 56... Qxf3+ 0-1

