[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.1"]
[White "Obodchuk, Andrei"]
[Black "Vasquez, Georges"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2303"]
[BlackElo "1864"]
[Annotator "TA"]
[PlyCount "37"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,37,69,70,80,79,143,138,207,196,321,327,360,341,598,597,587,577]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Nge2 c5 7. Be3 cxd4 8. Nxd4 Nc6 9. Qd2 a6 10. Be2 Bd7 11. O-O Rb8 12. Nc2 Qc7 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0.} 13. Rac1 {[#]} e6 $146 (13... Rfc8 $142) ({Predecessor:} 13... Rfc8 14. Nd5 Qd8 15. Nb6 Rc7 16. Rfd1 Qf8 17. c5 dxc5 18. e5 Nxe5 19. Bf4 Rc6 20. Qa5 {½-½ (58) Dragnev,V (2483)-Tifferet,S (2273) Mamaia 2017}) 14. Rfd1 Ne8 (14... Rfd8 $16 15. Qxd6 Qxd6 16. Rxd6 Be8) 15. c5 $18 d5 (15... Qd8 $142 16. cxd6 b5) 16. exd5 exd5 17. Nxd5 Qa5 {[#]} (17... Qe5 18. Bf4 {[%mdl 64] Skewer} Qxb2) 18. Ne7+ $1 {[%mdl 576] Discovered Attack} Kh8 19. Qxa5 {White took control after the opening.  Weighted Error Value: White=0.01/Black=0.88} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.2"]
[White "Nazarov, Nicolai"]
[Black "Gurbanov, Andrei"]
[Result "0-1"]
[ECO "D30"]
[WhiteElo "1770"]
[BlackElo "2252"]
[Annotator "TA"]
[PlyCount "24"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,24,-73,-70,-73,-46,-42,-42,-54,-52,-57,-47,-170,-155,-204,-222,-206,-207]} 1. d4 d5 2. c4 e6 3. a3 {[%cal Ba2a3,Ba3a4][%mdl 32]} dxc4 4. Nc3 a6 {[#]} 5. a4 $146 ({Predecessor:} 5. e3 b5 6. a4 b4 7. Nb1 Bb7 8. Nf3 Bd5 9. Nbd2 c3 10. Nc4 cxb2 11. Bxb2 {½-½ (49) Dzenis,J (2090)-Spierenburg,P (1982) ICCF email 2013}) 5... Nc6 6. Nf3 {D30: Queen's Gambit Declined: Systems without Nc3.} Rb8 7. e4 b5 8. d5 {aiming for axb5.Black is slightly better.} Nb4 9. axb5 axb5 10. Bf4 {[#]} ({White should try} 10. Be2 $1 $15) 10... exd5 $1 $19 {Black is clearly better.} 11. exd5 Nf6 12. Bg5 Be7 {Black took control after the opening.  Weighted Error Value: White=0.32/Black=0.03} ({Much less strong is} 12... Nbxd5 13. Bxf6 Nxf6 14. Qxd8+ Kxd8 15. Ne5 $17) 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.3"]
[White "Gedgafov, Chamal"]
[Black "Kaydanovich, Marina"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2202"]
[BlackElo "1737"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,57,8,33,28,29,29,46,31,35,-85,-85,-97,-93,-90,-59,-70,-52,-60,-60,-63,0,5,13,-209,-200,-236,-224,-303,-279,-565,0,-9,975,933,944,946,1210,1054,29996,29997,29997,29998,29998,29999]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. cxd5 exd5 6. e3 c6 7. Bd3 h6 8. Bh4 Be6 9. Qc2 {D35: Queen's Gambit Declined: Exchange Variation.} Nbd7 10. Nge2 Bd6 11. Rc1 {White is slightly better.} O-O {[#]} 12. O-O $146 {[#]} (12. f3 $14 {keeps the upper hand.}) ({Predecessor:} 12. a3 Rc8 13. b4 a5 14. Qb3 b5 15. Bg3 a4 16. Qb1 Nb6 17. Bxd6 Qxd6 18. h3 {0-1 (39) Perez Toledo,A (1625)-Lopez Colon,F (2036) Gran Canaria 2015}) 12... Bxh2+ $1 $17 13. Kh1 (13. Kxh2 Ng4+) 13... Bd6 14. f3 g5 15. Bf2 Nh5 16. g4 Ng7 {Hoping for ...f5.} 17. Ng3 Bxg3 (17... Qe7 $15) 18. Bxg3 $11 f5 19. Kg2 $2 (19. Qh2 $1 $11) 19... fxg4 $19 20. fxg4 Bxg4 21. Bh7+ Kh8 22. Qg6 $2 (22. Bg6) 22... Rxf1 $2 (22... Nf5 $19 23. Rce1 Qe7 24. Qxf5 Bxf5 25. Bxf5 Qg7) 23. Rxf1 $40 {[%mdl 128] White has some attack.} (23. Qxh6 $5 {[%cal Rh7g6]} Rf2+ 24. Bxf2 $11) 23... Nf8 $2 {[%mdl 8192] [#]} (23... Qe8 $11) 24. Rxf8+ $1 $18 {[%mdl 512]} Qxf8 25. Qxh6 {White threatens Bg6+ and mate.} Qf3+ 26. Kh2 {Bg6+ would kill now.} Qxe3 27. Bg6+ {White mates.} Kg8 28. Qh7+ Kf8 29. Bd6+ {Weighted Error Value: White=0.54/Black=0.81} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.4"]
[White "Aleksandrova, Aleksandra"]
[Black "Glazar, Domagoj"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "1728"]
[BlackElo "2142"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,96,-51,-45,-44,0,0,0,-43,-38,-35,-37,-47,-56,-93,-66,-84,23,20,20,10,0,0,-8,-31,-8,-50,33,0,0,-64,-75,-84,-20,-78,-63,-141,-154,-110,-110,-121,24,-169,-171,-281,-270,-270,-251,-265,-255,-315,-315,-309,-301,-263,-257,-333,-323,-329,-329,-321,-247,-231,-258,-331,-316,-396,-374,-728,-535,-535,-535,-739,-604,-472,-457,-384,-262,-254,-250,-777,-743,-751,-729,-742,-740,-692,-679,-4841,-4023]} 1. d4 Nf6 2. e3 d5 3. Nd2 Bf5 4. Be2 e6 {[#]} 5. g4 $146 ({Predecessor:} 5. Ngf3 c5 6. c3 h6 7. O-O Nc6 8. Bb5 a6 9. Bxc6+ bxc6 10. Qa4 Qb6 11. Ne5 Rc8 12. dxc5 Bxc5 13. b4 {1-0 (45) Jimenez Gonzalez,J (1823)-Seguel,R Cumana 2014}) 5... Bg6 6. h4 {Threatens to win with h5. A45: Trompowsky Attack.} h5 7. g5 Nfd7 8. f4 {The position is equal.} c5 9. c3 Qc7 10. Nh3 Bd6 11. Nf1 Be4 12. Rg1 g6 ({Black should try} 12... Nc6 $17) 13. Ng3 $11 Bf5 14. Nxf5 exf5 15. Bf3 Nb6 16. Qe2 Nc6 17. a4 cxd4 (17... O-O $15) 18. exd4+ Kf8 {White must now prevent ...Re8.} 19. Qg2 (19. Kf2 $11) 19... Re8+ $15 20. Kf2 Kg7 ({Better is} 20... Na5 $17 21. Bxd5 Nxd5 22. Qxd5 Kg7) 21. a5 (21. Bd1 $11 {remains equal.}) 21... Nc4 $1 $17 22. Bxd5 (22. b3 $15 N4xa5 23. Bxd5) 22... N6xa5 23. b4 Nb3 $36 {[%mdl 2048] White is under strong pressure.} 24. Rxa7 Ra8 (24... Nxc1 $6 25. Rxc1 Bxf4 26. Rxb7 $15) (24... Rb8 $17 25. Qf1 Rhc8) 25. Rxa8 $2 {This move loses the game for White.} (25. Rxb7 $11 Ra2+ 26. Kg3 (26. Kf3 $2 Ne5+ {[%mdl 64] Discovered Attack} 27. Kg3 Qxc3+ {[%mdl 64] Double Attack} 28. Qf3 Qxf3+ 29. Bxf3 Nxf3 $19) 26... Rxg2+ 27. Kxg2) 25... Rxa8 $19 26. Qf3 (26. Kg3 $142) 26... Ra2+ 27. Kg3 Rc2 28. Qd3 {[#]} Na3 {[%mdl 512]} 29. c4 ({Don't go for} 29. Bxb3 $2 Rxc3 30. Qxc3 Qxc3+ 31. Kh2 Qxb3 $19) 29... Nxc1 30. Rxc1 Rxc1 31. Qxa3 Rd1 32. c5 Rxd4 {[%cal Rd6f4]} ({Not} 32... Bxf4+ 33. Nxf4 Rxd4 34. Qf3 $17) 33. cxd6 Qxd6 {[%mdl 64] Double Attack} 34. Bf3 Qxb4 35. Qa1 {[#]} b5 36. Ng1 {aiming for Ne2.} Kh7 37. Ne2 Rd3 38. Qf6 $2 (38. Qa7 Qc4 39. Nc1) 38... Qc4 39. Kf2 Qe6 40. Qxe6 fxe6 41. Nc1 Rc3 42. Ne2 Rc2 43. Ke3 {[#]} b4 $1 {[%cal Bb5b4,Bb4b3,Bb3b2][%mdl 32]} 44. Kd3 $2 (44. Nd4 Rh2 45. Kd3) 44... b3 {Black is clearly winning.} 45. Nd4 Rf2 {...b2 is the strong threat.} 46. Be2 b2 47. Kc2 Rxf4 48. Nxe6 Re4 {Weighted Error Value: White=0.71/Black=0.28} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.5"]
[White "Zakharova, Evgeniya"]
[Black "Pilimon, Zbigniew"]
[Result "1-0"]
[ECO "E08"]
[WhiteElo "2045"]
[BlackElo "1638"]
[Annotator "TA"]
[PlyCount "133"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,132,28,40,-15,-28,-21,-15,-35,0,-21,-25,-57,-11,-25,-21,-18,2,-9,0,0,0,0,14,0,0,-22,-32,-7,-28,-21,0,-51,-34,-55,-26,-43,-6,-22,-16,-37,0,-6,40,0,0,-8,0,-218,-210,-233,-215,-218,-222,-220,-207,-208,-145,-183,-145,-266,-252,-438,-437,-428,-416,-381,0,0,1293,1285,1176,1089,1094,1013,4082,2766,5069,5069,5306,5165,5120,5189,6079,3601,29954,29953,29972,29973,29978,29979,29979,29980,29980,29981,29980,29982,29982,29983,29983,29984,29984,29985,29987,29988,29988,29989,29989,29990,29991,29991,29991,29992,29994,29988,29988,0,29997,29998,29998,29999,29999]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Nbd7 5. Bg2 Be7 6. O-O O-O 7. Qc2 b6 8. Nbd2 {E08: Closed Catalan: Main Line: 7 Qc2.} (8. cxd5 $14 Nxd5 9. Nc3) 8... Bb7 $11 9. Rd1 Rc8 10. cxd5 {The position is equal.} exd5 {[#]} 11. Qa4 $146 ({Predecessor:} 11. Ne5 c5 12. Ndf3 cxd4 13. Qa4 Nc5 14. Qxd4 Ne6 15. Qa4 a6 16. b4 b5 17. Qb3 {0-1 (41) Fransson,P (1511)-Lund,P (2029) Helsingor 2015}) 11... c5 12. Ne5 Nxe5 (12... cxd4 $5 {[%cal Rd7e5]} 13. Nxd7 Nxd7 $15) 13. dxe5 {[#]} Bc6 $1 14. Qc2 Ne8 15. Nf3 Nc7 16. Nd4 Bd7 17. Nf5 Be6 18. e4 {And now exd5 would win.} d4 19. h4 f6 20. Nxe7+ Qxe7 21. exf6 Qxf6 22. Bg5 (22. f4 $11) 22... Qf7 $15 23. Rd2 Bg4 24. Bf4 Rfd8 (24... Ne6 $5 {[%cal Re6f4]} 25. Bd6 Rfe8 $11) 25. f3 Be6 26. Be5 Nb5 27. Qa4 Bd7 28. Qd1 Qe6 29. f4 Nd6 30. b3 (30. Bxd6 $11 Qxd6 31. b3) 30... Nf7 $19 31. Bxd4 cxd4 32. Rxd4 Bc6 33. Rc1 Rxd4 34. Qxd4 Rd8 35. Qe3 Qd7 36. e5 (36. Bf3 $17 {might work better.}) 36... Bxg2 37. e6 $2 (37. Kxg2 {was the only defense.} Nh6 38. Qe2) 37... Qb7 38. exf7+ Kxf7 39. Qe5 {Rc7+ is the strong threat.} Rd7 ({Black should try} 39... Kg8 $19 {White must now prevent ...h6.} 40. Qb2 Bh3) 40. Re1 {Intending Qf5+ and mate.} Re7 $2 {[%mdl 8192]} (40... Bh3 $11 41. Qh5+ g6 42. Qxh7+ Kf8 43. Qh8+ Kf7 44. Qh7+ Kf8 45. Qh8+ Kf7 46. Qh7+) 41. Qxe7+ $18 {[%mdl 64] [#] Overworked Piece} Qxe7 42. Rxe7+ Kxe7 43. Kxg2 {[%mdl 4096] Endgame KP-KP} h5 44. Kf3 Kf6 45. Ke4 Ke6 46. f5+ Kd6 47. Kd4 Ke7 48. Ke5 a6 49. a3 Kf7 50. b4 Ke7 51. a4 Kf7 52. Kd5 Kf6 53. b5 axb5 54. axb5 Kxf5 {K3P-K3P} 55. Kc6 Kg4 56. Kxb6 Kxg3 57. Kc5 Kxh4 {KPP-KP} 58. b6 g5 59. b7 g4 60. b8=Q Kh3 61. Kd4 g3 62. Ke3 h4 63. Qf4 g2 64. Qf2 $2 ({Weaker is} 64. Kf2 g1=Q+ 65. Kxg1 $11) (64. Qf5+ {mates} Kg3 65. Qe5+ Kg4 66. Kf2 h3 67. Qf6 g1=R 68. Kxg1 Kg3 69. Qe5+ Kf3 70. Kh2) 64... Kh2 $2 {[%mdl 8192]} (64... g1=Q $11) 65. Qxh4+ {White mates.} Kg1 66. Kf3 Kf1 67. Qf2# {What a bad dream for Black.  Weighted Error Value: White=0.31/Black=0.36} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.6"]
[White "Kimsanboyev, Axadxon"]
[Black "Anfinogenov, Artem"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1636"]
