[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.13"]
[Round "1.1"]
[White "Lenderman, Aleksandr"]
[Black "Hess, Robert"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2624"]
[BlackElo "2591"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]

{[%evp 9,111,0,0,3,18,22,30,23,9,9,24,-12,-12,-19,-12,-8,-7,-25,-17,-11,-8,-8,-2,-16,0,0,-3,-3,0,-9,0,-10,0,-14,0,-41,-37,-41,-8,-14,-12,-47,-10,0,16,0,0,-9,0,0,0,0,0,0,0,0,0,0,0,-31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,172,171,167,159,158,168,179,179,179,178,166,172,166,0,160,0,220,0]} 1. c4 b6 2. d4 Bb7 3. Nf3 e6 4. g3 Bb4+ 5. Nbd2 Bxf3 6. exf3 {A40: Unusual replies to 1 d4.} Ne7 7. a3 Bxd2+ 8. Bxd2 {[#] White has an edge.} (8. Kxd2 d5 $15) 8... O-O $146 ({Predecessor:} 8... d5 9. b3 O-O 10. Bg2 dxc4 11. bxc4 Qxd4 12. O-O Nbc6 13. Qc2 Qf6 14. f4 Nd4 {0-1 (26) Romanov,E (2619)-Morozevich,A (2683) Sochi 2016}) 9. Bd3 Nbc6 10. Bc3 d5 11. O-O dxc4 12. Bxc4 Qd6 13. Qd3 Rad8 14. Rad1 Nd5 15. Bd2 Nce7 16. Rfe1 Rd7 17. Bb5 c6 18. Ba4 Rfd8 19. Bc2 Nf6 20. Qe2 Qd5 (20... Qxd4 $2 21. Bb4 $18) 21. Bf4 Qh5 22. Be5 (22. h4 {feels hotter.} Qb5 23. Bd3 Qa4 24. Be5 Nf5 25. Bc2) 22... Nfd5 23. Bb3 Ng6 24. Rc1 Nde7 25. Ba4 Nxe5 26. dxe5 h6 27. Bc2 c5 28. Kg2 Nf5 29. g4 Qg5 30. f4 Nh4+ 31. Kg3 Qe7 32. Rcd1 Ng6 33. Bxg6 fxg6 34. Qc2 Kf7 35. h4 Rd4 36. Rxd4 Rxd4 $11 {[%mdl 4096] Endgame KQR-KQR} 37. Rd1 Qd7 38. Rxd4 cxd4 {KQ-KQ} 39. Qd3 Qd5 40. f3 g5 41. hxg5 hxg5 42. fxg5 Qxe5+ {[%mdl 64] Double Attack} 43. f4 Qd5 44. Kf2 b5 45. Qf3 {aiming for Qxd5.} Qc5 46. Qb7+ Kf8 47. Kf3 {Black must now prevent g6.} g6 $2 (47... Qc4 $1 $11 {and Black stays safe.}) 48. Qd7 $1 $18 {[%cal Rd7e6]} Qc4 49. Qd8+ (49. Qxa7 Qf1+ 50. Kg3 Qg1+ 51. Kh3 Qf1+ 52. Kg3 Qg1+ 53. Kh3 Qf1+ 54. Kh4 Qf2+ 55. Kh3 Qxb2 $11) 49... Kf7 50. Qf6+ Ke8 51. Qxg6+ Kd7 52. Qf7+ Kd6 53. Qf8+ ({Worse is} 53. Qxa7 Qd3+ 54. Kg2 Qe4+ 55. Kh3 Qh1+ 56. Kg3 Qe1+ 57. Kh3 Qh1+ 58. Kg3 Qe1+ 59. Kh3 Qh1+ $11) 53... Kd7 54. Qf7+ Kd6 {[#]} 55. Qf8+ ({Not} 55. Qxa7 Qd3+ 56. Kf2 Qe3+ 57. Kg2 Qe4+ 58. Kh3 Qf3+ 59. Kh4 Qh1+ 60. Kg3 Qe1+ 61. Kf3 Qe3+ 62. Kg2 Qe4+ 63. Kh3 Qh1+ 64. Kg3 Qe1+ 65. Kg2 Qe2+ 66. Kh3 Qf3+ 67. Kh4 Qh1+ 68. Kg3 $11) (55. Kg3 $1 $16 {And now g6 would win.} Qe2 56. g6 Qe1+ 57. Kg2 Qe4+ 58. Kh2) 55... Kd7 $1 {[#]} 56. Qf7+ $2 {Weighted Error Value: White=0.13/Black=0.08} ({Only move:} 56. Kg3 $1 $18 d3 57. Qf7+ Kd6 58. Qe8 (58. Qxa7 $2 d2 $19)) 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.13"]
[Round "1.2"]
[White "Gareyev, Timur"]
[Black "Moradiabadi, Elshan"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2606"]
[BlackElo "2555"]
[Annotator "TA"]
[PlyCount "42"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]

{[%evp 9,42,0,0,0,0,0,0,-16,-24,-18,-10,-35,-30,-30,-24,-50,-12,-31,-12,-7,-4,-34,-35,-84,-83,-88,-85,-77,0,0,0,0,0,0,0]} 1. c3 d5 2. Nf3 c5 3. d4 e6 4. Bf4 Bd6 5. Bg3 Nf6 6. e3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} O-O 7. Nbd2 Qc7 8. Ne5 Nbd7 {[%cal Rd7e5]} 9. f4 Ne4 10. Bd3 Nxd2 11. Qxd2 Nf6 12. O-O b6 {[#]} (12... c4 $5 {[%cal Rc4d3]} 13. Bc2 Ne4 14. Bxe4 dxe4 $15) 13. Rad1 $146 ({Predecessor:} 13. Qe2 Ne4 14. Bh4 f6 15. Ng4 Bb7 16. Rad1 c4 17. Bb1 b5 18. Be1 a5 19. a3 {½-½ (31) Fragiadakis,E (1743)-Lirindzakis,T (2157) Heraklion 2019}) 13... cxd4 14. cxd4 Ne4 15. Bxe4 dxe4 16. d5 Ba6 17. Rc1 {[#]} Qb7 $1 18. Rfd1 Bxe5 (18... Qxd5 $17 19. Qxd5 exd5) 19. fxe5 $11 {The position is equal.} Qxd5 20. Qxd5 exd5 21. Rxd5 Rac8 {Weighted Error Value: White=0.15/Black=0.10} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.13"]
[Round "1.3"]
[White "Yoo, Christopher Woojin"]
[Black "Tang, Andrew"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "2455"]
[BlackElo "2538"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]

{[%evp 13,101,4,14,6,16,8,9,6,50,48,28,38,43,25,60,58,52,44,65,60,70,31,30,34,24,0,0,0,10,2,35,29,44,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,-4,-10,-7,0,0,569,565,551,547,539,501,1170,1122,972,842,835,828,810,793,1115,737,29973,29970,29994,29995,29995,29996,29996,29997,29997,29998]} 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bf4 O-O 6. e3 b6 7. cxd5 Nxd5 8. Nxd5 {D37: Queen's Gambit Declined: 5 Bf4.} Qxd5 9. Bxc7 {9.Be2 gains popularity.} Qa5+ 10. Nd2 $1 {The position is equal.} Ba6 11. Bxb8 {[#] aiming for Bxa6.} Bxf1 $146 ({Predecessor:} 11... Raxb8 12. a3 Bxf1 13. Kxf1 Rfc8 14. Nf3 Qb5+ 15. Qe2 Qxe2+ 16. Kxe2 Rc2+ 17. Nd2 Rxb2 {1-0 (65) Sarana,A (2654)-Sevian,S (2660) chess.com INT 2020}) 12. Kxf1 Raxb8 13. Nf3 Rbc8 14. Qd3 Rc7 15. Ke2 Qb4 16. Rab1 Qa4 17. a3 Rc2+ 18. Kf1 Qc6 19. Ne1 (19. Ne5 {with more complications.} Qc8 20. g3 Bd6 21. Nf3 Rxb2 22. Rxb2 Qc1+ 23. Kg2) 19... Rc4 20. Rd1 Rc8 21. Qe2 e5 22. dxe5 Qe4 23. Rd4 Rxd4 24. exd4 Qxd4 25. g3 Qd5 {[%cal Rd5h1]} 26. Nf3 g5 {...g4 is the strong threat.} 27. h3 h5 {And now ...Rc1+ would win.} 28. g4 hxg4 29. hxg4 Rc1+ 30. Kg2 Rc4 31. Kg3 Qe6 32. Nd2 Rc5 33. Nf3 {Black must now prevent Qe4.} Rc4 34. Ne1 Qd5 35. f3 $40 {[%mdl 128] Black needs to defend precisely.} Rd4 36. Rh2 Rd1 37. Qe3 Qc4 38. Re2 Bc5 $2 {[%mdl 8192]} (38... a5 $11 {and Black is okay.}) 39. Qxg5+ $18 Kf8 40. Rh2 {[%cal Rh2h8]} Ke8 41. Ng2 Rf1 (41... Bf8 $142 42. Rh8 Qc5) 42. Rh8+ Bf8 {[#]} 43. e6 $1 Qxe6 44. Qb5+ Ke7 45. Qb4+ Kd7 46. Qxf8 {Strongly threatening Qc8+.} Qe5+ 47. f4 {White mates.} Qxb2 48. Qc8+ Kd6 49. Rd8+ Ke7 50. Rd7+ {[%mdl 64] [#] Double Attack} Kf6 51. Qh8+ {Weighted Error Value: White=0.06/Black=0.45} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.13"]
[Round "1.4"]
[White "Naroditsky, Daniel"]
[Black "Swiercz, Dariusz"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2621"]
[BlackElo "2649"]
[Annotator "TA"]
[PlyCount "39"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]

{[%evp 10,39,18,18,17,15,32,20,20,7,17,6,7,6,7,6,11,27,13,16,18,14,12,4,4,0,8,0,12,4,12,0]} 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Bf5 6. Be3 cxd4 {B22: Sicilian: 2 c3.} 7. Nxd4 e6 8. Nxf5 Qxf5 {[#]} 9. Qd3 $146 ({Predecessor:} 9. Nd2 Bc5 10. Bxc5 Qxc5 11. Qb3 Nf6 12. Qb5 Qe5+ 13. Qxe5 Nxe5 14. Bb5+ Ke7 15. f3 {0-1 (49) Mammadov,Z (2417)-Jones,G (2670) Chess.com INT 2020}) 9... Nge7 10. Qxf5 Nxf5 11. Bc1 O-O-O 12. Nd2 g6 13. Nf3 Bh6 14. Bxh6 {The position is equal.} Nxh6 15. Bb5 e5 16. Bxc6 bxc6 17. Ke2 f6 18. Rad1 Nf7 19. Rxd8+ Rxd8 20. Rd1 {A rather calm draw.  Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.13"]
[Round "2.1"]
[White "Hess, Robert"]
[Black "Naroditsky, Daniel"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2591"]