[BlackElo "2032"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,109,0,4,0,0,0,0,0,22,-44,-47,-37,-41,-82,-45,-52,-22,-30,-16,-35,-31,-29,-31,-30,-36,-81,-70,-119,-113,-114,-102,-90,-57,-62,-31,-89,-91,-137,-139,-140,-138,-140,-130,-128,-128,-169,-169,-169,-169,-206,-206,-225,-220,-243,-231,-241,-218,-377,-298,-448,-452,-518,-523,-3574,-3683,-3599,-2800,-2314,-2155,-6071,-2171,-29982,-29982,-29982,-29983,-29983,-29984,-29984,-29985,-29985,-29986,-29986,-29987,-29987,-29988,-29989,-29990,-29990,-29991,-29993,-29994,-29994,-29995,-29996,-29997,-29997,-29998,-29998,-29999,-29999]} 1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nd2 c5 5. c3 Nc6 6. Bd3 Bd6 7. Bxd6 {7.Bxd6 scores better than 7.Bg3. D00: 1 d4 d5: Unusual lines.} Qxd6 8. f4 cxd4 9. cxd4 {The position is equal.} h6 {[#]} 10. Qf3 $146 (10. a3 $11) ({Predecessor:} 10. a3 g5 11. g3 gxf4 12. gxf4 Bd7 13. Ngf3 Ne7 14. Ne5 Qb6 15. Qb3 Qxb3 16. Nxb3 {0-1 (46) Bestard Borras,M (2204)-Huerga Leache,M (2440) Gijon 2011}) 10... Nb4 $15 11. Bb1 Bd7 12. a3 {[#]} Qa6 $1 {White must now prevent ...Rc8.} 13. Nb3 {[#]} Qc4 14. Qd1 {[#]} Ba4 $1 15. Nd2 (15. axb4 Qxb4+) 15... Bxd1 16. Nxc4 Nc2+ 17. Bxc2 Bxc2 18. Ne5 Ke7 19. Ngf3 Rhc8 20. Ke2 Ne4 21. Rhc1 f6 22. Nd3 Kd6 (22... Nd6 {is interesting.} 23. g4 b6 24. Nb4 Ba4 25. Nd2 g5) 23. Nc5 (23. Nd2 $15) 23... Nxc5 $17 {Black keeps a firm grip on the game.} 24. dxc5+ Rxc5 25. Nd4 Rac8 26. Kd2 {aiming for b4.} Ba4 27. Rxc5 Rxc5 28. Rc1 Rxc1 29. Kxc1 $19 {[%mdl 4096] Endgame KB-KN} Bd7 30. b4 e5 31. Nb3 b6 32. Kd2 Ba4 33. Nc1 Bb5 34. Kc3 $2 (34. Nb3 {keeps fighting.}) 34... Bc4 35. g4 (35. f5 $142) 35... g5 36. f5 Bf1 37. Nd3 Bxd3 38. Kxd3 {KP-KP} a5 39. Kc3 Kc6 40. a4 Kd6 (40... Kc7 $142 41. bxa5 bxa5) 41. h3 Kc6 {Black mates.} 42. Kb3 axb4 43. Kxb4 e4 44. Kb3 Kc5 45. Kc3 d4+ 46. exd4+ Kd5 47. Kd2 Kxd4 48. Ke2 e3 49. Ke1 Kd3 50. Kd1 e2+ 51. Ke1 Ke3 52. h4 gxh4 53. g5 h3 54. g6 h2 {[%cal Rh2h1]} 55. g7 h1=Q# {Weighted Error Value: White=0.49/Black=0.19} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.7"]
[White "Valenta, Vit Vaclav"]
[Black "Petrov, Maksim"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2028"]
[BlackElo "1568"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,110,-37,-9,-13,-17,-45,-27,-53,-26,-51,-46,-47,-43,-70,-62,-66,-41,-64,-59,-99,-38,-48,-45,-29,-45,-58,-28,-85,-64,-156,-129,-170,-170,-217,-97,-94,-100,-183,-165,-306,-283,-547,-545,-822,-775,-720,-549,-544,-549,-549,-549,-529,-408,-404,-396,-450,-439,-525,-514,-499,-502,-520,-509,-488,-452,-428,-418,-417,-384,-1100,-1019,-1457,-1291,-1361,-1157,-29981,-29982,-29982,-29983,-29983,-29978,-29979,-29980,-29980,-12843,-29984,-12833,-12833,-12834,-12834,-12835,-12835,-12835,-12837,-12837,-12831,-7457,-12841,-12841,-12843,-12843,-12845,-12845]} 1. b4 e5 2. Bb2 f6 3. a3 d5 4. d3 Be6 5. Nd2 a5 6. b5 {A00: Irregular Openings.} Bd6 {[#]} 7. g3 $146 ({Predecessor:} 7. Ngf3 Ne7 8. c4 O-O 9. Rc1 Nd7 10. g3 dxc4 11. Nxc4 Nc5 12. Bg2 a4 13. O-O {1-0 (63) Valenta,V (2163)-Simet,M (1903) Kouty nad Desnou 2015}) 7... Nh6 8. Bg2 {Black has an edge.} Nd7 9. Ngf3 O-O 10. c4 c6 11. a4 Qe7 12. O-O g5 13. e4 d4 $1 14. Nb3 Qg7 (14... cxb5 $17 15. cxb5 Bb4) 15. Bc1 Nf7 16. Ne1 c5 17. Kh1 Kh8 18. Bd2 (18. Bf3 $11) 18... Bc7 19. f4 ({White should try} 19. Bf3 $15) 19... gxf4 20. gxf4 exf4 21. Bxf4 Nfe5 (21... Bxf4 $19 {and Black stays clearly on top.} 22. Rxf4 Nfe5) 22. Qd2 Rg8 23. Rg1 (23. Nc1 $17) 23... Qg4 $19 {[#] ...Nxc4 is the strong threat.} 24. Bg3 (24. Rf1 {might work better.}) 24... Nxc4 25. dxc4 (25. Bf3 Qxg3 26. Rxg3 Nxd2 27. Rxg8+ Rxg8 28. Nxd2) 25... Bxg3 26. Bf3 Qh3 27. Qg2 Bxe1 28. Qxh3 Rxg1+ 29. Kxg1 Bxh3 30. Rxe1 Rg8+ 31. Kf2 b6 32. Nd2 Ne5 {Threatens to win with ...Nd3+.} 33. Rd1 Nxf3 34. Nxf3 {[%mdl 4096] Endgame KRB-KRN} Rg2+ 35. Ke1 Bg4 36. Rd3 Rc2 37. Nd2 Rc3 38. Rxc3 dxc3 {KB-KN} 39. Nf1 {[#]} (39. Nb3 Bf3 40. Nc1) 39... Bf3 40. Ng3 Kg8 41. Nf5 Bxe4 42. Ne7+ Kf7 43. Nc8 Ke6 44. Nxb6 Kd6 45. Kd1 f5 46. Nc8+ Kd7 (46... Kc7 $142 47. Ne7 f4 48. b6+ Kxb6 49. Ke2 c2 50. Kd2 f3 51. h3 f2 52. Nd5+ Bxd5 53. cxd5 f1=Q 54. Kxc2 c4 55. Kd2 Qd3+ {[%mdl 64] Double Attack} 56. Ke1 c3 57. Kf2 c2 58. Kg2 c1=Q 59. h4 Qcd2+ 60. Kh1 Qf1#) 47. Na7 Kc7 (47... f4 $142 48. b6 f3 49. b7 Bxb7 50. Kc2 f2 51. Nb5 Be4+ 52. Kxc3 f1=Q 53. Na3 Qg2 54. Kb3 Qxh2 55. Nc2 Qxc2+ 56. Ka3 Qxc4 57. Kb2 Qxa4 58. Kc3 Qc2#) 48. b6+ {Black is clearly winning.} Kxb6 49. Nb5 c2+ 50. Kd2 Kc6 51. Nc3 Kd6 52. Ne2 Ke5 53. Nc1 Kd4 54. Nb3+ Kxc4 55. Nxa5+ Kb4 {[%mdl 64] Double Attack.  Weighted Error Value: White=0.81/Black=0.32} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.8"]
[White "Nikitskaya, Varvara"]
[Black "Tsapalin, Sergey"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1173"]
[BlackElo "1981"]
[Annotator "TA"]
[PlyCount "50"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,50,18,36,0,-6,10,81,0,0,0,1,-51,-55,-60,-45,-145,-125,-122,-122,-110,-61,-89,-83,-95,-92,-166,-160,-223,-211,-1135,-1129,-1194,-1189,-2375,-2088]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be7 8. f3 Be6 9. Qd2 O-O 10. h4 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} Nbd7 11. g4 {[#]} Nc5 $146 (11... b5 $11 {remains equal.}) ({Predecessor:} 11... b5 12. h5 Nb6 13. g5 Nfd7 14. Nd5 Bxd5 15. exd5 Nc4 16. Bxc4 bxc4 17. Na5 c3 18. Qxc3 Bxg5 {1-0 (37) Abdrlauf,E (2381)-Wernberg,H (2179) Fredericia 2020}) 12. h5 (12. O-O-O $16) 12... Nxb3 $11 13. axb3 d5 14. g5 {[#]} ({White should play} 14. exd5 $11 Nxd5 15. Nxd5 Bxd5 16. Kf2) 14... d4 $1 $15 {aiming for ...Nd7.} 15. gxf6 Bxf6 16. Nd5 ({Better is} 16. Nd1 $15) 16... Bxd5 $17 ({Don't play} 16... dxe3 17. Nxf6+ Qxf6 18. Qxe3 $15) 17. exd5 dxe3 18. Qxe3 Qxd5 19. Bd3 e4 20. Bxe4 Qe5 21. Ke2 (21. c3 $17) 21... Rae8 {[#] White must now prevent ...Bg5.} 22. Rag1 (22. Kf1 $17) 22... Bd8 $19 {Strongly threatening ...f5.} ({Don't do} 22... Qxb2 23. Rd1) 23. Rxg7+ $2 (23. h6 g6 24. Rd1) 23... Kxg7 {Black is clearly winning.} 24. Rg1+ Kh8 25. Qh6 f5 {[%mdl 64] Pin.  Weighted Error Value: White=1.17/Black=0.14} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.9"]
[White "Zavarsky, Juraj"]
[Black "Wollner, Bohus"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1975"]
[BlackElo "1107"]
[Annotator "TA"]
[PlyCount "35"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,35,39,11,46,23,33,7,43,37,36,33,81,59,97,40,343,352,347,347,400,402,395,402,464,458,562,554]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 d6 5. Nc3 Nf6 6. h3 h6 {C50: Hungarian Defence and Giuoco Pianissimo.} 7. Be3 O-O {[#]} 8. Bb3 $146 ({Predecessor:} 8. O-O Kh8 9. dxe5 Nxe5 10. Nxe5 dxe5 11. f3 c6 12. Qxd8 Bxd8 13. Bc5 Bb6 14. Bxb6 axb6 15. Rad1 {½-½ (66) Anisimova,A (1200)-Ryzhova,M (1074) Bryansk 2019}) 8... Qe8 {The position is equal.} 9. O-O a5 10. Re1 b6 11. a4 Ba6 12. Nd5 (12. Nh4 $16) 12... Bb7 $2 {[%mdl 8192] This move loses the game for Black.} (12... Nxd5 $14 13. exd5 Nxd4) 13. Nxc7 $18 {[%mdl 64] [#] Double Attack} Qd8 14. Nxa8 Bxa8 15. dxe5 dxe5 16. Qxd8 Rxd8 17. Bxb6 Rb8 18. Bc7 {[%mdl 64] Double Attack.  Weighted Error Value: White=0.14/Black=0.78} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.18"]
[Round "1.10"]
[White "Bortnik, Timur"]
[Black "Moya Albaladejo, Jose Antonio"]
[Result "1/2-1/2"]
[ECO "C88"]
[BlackElo "1923"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,58,0,9,0,0,6,18,-42,0,0,34,31,37,-12,-16,-22,0,0,132,136,135,106,164,62,69,60,188,187,193,185,173,121,127,112,120,0,110,0,104,0,113]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 b4 9. c3 d5 10. exd5 Nxd5 11. Nxe5 {C88: Closed Ruy Lopez: Anti-Marshall Systems.} Nxe5 12. Rxe5 c6 13. d3 ({Better is} 13. d4 $11) 13... Bd6 (13... Bf6 $5 {[%cal Rf6e5]} 14. Re2 Bg4 $11) 14. Re1 Qh4 15. g3 Qh3 {[#] ...Bg4 is the strong threat.} 16. Bxd5 $146 ({Predecessor:} 16. Re4 Nf6 17. Rh4 Qf5 18. Bf4 g5 19. Bxd6 gxh4 20. Bxf8 hxg3 21. fxg3 Kxf8 22. Qf1 {1-0 (46) Martinez,J (1682)-Loaiza Valdes,C (1595) Santander 2011}) 16... cxd5 17. Qf3 Bg4 18. Qxd5 Rae8 {[#]} 19. Rxe8 $1 $16 Rxe8 {[%cal Re8e1]} 20. Be3 Bf4 {[#]} 21. cxb4 ({Don't take} 21. gxf4 h6 $18) (21. Nd2 $1 $18 Bxe3 22. fxe3) 21... Bxe3 22. fxe3 $40 {[%mdl 128] aiming for Nc3. White mounts an attack.} Qh6 (22... h6 $1 $14) 23. Qd4 $18 Qxe3+ 24. Qxe3 Rxe3 {KRB-KRN} 25. b5 (25. Nc3 $18) 25... Re1+ $16 26. Kf2 Re2+ 27. Kg1 {Black must now prevent Nc3.} Re1+ 28. Kf2 Re2+ 29. Kg1 {Threatens to win with Nc3.} Re1+ {Weighted Error Value: White=0.35/Black=0.49} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.1"]
[White "Anfinogenov, Artem"]
[Black "Obodchuk, Andrei"]
[Result "0-1"]
[ECO "E73"]
[WhiteElo "2032"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "142"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,142,49,43,43,17,7,6,19,6,26,-102,0,-87,-91,-118,-32,-54,-12,-15,0,-20,-10,0,10,8,84,84,86,77,95,69,90,77,107,91,86,80,166,174,274,262,326,320,325,333,305,301,387,378,382,380,490,459,652,214,210,212,193,8,169,178,179,-29,-27,-35,-77,-133,-116,-124,0,0,0,0,0,0,0,0,0,-244,-231,-222,-222,-222,-221,-186,-169,-600,-589,-2304,-2317,-1924,-1706,-1238,-1130,-29986,-29987,-29983,-29967,-29965,-29966,-29966,-29958,-29949,-24,-29966,-29963,-29962,-29964,-29970,-29969,-29971,-29970,-29970,-29972,-29972,-29972,-29976,-29965,-29955,0,-29976,-29977,-29976,-7138,-29956,-29956,-29961,-29965]} 1. c4 g6 2. d4 Bg7 3. e4 d6 4. Nc3 Nf6 5. Be2 O-O 6. Bg5 Na6 7. h4 h6 8. Be3 e5 9. d5 Nc5 {E73: King's Indian: Averbakh Variation without 6...c5.} 10. f3 Nh5 11. g4 Nf4 {The position is equal.} 12. Bf1 {[#]} f5 $146 ({Predecessor:} 12... a5 13. Bxc5 dxc5 14. Nge2 Bf6 15. h5 Bg5 16. Nxf4 Bxf4 17. Bd3 Bd7 18. Qe2 a4 {0-1 (112) Mohammad,S (2319)-Al Modiahki,M (2490) Teheran 2001}) 13. b4 (13. Bxc5 $11 dxc5 14. gxf5) 13... Na6 (13... fxe4 $1 $17 14. bxc5 exf3) 14. Rb1 (14. gxf5 $1 $11 {keeps the balance.} gxf5 15. Qb3) 14... fxg4 $17 15. fxg4 Qd7 (15... Bf6 $17 16. Kd2 Bxh4) 16. g5 $15 hxg5 17. hxg5 Qe7 18. Nh3 Rf7 19. Kd2 Bd7 20. Qe1 Raf8 (20... Bg4 $11) 21. Qh4 $16 Nh5 22. Be2 Rf4 23. Bxf4 ({Inferior is} 23. Nxf4 exf4 24. Bf2 (24. Bxa7 f3 $17) 24... f3 $17) 23... exf4 24. Bxh5 gxh5 25. Qxh5 {Hoping for g6.} Qe5 26. Qf3 {aiming for Ne2.} (26. Rhc1 $2 Qd4+ 27. Ke1 Qe3+ 28. Qe2 Bxc3+ 29. Rxc3 Qxc3+ $19) 26... Bg4 27. Qd3 $18 f3 (27... c5 {was necessary.}) 28. Nf2 $1 {[%cal Rf2g4]} Qxg5+ 29. Kc2 Bd7 30. a3 Qe5 31. Rbg1 Nb8 32. Qe3 Rf7 33. Rg5 Qe7 34. Rhg1 Kf8 (34... Bc8 $142 35. Nb5 Qf6) 35. Ng4 $2 (35. Qxa7 Qd8 36. Qxb7) 35... Bxg4 36. R5xg4 Nd7 37. Qh6 $2 Nf6 $2 {[#]} (37... Qe5 $1 $11 38. Rxg7 Rxg7) 38. Rxg7 $1 {[%mdl 512]} Rxg7 39. Rxg7 ({White must play} 39. Rf1 $1 $18) 39... Qxg7 $11 40. Qxg7+ ({Don't go for} 40. Qf4 $2 Qg2+ 41. Kb3 Kg7 $19) 40... Kxg7 $18 {[%mdl 4096] Endgame KN-KN} 41. Kd3 (41. Kd2 $142) 41... Ng4 $17 42. Nb5 Ne5+ (42... Kf6 $17 {Strongly threatening ...Ke5.} 43. c5 Ke5 44. Nxc7 Nf2+ 45. Ke3 Nxe4 46. Kxf3 dxc5 47. bxc5 Nxc5) 43. Ke3 $11 Nxc4+ 44. Kxf3 a6 45. Nxc7 Kf6 46. a4 Ke5 47. Ne8 $2 (47. a5 $11) 47... Nd2+ $19 {[%mdl 64] Double Attack} 48. Ke3 Nxe4 49. Kd3 Kxd5 50. Nc7+ Ke5 51. Kc4 $2 (51. a5) 51... Nf6 52. b5 a5 53. b6 d5+ $1 54. Kb5 d4 $1 {[%cal Rd4d3] ( -> ...d3)} 55. Kxa5 d3 56. Nb5 Nd5 57. Na3 Kd4 58. Nb1 Kc5 59. Nd2 {[#]} Nxb6 $2 (59... Nf6 $1 {mates} 60. Nb3+ Kc4 61. Nd2+ Kc3 62. Nf1 d2 63. Nxd2 Kxd2 64. Kb5 Nd7 65. a5 Nb8 66. Kb4 Na6+ 67. Ka4 Kc2 68. Ka3 Kc3 69. Ka4 Kc4 70. Ka3 Kb5 71. Kb3 Kxa5 72. Kc4 Kxb6 73. Kd5 Kb5 74. Kd4 Kb4 75. Kd3 Kc5 76. Ke4 b5 77. Kf4 Kd4 78. Kf3 Nc5 79. Kg4 b4 80. Kh5 b3 81. Kg6 b2 82. Kg5 b1=Q 83. Kg4 Qg6+ 84. Kf3 Ne4 85. Ke2 Qg2+ 86. Ke1 Qd2+ 87. Kf1 Qf2#) 60. Ne4+ $2 {[%mdl 8192]} (60. Nb3+ $11 Kc6 61. Kb4) 60... Kd4 61. Nf2 Nd5 62. Kb5 d2 63. a5 Nc3+ 64. Kb4 Ne4 65. Nd1 Kd3 66. Kb3 Nc5+ 67. Kb4 Ne4 68. Kb3 Ke2 69. Nb2 Nd6 (69... Nf2 $142 70. Kc4 {[#]} Nd3 $1 {[%mdl 576] Deflection, Promotion} 71. Nxd3 d1=Q 72. Nc5 Qc1+ 73. Kb5 Qb1+ 74. Kc4 Ke3 75. a6 Qa2+ 76. Kb5 Qb2+ 77. Kc4 bxa6 78. Kd5 Qd4+ 79. Kc6 Qc4 80. Kd6 a5 81. Nd7 a4 82. Nf6 a3 83. Nd5+ Kd4 84. Nf4 a2 85. Ke7 a1=Q 86. Ne6+ Ke4 87. Nc5+ Qxc5+ 88. Kf7 Qae5 89. Kg8 Qg1+ 90. Kh7 Qh5#) 70. Kb4 Nf7 71. Kc5 Ne5 {Black used his chance.  Weighted Error Value: White=0.98/Black=0.41} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.2"]
[White "Gurbanov, Andrei"]
[Black "Zavarsky, Juraj"]
[Result "1-0"]
[ECO "D34"]
[WhiteElo "2252"]
[BlackElo "1975"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,73,19,19,23,1,11,6,8,3,35,22,32,23,108,112,121,124,115,119,123,114,95,42,46,47,51,39,70,65,86,86,129,127,166,131,123,129,129,133,151,147,235,217,292,269,500,472,1480,309]} 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 Bxc5 10. Bg5 d4 11. Bxf6 Qxf6 12. Ne4 Qe7 13. Nxc5 Qxc5 14. Rc1 Qb6 {D34: Tarrasch Defence: 6 g3 Nf6 7 Bg2 Be7.} 15. b3 Bg4 16. Qd2 Rad8 {The position is equal.} 17. Rfd1 {[#]} Bh5 $146 ({Predecessor:} 17... Rfe8 18. Qf4 Bh5 19. Rd2 Bg6 20. Nh4 d3 21. e3 Qa5 22. Rcd1 Bh5 23. Nf3 Nb4 {0-1 (30) Barria,B (2099)-Franco Valencia,A (2226) Medellin 2015}) 18. Qg5 Bg6 19. Nh4 d3 (19... Rfe8 $11) 20. Bxc6 $16 {Threatens to win with Bf3.} bxc6 21. Nxg6 fxg6 {[#]} 22. e3 $1 Rf6 23. Qc5 Rfd6 24. Qxb6 (24. Rd2 $16) 24... axb6 {[%mdl 4096] Endgame KRR-KRR} 25. Rd2 g5 26. g4 c5 27. Rc3 Rd5 28. f3 b5 29. e4 b4 30. Rc1 Re5 31. Kf2 Kf7 32. Ke3 Ke7 33. Rxd3 Rxd3+ (33... Rc8 $16 34. f4 gxf4+ 35. Kxf4 Ke6) 34. Kxd3 $18 Kd6 35. Kc4 h5 $2 {[#]} (35... g6 {was worth a try.} 36. Rd1+ Kc6) 36. Rd1+ Ke6 (36... Kc7 $142 37. Rd5 Re7 38. Rxc5+ Kd8 39. Rxg5 hxg4 40. Rxg4 Ra7) 37. h3 $2 {Weighted Error Value: White=0.06/Black=0.37} (37. Rd5 hxg4 38. Rxe5+ Kxe5 39. fxg4) 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.3"]
[White "Tsapalin, Sergey"]
[Black "Gedgafov, Chamal"]
[Result "1/2-1/2"]
[ECO "B41"]
[WhiteElo "1981"]
[BlackElo "2202"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,107,45,52,37,57,50,55,62,76,64,110,100,118,90,88,89,85,54,60,57,52,21,31,11,27,9,35,-11,-8,-7,0,0,0,0,0,0,0,-47,-41,-76,-79,-86,-75,-81,-37,-94,-84,-162,-166,-156,-154,-162,-161,-163,-157,-150,-137,-131,-125,-202,-150,-137,-142,-122,-42,-128,-52,-60,-35,-53,0,0,0,0,0,0,0,0,0,0,0,-11,-15,-72,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 e6 2. Nc3 c5 3. e4 Nc6 4. Nf3 a6 5. a3 Qc7 6. d4 cxd4 7. Nxd4 Nf6 8. Be2 {B41: Sicilian: Kan Variation: 5 c4.} b6 {was the old line (8...Be7).} 9. Be3 Bb7 10. O-O {White is slightly better.} h5 {[#]} 11. h3 $146 ({Predecessor:} 11. f4 Nxd4 12. Qxd4 Bc5 13. Qd3 Ng4 14. Bxg4 hxg4 15. b4 Bxe3+ 16. Qxe3 f6 17. Na4 {½-½ (36) Naiditsch,Y-Kalinina,M Vinnytsia 2007}) 11... Ne5 {[#]} 12. f4 $1 {[%cal Rf4e5]} Ng6 13. e5 Ne4 14. Nxe4 Bxe4 15. Bf3 Qb7 16. Bxe4 (16. Qc2 {feels hotter.} Bxf3 17. Nxf3 Ne7 18. Nd4 g6 19. Rac1) 16... Qxe4 17. Qf3 Qxf3 18. Rxf3 f6 19. exf6 gxf6 20. Nb3 Nh4 21. Rf2 Nf5 22. Bxb6 Rb8 23. c5 Bxc5 {[%mdl 64] [#] Remove Defender} 24. Nxc5 Rxb6 25. Rd1 d5 26. Re2 {aiming for Rxd5.} Kf7 27. Rde1 {[%cal Rc5e6]} Re8 28. b4 Rc6 29. Rd1 (29. g4 $15 Nd4 30. Rf2) 29... a5 $17 30. g4 (30. Rc1 $17) 30... hxg4 $19 31. hxg4 Rg8 32. g5 fxg5 33. fxg5 Rxg5+ 34. Kf2 axb4 35. axb4 Rh5 36. Nd3 (36. Re5 $17 {might work better.}) 36... Rh2+ 37. Ke1 Rxe2+ 38. Kxe2 $17 {[%mdl 4096] Endgame And now Ne5+ would win. KRN-KRN} Kf6 ({Better is} 38... Rc2+ $17 39. Rd2 Nd4+ 40. Ke3 Rxd2 41. Kxd2 Kf6) 39. Rb1 (39. Nc5 $15) 39... e5 (39... Rc2+ $17 40. Kf1 Rd2) 40. Kd2 $15 e4 41. b5 Rb6 (41... Rc8 $1 $15 42. Nb4 d4) 42. Nc5 $11 {Hoping for Nd7+.} Ke7 43. Na4 Rb8 (43... Rh6 $5) 44. b6 Kd7 45. Rb5 Kc6 (45... e3+ {is more complex.} 46. Kd3 e2 47. Rb1 Ng3 48. Kd2 Re8) 46. Rc5+ Kd6 47. Rb5 Nd4 48. Rb1 (48. Rb4 $11 {keeps the balance.} e3+ 49. Kd3) 48... Nc6 (48... Nf3+ $17 49. Ke2 Nd4+ 50. Kd2 Nf3+ 51. Ke2 Nd4+ 52. Kd2) 49. Nc3 {The position is equal.} Rh8 50. Rb5 Rh2+ 51. Kd1 Rh1+ 52. Kd2 Rh2+ 53. Kd1 Rh1+ 54. Kd2 {White happily takes the draw.  Weighted Error Value: White=0.16/Black=0.13} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.4"]
[White "Glazar, Domagoj"]
[Black "Dubov, Pavel"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "2142"]
[Annotator "NA"]
[PlyCount "81"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Bb4 6. Qa4+ Nc6 7. Nf3 Bxc3+ 8. bxc3 O-O 9. e3 h6 10. Bh4 Re8 11. Bd3 Bg4 12. Nd2 a6 13. O-O g5 14. Bg3 Qc8 15. Qc2 Ne4 16. Nxe4 dxe4 17. Bxe4 f5 18. Bd3 Rf8 19. f4 Qe6 20. Rae1 Rae8 21. fxg5 hxg5 22. h3 f4 23. exf4 Qd7 24. Rxe8 Rxe8 25. hxg4 Qxg4 26. Qf2 Rf8 27. f5 b5 28. Qf3 Qxf3 29. Rxf3 b4 30. Be4 Na5 31. cxb4 Nc4 32. Bd5+ Kg7 33. Bxc4 g4 34. Rf4 Kh8 35. f6 c6 36. f7 Kh7 37. Rxg4 Kh6 38. Rg8 Rxg8 39. fxg8=Q c5 40. Bf4+ Kh5 41. Qg5# 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.5"]
[White "Petrov, Maksim"]
[Black "Zakharova, Evgeniya"]
[Result "1/2-1/2"]
[ECO "B11"]
[WhiteElo "1568"]
[BlackElo "2045"]
[Annotator "NA"]
[PlyCount "61"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bh5 5. exd5 cxd5 6. Bb5+ Nc6 7. g4 Bg6 8. Ne5 Qd6 9. d4 a6 10. Bxc6+ bxc6 11. Bf4 Qe6 12. Na4 f6 13. Nc5 Qc8 14. Ned7 Ra7 15. Nxf8 Kxf8 16. Qe2 Bf7 17. Qd2 g5 18. Bg3 h5 19. O-O-O hxg4 20. hxg4 Rxh1 21. Rxh1 Qxg4 22. Qa5 Ra8 23. Qc7 Qc8 24. Qxc8+ Rxc8 25. Rh7 Bg6 26. Ne6+ Ke8 27. Rg7 Bf7 28. Nc7+ Kf8 29. Rh7 Bg6 30. Ne6+ Ke8 31. Rg7 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.6"]
[White "Moya Albaladejo, Jose Antonio"]
[Black "Valenta, Vit Vaclav"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "1923"]
[BlackElo "2028"]
[Annotator "NA"]
[PlyCount "95"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 d6 5. dxe5 dxe5 6. Qxd8+ Bxd8 7. Nc3 Nf6 8. Be3 Bg4 9. O-O-O a6 10. h3 Bh5 11. g4 Bg6 12. Nh4 Bxe4 13. Rhe1 Bg6 14. f4 exf4 15. Bc5+ Be7 16. Rxe7+ Nxe7 17. Re1 O-O-O 18. Bxe7 Rd4 19. Bb3 Ne4 20. Nxg6 hxg6 21. Nxe4 Re8 22. c3 Rd7 23. Bh4 Kb8 24. Nc5 Rxe1+ 25. Bxe1 Re7 26. Nd3 g5 27. Kd2 f6 28. Bf2 b6 29. Bd5 g6 30. Bf3 Rh7 31. Bg2 Kc8 32. Bd4 f5 33. Ne5 c5 34. Bg1 Rg7 35. Nf3 Rd7+ 36. Kc2 Re7 37. Bf1 Rb7 38. Bf2 fxg4 39. hxg4 Rh7 40. Bd3 Rh3 41. Bxg6 Kc7 42. Be4 Kd6 43. Kd2 a5 44. Ke2 Rh1 45. Bg1 Ke7 46. Kf2 Rh3 47. Nxg5 Re3 48. Bh2 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.7"]
[White "Vasquez, Georges"]
[Black "Bortnik, Timur"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "1864"]
[Annotator "NA"]
[PlyCount "53"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. Bf4 e6 3. e3 g6 4. Nf3 Bg7 5. h3 d6 6. Be2 O-O 7. c3 Nbd7 8. O-O Nh5 9. Bh2 f5 10. Nbd2 b6 11. a4 a5 12. Qb3 Re8 13. Rad1 Nhf6 14. Rfe1 Bb7 15. Bd3 Kh8 16. e4 fxe4 17. Ng5 Qe7 18. Ngxe4 Rf8 19. Ng5 Bd5 20. c4 Nh5 21. cxd5 Bxd4 22. Ndf3 Nc5 23. Qc2 Rxf3 24. Nxf3 Rf8 25. Nxd4 Qh4 26. Nxe6 Nxd3 27. Rxd3 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.8"]
[White "Pilimon, Zbigniew"]
[Black "Nazarov, Nicolai"]
[Result "1/2-1/2"]
[ECO "D31"]
[WhiteElo "1638"]
[BlackElo "1770"]
[Annotator "NA"]