[BlackElo "2621"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,83,49,52,60,52,53,31,39,34,37,22,37,15,18,18,29,26,25,13,32,25,26,4,0,0,0,0,0,6,-2,-26,-33,-27,0,19,15,18,89,0,115,0,109,0,0,-217,-220,-220,-214,-214,-215,-212,-218,-222,-230,-247,-262,-532,-541,-677,-685,-29988,-29980,-29980,-29981,-29980,-29981,-29978,-29979,-29976,-592,-29999]} 1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 exd5 5. d4 c4 6. b3 cxb3 7. axb3 Bd6 8. Bd3 Ne7 {B22: Sicilian: 2 c3.} 9. O-O O-O 10. c4 Nbc6 {White is slightly better.} 11. Nc3 {[#]} h6 $146 ({Predecessor:} 11... Nb4 12. Bb1 Bf5 13. Bxf5 Nxf5 14. c5 Be7 15. Ra4 Nc6 16. Bf4 a6 17. Qd3 g6 {0-1 (37) Garcia Martin,M (2027)-Kochukova,A (1904) Batumi 2014}) 12. c5 Bb8 13. Ra4 a5 14. Re1 Nb4 15. Bb1 Bd7 16. Ra1 Bg4 17. h3 Bh5 18. Na2 Nbc6 19. Qd3 {[%csl Gb1][%cal Rd3h7]} Bg6 20. Qb5 Qc7 21. Bb2 Nf5 22. Bxf5 Bxf5 23. Nc3 Nxd4 24. Nxd4 Bd7 25. Qb6 Qh2+ 26. Kf1 Bf4 (26... Bxh3 $1 $11 27. gxh3 Ra6) 27. Nxd5 ({Stronger than} 27. Qxb7 Bxh3 28. Qxd5 (28. gxh3 Qxh3+ 29. Ke2 Rfe8+ 30. Qe7 Rxe7+ 31. Ne6 Rxe6+ 32. Ne4 Rxe4+ 33. Kd1 Qxb3#) 28... Rad8 $17) ({White must play} 27. Nce2 $1 $16 {[%cal Re2f4]} Qh1+ 28. Ng1) 27... Rae8 (27... Qh1+ $11 {remains equal.} 28. Ke2 Rae8+ 29. Kf3 Rxe1 30. Rxe1 Qxe1 31. Qxb7 (31. Nxf4 Qd2 $11) 31... Bc8 32. Ne7+ {[%mdl 64] Double Attack} Kh8) 28. Ne7+ (28. Re7 $1 $16 Bxh3 29. Nxf4 $1 {[%mdl 512]} (29. gxh3 Qh1+ {[%mdl 64] Double Attack} 30. Ke2 Qxd5 $11)) 28... Kh7 $1 $11 {Strongly threatening ...Qh1+.} 29. Qxb7 $2 (29. Bc3 $1 $11 {and White is okay.} Qh1+ 30. Ke2 Qxg2 31. Kd3) 29... Qh1+ $40 {[%mdl 128] Black goes for the king.} 30. Ke2 Rxe7+ 31. Kf3 Rxe1 32. Rxe1 Qxe1 33. Qxd7 {[#] aiming for Qf5+.} Bg5 $1 34. Qf5+ Kg8 35. Qc2 $2 (35. c6 {might work better.} Qd2 36. Nc2) 35... Re8 {White must now prevent ...Re3+!} 36. Nf5 g6 37. Nd6 {[#]} Re3+ $1 {[%mdl 512]} 38. Kg4 (38. fxe3 Qxe3+) 38... f5+ {[%mdl 64] Overworked Piece} 39. Nxf5 Re4+ 40. Kf3 gxf5 41. Qd3 Qd2 (41... Rf4+ $142 42. Kg3 Qxf2+ {[%mdl 64] Double Attack} 43. Kh2 Qxb2 44. Qa6 Kh7 45. Qd6 Qg7 46. Kg1 Rd4 47. Qg3 Rd1+ 48. Kh2 Rf1 49. c6 {[#]} Bf4 $1 {[%mdl 512]} 50. Qxf4 Rxf4 51. g4 Qb2+ {[%mdl 64] Double Attack} 52. Kg1 Qe2 53. gxf5 Rf1#) 42. Qa6 {And now Qg6+ would win.} Qf4# {Weighted Error Value: White=0.72/Black=0.30} 0-1

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.13"]
[Round "2.2"]
[White "Swiercz, Dariusz"]
[Black "Yoo, Christopher Woojin"]
[Result "1/2-1/2"]
[ECO "E05"]
[WhiteElo "2649"]
[BlackElo "2455"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,86,10,7,2,11,12,28,29,10,20,31,13,45,13,13,13,13,10,9,9,33,43,37,53,64,55,84,84,84,84,84,68,56,48,50,35,84,84,84,68,77,68,95,68,98,68,68,35,95,68,68,68,68,69,69,75,78,54,51,50,50,36,49,43,48,43,43,31,27,0,46,0,32,0,59]} 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. d4 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 b5 8. a4 {E05: Open Catalan: 5 Nf3 Be7.} Bb7 9. axb5 a6 10. Nc3 {White has an edge.} axb5 11. Rxa8 Bxa8 12. Nxb5 Bd5 13. Nc3 {[#]} Bxf3 $146 ({Predecessor:} 13... Nc6 14. e4 Nb4 15. Qb1 Bb7 16. Be3 Qa8 17. Ne5 Qa6 18. Rd1 Nc6 19. Bg5 Nxe5 20. dxe5 {1-0 (31) Lee,M (2408)-Titus,A (2185) Greensboro 2018}) 14. Bxf3 Qxd4 15. Be3 Qe5 16. Qa4 Nd5 17. Nxd5 exd5 18. b3 cxb3 19. Qxb3 Bg5 20. Bxg5 Qxg5 21. Bxd5 Nd7 22. Rd1 {aiming for Bxf7+!} Qe7 23. Qb5 g6 24. Rc1 Nf6 25. Bf3 Rd8 26. h4 h6 27. Kg2 Kg7 28. Rc4 Rd6 29. Qb7 Rd7 30. Qb2 Kg8 ({Black should play} 30... c5 $14) 31. Qc3 h5 32. Qc2 Kg7 33. Rc5 Kg8 34. Rc6 Ne8 35. Rc3 Ng7 36. Bc6 Rd6 37. e4 Qe5 38. Rc5 Qd4 39. Bd5 Ne8 40. Rc4 Qe5 41. Rc5 {[#] Hoping for Bxf7+!} Qd4 $1 42. Rc4 Qe5 $1 43. Rc5 {And now Bxf7+! would win.} Qd4 $1 {Weighted Error Value: White=0.11/Black=0.08} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.13"]
[Round "2.3"]
[White "Tang, Andrew"]
[Black "Gareyev, Timur"]
[Result "1/2-1/2"]
[ECO "A50"]
[WhiteElo "2538"]
[BlackElo "2606"]
[Annotator "RC"]
[PlyCount "105"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 {[%emt 0:00:01]} Nf6 {[%emt 0:00:05]} 2. c4 {[%emt 0:00:08]} c6 {[%emt 0:00:16]} 3. Nf3 {[%emt 0:01:52]} b5 {[%emt 0:01:46]} 4. cxb5 {[%emt 0:01:59]} cxb5 {[%emt 0:00:07]} 5. Bf4 {[%emt 0:00:01]} Nh5 {[%emt 0:08:15]} 6. Bd2 {[%emt 0:04:35]} Bb7 {[%emt 0:03:52]} 7. Qb3 {[%emt 0:29:22]} a6 {[%emt 0:04:19]} 8. a4 {[%emt 0:05:04]} e6 {[%emt 0:02:03]} 9. axb5 {[%emt 0:02:54]} Bd5 {[%emt 0:00:37]} 10. Qd3 {[%emt 0:01:43]} Nf6 {[%emt 0:02:02]} 11. Nc3 {[%emt 0:01:52]} axb5 {[%emt 0:01:26]} 12. Rxa8 {[%emt 0:00:05]} Bxa8 {[%emt 0:00:00]} 13. Qxb5 {[%emt 0:00:37]} Bd6 {[%emt 0:01:52]} 14. e3 {[%emt 0:01:26]} Bxf3 {[%emt 0:04:39]} 15. gxf3 {[%emt 0:00:04]} O-O {[%emt 0:00:11]} 16. Ne4 {[%emt 0:05:57]} Nxe4 {[%emt 0:09:54]} 17. fxe4 {[%emt 0:00:00]} Qh4 {[%emt 0:00:02]} 18. Bg2 {[%emt 0:10:29]} Nc6 {[%emt 0:01:22]} 19. e5 {[%emt 0:00:44]} Rb8 {[%emt 0:00:12]} 20. Qd3 {[%emt 0:00:27]} Be7 {[%emt 0:08:26]} 21. Bc3 {[%emt 0:01:46]} Nb4 {[%emt 0:00:37]} 22. Qe4 {[%emt 0:06:29]} Na2 {[%emt 0:00:09]} 23. Qc2 {[%emt 0:08:16]} d6 {[%emt 0:02:05]} 24. exd6 {[%emt 0:01:06]} Bxd6 {[%emt 0:00:11]} 25. h3 {[%emt 0:00:49]} g6 {[%emt 0:13:39]} 26. O-O {[%emt 0:00:54]} Nb4 {[%emt 0:07:16]} 27. Qe2 {[%emt 0:00:07]} Nd5 {[%emt 0:00:29]} 28. Ra1 {[%emt 0:00:49]} h5 {[%emt 0:00:05]} 29. Bxd5 {[%emt 0:00:58]} exd5 {[%emt 0:00:07]} 30. Qf3 {[%emt 0:00:01]} Qg5+ {[%emt 0:03:04]} 31. Kf1 {[%emt 0:01:08]} Rb5 {[%emt 0:04:39]} 32. Ra7 {[%emt 0:02:37]} Be7 {[%emt 0:03:55]} 33. Qg3 {[%emt 0:04:49]} Qxg3 {[%emt 0:05:29]} 34. fxg3 {[%emt 0:00:00]} Bd6 {[%emt 0:00:06]} 35. Kf2 {[%emt 0:00:02]} Kf8 {[%emt 0:00:31]} 36. g4 {[%emt 0:01:06]} hxg4 {[%emt 0:00:12]} 37. hxg4 {[%emt 0:00:00]} Ke8 {[%emt 0:02:29]} 38. Kf3 {[%emt 0:00:36]} Bb8 {[%emt 0:00:34]} 39. Ra5 {[%emt 0:04:41]} Rxa5 {[%emt 0:00:03]} 40. Bxa5 {[%emt 0:00:00]} Kd7 {[%emt 0:00:24]} 41. e4 {[%emt 0:00:38]} f6 {[%emt 0:04:00]} 42. b4 {[%emt 0:02:36]} Kc6 {[%emt 0:01:11]} 43. Bd8 {[%emt 0:00:16]} Bd6 {[%emt 0:05:28]} 44. Bxf6 {[%emt 0:00:06]} Bxb4 {[%emt 0:00:03]} 45. Kf4 {[%emt 0:00:04]} Bd2+ {[%emt 0:01:00]} 46. Ke5 {[%emt 0:00:03]} dxe4 {[%emt 0:00:00]} 47. Kxe4 {[%emt 0:00:50]} Kd6 {[%emt 0:00:32]} 48. d5 {[%emt 0:00:14]} Bc1 {[%emt 0:00:32]} 49. Be5+ {[%emt 0:00:31]} Kd7 {[%emt 0:00:52]} 50. Bd4 {[%emt 0:00:03]} Bh6 {[%emt 0:00:44]} 51. Be3 {[%emt 0:00:13]} Bf8 {[%emt 0:00:23]} 52. Bf4 {[%emt 0:00:05]} Ba3 {[%emt 0:00:17]} 53. Be5 {[%emt 0:00:23]} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.13"]
[Round "2.4"]
[White "Moradiabadi, Elshan"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "D26"]
[WhiteElo "2555"]
[BlackElo "2624"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,59,30,22,16,25,14,22,9,40,49,47,48,45,42,56,46,56,52,68,66,64,18,39,22,22,0,0,0,0,-1,0,0,8,6,38,0,0,0,24,0,0,0,0,0,21,0,0,0,22,0]} 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O Nc6 7. Nc3 {D26: Queen's Gambit Accepted: 4 e3 e6 5 Bxc5 c5 sidelines.} a6 8. d5 exd5 9. Nxd5 Nxd5 (9... Be7 {seems wilder.} 10. Qe2 Nxd5 11. Rd1 O-O 12. Bxd5 Qc7) 10. Bxd5 {[#]} Bd6 $146 ({Predecessor:} 10... Be7 11. e4 O-O 12. Be3 Qc7 13. Rc1 Nd8 14. Qc2 Be6 15. Rfd1 Rc8 16. Ng5 Bxg5 17. Bxg5 {1-0 (40) Tajovsky,S (1594)-Skalicky,J (1165) Ceskå Budejovice 2020}) 11. Bxc6+ bxc6 12. b3 O-O 13. Bb2 Qe7 14. Qc2 Bg4 15. Qc3 {[%csl Gb2][%cal Rc3g7] [#]} f6 16. Nd2 Rfd8 17. Nc4 Bc7 18. f3 Be6 19. Rad1 a5 20. Qc2 Bf7 21. a4 Kh8 22. e4 h6 23. Rfe1 Rxd1 24. Rxd1 Rd8 25. Bc3 Bxc4 {The position is equal.} 26. bxc4 Rb8 27. Rb1 Rd8 28. Rd1 Rb8 29. Rb1 Rd8 30. Rd1 {Weighted Error Value: White=0.10/Black=0.08} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.15"]
[Round "3.1"]
[White "Moradiabadi, Elshan"]
[Black "Hess, Robert"]
[Result "1-0"]
[ECO "D84"]
[WhiteElo "2555"]
[BlackElo "2591"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,71,14,12,14,8,48,38,63,60,59,62,68,77,93,96,162,164,154,146,147,112,179,177,167,135,214,218,262,272,405,392,358,211,542,542,541,523,539,533,542,539,519,502,564,557,540,533,525,514,482,427]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7 Na6 9. Bxa6 Qxg2 10. Qf3 Qxf3 11. Nxf3 bxa6 12. Rc1 Bb7 {D84: Grünfeld: 4 Bf4 Bg7 5 e3 0-0 6 cxd5.} 13. Ke2 Rfc8 (13... a5 $5) 14. Rc3 f6 {[#] White is slightly better.} 15. Rhc1 $146 ({Predecessor:} 15. Rd1 Kf7 16. Nd2 Bf8 17. a3 Ke8 18. Rdc1 e6 19. f3 Kd7 20. e4 Bh6 21. R1c2 {1-0 (33) Bykhovsky,A (2411)-Nasuta,G (2345) Teplice 2015}) 15... Kf7 16. Nd2 g5 17. Rc5 Bf8 18. d5 e5 (18... Re8 $16) 19. d6 $18 Ke6 20. Nc4 g4 21. Rc3 Re8 (21... Rab8 $16 {might work better.}) 22. Rd3 Kd7 23. Ke1 Bc6 {[#]} (23... Bf3 $16 24. Nd2 Re6) 24. Na5 $1 Be4 {[#]} 25. Rd2 $1 Re6 (25... Bf5 $142 26. Rc6 Rec8 27. Rxa6 Ke8) 26. Rc4 Bf3 27. Nb3 (27. e4 $142) 27... Bxd6 $2 (27... Rxd6 {is tougher.} 28. Bxd6 Bxd6) 28. Nc5+ {[%mdl 64] Double Attack. White is clearly winning.} Kxc7 29. Nxe6+ Kd7 30. Ng7 Rb8 31. Nf5 Rb6 32. e4 a5 33. Ra4 Ke6 {...Bb4! is the strong threat.} 34. Rxd6+ Rxd6 35. Nxd6 Kxd6 36. Kd2 {Weighted Error Value: White=0.09/Black=0.42} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.15"]
[Round "3.2"]
[White "Lenderman, Aleksandr"]
[Black "Tang, Andrew"]
[Result "1-0"]
[ECO "D31"]
[WhiteElo "2624"]
[BlackElo "2538"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,44,0,9,0,42,50,49,38,57,48,89,105,140,157,156,128,126,153,183,176,341,236,650,642,819,763,29994,29995,29996,29997,29999]} 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. cxd5 exd5 5. Bf4 c6 6. e3 Bf5 7. g4 Be6 8. h4 Nd7 9. Qb3 $5 {[%mdl 4] 9.Qb3 is setting a new trend. A promising side line. D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6.} Qb6 10. f3 Ngf6 {[#]} 11. h5 $146 {White is slightly better.} ({Predecessor:} 11. Bd3 c5 12. Nge2 O-O 13. h5 cxd4 14. Qxb6 Nxb6 15. Nxd4 Nc4 16. Bxc4 dxc4 17. h6 {1-0 (45) Luukkonen,T (2349)-Keinanen,T (2341) Helsinki 2018}) 11... O-O 12. Bd3 Rfc8 13. Qc2 h6 14. g5 hxg5 15. Bxg5 c5 16. Nge2 Re8 17. h6 {Hoping for hxg7.} c4 $2 {[#]} (17... g6 {is a better defense.} 18. Bxg6 Kh8) 18. Bxc4 $1 {[%mdl 512] hxg7 is the strong threat.} dxc4 $2 (18... g6) 19. hxg7 $18 Qa5 {[#]} 20. d5 $1 {[%mdl 512]} Ne5 (20... Bxd5 21. Qf5) 21. Bxf6 {[%csl Gf6,Gg7][%cal Rh1h8] White mates.} Nd3+ {[#]} 22. Qxd3 $1 {[%mdl 576] Back Rank} cxd3 23. Rh8# {White took control after the opening.  Weighted Error Value: White=0.13/Black=0.87} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.15"]
[Round "3.3"]
[White "Gareyev, Timur"]
[Black "Swiercz, Dariusz"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2606"]
[BlackElo "2649"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,77,28,0,0,0,0,7,7,3,34,34,19,16,18,28,130,115,145,141,205,210,214,218,271,260,294,306,348,330,458,441,477,403,530,528,601,601,591,566,559,546,572,542,534,520,610,600,568,542,542,542]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qa4+ Bd7 5. Qd1 Bc8 6. Nf3 Bg7 7. Qa4+ Bd7 8. Qd1 Bc8 9. cxd5 Nxd5 10. e4 Nxc3 11. bxc3 c5 12. Be3 Qa5 13. Qd2 O-O 14. Rc1 Bg4 {14...e6 is the recent fashion.} 15. Ng5 cxd4 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} 16. cxd4 Qxd2+ 17. Kxd2 Nc6 {The position is equal.} 18. h3 Bd7 19. d5 Na5 20. Bd3 h6 21. Nf3 {[#] And now Bc5 would win.} b6 $146 (21... e6 $11 {keeps the balance.}) ({Predecessor:} 21... e6 22. Bc5 Rfc8 23. Bb4 b6 24. d6 e5 25. Ba6 Rxc1 26. Rxc1 Rd8 27. Ke2 Be6 28. Rc7 Bf8 29. Nxe5 Bxd6 30. Bxd6 Rxd6 31. a3 Rd4 {½-½ (39) Kuljasevic,D (2564)-Sivuk,V (2467) Paleochora 2012}) 22. Rc7 $16 Rfd8 23. Bd4 $36 {[%mdl 2048] White is really pushing.} Bf8 (23... Bxd4 $16 {keeps fighting.} 24. Nxd4 e6) 24. Rhc1 $18 Be8 25. Ke3 Rdb8 26. Ne5 a6 27. Nc6 Nxc6 28. dxc6 b5 29. e5 e6 30. Be4 Bb4 31. Ra7 {[#] Threatens to win with c7.White is clearly winning.} Rxa7 32. Bxa7 Rc8 {If only Black now had time for ...Ba5....} 33. c7 Ba5 34. Bb8 Bb6+ 35. Kf4 Bd7 36. Bb7 $1 {[%csl LRa6,LRc8]} Re8 37. c8=Q Bxc8 38. Rxc8 Rxc8 39. Bxc8 {Black got outplayed after the opening.  Weighted Error Value: White=0.06/Black=0.35} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.15"]
[Round "3.4"]
[White "Yoo, Christopher Woojin"]
[Black "Naroditsky, Daniel"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2455"]
[BlackElo "2621"]
[Annotator "RC"]
[PlyCount "129"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 {[%emt 0:00:01]} c5 {[%emt 0:00:13]} 2. Nc3 {[%emt 0:00:02]} e6 {[%emt 0:00:29]} 3. Nge2 {[%emt 0:00:06]} Nc6 {[%emt 0:00:42]} 4. g3 {[%emt 0:00:02]} d5 {[%emt 0:02:55]} 5. exd5 {[%emt 0:00:03]} exd5 {[%emt 0:00:00]} 6. d4 {[%emt 0:00:01]} Bg4 {[%emt 0:06:25]} 7. Bg2 {[%emt 0:00:03]} Nxd4 {[%emt 0:03:31]} 8. h3 {[%emt 0:00:03]} Bf3 {[%emt 0:05:12]} 9. Kf1 {[%emt 0:00:03]} Nxe2 {[%emt 0:14:29]} 10. Bxf3 {[%emt 0:00:18]} Nxc3 {[%emt 0:00:01]} 11. bxc3 {[%emt 0:00:02]} Nf6 {[%emt 0:00:00]} 12. Rb1 {[%emt 0:06:54]} Qd7 {[%emt 0:05:54]} 13. c4 {[%emt 0:06:32]} Rd8 {[%emt 0:03:10]} 14. cxd5 {[%emt 0:03:52]} Bd6 {[%emt 0:03:37]} 15. Qe2+ {[%emt 0:05:36]} Kf8 {[%emt 0:00:02]} 16. Kg2 {[%emt 0:02:45]} b6 {[%emt 0:01:21]} 17. Qc4 {[%emt 0:04:39]} h5 {[%emt 0:04:21]} 18. a4 {[%emt 0:03:10]} Qf5 {[%emt 0:01:37]} 19. a5 {[%emt 0:04:39]} Nd7 {[%emt 0:02:40]} 20. Be4 {[%emt 0:03:44]} Qf6 {[%emt 0:00:09]} 21. h4 {[%emt 0:04:01]} Qd4 {[%emt 0:03:59]} 22. Qxd4 {[%emt 0:03:35]} cxd4 {[%emt 0:00:00]} 23. axb6 {[%emt 0:00:58]} axb6 {[%emt 0:00:09]} 24. Rd1 {[%emt 0:02:26]} Bc5 {[%emt 0:04:36]} 25. Bf4 {[%emt 0:03:29]} Re8 {[%emt 0:18:16]} 26. Re1 {[%emt 0:06:12]} g6 {[%emt 0:09:00]} 27. d6 {[%emt 0:02:52]} Ne5 {[%emt 0:01:46]} 28. Bxe5 {[%emt 0:02:47]} Rxe5 {[%emt 0:00:01]} 29. d7 {[%emt 0:00:03]} Kg7 {[%emt 0:02:43]} 30. Bc6 {[%emt 0:01:45]} Re6 {[%emt 0:02:45]} 31. Rxe6 {[%emt 