[PlyCount "157"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. c4 e6 3. Nf3 dxc4 4. e4 b5 5. Nc3 c6 6. a4 Bb4 7. Bd2 Bxc3 8. Bxc3 Nf6 9. Qc2 Qb6 10. b3 b4 11. Bd2 cxb3 12. Qb1 a5 13. Bd3 Ba6 14. O-O Bxd3 15. Qxd3 Qa6 16. Qe3 O-O 17. Rab1 Nbd7 18. Rxb3 Qc4 19. Rc1 Qa6 20. h3 Rac8 21. g4 Nb6 22. Ne5 Nxa4 23. g5 Nh5 24. Qf3 g6 25. Ng4 Kh8 26. Nf6 Ng7 27. h4 Qa7 28. h5 gxh5 29. Qh1 Qxd4 30. Be3 Qd8 31. Nxh5 Nxh5 32. Qxh5 Rg8 33. Rd1 Qe7 34. Rbd3 Nc5 35. Rd4 f6 36. Rc4 Nd7 37. f4 fxg5 38. fxg5 Ne5 39. Rc5 Qf7 40. Qxf7 Nxf7 41. Rxa5 c5 42. Rd7 Nxg5 43. Bc1 Nxe4+ 44. Kh2 Rg7 45. Bb2 Nc3 46. Rd3 Rf7 47. Bxc3+ bxc3 48. Rxc3 Rf5 49. Ra7 h6 50. Rd3 Rh5+ 51. Kg3 Rg8+ 52. Kf2 Rf5+ 53. Ke1 Rg7 54. Ra8+ Kh7 55. Rdd8 Re5+ 56. Kf2 Rf7+ 57. Kg3 Kg6 58. Kh4 Re4+ 59. Kg3 c4 60. Rac8 h5 61. Rg8+ Kf6 62. Rc5 e5 63. Kf3 Rd4 64. Rc6+ Kf5 65. Rcg6 h4 66. Rg5+ Ke6+ 67. Ke3 Rd3+ 68. Ke2 Rd4 69. Ke3 Rd3+ 70. Ke2 h3 71. Re8+ Re7 72. Rxe7+ Kxe7 73. Rxe5+ Kd6 74. Rg5 Rb3 75. Kf2 h2 76. Kg2 Rb2+ 77. Kh1 c3 78. Rd5+ Kc6 79. Rc5+ 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.9"]
[White "Kaydanovich, Marina"]
[Black "Kimsanboyev, Axadxon"]
[Result "1/2-1/2"]
[ECO "A17"]
[WhiteElo "1737"]
[BlackElo "1636"]
[Annotator "NA"]
[PlyCount "63"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Nf3 Nf6 3. g3 Bf5 4. Bg2 e6 5. c4 c6 6. Nc3 Nbd7 7. cxd5 exd5 8. O-O Be7 9. Nh4 Be6 10. Qd3 O-O 11. Nf5 Re8 12. Nxe7+ Qxe7 13. Bd2 Nb6 14. b3 Qd7 15. e4 dxe4 16. Nxe4 Nxe4 17. Bxe4 f5 18. Bg2 Bd5 19. Rfe1 Bxg2 20. Kxg2 Qd5+ 21. f3 Kf7 22. Qc3 Rad8 23. Be3 Rd6 24. Rad1 Rde6 25. Bf2 Rxe1 26. Rxe1 Rxe1 27. Qxe1 a6 28. Qb4 Qb5 29. Qd6 Nd5 30. Qe5 Qd3 31. Qb8 Qb5 32. Qe5 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.19"]
[Round "2.10"]
[White "Wollner, Bohus"]
[Black "Aleksandrova, Aleksandra"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "1107"]
[BlackElo "1728"]
[Annotator "NA"]
[PlyCount "50"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Nf3 Nd7 3. c4 e6 4. Nc3 c6 5. e3 Bd6 6. Be2 a5 7. O-O f5 8. Bd3 g6 9. Bd2 Qe7 10. Re1 Ngf6 11. c5 Bc7 12. a3 Ng4 13. g3 e5 14. Nxe5 Ngxe5 15. dxe5 Nxc5 16. f4 Nxd3 17. Rf1 Nxb2 18. Qc2 Nc4 19. Bc1 b5 20. Ne2 Bd7 21. Nd4 c5 22. Nf3 a4 23. Qd3 Bc6 24. Ng5 Nxe5 25. fxe5 Bxe5 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.1"]
[White "Obodchuk, Andrei"]
[Black "Gurbanov, Andrei"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "2303"]
[BlackElo "2252"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,91,17,14,20,8,69,41,52,46,58,42,51,50,53,66,64,56,55,46,48,45,41,37,50,42,43,31,63,44,64,58,78,48,41,39,46,37,54,51,58,41,56,6,22,17,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,72,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bb4+ 5. c3 Bc5 6. Be3 Bb6 7. Nf5 Bxe3 {C45: Scotch Game.} 8. Nxe3 ({But not} 8. fxe3 g6 $15) 8... Nge7 (8... Nf6 $11) 9. c4 d6 {White is slightly better.} 10. Bd3 O-O 11. Nc3 Kh8 12. O-O f5 13. f4 Be6 14. exf5 Nxf5 15. Nxf5 Bxf5 16. Bxf5 Rxf5 {[#]} 17. Qd3 $146 ({Predecessor:} 17. Nd5 Ne7 18. Qd3 Nxd5 19. Qxf5 Ne3 20. Qe4 Nxf1 21. Rxf1 c6 22. Qd4 Qb6 23. Rd1 {1-0 (59) Yildiz Kadioglu,B (2330)-Sengul,C (2194) Konya 2012}) 17... Rf7 18. Nd5 Ne7 19. Rae1 Ng6 20. Qd4 Qf8 21. g3 Ne7 22. Re2 (22. Nxc7 $2 Nf5 $19) 22... Nf5 23. Qd3 c6 24. Ne3 Nxe3 25. Qxe3 h6 26. Rd1 a6 27. Qd3 Rd8 28. Re6 {[%cal Re6d6]} Rf6 29. Rxf6 Qxf6 $11 {[%mdl 4096] Endgame KQR-KQR} 30. Qd4 Qe7 31. Kf2 d5 32. Rd2 c5 33. Qd3 d4 34. Re2 Qd7 35. Re5 b6 36. b3 a5 37. Qe4 Qf7 (37... Qh3 $11 {remains equal.}) 38. Ke1 ({Better is} 38. a4 $16) 38... a4 $1 {The position is equal.} 39. g4 axb3 40. axb3 Rf8 41. f5 Qf6 42. Re8 Rxe8 43. Qxe8+ Kh7 {And now ...Qh4+ would win.} 44. Qe4 Kh8 45. Qe8+ Kh7 {Strongly threatening ...Qh4+.} 46. Qe4 {Weighted Error Value: White=0.08/Black=0.10} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.2"]
[White "Gedgafov, Chamal"]
[Black "Glazar, Domagoj"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2202"]
[BlackElo "2142"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,97,26,37,12,20,0,21,-18,-3,-11,-4,-4,-1,-12,-8,-12,-16,-45,-61,-64,-60,-117,-123,-171,-174,-157,-65,-62,-60,-81,0,-37,205,204,279,280,414,475,436,415,1288,1237,1777,1619,1173,881,832,830,723,595,581,473,649,603,687,690,996,978,984,852,1750,1073,1693,1446,1343,1271,29993,29994,29994,29983,29983,29983,29994,29995,29995,29996,29996,29997]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Nf3 Qa5 9. Qd2 O-O 10. Rc1 Nc6 11. d5 Rd8 12. Be2 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} e6 13. c4 Qxd2+ 14. Kxd2 {The position is equal.} (14. Bxd2 {seems wilder.} Nd4 15. Nxd4 Bxd4 16. O-O b5 17. Be3) 14... b6 15. Rhd1 Nb4 16. a3 {[#]} Nc6 $146 ({Predecessor:} 16... Na6 17. Ke1 Bd7 18. e5 Ba4 19. Rd2 Rd7 20. d6 Rad8 21. Bd3 Nb8 22. Bc2 Bxc2 23. Rcxc2 Nc6 24. Ke2 Nxe5 25. Nxe5 Bxe5 {0-1 (25) Shi,T-Baskin,R (2390) Lichess.org INT 2020}) 17. Ke1 exd5 18. cxd5 Na5 19. Bg5 Re8 20. e5 Bd7 21. Kf1 ({Better is} 21. Bf4 $15) 21... h6 $17 22. Bf6 Bxf6 23. exf6 Bg4 (23... Rad8 $17 24. Rc3 Ba4) 24. Rc3 Rad8 25. Re3 Bxf3 ({Black should try} 25... Rxe3 $17 26. fxe3 Rd6) 26. gxf3 c4 $2 {[#] This costs Black the game.} (26... Rxe3 $1 $15 27. fxe3 Rd6) 27. Re7 $1 $18 Rc8 {next ...Red8 is good for Black.} 28. d6 {Strongly threatening d7!} ({Worse is} 28. Rxa7 Red8 $11) 28... Red8 (28... Rf8 $142 29. d7 (29. Rxa7 Rc6 $16) 29... Ra8) 29. d7 Rb8 30. f4 b5 (30... c3 $142 31. Rc1 Nb7 32. Rxc3 Nc5) 31. Bf3 Rf8 32. Bd5 Rbd8 33. Ke2 Nb3 34. Rg1 Nd4+ 35. Ke3 {White threatens Rxg6+ and mate.} Nf5+ 36. Ke4 {White wants to mate with Rxg6+.} Kh8 37. Bc6 a5 38. Kd5 c3 39. Bxb5 Rb8 40. a4 Rb6 41. Kc5 Rd6 42. Rge1 c2 43. Re8 Rd1 44. Rxf8+ {White mates.} Kh7 {[#]} 45. Rxd1 $3 {[%mdl 576] Promotion} cxd1=Q 46. d8=Q {[%csl Gd8][%cal Rf8h8]} Qc2+ 47. Kb6 {[%csl Gd8][%cal Rf8h8]} Qxf2+ 48. Ka6 {[%csl Gd8][%cal Rf8h8]} g5 49. Qd7 {[%cal Rd7f5] Weighted Error Value: White=0.22/Black=0.64} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.3"]
[White "Zakharova, Evgeniya"]
[Black "Moya Albaladejo, Jose Antonio"]
[Result "1/2-1/2"]
[ECO "D95"]
[WhiteElo "2045"]
[BlackElo "1923"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,82,39,36,0,0,0,0,-4,0,0,50,45,89,86,88,78,120,118,118,118,131,118,118,118,118,118,127,118,118,118,116,117,137,137,195,188,193,177,133,103,97,41,32,25,158,174,188,188,187,183,182,182,181,177,181,181,173,171,140,142,143,100,98,91,70,32,82,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Qb3 dxc4 6. Bxc4 O-O 7. Nf3 c5 $1 {[%mdl 4] is currently scoring better than 7...Nc6.} 8. Ne5 {[%cal Re5f7] D95: Grünfeld: 4 Nf3 Bg7 5 e3 0-0 6 Qb3.} e6 9. dxc5 {[#]} Nd5 $146 ({Predecessor:} 9... Nfd7 10. Nxd7 Nxd7 11. c6 Ne5 12. O-O Nxc6 13. Rd1 Qe7 14. Bb5 Na5 15. Qa4 b6 {0-1 (33) Jovanic,O (2464)-Vachier Lagrave,M (2577) Paris 2006}) 10. Bxd5 exd5 11. Nf3 Qa5 12. O-O Qxc5 13. Nxd5 Be6 14. e4 Nc6 15. Be3 Nd4 16. Nxd4 Bxd4 17. Rac1 ({But not} 17. Qxb7 $6 Bxe3 18. Nxe3 (18. fxe3 Bxd5 19. Qxd5 Qxe3+ 20. Rf2 Rae8 $11) 18... Rfb8 $11) 17... Bxd5 18. exd5 Qb6 19. Bxd4 Qxd4 20. Rfd1 Qb6 21. Qxb6 axb6 $16 {[%mdl 4096] Endgame KRR-KRR} 22. a3 Rac8 23. Kf1 Rfd8 (23... Kg7 $16 24. d6 Rxc1 25. Rxc1 Rd8) 24. Rxc8 $18 Rxc8 {KR-KR} 25. Ke2 Kf8 26. Ke3 Ke7 27. b4 (27. Rd3 $16) 27... Kd6 28. Rd3 Re8+ (28... f5 $11 {keeps the balance.}) 29. Kd4 $1 $16 Re2 30. Rf3 f5 31. Kc4 Rd2 32. Kb5 Kc7 {[#]} 33. Rc3+ $1 Kb8 34. Kxb6 {Black must now prevent Rc7.} Rxd5 35. Re3 {Threatening mate with Re8+.} Rd6+ 36. Kc5 Rd2 37. b5 {Strongly threatening Re8+.} Ka7 38. Rf3 Rc2+ 39. Kb4 Rb2+ {[#]} 40. Kc4 ({White should try} 40. Ka5 $1 $16) 40... Kb6 $11 41. h4 Rxb5 {Weighted Error Value: White=0.09/Black=0.15} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.4"]
[White "Petrov, Maksim"]
[Black "Tsapalin, Sergey"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1568"]
[BlackElo "1981"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,90,-5,-14,6,0,-1,-9,-17,-22,0,0,10,-12,18,22,26,17,25,-10,-12,-10,-4,-30,35,40,98,-83,-80,-77,-83,-83,-81,-81,-81,-81,-81,-81,-80,-69,-68,-115,-106,-240,-237,-362,-361,-350,-323,-448,-427,-790,-764,-781,-772,-567,-432,-1145,-1226,-1169,-1030,-1166,-813,-1402,-1391,-1587,-1445,-12842,-12842,-12840,-12840,-12845,-12843,-527,0,-12845,-12843,-12849,-12848,-12850,-27999,-27999,-27998]} 1. e4 c5 2. Nc3 d6 3. Bc4 Nf6 4. d3 Nc6 5. f4 e6 6. Nf3 d5 {B23: Closed Sicilian: Lines without g3.} 7. Bb3 Be7 8. O-O O-O {The position is equal.} 9. Qe1 dxe4 10. dxe4 Nd4 11. Be3 Ng4 12. Bxd4 cxd4 {[#]} 13. Rd1 $1 {[#]} Qb6 $146 ({Predecessor:} 13... b5 14. Kh1 Qb6 15. Nxd4 Bc5 16. h3 Bxd4 17. hxg4 e5 18. f5 Qh6+ {0-1 (18) O'Rourke,W-Gravett,A (1975) Caleta 2005}) 14. Na4 ({Reject} 14. Rxd4 Bc5 $17) 14... Qc7 {And now ...b5 would win.} 15. Nxd4 e5 16. fxe5 Qxe5 ({Better is} 16... b5 $1 $11 17. Nc3 Qxe5) 17. Nf3 $14 Qc7 (17... Qf4 $14) 18. Qc3 $2 (18. Kh1 $16 {keeps the pressure on.}) 18... Qxc3 $17 19. Nxc3 Bc5+ 20. Kh1 Ne3 21. Ng5 {[%cal Rf1f7]} Nxf1 22. Rxf1 {[%cal Rg5f7]} Be6 $1 23. Nxe6 fxe6 24. Bxe6+ Kh8 {[%cal Rf8f1]} 25. Rf5 {Black keeps a firm grip on the game.} Rxf5 (25... Bd4 {seems wilder.} 26. Nd1 Rxf5 27. exf5 Rd8 28. g3 Bf6) 26. Bxf5 {[%mdl 4096] Endgame [#] KRB-KBN} (26. exf5 $17 Bd4 27. Ne4) 26... Rf8 $1 $19 {...g6 is the strong threat.} 27. Na4 {[#]} (27. g3 $142) 27... g6 $1 28. Nxc5 gxf5 {KR-KN} 29. e5 {[#]} Rc8 $1 {[%cal Rc8c5]} 30. Nxb7 (30. b4 $142 b6 31. Nb7) 30... Rxc2 {[%cal Rc2c1]} 31. Kg1 Rxb2 32. Nd6 Kg7 33. Nxf5+ (33. a3 $142 Kg6 34. g3) 33... Kf7 34. a3 Ke6 35. Nd4+ Kd5 36. Nf3 h6 37. h3 Ra2 38. g4 Rxa3 39. Kf2 a5 {[%cal Ba7a5,Ba5a4][%mdl 32]} 40. h4 Ke4 41. Nd2+ Kd5 (41... Kf4 $142 42. e6 Re3) 42. Nf3 $1 a4 43. g5 hxg5 44. hxg5 Rxf3+ 45. Kxf3 Kxe5 {Weighted Error Value: White=0.72/Black=0.29} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.5"]