0:01:10]} fxe6 {[%emt 0:00:00]} 32. Ra1 {[%emt 0:00:37]} Kf6 {[%emt 0:01:23]} 33. Ra7 {[%emt 0:01:05]} Ke5 {[%emt 0:02:14]} 34. f4+ {[%emt 0:02:30]} Kf6 {[%emt 0:00:04]} 35. Kf3 {[%emt 0:01:01]} e5 {[%emt 0:00:35]} 36. Rc7 {[%emt 0:02:01]} Rd8 {[%emt 0:00:36]} 37. Rc8 {[%emt 0:01:23]} Be7 {[%emt 0:00:03]} 38. fxe5+ {[%emt 0:02:38]} Kxe5 {[%emt 0:00:03]} 39. Bb5 {[%emt 0:00:16]} g5 {[%emt 0:01:01]} 40. hxg5 {[%emt 0:00:42]} Bxg5 {[%emt 0:00:00]} 41. Ke2 {[%emt 0:00:29]} h4 {[%emt 0:00:51]} 42. gxh4 {[%emt 0:00:22]} Bxh4 {[%emt 0:00:02]} 43. Kd3 {[%emt 0:00:39]} Be7 {[%emt 0:03:42]} 44. Rc7 {[%emt 0:01:51]} Kd5 {[%emt 0:00:32]} 45. Ba4 {[%emt 0:01:43]} Kd6 {[%emt 0:00:45]} 46. Rb7 {[%emt 0:03:39]} Kc5 {[%emt 0:00:12]} 47. Ke4 {[%emt 0:00:50]} Kb4 {[%emt 0:00:41]} 48. Bb3 {[%emt 0:00:56]} Kc5 {[%emt 0:00:38]} 49. Ke5 {[%emt 0:01:52]} Bd6+ {[%emt 0:00:21]} 50. Ke6 {[%emt 0:00:04]} b5 {[%emt 0:00:41]} 51. Bd5 {[%emt 0:01:16]} Bg3 {[%emt 0:00:15]} 52. Be4 {[%emt 0:00:39]} Bf4 {[%emt 0:00:38]} 53. Ra7 {[%emt 0:03:14]} Kb6 {[%emt 0:00:31]} 54. Ra1 {[%emt 0:00:02]} Kc7 {[%emt 0:00:36]} 55. Ra6 {[%emt 0:01:07]} Be3 {[%emt 0:00:31]} 56. Rc6+ {[%emt 0:00:15]} Kb8 {[%emt 0:00:01]} 57. Rb6+ {[%emt 0:00:38]} Ka7 {[%emt 0:00:00]} 58. Rxb5 {[%emt 0:00:04]} Bf2 {[%emt 0:00:10]} 59. Rh5 {[%emt 0:00:25]} Bg3 {[%emt 0:00:57]} 60. Ke7 {[%emt 0:01:47]} Bc7 {[%emt 0:00:23]} 61. Rc5 {[%emt 0:00:05]} Kb6 {[%emt 0:00:49]} 62. Rc6+ {[%emt 0:00:02]} Kb7 {[%emt 0:00:01]} 63. Bd5 {[%emt 0:00:04]} d3 {[%emt 0:01:23]} 64. cxd3 {[%emt 0:00:07]} Kb8 {[%emt 0:00:47]} 65. Ra6 {[%emt 0:00:05]} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.16"]
[Round "4.1"]
[White "Hess, Robert"]
[Black "Yoo, Christopher Woojin"]
[Result "1/2-1/2"]
[ECO "D43"]
[WhiteElo "2591"]
[BlackElo "2455"]
[Annotator "TA"]
[PlyCount "207"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,206,0,4,0,46,39,39,44,50,43,45,39,54,41,96,85,70,78,75,66,77,79,73,39,39,39,40,39,40,38,34,37,41,38,46,31,55,50,34,29,30,30,29,29,29,29,29,29,29,29,29,29,35,31,32,30,37,31,31,32,32,23,27,0,30,30,25,26,38,30,29,23,23,23,23,8,23,23,23,22,23,23,23,10,10,10,16,12,16,0,10,16,16,9,9,9,9,16,17,17,23,8,8,10,8,8,27,0,0,0,26,26,26,0,26,26,26,0,0,0,25,25,25,25,30,31,31,30,30,30,39,8,11,0,40,21,21,21,25,25,25,23,46,19,10,11,11,9,46,46,46,46,46,46,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. Qa4+ c6 6. Qxc4 b5 7. Qd3 a6 8. Bg5 {D43: Semi-Slav: 5 Bg5 h6.} h6 9. Bxf6 Qxf6 10. g3 {White is slightly better.} Bb7 11. Bg2 Nd7 12. O-O Qd8 {[#]} 13. Ne4 $146 ({Predecessor:} 13. e4 Be7 14. Rfd1 O-O 15. d5 cxd5 16. exd5 exd5 17. Nxd5 Nf6 18. Nxe7+ Qxe7 19. Nd4 Bxg2 20. Kxg2 {½-½ (46) Faizrakhmanov,R (2371)-Elistratov,S (2206) Moscow 2015}) 13... c5 ({Black should try} 13... Be7 $14) 14. dxc5 $16 Nxc5 15. Nxc5 Bxc5 {[#]} 16. Qc3 $1 {[%cal Rc3c5]} Bxf3 17. Bxf3 Rc8 {Threatens to win with ...Bxf2+!} 18. Qxg7 Bd4 19. Qg4 Rc4 {[#] aiming for ...Bxf2+!} 20. Rad1 Bxf2+ $1 21. Kg2 Qxd1 $1 22. Rxd1 Rxg4 23. Bxg4 $14 {[%mdl 4096] Endgame KRB-KRB} Bc5 24. Rc1 Be7 25. Rc8+ Bd8 26. b4 O-O $1 27. Ra8 Be7 28. Rxa6 Bxb4 29. Rb6 Ra8 30. Rxb5 Be7 31. Rb2 Ra5 32. Bf3 Kg7 33. Bc6 Ra3 34. Bb5 h5 35. Bc4 h4 36. Rb7 Kf8 37. Rb8+ Kg7 38. Rb7 Kf8 39. gxh4 Bxh4 40. Bb3 Bf6 41. Rb4 Ra5 42. Rg4 Re5 43. Bc4 Ra5 44. Kf3 Ke7 45. Bb3 Rh5 46. Kg2 Re5 47. Bc4 Ra5 48. Rg3 Ra4 49. Bb3 Re4 50. Kf1 Rf4+ 51. Kg2 Re4 52. Bd1 Be5 53. Rd3 Rg4+ 54. Kh1 Bc7 55. h3 Rf4 56. Kg2 Bb6 57. a4 Rf2+ 58. Kg3 Rf1 59. Bb3 Re1 60. Kf3 Rf1+ 61. Kg3 {Cut Off at move 61} Re1 62. Rd2 Rg1+ 63. Kf3 Rh1 64. Kg2 Rg1+ 65. Kf3 Rh1 66. Kg2 Rg1+ 67. Kh2 Rg5 68. Bc4 Re5 69. Bb5 Rf5 70. Rd7+ Kf6 71. Rb7 Ba5 72. Bd3 Rf4 73. Bb5 Kg5 74. Be8 f5 75. Rg7+ Kf6 76. Rg6+ Ke7 $1 {[%cal Re7e8]} 77. Bb5 e5 78. Rg1 Kf6 79. Kg2 Kg5 80. Rf1 Rxf1 81. Kxf1 $11 {KB-KB} Kh4 82. Bd7 f4 83. Kf2 e4 84. Bf5 Bb6+ 85. Kg2 f3+ 86. exf3 exf3+ 87. Kxf3 Ba5 88. Ke4 Bb6 89. Kd5 Ba5 90. Kc6 Bd8 91. Kb5 Kg5 92. Bc8 Kh6 93. a5 (93. Ka6 $16) 93... Bxa5 $1 {The position is equal.} 94. Kxa5 Kg7 95. Kb5 Kh8 96. Kc5 Kg8 97. Kd5 Kh8 98. Ke5 Kg8 99. Kf6 Kh8 100. Kg6 Kg8 101. h4 Kh8 102. h5 Kg8 103. h6 Kh8 104. Be6 {Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.16"]
[Round "4.2"]
[White "Naroditsky, Daniel"]
[Black "Gareyev, Timur"]
[Result "1-0"]
[ECO "C28"]
[WhiteElo "2621"]
[BlackElo "2606"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,68,-11,8,-4,1,-9,-1,-15,-4,-14,-7,-8,-11,-9,0,-37,-47,-36,-44,-37,-41,-31,-21,-13,-7,-11,0,0,0,0,16,10,20,10,28,18,22,31,89,25,95,20,19,26,16,16,29992,29993,29993,29994,29994,29995,29995,-29973,29996,29997,29997,29998,29998,29999,29999]} 1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nc3 Na5 5. Nge2 c6 6. Bb3 {C28: Vienna Game: 2...Nf6 3 Bc4 Nc6.} Bc5 7. O-O O-O 8. Bg5 {The position is equal.} h6 9. Bh4 Be7 {[#]} 10. d4 $146 ({Predecessor:} 10. Bg3 d6 11. f4 Ng4 12. Qd2 Qb6+ 13. Kh1 Qe3 14. Qe1 Nxb3 15. axb3 Qc5 16. Qd2 {1-0 (35) Heimann,A (2271)-Durarbayli,V (2620) chess.com INT 2019}) 10... d6 11. Qd3 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 12. f4 exd4 13. Nxd4 b4 14. Na4 c5 15. Nf3 c4 16. Bxc4 Nxc4 17. Qxc4 Qa5 18. e5 $1 {[%cal Re5f6]} Ba6 19. Qb3 $1 Bxf1 20. exf6 Bb5 $1 21. fxe7 Rfc8 22. Qd5 Qxa4 23. Nd4 Be8 (23... Bc6 $14 24. Qxd6 Be8) 24. Re1 (24. f5 $1 $16) 24... Rab8 (24... Qa6 $1 $11 {keeps the balance.}) 25. Re3 (25. f5 $16) 25... Rc5 $1 $11 {[%cal Rc5d5]} 26. Qxd6 Rbc8 27. Rg3 $36 {[%mdl 2048] Qxh6 would kill now. White has the initiative.} Kh7 $2 {[%mdl 8192]} (27... Rxc2 $11 28. Nxc2 (28. Qxh6 $2 Rc1+ 29. Kf2 R8c2+ {[%mdl 64] Double Attack} 30. Kf3 Rf1+ 31. Ke3 Re1+ 32. Kf3 Bc6+ 33. Nxc6 Rc3+ 34. Kg4 Qd1+ 35. Rf3 Rxf3 $19) 28... Qxc2) 28. Rxg7+ $1 Kxg7 29. Qf6+ Kg8 {[#]} 30. Ne6 $1 {[%mdl 512]} fxe6 {[#]} 31. Qf8+ $1 Kh7 32. Bf6 {[%csl Gf6][%cal Rf8g7] White mates.} Rg5 33. fxg5 {[%csl Gf6][%cal Rf8g7]} Kg6 34. g4 {[%cal Rf8g8]} b3 35. Qg7# {Weighted Error Value: White=0.09/Black=0.35} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.16"]
[Round "4.3"]
[White "Swiercz, Dariusz"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "B36"]
[WhiteElo "2649"]
[BlackElo "2624"]
[Annotator "TA"]
[PlyCount "203"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,202,44,38,37,41,31,57,8,8,8,12,8,8,8,12,12,10,15,26,11,76,68,68,81,76,68,74,20,26,0,71,77,110,140,165,102,98,98,127,109,166,174,151,151,264,202,213,131,264,261,259,0,259,0,217,210,254,254,243,156,185,173,270,281,252,262,255,282,347,389,381,364,372,352,295,255,242,258,239,200,221,220,309,52,52,52,52,52,52,52,1106,52,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,106,8,8,8,8,8,60,8,8,8,8,8,8,8,8,8,8,8,8,8,7,0,8,8,8,8,8,8,8,8,8,8,8,8,8,0,0,0,0]} 1. c4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. e4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6 8. f3 Bg7 9. Be3 O-O 10. Qd2 Be6 11. Rc1 Qa5 12. Be2 Rfc8 13. b3 a6 14. Na4 Qxd2+ 15. Kxd2 Nd7 16. g4 f5 17. exf5 {B36: Sicilian: Maroczy Bind: Gurgenidze System.} gxf5 18. h3 Rf8 19. Rhf1 {White is slightly better.} d5 20. Nc5 Nxc5 21. Bxc5 {[#]} dxc4 $146 ({Predecessor:} 21... fxg4 22. hxg4 Rfd8 23. Bb6 Rdc8 24. c5 Bd7 25. Rh1 Be5 26. Rcd1 {½-½ (26) Ribli,Z (2574)-Stevic,H (2512) Bled 2002}) 22. Bxc4 Bxc4 23. Rxc4 b5 24. Rc2 Rf7 25. Ke2 e5 (25... fxg4 $11 26. hxg4 Rc8) 26. Be3 $16 fxg4 27. hxg4 Rf6 28. Rc7 Raf8 29. Bc5 ({White should try} 29. g5 $16 R6f7 30. Rxf7 Kxf7 31. Rc1) 29... Re8 $11 30. Be3 Ref8 $1 31. g5 $36 {[%mdl 2048] White has strong initiative.} Re6 32. Rfc1 Rd8 33. Ra7 (33. R1c6 $1 $18 {[%cal Rc6e6]} Rde8 34. Rxe6 Rxe6 35. Kd3) 33... Rg6 $16 34. Rcc7 Rf8 35. Re7 Rc8 (35... h6 $16) 36. Kd3 $1 $18 Rf8 37. Ke4 Rc8 (37... h6 $16) 38. Rac7 Rf8 39. Rb7 Rc8 (39... h6 $16) 40. Rec7 Rf8 41. Re7 Rc8 $1 42. Rbc7 Rf8 43. Red7 Re8 44. Rf7 Rd8 45. Rcd7 Rc8 46. Ra7 Rd8 (46... h6 $142 47. Kf5 Rcc6 48. gxh6 Bxh6) 47. a4 bxa4 48. bxa4 a5 49. Rfc7 Rf8 50. Rxa5 h5 51. Raa7 h4 52. Rc2 h3 53. Rh2 Rc6 {Black hopes to continue with ...Rc4+.} 54. Rxh3 Rc4+ 55. Kd5 Rc3 56. Bb6 Rf4 (56... Rd3+ $142 57. Ke4 Rd2) 57. Rc7 $2 (57. Bc5 $18) 57... Rxc7 $14 58. Bxc7 Rxa4 {[%mdl 4096] Endgame KRB-KRB} 59. Ke6 Ra3 $1 60. Kf5 Re3 $2 {[%mdl 8192] [#]} (60... Kf7 $14) 61. Bb6 $2 {Cut Off at move 61} (61. Kg6 $1 $18) 61... Rb3 (61... Rd3 $14) 62. Bd8 $16 {Threatens to win with Kg6.} Kf7 {[#]} 63. Bf6 $1 Bxf6 64. gxf6 {KR-KR} Rb1 65. Rh7+ (65. Kxe5 $6 Rb5+ 66. Ke4 Kxf6 $11) 65... Kf8 66. Rd7 Rb2 67. Ke6 {[%cal Rd7d8]} Rb6+ 68. Rd6 (68. Kxe5 Rb2 $14) 68... Rb8 69. Ra6 (69. Kxe5 Rb1 $14) 69... Rc8 70. Ra7 (70. Kxe5 Rc1 $14) 70... Rc6+ 71. Kf5 ({But not} 71. Kxe5 Rc1 $14) 71... Rc1 72. Rd7 Rc2 73. Ke6 {[%cal Rd7d8]} Rc6+ 74. Rd6 ({Don't take} 74. Kxe5 Rc3 $14) 74... Rc8 75. Rb6 ({Don't do} 75. Kxe5 Rc3 $14) 75... Ra8 76. Rb4 Ra6+ 77. Kf5 Ra1 78. Rb6 Kf7 79. Rb7+ Kf8 80. Rd7 Ra2 81. Ke6 {[%cal Rd7d8]} Ra6+ 82. Rd6 Ra8 83. Kxe5 (83. Rb6 $16) 83... Ra1 $11 84. Rd7 (84. f4 {keeps more tension.} Re1+ 85. Kf5 Rb1 86. f7 Kxf7 87. Rd7+) 84... Re1+ 85. Kf5 Ra1 86. f4 (86. Rb7 $1 $14) 86... Rb1 {The position is equal.} 87. Ra7 Rc1 88. Rh7 Ra1 89. Rg7 Rb1 90. Rc7 Ra1 91. f7 Ra6 92. Kg5 Rg6+ 93. Kf5 {Threatening mate with Rc8+.} Ra6 94. Rd7 Rb6 95. Ke5 Ra6 96. f5 Rb6 97. Ra7 Rc6 98. Kf4 Rb6 99. Kg5 Rc6 100. f6 {Strongly threatening Ra8+.} Rc5+ 101. Kg6 {Ra8+ would kill now.} Rg5+ 102. Kxg5 {Black escapes into a draw.  Weighted Error Value: White=0.36/Black=0.18} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.16"]
[Round "4.4"]
[White "Tang, Andrew"]
[Black "Moradiabadi, Elshan"]
[Result "1-0"]
[ECO "A47"]
[WhiteElo "2538"]
[BlackElo "2555"]
[Annotator "TA"]
[PlyCount "129"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,129,1,14,11,18,20,12,17,10,12,14,-11,31,32,31,22,30,40,14,32,39,0,31,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,8,5,5,6,-43,65,0,0,2,15,0,0,0,25,0,0,0,0,0,0,0,0,0,0,0,-5,-287,0,-547,0,0,0,0,9,0,188,8,377,368,344,12,23,12,20,25,29,0,8,8,8,16,105,105,1447,2272,1756,1677,810,734,730,389,389,385,29976,29977,29976,29978,29978,29979,29979,29980,29980,29981,29980,29980,29982,29979,29979,29980,29980,29981,29984,29985]} 1. d4 Nf6 2. Bf4 e6 3. e3 b6 4. Nf3 Bb7 5. Nbd2 d6 6. a4 {[#] A47: 1 d4 Nf6 2 Nf3 b6: Torre, London and Colle Systems.} Nc6 $146 ({Predecessor:} 6... a5 7. Bd3 Nbd7 8. h3 Be7 9. O-O O-O 10. Bh2 Re8 11. Qe2 Bf8 12. Nc4 Ne4 13. Nfd2 Nxd2 14. Nxd2 {½-½ (55) Batsiashvili,N (2457)-Divya,D (2305) chess.com INT 2020}) 7. Bd3 g6 8. c3 {The position is equal.} Bg7 9. O-O O-O 10. Qc2 h6 11. h3 Re8 12. Bh2 e5 13. a5 exd4 14. a6 Bc8 15. exd4 Bd7 16. b4 b5 17. Bxb5 Nxb4 $1 18. Qa4 $1 Bxb5 19. Qxb5 Rb8 20. Qa5 Nc6 21. Qa2 Qd7 22. d5 Ne7 {[%cal Bc6e7,Be7f5,Bf5d4,Bd4e2][%mdl 32]} 23. c4 Nf5 24. Rab1 Rb6 $1 25. Rxb6 cxb6 26. Rb1 (26. g4 $5 {[%cal Rg4f5]} Ne7 27. Re1 $11) 26... g5 (26... h5 $15) 27. g4 ({Better is} 27. Qc2 $14) 27... Nxg4 $11 28. hxg4 Nd4 29. Qa3 Qxg4+ 30. Kh1 Qh3 {aiming for ...Re2.} (30... Re2 $5 31. Rg1 $8 Qh3 $11) 31. Rg1 Ne2 {And now ...Bc3 would win.} 32. Rg2 g4 (32... Nf4 $5 33. Rg3 $8 Qd7 $11) 33. Qa4 Re7 34. Ng1 Nxg1 35. Rg3 Qh5 36. Rxg1 Re2 $1 {[%csl LRd2,LRf2]} 37. Nf1 $2 {[%mdl 8192]} (37. Qd1 $1 $11 Rxf2 38. Nf1) 37... Rxf2 $2 ({Black should play} 37... Qf5 $1 $19 {[%cal Rf5f3]} 38. Qd1 Qe4+ 39. Rg2 h5) 38. Qd7 $2 {[%mdl 8192] [#]} (38. Qd1 $1 $11 {and White stays safe.}) 38... f5 $2 (38... g3 $1 $19 {[%cal Rf2h2][%mdl 512]} 39. Qe8+ (39. Nxg3 Rxh2#) 39... Kh7 40. Rxg3 Rxf1+ 41. Kg2 Rc1) 39. Qxd6 (39. Qxa7 Qh3 $1 {[%mdl 512]} 40. Qa8+ Kh7 41. Qg8+ Kxg8 42. Rg3 Rxf1+ 43. Rg1 Qf3#) 39... Kh7 {Hoping for ...f4.} ({Don't blunder} 39... Qh3 $2 40. Qg3 $18) 40. Qg3 Rf3 41. Qg2 (41. Qc7 $2 Qh3 $19) 41... f4 $2 (41... Be5 $1 $11) 42. Qe2 $2 ({Not} 42. Nd2 Rh3 $11) (42. Qc2+ $1 $18 Kh8 43. d6) 42... Qf5 $2 {[%mdl 8192]} (42... Qe5 $11 {and Black is okay.} 43. Qc2+ Kg8) 43. Nd2 $18 Rd3 44. Bxf4 $2 ({Weaker is} 44. Qxg4 Qxg4 45. Rxg4 Rxd2 $14) ({White has to play} 44. Rxg4 $18 Re3 45. Qd1) 44... Rh3+ $11 45. Bh2 Be5 $1 46. Rg2 {Strongly threatening Rf2.} g3 {[%mdl 64] Pin} 47. Nf3 Bd6 48. Qe6 Qxe6 49. dxe6 {Rxg3! is the strong threat.} gxh2 {[%mdl 4096] Endgame KRB-KRN} (49... Kg6 $1 $11) 50. Rd2 $1 $16 {[%cal Rd2d6]} Bf4 $2 {[%mdl 8192]} (50... Bc5 $16 51. Nd4 Ra3) 51. Rd3 $1 $18 {White wants to mate with e7.} Kg7 52. e7 Kf7 {[#]} 53. Ne5+ $1 {[%mdl 576] Discovered Attack} Bxe5 54. Rxh3 Kxe7 55. Rxh6 {KR-KB} Bc7 $2 (55... Kd7 $18 56. Rxb6 Bd4 57. Rb7+ Kc6 58. Kxh2 Be5+ 59. Kh3 Bd4) 56. Rh8 {White mates.} Kd6 57. Ra8 b5 58. cxb5 Bb6 {[#]} 59. Rc8 $1 Bc7 {[#]} 60. Kg2 $1 {[%cal Rg2h1]} Kd7 61. Ra8 Bb6 62. Kxh2 Kc7 63. Rg8 Kd6 64. Rc8 Kd7 65. Rc6 {White used his chance. Accuracy: White = 72%, Black = 66%.} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.17"]
[Round "5.1"]
[White "Tang, Andrew"]
[Black "Hess, Robert"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2538"]
[BlackElo "2591"]
[Annotator "TA"]