[White "Aleksandrova, Aleksandra"]
[Black "Anfinogenov, Artem"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1728"]
[BlackElo "2032"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,56,-68,11,0,9,-14,-14,-37,-38,-41,-28,-30,-27,-64,-45,-66,49,-92,-61,-158,-128,-195,-180,-310,-316,-396,-385,-379,-364,-789,-440,-566,-570,-751,-804,-813,-807,-815,-813,-802,-814,-797,-805,-770,-751,-781,-763,-944,-785]} 1. d3 d5 2. c3 c5 3. Qc2 e5 4. e4 Nc6 5. Be2 {[#]} f5 $146 (5... Nf6 $15) ({Predecessor:} 5... Be6 6. Nf3 Be7 7. O-O h6 8. Nbd2 Nf6 9. Re1 d4 10. Nf1 Qd7 11. Bd2 O-O {1-0 (36) Colombo,P (2161)-Baumgartner,H (2338) Dresden 2005}) 6. exd5 $11 {A00: Irregular Openings.} Qxd5 7. Bf3 Qe6 8. Nh3 {The position is equal.} Bd7 9. Na3 O-O-O 10. O-O h6 11. Re1 g5 12. Nc4 Bg7 (12... e4 $1 $15 13. Qb3 Nf6) 13. Kf1 (13. Be3 $14) 13... b5 {White is on the road to losing.} 14. Na3 {[#]} ({White should try} 14. Bxc6 $15 bxc4 15. Bxd7+ Rxd7 16. dxc4) 14... a6 $1 $17 15. Bd1 (15. Be2 $17) 15... Qd6 $19 16. Qe2 (16. f3 $142) 16... Nf6 17. f3 e4 18. dxe4 fxe4 19. fxe4 $2 (19. Kg1 exf3 20. Qxf3) 19... Bg4 {Black is clearly winning.} 20. Qf2 Bxd1 21. Bxg5 hxg5 22. Raxd1 Qxd1 23. Rxd1 Rxd1+ 24. Ke2 {[#]} Rd2+ $1 {[%mdl 576] Skewer, Decoy} 25. Kxd2 Nxe4+ {[%mdl 64] Double Attack} 26. Ke2 Nxf2 27. Kxf2 Bf6 28. Kg3 Kd7 {Weighted Error Value: White=0.75/Black=0.39} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.6"]
[White "Zavarsky, Juraj"]
[Black "Nikitskaya, Varvara"]
[Result "1/2-1/2"]
[ECO "C63"]
[WhiteElo "1975"]
[BlackElo "1173"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,90,21,19,64,41,49,-85,-72,-74,-79,-72,-71,-81,-44,-40,-40,-41,0,-18,0,0,21,0,18,0,0,0,2,5,4,2,3,-24,-20,-27,-22,-24,-5,-5,-2,-10,0,0,0,0,0,0,12,0,1,2,37,11,12,10,37,37,37,37,37,37,48,37,37,0,0,-19,37,37,37,37,37,37,37,30,30,30,37,30,37]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 Nf6 6. Nxf6+ Qxf6 7. O-O Bc5 {C63: Ruy Lopez: Schliemann/Jaenisch Defence.} 8. Bxc6 dxc6 9. Nxe5 Qxe5 $17 {Black is better.} 10. Re1 {[#]} Bxf2+ $1 11. Kxf2 O-O+ 12. Kg1 Qd4+ 13. Re3 $1 Bg4 14. Qe1 {[#]} Rf7 $146 (14... Rae8 $5 15. d3 Bd7 $15) ({Predecessor:} 14... Rf6 15. c3 Qb6 16. d4 Bh5 17. Re6 Raf8 18. Rxf6 Rxf6 19. Bg5 Rf7 20. Qe8+ Rf8 21. Qxh5 Qxb2 {1-0 (67) Andriasian,S-Nikolova,A Rimavska Sobota 1996}) 15. c3 Qf6 16. h3 Bh5 17. Re6 Qf5 18. Re5 Qg6 {Hoping for ...Raf8.} 19. d4 {With the idea Rg5.} Raf8 {[#] White must now prevent ...h6.} 20. Be3 ({Don't go for} 20. g4 $2 Bxg4 21. Be3 (21. hxg4 {leads to mate.} Qxg4+ 22. Kh2 Rf2+ 23. Qxf2 Rxf2+ 24. Kh1 Qg2#) 21... Bxh3+ 22. Rg5 Qc2 $19) 20... h6 {...Bf3 is the strong threat.} 21. Kh2 Rf5 22. Qg3 (22. Rxf5 {seems wilder.} Rxf5 23. Bf2 Rf4 24. Qd2 Qf7 25. Bg3) 22... Rxe5 23. Qxg6 Bxg6 24. dxe5 $11 {[%mdl 4096] Endgame KRB-KRB} Rf5 25. Bxa7 Rxe5 26. Rf1 Ra5 27. Bb8 Rxa2 28. Rf2 b5 29. Bxc7 c5 30. Bd6 c4 31. Ba3 Bf7 32. h4 Ra1 33. Rf5 Re1 34. Rxb5 Re4 35. Kg3 Be6 36. h5 Kf7 37. Rb7+ Kf6 38. Bc5 Rg4+ 39. Kf3 (39. Kf2 {feels hotter.} Rxg2+ 40. Ke3 Kf5 41. Bf8 Kf6 42. Rc7) 39... Bd5+ ({Black should try} 39... Kf5 $1 $11 40. Kf2 Bd5) 40. Kxg4 $14 Bxb7 {KB-KB} 41. Bd4+ Kf7 42. g3 g6 43. hxg6+ Kxg6 44. Kf4 Bc6 45. Ke5 Ba4 {Weighted Error Value: White=0.12/Black=0.13} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.7"]
[White "Dubov, Pavel"]
[Black "Vasquez, Georges"]
[Result "0-1"]
[ECO "B11"]
[BlackElo "1864"]
[Annotator "NA RC"]
[PlyCount "38"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c6 2. Nc3 d5 3. d3 e5 4. exd5 cxd5 5. Qh5 Nc6 6. Bg5 Qa5 7. g3 d4 8. Bd2 dxc3 9. Bxc3 Bb4 10. Bxb4 Qxb4+ 11. c3 Qxb2 12. Rd1 Qxc3+ 13. Ke2 Nf6 14. Qg5 O-O 15. Bg2 Bg4+ 16. f3 Bh5 17. g4 Bg6 18. Nh3 Rad8 19. f4 Bxd3+ 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.8"]
[White "Nazarov, Nicolai"]
[Black "Kaydanovich, Marina"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1770"]
[BlackElo "1737"]
[Annotator "NA RC"]
[PlyCount "42"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. cxd4 e6 6. a3 Be7 7. Nc3 Nxc3 8. bxc3 d6 9. f4 dxe5 10. fxe5 Bh4+ 11. g3 Qd5 12. Nf3 Bd8 13. Bd3 Ba5 14. Bd2 Bd7 15. O-O Bc6 16. c4 Qd8 17. Ng5 Qxd4+ 18. Rf2 Bxd2 19. Qxd2 Qxa1+ 20. Bf1 O-O 21. Nxf7 Nd7 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.9"]
[White "Bortnik, Timur"]
[Black "Pilimon, Zbigniew"]
[Result "1/2-1/2"]
[ECO "B20"]
[BlackElo "1638"]
[Annotator "NA RC"]
[PlyCount "28"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. b4 cxb4 3. a3 Nc6 4. axb4 e5 5. Nf3 Bxb4 6. c3 Be7 7. d4 exd4 8. cxd4 d5 9. Bb5 Bb4+ 10. Bd2 Bxd2+ 11. Nbxd2 Nge7 12. exd5 Qxd5 13. Bc4 Qh5 14. O-O O-O 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.20"]
[Round "3.10"]
[White "Kimsanboyev, Axadxon"]
[Black "Wollner, Bohus"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1636"]
[BlackElo "1107"]
[Annotator "NA RC"]
[PlyCount "47"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Bf4 Nc6 3. e3 Nf6 4. c4 e6 5. Nc3 a6 6. Nf3 h6 7. h3 Bb4 8. Qc2 O-O 9. Bd3 Bd6 10. Bxd6 Qxd6 11. a3 Qe7 12. cxd5 exd5 13. O-O Re8 14. Rac1 Qd6 15. Na4 Bd7 16. Nc5 Bc8 17. Nxa6 bxa6 18. Qxc6 Qxc6 19. Rxc6 Re7 20. Rfc1 Ra7 21. Ne5 Kf8 22. b4 Ne8 23. R6c5 Nd6 24. Nc6 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.1"]
[White "Tsapalin, Sergey"]
[Black "Obodchuk, Andrei"]
[Result "0-1"]
[ECO "E73"]
[WhiteElo "1981"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,120,32,8,54,59,54,47,54,68,66,38,49,45,59,40,41,35,38,43,50,43,96,100,101,76,85,58,175,179,192,179,210,193,224,231,221,217,244,223,225,136,149,118,239,250,248,210,238,138,128,131,151,0,0,0,27,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-100,-54,-82,0,-340,-310,-539,45,53,37,21,22,-5110,-4344,-29970,-10739,-29978,-29979,-29978,-29978,-29975,-29977,-29980,-29982,-29982,-29983,-29983,-29984,-29984,-29984,-29984,-29985,-29985,-29986]} 1. c4 g6 2. Nc3 Bg7 3. d4 d6 4. e4 Nf6 5. Be2 O-O 6. Bg5 Na6 7. h4 h6 8. Be3 e5 9. d5 Nc5 10. Qc2 h5 {E73: King's Indian: Averbakh Variation without 6...c5.} 11. f3 c6 {[#]} 12. Nh3 $146 ({Predecessor:} 12. b4 Na6 13. a3 cxd5 14. cxd5 Nh7 15. Bd3 f5 16. Nge2 Bd7 17. O-O-O Nc7 18. Kb2 b5 19. Rc1 {1-0 (54) Zanan,E (2535)-Agibileg,U (2413) Belgrade 2021}) 12... cxd5 {White is slightly better.} 13. cxd5 Bd7 14. Nf2 Rc8 15. Qd2 a6 16. Bd1 {Hoping for b4.} a5 17. Nd3 b5 {...b4 is the strong threat.} 18. Nxc5 dxc5 19. Qf2 Qe7 (19... c4 $14) 20. a4 b4 21. Nb5 c4 22. Na7 Ra8 (22... Rc7 $1 $14) 23. Bc5 $18 Qd8 24. Be2 $36 {[%mdl 2048] White has strong initiative.} Qc7 {intending ...c3.} 25. d6 Qb7 26. Bxc4 Be6 27. Bb5 Bd7 28. O-O Bh6 29. Bxd7 Nxd7 30. Nb5 Ra6 (30... Nxc5 $16 31. Qxc5 Rfc8) 31. Be3 $1 {[%cal Re3h6]} Bxe3 32. Qxe3 Rc8 33. Rfc1 (33. Qg5 $18) 33... Rac6 $16 34. Rxc6 Rxc6 35. Rc1 $2 ({White should play} 35. Kh1 $16) 35... Qb6 $11 36. Re1 Rc1 {( -> ...Qxe3+)} 37. Qxb6 {White wants to mate with Qd8+.} (37. Kh2 {with more complications.} Qxe3 38. Rxe3 Rc2 39. b3 Rd2 40. Re1) 37... Rxe1+ 38. Kf2 {Threatening mate with Qd8+.} Nxb6 39. Kxe1 {[%mdl 4096] Endgame KN-KN} Kf8 40. b3 Ke8 $1 41. Kd2 Kd7 42. Kd3 Kc6 43. g4 Nd7 $1 44. g5 (44. gxh5 $11 gxh5 45. Nc7) 44... Nc5+ $1 $17 45. Kc4 Ne6 $1 {[%cal Re6g5] Threatens to win with ...Nxg5!} 46. d7 $2 {[%mdl 8192]} (46. Kd3 $1 $11) 46... Kxd7 $19 47. Kd5 $2 {[#]} (47. Kd3 {was the only chance.}) 47... Nf4+ $2 ({Black should try} 47... Nxg5 $1 $19 {[%mdl 512]} 48. Kxe5 (48. hxg5 $2 h4 $19) 48... Nxf3+ {[%mdl 64] Double Attack} 49. Kf4 Nxh4) 48. Kxe5 $14 Ng2 49. Kf6 Nxh4 50. Kxf7 $2 {[%mdl 8192]} (50. f4 $11 Ng2 51. f5 gxf5 52. e5 (52. Kxf5 Ne3+ 53. Kf4 Nc2 $17) (52. exf5 h4 $11) (52. Kxf7 fxe4 53. Nd4 Nf4 $19)) 50... Nxf3 $19 51. Kxg6 h4 52. Kf6 {[#]} Nxg5 $1 {[%mdl 576] Promotion. Black mates.} 53. Kxg5 {KN-K3P} (53. e5 h3) 53... h3 54. Kf6 h2 55. e5 h1=Q 56. e6+ Kc6 57. Nd4+ Kd5 58. e7 Qh4+ 59. Kf7 Qh5+ 60. Kf8 Kxd4 {What a bad dream for White.  Weighted Error Value: White=0.68/Black=0.19} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.2"]
[White "Gurbanov, Andrei"]
[Black "Gedgafov, Chamal"]
[Result "1-0"]
[ECO "E18"]
[WhiteElo "2252"]
[BlackElo "2202"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,51,-2,21,22,35,16,50,47,55,57,50,51,47,43,53,50,70,63,70,67,66,77,87,78,252,250,476,443,465,396,449,443,409,301,299,267,475,299,1440,1416,29986,29987,29990,29991]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qc2 Bb7 6. Bg2 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} Be7 7. O-O O-O 8. Nc3 {White is slightly better.} d5 9. cxd5 exd5 10. Bf4 c6 11. Rad1 {[#]} h6 $146 ({Predecessor:} 11... Re8 12. Rfe1 Na6 13. a3 Nc7 14. Ne5 Ne6 15. Bc1 Nd7 16. Nf3 Nf6 17. Bh3 Bf8 {1-0 (47) Monroy Garzon,N (2094)-Puppi Lazo,S (1753) Manta 2017}) 12. Rfe1 Re8 13. Ne5 Bb4 14. a3 Bxc3 15. Qxc3 Nfd7 16. e4 g5 $2 {Black cannot hold the game after this.} (16... Nxe5 $16 {was worth a try.} 17. dxe5 (17. Bxe5 Nd7 $14) 17... Na6) 17. Bc1 $18 dxe4 $2 (17... Nxe5 18. dxe5 Nd7) 18. Bxe4 Qf6 19. f4 {[#] And now fxg5 would win.} Qg7 20. fxg5 hxg5 21. Qf3 Nf6 22. Bb1 Nd5 $2 {[#]} (22... Nbd7 23. Nxc6 Rxe1+ 24. Rxe1 Re8 25. Rxe8+ Nxe8) 23. Qh5 Re7 $2 (23... Nf6 24. Qxg5 Qxg5 25. Bxg5 Nbd7 26. Bxf6 Nxf6) 24. Bxg5 Rxe5 25. dxe5 Nd7 26. Bh6 {Weighted Error Value: White=0.22/Black=0.63} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.3"]