[PlyCount "174"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,174,-2,8,8,0,0,21,0,0,-8,20,22,20,-13,23,7,34,30,51,37,43,27,44,34,77,13,151,-29,-25,-40,44,0,0,-11,-1,-143,7,-178,-153,-168,-152,-148,0,0,17,11,7,21,10,11,0,9,10,14,9,8,66,58,50,52,47,60,52,0,0,0,37,0,15,0,6,0,0,0,0,0,31,0,0,0,0,0,0,-18,-31,-12,-27,-42,-13,-88,13,13,16,16,16,16,16,16,16,16,20,20,20,20,20,20,20,16,17,17,18,16,16,0,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,13,52,52,52,52,52,52,52,52,55,55,55,55,55,69,85,0,0,0,0,0,0,0,0,0,0,0,8,8,8,0,8,0,8,0,8]} 1. d4 d5 2. Bf4 c5 3. e3 Nc6 4. Nf3 Nf6 5. Nbd2 e6 6. c3 Nh5 7. Bg5 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} f6 8. Bh4 g6 9. Bb5 {[#]} a6 $146 ({Predecessor:} 9... Bd7 10. dxc5 Bxc5 11. O-O O-O 12. e4 a6 13. Ba4 dxe4 14. Nxe4 Be7 15. Nfd2 Qc7 {0-1 (44) Grabinsky,A (2457)-Kaczur,F (2489) Budapest 2020}) 10. Ba4 b5 11. Bc2 cxd4 12. exd4 Bh6 13. Ne5 Nxe5 14. dxe5 Qc7 15. exf6 (15. Bxf6 Nxf6 16. exf6 b4 $15) 15... Qe5+ 16. Kf1 O-O 17. Nf3 Qf4 18. g3 ({Better is} 18. Kg1 $16) 18... Qc4+ (18... Qc7 $1 $11) 19. Bd3 $2 (19. Kg2 $16) 19... Qc7 $11 20. g4 Nf4 (20... Nxf6 $15 21. g5 {[%mdl 64] Double Attack} Ne4 22. gxh6 Rxf3) 21. g5 $14 e5 22. Bg3 e4 23. Qd2 (23. gxh6 exd3 24. Qd2 Rxf6 $15) (23. h4 $1 $11 Bg4 {[%mdl 64] Pin} 24. Be2 exf3 25. Bxf3 Bxf3 26. Qxf3 Qc4+ 27. Kg1) 23... Rxf6 ({Black should play} 23... Bh3+ $17 24. Kg1 Rxf6) 24. gxf6 $2 {[#]} (24. h4 $1 $11 Rf7 25. gxh6 exf3 26. Bxf4 Rxf4 27. h5) 24... Bh3+ $1 $19 25. Ke1 exd3 26. Nd4 (26. Bxf4 $2 Bxf4 27. Qxd3 Re8+ 28. Kd1 Bf5 $19) 26... Re8+ (26... Qe5+ $17 27. Kd1 Qxf6 28. Bxf4 Qxf4 29. Qxf4 Bxf4) 27. Kd1 $11 Re4 {And now ...Rxd4! would win.} 28. f3 Qe5 29. Re1 ({Avoid the trap} 29. fxe4 $2 Qh5+ 30. Ke1 Ng2+ 31. Qxg2 Bxg2 $19) 29... Qxf6 30. Bxf4 (30. fxe4 $2 {perishes.} Bg4+ 31. Kc1 Ne2+ 32. Nxe2 Bxd2+ 33. Kxd2 dxe2 $19) 30... Bxf4 31. Qxd3 Rxe1+ 32. Kxe1 Qh4+ $1 33. Ke2 {White wants to play Re1.} Qg5 ({Black should try} 33... Bd7 $1 $11 34. Kd1 Qxh2) 34. Re1 $1 $14 Qg2+ 35. Kd1 {Hoping for Ne2.} Qxb2 36. Qc2 Qa3 37. Re2 (37. Re8+ $14 Kg7 38. Ne2 Bxh2 39. Qd3 Qa4+ 40. Ke1 Qh4+ 41. Kd2) 37... Kf7 $11 38. Ke1 Kf6 39. Nb3 Bf5 40. Qd1 {aiming for Qd4+.} Qd6 41. Nd4 Bd7 42. Qc2 Qc5 {Strongly threatening ...b4.} 43. Qb2 Bd6 44. Kd1 Qc4 45. Qb3 Qc5 46. Rb2 Be5 (46... a5 {feels hotter.} 47. a3 Be5 48. Rd2 h5 49. Kc2 Bf4) 47. Qb4 Qxb4 {[%mdl 64] [#] Overworked Piece} 48. Rxb4 Bxh2 {[%mdl 4096] Endgame KRN-KB} 49. a4 Bd6 50. Rb2 (50. Rb1 $11 {keeps the balance.}) 50... Be5 (50... b4 $1 $17 51. Kd2 Bc5) 51. axb5 Bxd4 52. bxa6 Bg1 {Threatening ...Bc8.} ({But not} 52... Bxc3 $2 53. Rb6+ Ke7 54. a7 $18) 53. Rb7 Bc8 54. Rc7 Bxa6 {...Kf5 is the strong threat.} 55. Rc6+ {[%mdl 64] Double Attack} Ke5 56. Rxa6 {KR-KB} Be3 57. Ke2 Bf4 $1 58. Kd3 Kf5 59. Ra8 Be5 60. Rd8 Ke6 61. Re8+ {Cut Off at move 61} Kf5 62. Rd8 Ke6 63. c4 dxc4+ 64. Kxc4 Bf6 65. Ra8 h5 66. Kd3 Kf5 67. Ke3 Bg5+ 68. Kf2 Bf4 69. Rf8+ Kg5 70. Ke2 h4 71. Rh8 Be5 72. Rh7 Bf6 73. Kf2 Kf5 74. Kg2 g5 75. Kh3 Be5 76. Ra7 Bf4 77. Rf7+ Ke6 78. Rxf4 (78. Rf8 $16) 78... gxf4 {The position is equal.} 79. Kxh4 $16 {KP-KP} Kf5 80. Kh5 Kf6 81. Kg4 Ke5 82. Kg5 Ke6 83. Kxf4 {Kg5 would kill now.} Kf6 84. Kg4 {Intending Kf4 and mate.} Kg6 85. Kf4 Kf6 86. Kg4 {White wants to mate with Kf4.} Kg6 87. Kf4 {Threatening mate with Ke5.} Kf6 {Weighted Error Value: White=0.23/Black=0.21} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.17"]
[Round "5.2"]
[White "Moradiabadi, Elshan"]
[Black "Swiercz, Dariusz"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2555"]
[BlackElo "2649"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,78,-6,-3,-8,0,-16,-6,-2,-9,-18,-12,-41,-45,-41,-35,-42,-36,-63,-35,-30,-33,-35,-3,-12,-12,-13,0,0,0,-35,0,-2,0,-16,0,0,0,-11,-7,-29,-20,-45,-4,-4,-2,-5,0,-8,0,-47,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2 Bf5 5. Qb3 Qc7 6. Nh4 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4.} Be6 7. e3 g6 8. Nhf3 Bg7 9. cxd5 cxd5 10. Bb5+ Nc6 {[%cal Bb8c6,Bc6a7,Ba7b5][%mdl 32]} 11. O-O O-O 12. Qa3 {[#]} a5 $146 ({Predecessor:} 12... Na5 13. b3 Rfc8 14. Bb2 Bf8 15. Rac1 Qd8 16. b4 Nc4 17. Bxc4 dxc4 18. e4 Bg4 {1-0 (35) Mamedyarov,S (2743)-Potkin,V (2621) Dubai 2014}) 13. Qa4 Na7 14. Bd3 Rfc8 15. Qd1 Bf5 16. Bxf5 gxf5 17. Ne1 Nb5 18. a4 Nd6 19. b3 b5 20. axb5 Nxb5 21. Bb2 Nc3 22. Bxc3 Qxc3 23. Nef3 e6 24. h3 Ne4 25. Ra2 Qd3 {White must now prevent ...Nc3.} 26. Nxe4 Qxd1 {[#]} 27. Nf6+ $1 {[%mdl 512]} Bxf6 28. Rxd1 Be7 29. g4 fxg4 30. hxg4 {The position is equal.} Rc3 31. Rb1 Bb4 32. Kg2 Kg7 33. Ng1 Rac8 34. Ne2 R3c7 35. Kf3 h6 36. Rbb2 Rc6 37. Rb1 R6c7 38. Rbb2 Kf6 39. Rb1 Kg7 {Weighted Error Value: White=0.07/Black=0.08} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.17"]
[Round "5.3"]
[White "Lenderman, Aleksandr"]
[Black "Naroditsky, Daniel"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2624"]
[BlackElo "2621"]
[Annotator "TA"]
[PlyCount "92"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,92,9,9,14,6,4,10,19,14,33,0,18,0,29,20,29,22,29,14,15,10,24,8,23,6,21,20,17,12,19,11,19,0,19,23,18,21,37,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Bg5 Ne4 3. Bf4 d5 4. Nd2 Nxd2 5. Qxd2 Bf5 6. e3 e6 7. Nf3 Bd6 {A45: Trompowsky Attack.} 8. Bg3 O-O 9. c4 {[#]} dxc4 $146 ({Predecessor:} 9... c6 10. Be2 Re8 11. O-O Bxg3 12. hxg3 Nd7 13. b4 dxc4 14. Bxc4 e5 15. Qb2 e4 {1-0 (35) Schussler,H (2465)-Ost Hansen,J Gjovik 1985}) 10. Bxc4 Be4 11. O-O Nd7 (11... Bxf3 $5 12. gxf3 Nd7 $14) 12. Qc3 Bxg3 13. hxg3 c5 14. Rfd1 Qf6 15. Be2 cxd4 16. Nxd4 Rfc8 17. Qa3 Bd5 18. Rac1 a6 19. Bf3 {[#] Threatens to win with Rxc8+.} Bxf3 20. Nxf3 {And now Rxc8+ would win.} Ne5 21. Nxe5 Qxe5 22. Rxc8+ Rxc8 $11 {[%mdl 4096] Endgame KQR-KQR} 23. Qe7 {Threatening mate with Rd8+.} g6 24. Qxb7 Rc2 $1 25. Qb4 {aiming for Rd8+.} Kg7 {The position is equal.} 26. Qd4 Qxd4 27. Rxd4 Rxb2 {KR-KR} 28. Ra4 Rb1+ 29. Kh2 Rb6 30. g4 g5 31. Ra5 h6 32. g3 Kg6 33. Kg2 f5 34. Kh3 h5 35. gxf5+ exf5 36. f4 Re6 {[#]} 37. e4 $1 {[%cal Re4f5][%mdl 512]} Rxe4 38. Rxa6+ Kg7 39. fxg5 Rg4 40. a4 Rxg5 41. a5 Rg4 42. Rb6 Ra4 43. a6 f4 44. gxf4 Rxf4 45. Rb5 Ra4 46. Rxh5 Rxa6 {A rather calm draw.  Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.17"]
[Round "5.4"]
[White "Gareyev, Timur"]
[Black "Yoo, Christopher Woojin"]
[Result "1/2-1/2"]
[ECO "A35"]
[WhiteElo "2606"]
[BlackElo "2455"]
[Annotator "TA"]
[PlyCount "39"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,39,0,0,8,-9,0,-6,0,0,0,-11,-24,-22,0,0,0,0,7,-7,9,0,0,0,0,0]} 1. e3 g6 2. Nf3 Bg7 3. c4 c5 4. Nc3 Nf6 5. d4 cxd4 6. Nxd4 Nc6 7. Nc2 O-O 8. Be2 d6 9. O-O Bf5 {A35: Symmetrical English: 2 Nc3 Nc6 3 Nf3.} 10. f3 d5 11. cxd5 Nxd5 12. Nxd5 {[#] Hoping for e4.} Bxc2 13. Qxc2 {Rd1 is the strong threat.} Qxd5 14. Rd1 Qa5 {[#] The position is equal.} 15. Bd2 $146 ({Predecessor:} 15. Qb3 Rad8 16. Kf2 Rxd1 17. Qxd1 Rd8 18. Qc2 Qe5 19. g3 Qh5 20. Kg2 Qa5 21. Kf2 {½-½ (40) Egyed,A (2254)-Halak,M (2173) Slovakia 2016}) 15... Qb6 16. Rab1 Rfd8 17. Qb3 Rd6 18. Kf2 Qxb3 19. axb3 Rad8 20. Ke1 {Not much happened in this game.  Weighted Error Value: White=0.05/Black=0.06} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.18"]
[Round "6.1"]
[White "Hess, Robert"]
[Black "Gareyev, Timur"]
[Result "0-1"]
[ECO "E15"]
[WhiteElo "2591"]
[BlackElo "2606"]
[Annotator "TA"]
[PlyCount "132"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,132,44,23,83,83,84,80,82,85,108,109,102,98,100,102,109,70,150,127,129,118,122,80,70,55,117,121,153,158,154,153,141,116,120,82,104,75,102,93,104,52,41,38,45,0,0,0,18,0,0,0,0,0,0,-33,0,-21,0,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-5093,-5093,-29967,-29969,-29967,-29964,-29966,-29965,-29975,-29975,-29982,-29983,-29983,-29984,-29984,-29985,-29988,-29989,-29989,-29990]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4 Bb7 6. Bg2 c5 7. dxc5 Bxc5 8. O-O Be7 9. Bf4 O-O 10. Nc3 Na6 11. Rfd1 Nc5 12. Qc2 Nce4 {[#] E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} (12... Qc8 $11) 13. Ne5 $1 $16 {[%cal Rc3e4]} Nxc3 14. Bxb7 Nxd1 {White is better.} 15. Rxd1 Rc8 16. Bxc8 Qxc8 {[#]} 17. Qa4 $1 d5 18. Qxa7 Bc5 19. Nd3 Bd4 ({Better is} 19... Re8 $14) 20. cxd5 {[#]} Nxd5 $146 ({Predecessor:} 20... Qc2 21. Rd2 Qb1+ 22. Kg2 Ne4 23. dxe6 fxe6 24. Qd7 Nxd2 25. Qxe6+ Kh8 26. Bxd2 Qc2 {½-½ (55) Schneider,S (2387)-Barkhagen,J (2432) Sweden 2014}) 21. Rc1 Qd8 22. Qa4 Nxf4 23. gxf4 e5 (23... Qd5 $14) 24. Rc4 ({Don't go for} 24. Nxe5 $2 Bxe5 25. Qd1 Bxb2 $19) 24... h5 25. fxe5 ({Don't play} 25. Nxe5 $6 Bxe5 26. fxe5 Qg5+ 27. Kh1 Qxe5 $14) 25... Bxe5 26. Qb5 Re8 27. Kf1 Bf6 28. Rc6 Qa8 29. f3 Bd4 30. Rc7 Rf8 31. a3 ({White should try} 31. Qd7 $16 Be3 32. Ra7) 31... Qd8 $1 $14 {[%cal Rd8c7]} 32. Rc4 g6 33. Qc6 Qh4 34. Qe4 Qh3+ $1 35. Ke1 Bg1 36. Qh4 Qg2 37. Qg3 Qh1 {( -> ...Be3+)} 38. Kd2 Bxh2 39. Qh3 {Threatens to win with Rh4.} Rd8 {[#]} 40. Qh4 $1 {[%mdl 512]} Rxd3+ 41. exd3 $11 {[%mdl 4096] Endgame KQR-KQB} Qg2+ 42. Kc1 {Strongly threatening Qf6.} Qf1+ 43. Kc2 Qe2+ 44. Kb1 Qxd3+ 45. Ka2 {Hoping for Rc8+.} Qd5 46. Qe4 Qxe4 47. Rxe4 {KR-KB} (47. fxe4 $2 {loses.} g5 $19) 47... g5 48. b4 h4 49. a4 {And now Rg4 would win.} f5 50. Re2 Bd6 {aiming for ...h3.} 51. a5 bxa5 $1 52. bxa5 h3 $1 {[%cal Rh3h2] ...h2 is the strong threat.} 53. a6 {Intending a7 and mate.} Bc5 54. Rh2 g4 55. fxg4 fxg4 56. Rc2 Bd4 $1 {White must now prevent ...g3.} 57. Rd2 $2 {[%mdl 8192]} (57. Rh2 $11) 57... Ba7 $19 58. Rh2 Kf7 {Black mates.} 59. Kb3 Ke6 60. Kc4 Ke5 61. Re2+ {Cut Off at move 61} Kf4 62. Kd5 g3 63. Re4+ Kf3 64. Rh4 h2 65. Rh7 g2 66. Rh3+ Kg4 {Black used his chance.  Weighted Error Value: White=0.39/Black=0.08} 0-1

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.18"]
[Round "6.2"]
[White "Yoo, Christopher Woojin"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "A84"]
[WhiteElo "2455"]
[BlackElo "2624"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,55,18,15,13,13,12,6,8,23,8,8,13,17,17,41,7,18,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 f5 2. c4 Nf6 3. Nc3 e6 4. Nf3 Bb4 5. Bd2 O-O 6. g3 b6 7. Bg2 Bb7 8. O-O a5 9. Rc1 {A84: Dutch Defence: 2 c4 Miscellaneous.} Qe7 {[#]} 10. a3 $146 ({Predecessor:} 10. Ne1 Bxg2 11. Nxg2 d6 12. Nf4 Bxc3 13. Bxc3 g5 14. Nd3 Nbd7 15. Qa4 Ne4 16. Be1 {0-1 (44) Jedlicka,A (2288)-Ivanov,M (2424) Hradec Kralove 2011}) 10... Bxc3 11. Bxc3 Ne4 12. Nd2 Nxc3 13. Rxc3 Bxg2 14. Kxg2 a4 15. e4 Nc6 {[%cal Bb8c6,Bc6d4,Bd4b3][%mdl 32] The position is equal.} 16. d5 Nd4 17. Re1 f4 18. e5 Qf7 19. Nf3 Nb3 20. Rd3 Nc5 21. Rd4 Qh5 22. Ng1 Qh6 23. Qg4 {[%cal Rd4f4]} Rf5 {Hoping for ...Raf8.} 24. gxf4 Nb3 25. Rde4 Nc5 26. Rd4 $1 Nb3 27. Rde4 Nc5 28. Rd4 {An uneventful encounter.  Weighted Error Value: White=0.03/Black=0.02} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.18"]
[Round "6.3"]
[White "Naroditsky, Daniel"]
[Black "Moradiabadi, Elshan"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2621"]
[BlackElo "2555"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,64,9,-5,-2,35,35,72,81,92,85,90,28,22,20,52,10,41,0,0,0,2,-45,-38,-125,-158,-355,-361,-387,-373,-329,-376,-352,-352,-695,-640,-29969,-29970,-29967,-29968,-29968,-29968,-5181,-281,-988,-921,-892,-397,-29979,-29980,-29980,-5306,-29993,-29989,-29989,-29990,-29990,-29981]} 1. b3 e5 2. Bb2 Nc6 3. e3 a6 4. Nf3 e4 5. Nd4 Nxd4 6. Bxd4 {A01: Nimzowitsch-Larsen Opening.} Nf6 $5 {[%mdl 4] Leaves trodden paths.} 7. c4 c5 8. Bxf6 {White is better.} Qxf6 9. Nc3 Qe5 {[#]} 10. f4 $146 (10. Rc1 $16) ({Predecessor:} 10. Qc2 f5 11. d3 exd3 12. Bxd3 g6 13. Rd1 Bg7 14. Nd5 O-O 15. O-O Rb8 16. Rd2 {½-½ (75) Pujari,R (2156)-Nimmy,A (2128) Bhayandar 2015}) 10... exf3 $1 $11 11. Qxf3 Bd6 12. Bd3 O-O 13. O-O-O Rb8 14. Rdf1 b5 15. Qh3 {[%csl Gd3][%cal Rh3h7]} g6 16. Nd5 (16. Kc2 $15) 16... Qa1+ $17 17. Bb1 $2 {This costs White the game.} (17. Kc2 $17 Qxa2+ 18. Kd1) 17... f5 $19 18. g4 {[%cal Rg4f5]} Bb7 $1 {[%cal Rb7d5]} 19. gxf5 Bxd5 20. fxg6 hxg6 {Threatens to win with ...Be4.} 21. cxd5 $2 {[#]} (21. Qxd7 Rbd8 22. Rxf8+ Bxf8 23. Qxd8) 21... c4 $1 ({Not} 21... Be5 22. Qxd7 Qb2+ 23. Kd1 $11) 22. Qxd7 Ba3+ 23. Kd1 Qxb1+ 24. Ke2 Qd3+ 25. Ke1 {[#]} Qe4 $2 (25... Rbe8 $1 {( -> ...Rxe3+!)} 26. Rxf8+ Rxf8 27. Qe6+ Kg7 28. Qd7+ Kg8 29. Qe6+ Kg7) 26. Rhg1 $2 {[#]} (26. Qe6+ Qxe6 27. dxe6) 26... c3 $1 27. Ke2 (27. dxc3 Qxe3+) 27... cxd2 (27... c2 $142 {Hoping for ...Rxf1.} 28. Ra1 Rf6) 28. Qc6 $2 (28. Rxf8+ $19 Rxf8 29. Qe6+ Qxe6 30. dxe6) 28... Rxf1 29. Rxf1 Re8 (29... Qg4+ $142 30. Kxd2 Qg2+ {[%mdl 64] Double Attack} 31. Kd3 Qxf1+ 32. Kd2 Qg2+ 33. Kd3 Bb2 34. Qe6+ Kh8 35. h3 Rf8 36. Qg4 Qxd5+ 37. Ke2 Bc3 38. Qh4+ Kg8 39. Qf4 Qg2+ {[%mdl 64] Double Attack} 40. Kd3 Rxf4 41. exf4 Qf3+ 42. Kc2 Qe3 43. h4 Qd2+ 44. Kb1 Qd1#) 30. Qc3 Qg2+ {Black mates.} 31. Rf2 {[#]} Qxf2+ $1 {[%mdl 576] Decoy, Promotion} 32. Kxf2 d1=N+ {Weighted Error Value: White=1.36/Black=0.56} 0-1

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.18"]
[Round "6.4"]
[White "Swiercz, Dariusz"]
[Black "Tang, Andrew"]
[Result "1-0"]
[ECO "C79"]
[WhiteElo "2649"]
[BlackElo "2538"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,69,47,43,46,38,39,42,45,33,34,28,42,28,22,35,43,43,56,30,88,89,89,89,100,83,105,104,337,103,110,106,95,78,106,113,115,66,66,54,65,42,61,54,137,137,128,88,737,724,739,-545,716,723,581,683]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. Re1 c5 8. c3 Be7 9. d4 cxd4 {C79: Ruy Lopez: Steinitz-type lines with 3...a6 4 Ba4 Nf6 5 0-0 d6.} 10. cxd4 exd4 11. Nxd4 Bd7 {White is slightly better.} 12. Nc3 O-O {[#]} 13. Bg5 $146 ({Predecessor:} 13. h3 Re8 14. Bf4 Qb8 15. b3 Qb7 16. Qd3 Rad8 17. Rad1 h6 18. Qf3 c5 19. Nde2 {1-0 (47) Harikrishna,P (2731)-Oleksienko,M (2594) Germany 2020}) 13... Re8 14. Qd3 h6 15. Bh4 Qb8 16. b3 Qb7 17. Rad1 c5 (17... a5 $11) 18. Nf5 $16 Bxf5 19. exf5 Rad8 20. g3 a5 21. Re2 Ng4 $2 (21... d5 $16) 22. Bxe7 $2 (22. Rxe7 $18 {and the rest is easy.} Rxe7 23. Nd5 {[%mdl 64] Pin}) 22... Rxe7 23. Rxe7 Qxe7 24. Qe4 $1 {[%cal Re4e7]} Ne5 25. Nd5 ({But not} 25. f4 $6 Nc6 $14) 25... Qd7 26. Kg2 Nc6 27. Re1 Nd4 28. Ne7+ Kh8 29. Qd5 {Strongly threatening f6.} f6 {[#]} (29... Rf8 $14) 30. Re4 $1 {And now Qf7 would win.} Kh7 31. g4 Re8 $2 {[%mdl 8192] [#]} (31... Rf8 $16) 32. Qf7 $1 $18 {[%mdl 512] White threatens Qg6+ and mate.} Nc6 {[#]} 33. Qg6+ $1 Kh8 {[#]} 34. Qxe8+ $1 {[%mdl 512]} Qxe8 35. Ng6+ {[%mdl 64] Discovered Attack.  Weighted Error Value: White=0.19/Black=0.26} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.19"]