[White "Glazar, Domagoj"]
[Black "Moya Albaladejo, Jose Antonio"]
[Result "0-1"]
[ECO "B45"]
[WhiteElo "2142"]
[BlackElo "1923"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,74,23,31,-22,-9,-16,4,-6,-18,-46,-46,-46,-46,-46,-46,-46,-41,-82,-84,-89,-78,-213,-208,-213,-267,-447,-447,-448,-414,-436,-435,-518,-489,-599,-586,-684,-679,-648,-597,-585,-578,-537,-527,-626,-624,-1068,-1033,-2095,-1639,-12839,-6833,-29990,-29991,-29991,-29992,-29993,-29994,-29994,-29995]} 1. e4 c5 2. Nc3 Nc6 3. Nge2 e6 4. d4 cxd4 5. Nxd4 Nf6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qb6 10. Qe2 {B45: Sicilian Four Knights.} ({White should try} 10. c4 $14) 10... a5 {[%cal Ba7a5,Ba5a4][%mdl 32]} 11. a3 Ba6 12. c4 {[#]The position is equal.} Qd4 $1 13. Qd3 (13. Rb1 Rb8) 13... Qxd3 14. Bxd3 Nb6 $1 15. b3 a4 $1 16. Be3 {[#]} Nd5 {[%cal Rd5e3] [#]} 17. cxd5 $146 {aiming for Bxa6.} (17. Kd2 Nxe3) ({Predecessor:} 17. Ke2 Nxe3 18. Kxe3 axb3 19. Rhb1 Rb8 20. c5 b2 21. Bxa6 Rb3+ 22. Bd3 bxa1=Q 23. Rxa1 {½-½ (56) Tsydypov,Z (2438)-Kryukov,D (2235) Voronezh 2016}) 17... Bxd3 18. Nf2 Bb5 19. dxe6 {White does not recover from this.} (19. bxa4 $17 Rxa4 20. d6) 19... axb3 $19 20. exd7+ Kxd7 21. Bc1 $2 {[#]} (21. Ne4 b2 22. Rd1+ Kc7 23. Kf2) 21... Bb4+ $1 {[%mdl 512]} 22. Bd2 Bxa3 23. Bc3 Ke6 {Hoping for ...Bb4!} 24. g4 g6 {White must now prevent ...Bb4!} ({Not} 24... Bb4 25. f5+ Kd5 26. O-O-O+ Kc4 27. Bb2 $17) 25. Ne4 b2 26. Rb1 Bd3 27. Ng5+ Kd5 28. Kd2 Bxb1 29. Rxb1 h6 30. Nxf7 Rhf8 31. Nxh6 Rxf4 32. Ke3 Re4+ 33. Kd3 Rf8 34. Rd1 Rf3+ {Black mates.} 35. Kc2+ Kc4 36. Be1 Re2+ 37. Kb1 Rf1 {Weighted Error Value: White=1.29/Black=0.04} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.4"]
[White "Anfinogenov, Artem"]
[Black "Zakharova, Evgeniya"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2032"]
[BlackElo "2045"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,45,31,48,43,68,68,71,70,67,61,58,40,75,71,66,67,73,56,60,63,116,101,111,75,132,27,27,25,29,43,30,36,584,574,577,577,563,571]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 c6 6. h3 {B01: Scandinavian Defence.} Nbd7 7. Bd3 g6 8. O-O {White is better.} Bg7 9. Re1 O-O 10. Be3 {[#]} a6 $146 ({Predecessor:} 10... Nb6 11. Qd2 Re8 12. Ne5 Nbd5 13. Nxd5 Nxd5 14. Bh6 Bh8 15. c4 Nc7 16. c5 Qxd4 {½-½ (50) Samaridis,K (2105)-Djordjevic,V (2347) Chess.com INT 2020}) 11. a4 $36 {[%mdl 2048] Keeping Black busy.} b6 12. Qd2 e6 13. Bf4 Qe7 14. Ne5 Bb7 {[#]} (14... Nxe5 $14 15. dxe5 (15. Bxe5 Bb7 $14) 15... Nd5) 15. Nc4 $1 $16 Ne8 16. Ne4 Bxd4 ({Black should play} 16... c5) 17. Ncd6 (17. Bg5 $16 f6 18. Bh6) 17... Ndf6 $11 18. Nxb7 Qxb7 {[#]} 19. Bxa6 $1 Qd7 {[#]} 20. Bh6 $1 Bxb2 $2 {[%mdl 8192] [#]} (20... Rxa6 $14 21. Nxf6+ Nxf6 22. Bxf8 Kxf8) 21. Qb4 $1 $18 {[%csl Gh6][%cal Rb4f8][%mdl 64] Double Attack. White is clearly winning.} c5 22. Qxb2 Nxe4 23. Bb5 {Weighted Error Value: White=0.12/Black=0.41} ({Not} 23. Rxe4 Rxa6 24. Bxf8 Kxf8 $18) 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.5"]
[White "Vasquez, Georges"]
[Black "Zavarsky, Juraj"]
[Result "1/2-1/2"]
[ECO "A47"]
[WhiteElo "1864"]
[BlackElo "1975"]
[Annotator "TA"]
[PlyCount "36"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,36,33,15,31,27,41,30,40,26,43,24,54,42,154,118,109,42,131,16,18,10,16,17,14]} 1. d4 Nf6 2. Bf4 b6 3. e3 e6 4. Nf3 Bb7 5. Nbd2 c5 6. c3 cxd4 7. exd4 Be7 8. Bd3 {8.h3 is the hot move.} h6 {A47: 1 d4 Nf6 2 Nf3 b6: Torre, London and Colle Systems.} 9. O-O {[#]} Nh5 $146 ({Predecessor:} 9... a6 10. h3 d6 11. Qe2 Nbd7 12. Bh2 Nf8 13. Ne4 N8h7 14. Rfe1 O-O 15. Nxf6+ Nxf6 16. Nd2 {0-1 (43) Feijo,F (1877)-Nunes,M (2069) Joao Pessoa 2014}) 10. Be3 d6 {White has an edge.} 11. Re1 Nf6 12. Nf1 Nd5 13. Bd2 Bg5 ({Black should play} 13... Nd7 $14) 14. Be4 Bxd2 15. Qxd2 (15. N3xd2 $16 {aiming for c4.} Bc6 16. c4) 15... Qc7 {[#]} (15... Qd7 $14) 16. Ne3 (16. c4 $1 $16 {[%cal Rc4d5]} Ne7 17. d5) 16... Nxe3 $11 {The position is equal.} 17. Qxe3 {With the idea d5.} O-O 18. Bxb7 Qxb7 {Weighted Error Value: White=0.29/Black=0.28} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.6"]
[White "Kaydanovich, Marina"]
[Black "Petrov, Maksim"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "1737"]
[BlackElo "1568"]
[Annotator "NA RC"]
[PlyCount "67"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 c5 5. Nc3 Nc6 6. e3 Bd6 7. O-O O-O 8. Nb5 Be7 9. Qe2 a6 10. Nc3 Bd7 11. Rd1 Rc8 12. e4 cxd4 13. Nxd4 Nxd4 14. Rxd4 e5 15. Rd1 d4 16. Nd5 Bb5 17. Nxe7+ Qxe7 18. Qd2 Qc7 19. a4 Bd7 20. c3 dxc3 21. bxc3 Rfd8 22. Qe1 Bg4 23. Rxd8+ Rxd8 24. Be3 Rd3 25. c4 Be6 26. c5 Qc6 27. f3 Nd7 28. Bf1 Rb3 29. Qc1 Rb4 30. a5 Ra4 31. Ra3 f6 32. Qc3 Rxa3 33. Qxa3 Qc7 34. Qb4 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.7"]
[White "Nikitskaya, Varvara"]
[Black "Kimsanboyev, Axadxon"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "1173"]
[BlackElo "1636"]
[Annotator "NA RC"]
[PlyCount "76"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. a4 a6 8. Na3 Be7 9. Bg5 Be6 10. Bxf6 Bxf6 11. Bc4 O-O 12. Nd5 Bg5 13. O-O Ne7 14. c3 Nxd5 15. Bxd5 Bxd5 16. Qxd5 Qc7 17. Nc2 Qb6 18. Rab1 Rac8 19. a5 Qc7 20. Nb4 Qe7 21. Qd2 Qe6 22. Nd5 Kh8 23. b4 f5 24. Qe2 fxe4 25. Qxe4 Rc6 26. Rbd1 Qh6 27. Rd3 g6 28. Rfd1 Qg7 29. c4 Qf7 30. Rf3 Qg8 31. Rxf8 Qxf8 32. Nb6 Bd8 33. b5 axb5 34. cxb5 Rc7 35. g3 Rf7 36. Nc4 Rxf2 37. Nxd6 Bxa5 38. Qxe5+ Qf6 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.8"]
[White "Valenta, Vit Vaclav"]
[Black "Bortnik, Timur"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "2028"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,70,25,20,14,42,27,37,14,106,35,43,42,41,40,78,58,68,50,57,36,93,89,404,416,406,389,291,263,466,168,169,50,67,39,181,174,165,166,174,120,329,320,543,97,275,299,5735,2634,29975,29976,29970,6311,5169,1741,2514,2416,29999]} 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Nf3 Bg4 7. Be2 Bd6 8. O-O O-O 9. c4 {B15: Caro-Kann: 3 Nc3: 3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6.} Qc7 10. h3 Bh5 11. Be3 {[#] White is slightly better.} g5 $146 (11... Nd7 $11 {keeps the balance.}) ({Predecessor:} 11... Nd7 12. Qd2 c5 13. dxc5 Nxc5 14. Nd4 Bxe2 15. Qxe2 a6 16. b4 Ne6 17. c5 Bh2+ 18. Kh1 Nxd4 19. Bxd4 Rfe8 {0-1 (33) Dobrikov,M (2565)-Urazayev,A (2739) Chess.com INT 2020}) 12. Qd2 (12. h4 $16) 12... Re8 $14 13. Rfe1 Na6 14. a3 Bg6 15. b4 Rad8 16. Qb2 Bf4 17. Bf1 Be4 ({Black should try} 17... Bxe3 $14 18. Rxe3 Rxe3 19. fxe3 Qe7) 18. Nd2 b6 $2 {[%mdl 8192]} (18... Bg6 $16) 19. Bxf4 $18 Qxf4 20. g3 (20. Nxe4 Rxe4 21. Rxe4 Qxe4 $16) 20... Qf5 21. Re3 ({Don't take} 21. Nxe4 $6 Rxe4 22. Rxe4 Qxe4 $16) 21... Nc7 $2 (21... Bc2 22. Rf3 Qg6) 22. Rxe4 $2 (22. Nxe4 Qg6 23. Nc3) 22... Rxe4 23. Nxe4 ({White must play} 23. Bd3 $18 Re1+ 24. Rxe1 Qxd3 25. d5 {[%mdl 64] Discovered Attack}) 23... Qxe4 $14 24. Rd1 Ne6 (24... f5 $14) 25. Bg2 $36 {[%mdl 2048] White is really pushing.} Qf5 26. Bxc6 Qxh3 27. d5 ({Better is} 27. Rd2 $1 $18) 27... Qg4 $2 {[#]} 28. Rd2 $1 Nf4 (28... Qxc4 29. dxe6 {[%mdl 64] Discovered Attack} (29. Rc2 Qe4 $11) 29... Rxd2 30. Qxd2 Qxe6) 29. d6 $2 (29. Qxf6 $18 {is the precise move to win.} Rc8 30. Bb5) 29... Nh3+ $2 (29... Kg7 $16) 30. Kh2 Qxc4 $2 (30... Kg7 31. Bg2 Nxf2) 31. Qxf6 Qxc6 32. Qxd8+ {KQR-KQN} Kg7 33. Qe7 {White threatens d7 and mate.} Qc1 {[#]} 34. Qe3 (34. d7 $142 $1 {[%mdl 512]} Qxd2 35. Kxh3) 34... g4 35. Qd4+ Kf8 36. Qh8# {Weighted Error Value: White=0.51/Black=1.37} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.9"]
[White "Pilimon, Zbigniew"]
[Black "Aleksandrova, Aleksandra"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "1638"]
[BlackElo "1728"]
[Annotator "NA RC"]
[PlyCount "115"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d6 2. c4 c6 3. Nc3 f5 4. e4 fxe4 5. Nxe4 Bf5 6. Bd3 Na6 7. Nf3 Nf6 8. Qe2 Nxe4 9. Bxe4 g6 10. O-O Qd7 11. Re1 h6 12. Bd2 Kf7 13. Bc3 Re8 14. d5 Bg7 15. Bxg7 Kxg7 16. Nd4 cxd5 17. Bxf5 gxf5 18. Ne6+ Kf6 19. Qd2 Reg8 20. Qd4+ Kf7 21. Qxd5 Ke8 22. a3 Qc6 23. b4 Rg4 24. Rac1 Rhg8 25. g3 f4 26. Nxf4 Nc7 27. Qf5 R8g5 28. Qc8+ Kf7 29. Nd5 Nxd5 30. Qe6+ Kg7 31. cxd5 Qxd5 32. Qxe7+ Kh8 33. Qf8+ Kh7 34. Rc7+ Rg7 35. Rxg7+ Rxg7 36. Qf4 Qd3 37. Qe4+ Qxe4 38. Rxe4 d5 39. Rd4 Rd7 40. f4 Kg6 41. g4 h5 42. h3 hxg4 43. hxg4 Kf6 44. Kf2 Ke6 45. a4 Rc7 46. Ke3 Rc3+ 47. Rd3 Rc4 48. Rb3 Re4+ 49. Kf3 Rc4 50. a5 b5 51. Re3+ Kd6 52. f5 Rxb4 53. Re6+ Kd7 54. g5 Rb3+ 55. Kf4 d4 56. g6 Rb1 57. g7 Rg1 58. Rg6 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.21"]
[Round "4.10"]
[White "Dubov, Pavel"]
[Black "Nazarov, Nicolai"]
[Result "0-1"]
[ECO "C01"]
[BlackElo "1770"]
[Annotator "NA RC"]
[PlyCount "62"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 c6 5. Nf3 Bd6 6. Bd3 Ne7 7. Ng5 h6 8. Nf3 O-O 9. O-O Bf5 10. Nh4 Bxd3 11. Qxd3 Nd7 12. Qf3 f5 13. Qe3 f4 14. Qe6+ Rf7 15. Qxd6 Nc8 16. Qe6 Qxh4 17. Qe8+ Nf8 18. Re1 Nb6 19. Qe2 Qf6 20. Qd3 Ng6 21. b3 Nh4 22. h3 g5 23. Rf1 Re8 24. g3 fxg3 25. fxg3 Qxf1+ 26. Qxf1 Rxf1+ 27. Kxf1 Nf5 28. Kf2 Nd7 29. g4 Nd6 30. a4 Ne4+ 31. Ke1 Ng3+ 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.1"]
[White "Moya Albaladejo, Jose Antonio"]
[Black "Obodchuk, Andrei"]
[Result "0-1"]
[ECO "B80"]
[WhiteElo "1923"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,134,0,0,0,0,0,-60,-60,-67,-65,-105,-93,-99,-93,-93,-93,-95,-93,-93,-86,-91,-83,-85,-74,-72,-73,-80,-81,-663,-97,-97,-93,-96,-91,-94,-91,-94,-96,-93,-58,-65,-65,-83,-65,-85,-49,-74,-57,-69,-69,-70,-70,-70,-49,-45,-44,-55,-55,-58,-58,-58,-50,-50,-48,-62,-48,-55,-47,-50,-40,-60,-45,-86,-86,-86,-86,-86,-86,-92,-92,-92,-93,-101,-101,-143,-143,-143,-143,-348,-152,-188,-152,-152,-151,-152,-151,-152,-152,-316,-316,-316,-278,-365,-329,-333,-352,-354,-321,-395,-411,-418,-414,-395,-392,-407,-236]} 1. e4 c5 2. Nf3 e6 3. g3 Nc6 4. Bg2 Nf6 5. Nc3 d6 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bd7 9. Ndb5 Qb8 10. Bf4 Ne5 11. a4 a6 {B80: Sicilian Scheveningen: 6 g3 and 6 Be3, including English Attack.} 12. Nd4 Qc7 {[#]} 13. Bxe5 $146 (13. Bc1 $11) ({Predecessor:} 13. Re1 O-O 14. h3 Rac8 15. Be3 Rfd8 16. Kh2 h6 17. f4 Nc4 18. Bc1 e5 19. Nf3 {0-1 (43) Gu,T (2171)-Ju,W (2568) China 2018}) 13... dxe5 $15 {Black is slightly better.} 14. Nb3 Rc8 15. a5 Bb4 16. Na4 Bxa5 17. Nac5 Bb6 18. Nxd7 Nxd7 19. c3 O-O 20. Qe2 Rfd8 21. Rfd1 Nc5 22. Nxc5 Qxc5 23. Rac1 a5 24. Rc2 $2 {[%mdl 8192] [#]} (24. h4 $17) 24... Rxd1+ $2 (24... Qxf2+ $1 $19 {[%mdl 512]} 25. Qxf2 Rxd1+ 26. Bf1 Bxf2+ 27. Kxf2 Rcd8) 25. Qxd1 $17 Rd8 26. Qe2 g6 27. Bf1 Qd6 28. Qb5 Kg7 29. Be2 Rd7 30. Kg2 Qc7 31. Kg1 Bc5 32. Kg2 Be7 33. Kg1 Bf6 34. Kg2 Qd8 35. Kg1 b6 36. Kg2 Rd2 (36... h5 {is interesting.} 37. h4 Kf8 38. Bf3 Kg8 39. Be2 Rd6) 37. Rxd2 Qxd2 38. Bf1 Qd6 39. Qd3 Qc7 40. Qc4 Qb7 41. Bd3 Be7 42. Qa6 Qb8 43. Qb5 Bc5 44. Qd7 Qa8 45. f3 a4 {Hoping for ...a3.} 46. Bc4 Kf6 47. Qd2 Qc6 48. h4 Kg7 49. Qe2 a3 50. bxa3 Bxa3 51. Qd3 Bb2 52. Kh2 Qc5 53. Kg2 {[#]} Bxc3 $1 {[%mdl 512]} 54. g4 $2 ({Wrong is} 54. Qxc3 $2 b5 $19) (54. Bb5 $17 {keeps fighting.}) (54. Qe2 Bd4) 54... Bd4 (54... Be1 $19 {and Black stays clearly on top.} 55. Qf1 Bxh4) 55. Bb5 Qc1 56. Qf1 Qe3 57. Kg3 Bc5 58. Kg2 Qf4 59. Qc4 $2 (59. Qe1 $17) 59... Be7 $19 60. h5 Bh4 {( -> ...Qg3+)} 61. Qc3 gxh5 62. gxh5 Qg5+ 63. Kf1 Qxh5 64. Qe3 Bg5 {Black is winning.} 65. Qxb6 Qxf3+ 66. Qf2 Qxe4 {aiming for ...Qb1+.} 67. Be2 Qh1+ {Weighted Error Value: White=0.30/Black=0.23} (67... f5 $142 68. Qf3 Qb1+ 69. Kg2 Qb2) 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.2"]
[White "Anfinogenov, Artem"]
[Black "Gurbanov, Andrei"]
[Result "1/2-1/2"]
[ECO "D31"]
[WhiteElo "2032"]
[BlackElo "2252"]
[Annotator "TA"]
[PlyCount "46"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,46,14,18,18,18,15,21,14,31,29,38,21,39,53,60,26,29,31,35,28,32,20,20,16,16,16,25,16,16,18,19,10,17,17,25,18,70,58,64]} 1. c4 e6 2. d4 d5 3. Nc3 a6 4. cxd5 exd5 5. Bf4 Nf6 6. e3 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6.} Bd6 7. Bxd6 {7.Bg5 is more advanced technology.} Qxd6 8. Bd3 {The position is equal.} Nc6 9. Nge2 Ne7 10. Qc2 g6 11. f3 c5 12. dxc5 Qxc5 13. Nd4 {[#]} Nc6 $146 ({Predecessor:} 13... Bd7 14. O-O Nc6 15. Qf2 Ne5 16. Rfd1 O-O 17. Rac1 Qb6 18. b3 Rfe8 19. Bb1 Rad8 {0-1 (30) Li,Y (2427)-Ma,Q (2620) China 2018}) 14. Nxc6 bxc6 15. Kf2 d4 16. Nd1 Qxc2+ 17. Bxc2 c5 18. exd4 cxd4 19. b3 Be6 20. Nb2 Ke7 21. Rhd1 Rhd8 22. Rd2 Rac8 ({Black should try} 22... a5 $11) 23. Bd3 $1 $14 a5 {Weighted Error Value: White=0.04/Black=0.11} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.3"]
[White "Gedgafov, Chamal"]
[Black "Vasquez, Georges"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "2202"]
[BlackElo "1864"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,59,8,35,23,22,26,18,17,72,72,63,69,83,89,89,97,120,102,186,212,274,285,360,364,333,126,202,171,202,162,262,255,490,481,1981,1916,2010,1990,5335,5520,1979,2012,29986,29987]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 a5 8. Be3 Na6 9. Nd2 Ne8 10. O-O {E92: King's Indian: Classical: 6 Be2 e5: 7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7.} f5 {Strongly threatening ...f4.} 11. f3 f4 12. Bf2 {The position is equal.} g5 {[#]} (12... Qg5 $11 {remains equal.}) 13. a3 $1 $16 Bd7 14. Rb1 Rf6 15. b4 axb4 16. axb4 Rg6 17. c5 {[#]} h5 $146 {[#]} (17... Nb8 $16) ({Predecessor:} 17... Bf8 18. c6 bxc6 19. dxc6 Be6 20. Nd5 h5 21. Ra1 Bxd5 22. Rxa6 Rxa6 23. Bxa6 Bxc6 {0-1 (37) Morasso,J-Malamud,L (1960) Lichess.org INT 2020}) 18. c6 $1 $18 {[%cal Rc6b7]} Bc8 19. Ra1 bxc6 20. dxc6 g4 21. g3 $2 (21. fxg4 $18 {has better winning chances.} Bxg4 22. Nf3) 21... h4 (21... Nf6 $16) 22. fxg4 hxg3 23. hxg3 {aiming for b5.} fxg3 (23... Nf6 $142) 24. Bxg3 Qg5 $2 (24... Nf6 {might work better.} 25. b5 Nh5) 25. Nd5 Nxb4 (25... Bh6 $142 26. b5 Kg7) 26. Rxa8 Nxd5 27. exd5 Bxg4 28. Rxe8+ Kh7 29. Bxg4 Qe3+ 30. Kg2 {White took control after the opening.  Weighted Error Value: White=0.13/Black=0.78} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.4"]
[White "Glazar, Domagoj"]
[Black "Tsapalin, Sergey"]
[Result "0-1"]
[ECO "A81"]
[WhiteElo "2142"]
[BlackElo "1981"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,76,31,33,22,15,18,23,24,21,30,62,38,70,68,67,66,62,20,93,106,98,96,115,91,103,76,64,59,68,56,70,72,77,58,81,79,93,-50,-40,-35,-23,-407,-398,-370,-379,-827,-827,-829,-818,-799,-768,-840,-834,-834,-827,-834,-826,-825,-824,-877,-729,-1206,-981,-29983,-29984,-29989,-29990,-29990,-29991]} 1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3 Nf6 5. c3 O-O 6. O-O {A81: Dutch Defence: 2 g3.} d5 7. Nd2 {[%cal Bb1d2,Bd2f3,Bf3e5][%mdl 32]} c6 8. Nf3 {White has an edge.} Ne4 9. Nf4 Na6 10. Nd3 Nc7 11. Nfe5 Ne6 12. f3 Nd6 {[#]} 13. Qe1 $146 (13. Qb3 {keeps more tension.} Qb6 14. Re1 Rd8 15. Be3 Bd7 16. Red1) ({Predecessor:} 13. Nf4 Qb6 14. Nfd3 f4 15. Qb3 Qxb3 16. axb3 g5 17. e3 fxg3 18. hxg3 Nf5 19. Kf2 {0-1 (46) Larrea,D (1774)-Silva Rosas,N (1809) Punta del Este 2019}) 13... Nf7 (13... Qb6 $11 {remains equal.}) 14. Nxf7 $16 Rxf7 15. e4 Nc7 16. Bf4 e6 17. exf5 exf5 18. Qd2 Ne6 19. Be5 f4 20. Bxg7 Kxg7 21. Rae1 Qg5 22. Re5 Qf6 23. Bh3 (23. Rfe1 $16) 23... fxg3 $1 $15 24. hxg3 {[#]} Nxd4 $1 25. Bxc8 {[%mdl 8192] This move loses the game for White.} (25. Bg2 $11 {and White is okay.} Nb5 26. g4) 25... Nxf3+ $19 26. Rxf3 Qxf3 27. Bh3 $2 (27. Be6 Qxg3+ 28. Qg2 Qxd3 29. Bxf7 Qd1+ 30. Kh2 Kxf7 31. Qf2+ Kg8 32. Qe3) 27... Qxg3+ {[%mdl 64] Double Attack} 28. Bg2 Raf8 {[%csl Gf8][%cal Rf7f1] [#]} 29. Re1 Rf3 30. Re7+ Kg8 {[%csl Gf8][%cal Rf3f1]} 31. Qe1 Rxd3 32. Qxg3 Rxg3 33. Rxb7 {[%mdl 4096] Endgame KRR-KRB} Rf5 34. Kh2 Rgg5 {And now ...Rf2! would win.} 35. Kh3 h5 36. Rc7 h4 {Black mates.} 37. Rxc6 Rg3+ 38. Kh2 Rf2 {[%mdl 64] Double Attack.  Weighted Error Value: White=0.81/Black=0.20} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.5"]
[White "Zakharova, Evgeniya"]
[Black "Nikitskaya, Varvara"]
[Result "1-0"]
[ECO "A46"]
[WhiteElo "2045"]
[BlackElo "1173"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,92,29,32,27,21,0,14,-11,-7,-45,-18,-77,-95,-86,-86,-163,-154,-185,-181,-174,-131,-178,-131,-197,-197,-186,-171,-133,-95,-128,-69,-85,-75,-83,-83,-83,-63,-143,-104,-141,-116,-166,-171,-148,0,-225,-220,-225,-218,-260,-242,-245,-20,-12,121,125,173,162,172,172,157,164,513,502,5106,5106,5102,5018,5090,5037,5037,5030,29981,29981,29990,29983,29989,29990,29995,29996,29997,29998,29998,29999,29999]} 1. d4 Nf6 2. Nf3 c5 3. c3 cxd4 4. cxd4 g6 5. Bf4 Bg7 6. e3 {[#] A46: 1 d4 Nf6 2 Nf3 e6: Torre, London and Colle Systems.} a6 $146 ({Predecessor:} 6... O-O 7. Nc3 d6 8. Be2 Nc6 9. O-O Nh5 10. Bg5 h6 11. Bh4 g5 12. d5 gxh4 13. Nxh4 Nf6 14. dxc6 bxc6 15. Rc1 Rb8 16. b3 {1-0 (52) Carlsen,M (2863)-Aronian,L (2773) chess24.com INT 2020}) 7. Qb3 Nc6 8. h3 {The position is equal.} O-O 9. Nbd2 d6 10. d5 (10. a3 $11) 10... Na5 $17 {[%cal Bc6a5,Ba5b7,Bb7c5][%mdl 32]} 11. Qd3 b5 12. Bh2 (12. e4 $17 {keeps fighting.}) 12... Nb7 $1 $19 13. e4 Nc5 14. Qe3 Bb7 15. Bd3 Nfd7 16. Nd4 (16. Rb1 $17 {was necessary.}) 16... Nxd3+ 17. Qxd3 Nc5 18. Qe3 f5 19. exf5 Bxd4 (19... gxf5 $17 20. Nc6 Bxc6 21. dxc6 Rc8) 20. Qxd4 $15 Rxf5 21. O-O Rxd5 22. Qe3 e5 23. b4 (23. Rad1 $15) 23... Nd3 24. Ne4 Rd4 25. Ng5 {aiming for Ne6.} Qf6 26. Rad1 Nf4 (26... Nb2 $1 $17 {[%cal Rb2d1]} 27. Rxd4 exd4) 27. Bxf4 $2 (27. Nxh7 $11 {and White is okay.} Kxh7 28. Rxd4 Bxg2 29. Rfd1 exd4 30. Qxf4 Qxf4 31. Bxf4) 27... Rxf4 $19 28. Qb3+ Rc4 $1 29. f4 exf4 30. h4 Kg7 $2 (30... h6 $19 31. Nf3 Re8) 31. Rfe1 $1 $11 {[%cal Re1e6] Hoping for Re6.} Bc8 (31... Rc3 $11 32. Qe6 Qxe6 33. Rxe6 Rc7) 32. Ne4 $16 {White leaves nothing to chance now.} Qxh4 {And now ...Bg4 would win.} 33. Nxd6 {Strongly threatening Qb2+.} Bg4 34. Nxc4 {Threatens to win with Nd6.} Bxd1 {[#]} 35. Qc3+ ({Not} 35. Rxd1 bxc4 36. Qxc4 Kh6 $11) 35... Kh6 $2 {[#]} (35... Kg8 36. Rxd1 Qg4) 36. Ne5 $1 $18 {[%cal Re5f7]} Bg4 (36... Rf8 $142 37. Rxd1 f3 38. Nxf3 Qf6) 37. Nf7+ Kh5 38. Re5+ Bf5 39. Qf3+ {[%mdl 64] Double Attack} Qg4 40. Qxa8 Qd1+ 41. Kh2 {White mates.} Kg4 42. Nh6+ Kg5 43. Nxf5 gxf5 44. Qg8+ {[%mdl 64] Double Attack} Kh6 45. Re6+ {[%mdl 64] Double Attack} Kh5 46. Qxh7+ {[%mdl 64] Double Attack} Kg5 47. Rg6# {Weighted Error Value: White=0.33/Black=0.64} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.6"]