[Round "7.1"]
[White "Swiercz, Dariusz"]
[Black "Hess, Robert"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2649"]
[BlackElo "2591"]
[Annotator "TA"]
[PlyCount "127"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,127,8,0,12,26,40,39,44,50,101,93,123,125,118,124,125,122,121,126,124,118,113,136,120,102,139,100,93,86,97,108,122,114,122,120,112,122,129,131,151,89,108,78,263,245,262,245,246,242,351,352,375,254,425,418,510,513,508,467,460,451,468,430,414,381,336,339,553,545,511,469,468,485,492,487,500,496,491,497,501,486,487,493,481,475,571,458,573,528,525,550,651,639,577,595,842,814,1087,1040,6141,5950,5433,5218,2303,2286,29976,4710,29982,29983,29981,29978,29990,29987,29988,29988,29988,29981]} 1. e4 {Mowsziszian,K} c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3 e5 7. Nde2 Nbd7 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 8. O-O b5 9. b4 Bb7 {[#] White is slightly better.} 10. Ng3 $146 ({Predecessor:} 10. a4 bxa4 11. Bg5 Be7 12. Rxa4 O-O 13. Qa1 d5 14. exd5 Nxd5 15. Bxe7 Qxe7 16. Nxd5 Bxd5 {1-0 (30) Campora,D (2545)-Sutovsky,E (2565) Biel 1996 CBM 055 [Mowsziszian,K]}) 10... d5 (10... h5 $14) 11. Nxd5 $16 Nxd5 12. exd5 Nf6 13. c4 bxc4 14. Bxc4 Bxd5 15. Bxd5 Qxd5 16. Qc2 Qb7 17. Bb2 Be7 18. Bxe5 {[#] Black must now prevent Nf5.} O-O 19. Rab1 Rfc8 20. Qb2 Ne8 21. Rfe1 Rc4 {[%cal Rc4b4]} 22. a3 Rac8 23. Nf5 {[%cal Re5g7]} Bf8 24. Qe2 Qb5 25. Qf3 $36 {[%mdl 2048] White is on the roll.} a5 26. Ne3 ({White should play} 26. Bxg7 Bxg7 27. Qh5) 26... R4c6 27. Qd5 Qa4 $2 {[#] Black cannot hold the game after this.} (27... Rb6 $16) 28. b5 $18 ({Weaker is} 28. Qxa5 Qxa5 29. bxa5 Rc5 $14) ({Less strong is} 28. bxa5 Rc5 $16) 28... Rc5 29. Qd4 Qxd4 30. Bxd4 Rh5 (30... R5c7 {keeps fighting.} 31. a4 f6) 31. a4 Rh4 32. Red1 Rd8 $2 (32... Nd6 33. g3 Re4) 33. g4 f6 34. Kg2 h5 35. h3 hxg4 36. hxg4 Bb4 37. f3 Kf7 38. Nf5 Rh8 39. Bb6 Rb8 $2 (39... Rxd1 {is a better defense.} 40. Rxd1 g6) 40. Bf2 Rb7 41. Rbc1 g6 42. Nd4 Nc7 43. Nc6 Ne6 44. Rc4 g5 45. Bg3 Ra8 46. Nxb4 axb4 47. Rxb4 Nc5 48. Rdd4 Rba7 49. Bd6 Ne6 50. Rdc4 Rd7 51. Rc6 Kg6 52. Re4 Nd8 53. Rb6 Nf7 54. Be7 Rd2+ 55. Kg3 Ra2 56. Rxf6+ Kg7 57. Ra6 Rc8 58. Bf6+ Kh7 59. Rc6 (59. Re7 $142 Kg8 60. b6 Nd6 61. Bxg5 Rb2 62. Bf4 Nf7 63. b7 Rd8 64. Ra7) 59... Ra8 60. Re7 {White mates.} Kg8 61. Rcc7 R8xa4 62. Re8+ Kh7 63. Rxf7+ Kg6 64. Ref8 {Weighted Error Value: White=0.12/Black=0.32} 1-0

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.18"]
[Round "7.2"]
[White "Tang, Andrew"]
[Black "Naroditsky, Daniel"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2538"]
[BlackElo "2621"]
[Annotator "TA"]
[PlyCount "20"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,20,9,10,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Bf4 c5 3. e3 Qb6 4. Nc3 Qxb2 5. Nb5 Nd5 {The position is equal.} 6. Rb1 {A45: Trompowsky Attack.} Qxa2 7. Ra1 Qb2 8. Rb1 {[#]} Qa2 $146 ({Predecessor:} 8... Qxb1 9. Qxb1 a6 10. Bc4 axb5 11. Bxd5 e6 12. Bf3 b4 13. dxc5 Bxc5 14. Ne2 Nc6 15. O-O O-O 16. c3 d5 17. Rc1 {1-0 (36) Aronyak,G (2436)-Prithu,G (2472) Lichess.org INT 2020}) 9. Ra1 Qb2 10. Rb1 Qa2 {An uneventful encounter. Not enough moves} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.19"]
[Round "7.3"]
[White "Moradiabadi, Elshan"]
[Black "Yoo, Christopher Woojin"]
[Result "1/2-1/2"]
[ECO "E06"]
[WhiteElo "2555"]
[BlackElo "2455"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,83,20,8,15,7,40,37,42,43,33,8,36,27,29,27,37,27,30,27,25,29,29,0,0,10,15,0,0,0,0,-4,0,0,0,0,0,-9,-14,-17,5,10,138,140,141,146,139,149,168,26,28,0,23,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. d4 Be7 5. Bg2 O-O 6. Qc2 dxc4 7. Qxc4 a6 {E06: Closed Catalan: Early deviations.} 8. Bg5 Bd7 9. O-O Bc6 {White is slightly better.} 10. Rd1 {[#]} Nbd7 $146 ({Predecessor:} 10... Bd5 11. Qd3 Be4 12. Qe3 Nbd7 13. Nc3 Bc6 14. Qd3 b5 15. e4 b4 16. Bxf6 Nxf6 {1-0 (42) Kotsur,P (2559)-Tokhirjanova,H (2135) Dushanbe 2013}) 11. Qc2 h6 {[#] And now ...Be4 would win.} 12. Bxf6 Nxf6 13. Nc3 Bb4 14. Rac1 Qe7 15. a3 Bxc3 16. Qxc3 Rfd8 17. Bf1 Bxf3 18. Qxf3 c6 19. Qb3 Rd7 20. Rd3 Rad8 21. Rcd1 h5 22. Bg2 h4 23. Bf3 Ne8 24. Qc3 Nc7 25. Qc4 (25. e3 {feels hotter.} Nb5 26. Qc2 Qf6 27. Qe2 Qg6 28. a4) 25... hxg3 (25... Nb5 {is more complex.} 26. e4 Qf6 27. e5 Qf5 28. Be2 hxg3 29. fxg3 Qg5) 26. hxg3 e5 (26... Nb5 $11) 27. dxe5 $16 Rxd3 28. Rxd3 Rxd3 29. Qxd3 ({Much worse is} 29. exd3 $6 Qxe5 30. d4 Qe7 $11) 29... Qxe5 30. Qd8+ (30. Qd7 $18) 30... Ne8 $11 31. Bg4 Kh7 32. Qd7 Nd6 $1 {The position is equal.} 33. b4 g6 34. Bf3 Kg7 35. Kg2 Kf8 36. Qd8+ Kg7 37. Qc7 Kf8 38. Qb8+ Kg7 39. Qc7 Kf8 40. Qd8+ Kg7 41. Qd7 Kf8 42. Qd8+ {Weighted Error Value: White=0.12/Black=0.11} 1/2-1/2

[Event "USA-ch Online Qualifier 2021"]
[Site "Online"]
[Date "2020.12.19"]
[Round "7.4"]
[White "Lenderman, Aleksandr"]
[Black "Gareyev, Timur"]
[Result "1-0"]
[ECO "E60"]
[WhiteElo "2624"]
[BlackElo "2606"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2020.12.11"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,63,42,43,46,33,0,0,0,12,0,2,-23,-24,-24,-32,-23,-27,-20,-17,-23,-26,-31,-30,-15,-14,-39,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-161,-152,-156,71,63,149,154,160,154,150,149,29998,29999]} 1. Nf3 d6 2. d4 Nf6 3. c4 Bf5 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. Qb3 {E60: King's Indian: Unusual lines and Fianchetto Variation without Nc3.} Qc8 8. Nc3 Nc6 9. Rd1 {The position is equal.} Ne4 {[#]} 10. Nd5 $146 ({Predecessor:} 10. Be3 Re8 11. Nh4 Nxc3 12. bxc3 Bg4 13. Nf3 Rb8 14. Rab1 Na5 15. Qa4 b6 16. Rb2 {0-1 (33) Hruschka,G-Giese,E (1838) Sao Paulo 2007}) 10... a5 11. Qe3 e6 12. Nc3 Nxc3 13. Qxc3 e5 {White must now prevent ...exd4.} 14. Be3 Bg4 15. dxe5 dxe5 16. Rd2 Re8 17. Rad1 h6 18. Qa3 e4 19. Nd4 Ne5 20. Qa4 Bd7 $36 {[%mdl 2048] White is under pressure.} 21. Nb5 Bc6 22. Qb3 a4 23. Qb4 f5 24. Bh3 Nf7 25. Bf4 e3 26. fxe3 $2 {[#]} (26. Bxe3 $11 b6 27. Bf4) 26... g5 $1 $19 {[%cal Rg5f4]} 27. Qc5 Ne5 $2 (27... gxf4 $17 {and life is bright.} 28. exf4 Bf8 29. Qxf5 Qxf5 30. Bxf5 Bb4) 28. Na7 $16 Qb8 ({Better is} 28... Qe6 $14 29. Nxc6 Qxc6 30. Qxc6 bxc6) 29. Nxc6 Nxc6 30. Qxf5 {Strongly threatening Rd7.} gxf4 31. Rd7 {Qf7+ would kill now.} ({Much less strong is} 31. exf4 Kh8 $14) 31... Qa7 $2 {[%mdl 8192] [#]} (31... Re7 $16) 32. Qf7+ {[%mdl 64] Double Attack.  Weighted Error Value: White=0.12/Black=0.46} 1-0