[White "Kimsanboyev, Axadxon"]
[Black "Valenta, Vit Vaclav"]
[Result "1-0"]
[ECO "A48"]
[WhiteElo "1636"]
[BlackElo "2028"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,103,1,9,7,0,0,0,0,17,18,10,0,66,66,79,81,85,54,96,87,107,101,97,-13,127,112,131,127,401,387,384,286,390,389,387,385,372,356,439,433,434,443,439,427,493,499,466,481,618,615,614,608,636,629,666,666,655,632,625,576,711,716,713,711,710,721,711,710,778,797,761,747,784,868,866,875,854,858,793,773,871,868,1005,868,2656,2283,2178,2478,2473,2425,2211,2218]} 1. d4 Nf6 2. Bf4 g6 3. e3 Bg7 4. Nf3 d6 5. Be2 O-O 6. h3 Nbd7 7. O-O b6 8. a4 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems.} a5 9. Nc3 Bb7 10. Qd3 {The position is equal.} Re8 {aiming for ...e5.} 11. Rad1 Qc8 {[#]} 12. Qc4 $146 ({Predecessor:} 12. Bg3 e5 13. dxe5 dxe5 14. Qc4 Ba6 15. Qa2 Bxe2 16. Nxe2 Ne4 17. Nd2 Ndc5 18. Nxe4 Nxe4 {1-0 (30) Prie,E (2510)-Bailet,P (2426) Pau 2012}) 12... c5 ({Black should try} 12... Ne4 $11) 13. Qa2 h6 14. Bh2 Rf8 15. Nh4 Kh7 16. Bc4 Qe8 17. Nb5 Rc8 18. Bxd6 (18. d5 $16) 18... cxd4 {[#]} (18... exd6 $11 19. Nxd6 {[%mdl 64] Double Attack} Qe7 20. Nxc8 (20. Nxb7 cxd4 21. exd4 Nh5 $15) 20... Bxc8) 19. Nc7 $1 $16 {[%cal Rc7e8]} Qd8 (19... Rxc7 20. Bxc7) 20. Bxf7 Rxc7 $2 {[%mdl 8192] This move loses the game for Black.} (20... exd6 $16 {was worth a try.} 21. Bxg6+ Kh8) 21. Bxc7 Qxc7 22. Bxg6+ Kh8 23. Bf5 {White wants to mate with Ng6+!} Ne5 24. exd4 Bd5 25. b3 Nc6 26. Ng6+ {[%mdl 64] Double Attack. White is clearly winning.} Kg8 27. Nxf8 Kxf8 28. c4 Nb4 29. Qe2 Bf7 30. Rfe1 Bh5 31. g4 Be8 32. Qf3 Kg8 33. Re2 Nc6 34. d5 Nd8 35. Rde1 Bf8 36. Qg2 {Black must now prevent g5!} Nf7 37. h4 Qf4 38. Be6 Kg7 39. g5 hxg5 40. Bxf7 Bxf7 41. Qxg5+ Qxg5+ 42. hxg5 Nd7 43. Rxe7 Bxe7 44. Rxe7 Nc5 45. f4 Kf8 46. Rc7 Be8 47. f5 Bd7 48. f6 {Threatens to win with g6.} Kf7 49. Kf2 Kg6 50. Ke3 Kf7 51. Kf4 Kg6 52. Ke5 {Weighted Error Value: White=0.08/Black=0.43} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.7"]
[White "Zavarsky, Juraj"]
[Black "Kaydanovich, Marina"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "1975"]
[BlackElo "1737"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,103,15,18,-2,3,0,0,0,4,0,26,25,35,0,0,-11,-9,-2,0,0,0,0,16,7,25,8,26,0,55,53,57,33,126,96,101,100,122,108,108,98,112,32,118,117,115,76,81,79,72,0,0,-139,-120,-222,69,28,72,28,110,77,77,77,77,0,19,19,27,0,0,0,50,0,55,55,55,55,55,37,37,37,78,25,25,1,60,60,60,60]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. d3 d6 6. c3 Bb6 7. Nbd2 O-O 8. Nc4 {8.Bxc6 is the recent fashion.} Ne7 9. Nxb6 axb6 10. Bc4 {C48: Four Knights: 4 Bb5, replies other than 4...Bb4.} Ng6 11. Re1 {[#]} Qe7 $146 ({Predecessor:} 11... Be6 12. Bxe6 fxe6 13. d4 exd4 14. Nxd4 Qd7 15. f4 e5 16. f5 exd4 17. fxg6 dxc3 18. gxh7+ {0-1 (47) Kulovana,E (2359)-Sosna,J (2396) Czech Republic 2011}) 12. h3 {The position is equal.} c6 13. Bb3 h6 14. d4 Rd8 15. Qe2 Be6 {[#] Strongly threatening ...Bxb3.} 16. dxe5 dxe5 17. Be3 c5 18. Nd2 Bxb3 19. axb3 {[%cal Ba2b3,Bb3b4,Bb4b5][%mdl 32]} Qe6 20. Qc4 Qc6 21. Rxa8 Rxa8 22. b4 Nd7 (22... cxb4 $11 23. cxb4 b5 24. Qxc6 bxc6) 23. b5 $14 Qc7 24. Rd1 Ngf8 (24... Rd8 $14) 25. Qd3 Ne6 26. Nc4 Rd8 27. Qe2 Nf6 28. Rxd8+ Nxd8 29. Qf3 ({White should play} 29. f3 $16) 29... Nd7 (29... Qd7 $14) 30. Qg3 Kf8 31. f4 f6 32. f5 Nf7 {Black wants to play ...Nd6.} 33. Qg6 (33. Qe1 $16) 33... Nd6 $11 34. Nxd6 (34. Bxh6 $11 {remains equal.} gxh6 35. Qxh6+ Kg8 36. Qg6+ Kf8 37. Qh6+ Kg8 38. Qg6+ Kf8 39. Qh6+) 34... Qxd6 $17 35. Qh7 (35. Kf2 $17 {was called for.}) 35... Qe7 $2 (35... Qd3 $19 36. Bf2 Qxe4 37. Qh8+ Kf7) 36. Qh8+ Kf7 37. Qc8 Nf8 (37... Qd6 $1 $11) 38. b4 {[%cal Rb4c5]} Qd7 39. Qxd7+ Nxd7 40. bxc5 (40. Kf2 $16) 40... bxc5 $16 {[%mdl 4096] Endgame KB-KN} 41. Kf2 Ke7 42. c4 Kd6 {[#] White must now prevent ...Nb6.} 43. Ke2 $1 Kc7 (43... Nb6 $5 44. Kd3 $8 Nc8 $11) 44. g4 Kb6 ({Black should try} 44... Kd6 $11) 45. Bd2 Nf8 46. h4 Kc7 47. g5 hxg5 48. hxg5 Kd6 49. Kf3 (49. g6 $16 Ke7 50. Ba5) 49... Nd7 $11 50. g6 {And now Bh6! would win.} Ke7 (50... Nb6 $11) 51. Ba5 $14 b6 52. Bd2 {Weighted Error Value: White=0.27/Black=0.33} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.8"]
[White "Petrov, Maksim"]
[Black "Pilimon, Zbigniew"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1568"]
[BlackElo "1638"]
[Annotator "NA RC"]
[PlyCount "49"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 Bg4 7. Qb3 Nbd7 8. Qxb7 O-O 9. Qb3 Rb8 10. Qc2 Re8 11. Be2 Bxe2 12. Ngxe2 c5 13. O-O c4 14. f3 Nb6 15. Rad1 Nh5 16. Bxe7 Qxe7 17. e4 dxe4 18. fxe4 Nf6 19. e5 Nfd5 20. Qd2 Nb4 21. Ne4 Nc8 22. N2g3 Rb6 23. Nf5 Qb7 24. Nf6+ Kf8 25. Qg5 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.9"]
[White "Nazarov, Nicolai"]
[Black "Aleksandrova, Aleksandra"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1770"]
[BlackElo "1728"]
[Annotator "NA RC"]
[PlyCount "95"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d6 2. d4 c6 3. c4 Nd7 4. Nc3 e5 5. d5 a5 6. Bd3 Be7 7. Nge2 Ngf6 8. O-O O-O 9. h3 Nc5 10. Bc2 Bd7 11. Kh2 Qc7 12. f4 exf4 13. Bxf4 Rfe8 14. Ng3 Bf8 15. Qd4 Na6 16. a3 c5 17. Qd3 g6 18. Bg5 Ng4+ 19. hxg4 Bxg4 20. Rf4 h5 21. Raf1 Bg7 22. Nb5 Qb8 23. Rxf7 Be5 24. Bd1 Bf5 25. Re7 Rxe7 26. Bxe7 Qe8 27. Bxd6 Bxe4 28. Qe3 h4 29. Bxe5 Qxe5 30. Qf4 hxg3+ 31. Qxg3 Qxb2 32. Nd6 Qh8+ 33. Kg1 Qd4+ 34. Qf2 Qe5 35. Qf7+ Kh8 36. Nxb7 Bf5 37. Kh1 Qd4 38. Be2 Qe3 39. Qf6+ Kh7 40. Qh4+ Kg7 41. Qf2 Rh8+ 42. Kg1 Qe5 43. g3 Rh3 44. Kg2 Rh8 45. Rh1 Rf8 46. Qe1 Be4+ 47. Bf3 Bxf3+ 48. Kf2 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.22"]
[Round "5.10"]
[White "Wollner, Bohus"]
[Black "Dubov, Pavel"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1107"]
[Annotator "NA RC"]
[PlyCount "51"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Nf3 Nc6 3. c4 Bg4 4. e3 Nf6 5. Nc3 e6 6. Be2 Ne4 7. a3 a6 8. O-O Nxc3 9. bxc3 Bxf3 10. Bxf3 dxc4 11. Rb1 b5 12. Bxc6+ Ke7 13. Bxa8 Qxa8 14. Re1 Ke8 15. a4 c6 16. Ra1 Bd6 17. axb5 cxb5 18. Ra5 Ke7 19. Bd2 Rd8 20. Qg4 Bc7 21. Raa1 Rd5 22. e4 Rd7 23. Qxg7 Bb6 24. Bf4 b4 25. Bg5+ Ke8 26. Qg8# 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.1"]
[White "Obodchuk, Andrei"]
[Black "Gedgafov, Chamal"]
[Result "1-0"]
[ECO "C16"]
[WhiteElo "2303"]
[BlackElo "2202"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,105,48,25,58,33,19,0,32,0,48,35,93,39,67,67,67,70,72,70,78,66,69,63,99,89,131,127,128,121,131,113,163,178,178,162,223,205,170,121,156,93,219,226,196,201,205,205,185,100,373,370,369,345,357,343,347,298,285,256,246,236,235,235,358,292,448,422,520,520,575,504,532,531,528,527,528,527,498,470,459,401,516,484,1476,1455,1239,1015,1156,1008,924,712,4960,4947,5616,5043,4631,4631]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. h4 Ne7 {C16: French: 3 Nc3 Bb4 4 e5: Lines without ...c5.} 7. h5 h6 {[#]} 8. Rh3 $146 ({Predecessor:} 8. Nge2 Ba6 9. Ng3 Qd7 10. Bxa6 Nxa6 11. Be3 O-O-O 12. O-O-O Kb7 13. Kb1 c5 14. dxc5 bxc5 {1-0 (59) Lobanov,S (2510)-Borsuk,K (2401) chess.com INT 2020}) 8... Ba6 {The position is equal.} 9. Nce2 Nf5 10. Qf4 Be7 (10... c5 $14) 11. Nf3 (11. g4 $16 Nh4 12. Bd2) 11... Bg5 12. Nxg5 Qxg5 13. Qxg5 hxg5 14. Bxg5 Bxe2 15. Bxe2 Nxd4 16. Bd3 c6 17. g4 Nd7 18. Be3 Nb5 19. f4 Nc5 20. Be2 O-O-O 21. a4 Nc7 {[#]} 22. a5 $1 d4 (22... Nd7 $142 23. g5 c5) 23. axb6 axb6 24. Bd2 Kb7 25. Rha3 ({White should play} 25. Bb4) 25... Ra8 (25... Nb5 $16) 26. Rxa8 $18 Nxa8 27. Bf3 Nc7 28. Kf2 Nd5 29. f5 (29. g5 $18) 29... Ne7 $2 {[%mdl 8192] [#]} (29... b5 $16) 30. f6 gxf6 31. exf6 Nd5 32. g5 Nd7 33. Re1 Kc7 34. Re4 c5 35. c4 dxc3 36. bxc3 ({But not} 36. Bxc3 $6 b5) 36... Kd6 (36... b5 $142 37. h6 Kd6) 37. Ra4 Ke5 (37... b5 {keeps fighting.} 38. Ra6+ Ke5) 38. Ra7 N7xf6 39. gxf6 Nxf6 40. h6 Rh7 41. Ra8 Ne4+ 42. Bxe4 Kxe4 {[%mdl 4096] Endgame KRB-KR} 43. Rg8 f6 44. Rg7 Rh8 45. Re7 Kd3 46. Rd7+ {White is clearly winning.} Kc2 (46... Ke4 $142 47. Rd6 Re8 48. Rxb6 Kf5) 47. Ke2 Rg8 48. Rg7 Rd8 49. Be1 Rd5 50. Rg4 Re5+ 51. Kf1 Rh5 52. Rh4 Rf5+ 53. Bf2 {Weighted Error Value: White=0.19/Black=0.45} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.2"]
[White "Gurbanov, Andrei"]
[Black "Tsapalin, Sergey"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2252"]
[BlackElo "1981"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,99,20,114,121,122,89,95,98,206,205,209,218,206,126,128,131,124,129,121,123,135,85,131,63,91,76,83,81,108,103,111,106,143,105,122,91,93,88,81,81,174,162,199,123,123,125,192,192,192,192,192,155,155,155,162,164,154,162,196,196,291,275,370,302,302,302,292,283,260,181,189,195,181,173,173,173,173,0,166,109,109,109,1489,649,5531,599,4227,4225,374,2258,1884,1557]} 1. d4 f5 2. Nc3 Nf6 3. Bg5 d5 4. e3 Be6 5. h4 {[#]} h5 $146 (5... Bf7 $11 {keeps the balance.}) ({Predecessor:} 5... Bf7 6. h5 h6 7. Bxf6 gxf6 8. g4 fxg4 9. Qxg4 Rg8 10. Qf3 Qd6 11. O-O-O Nd7 12. e4 dxe4 13. Nxe4 {1-0 (41) Jumabayev,R (2625)-Yakubboev,N (2587) Xingtai 2019}) 6. Nf3 {A80: Dutch Defence: Unusual White second moves.} Nbd7 7. Ne2 Bf7 8. Nf4 {White is better.} Ng4 (8... c6 $16) 9. c4 $18 c6 {[#]} 10. cxd5 Qa5+ 11. Qd2 Qxd2+ 12. Nxd2 cxd5 13. Rc1 e5 14. dxe5 Ngxe5 15. Bb5 a6 16. Ba4 (16. Be2 $16) 16... b5 17. Bd1 $40 {[%mdl 128] White has strong attack.} Bb4 {Black wants to play ...Nc4.} 18. a3 {[%cal Ba2a3,Ba3a4][%mdl 32]} Ba5 19. b4 Bd8 20. Nf3 Nc4 21. a4 Bb6 22. Nd4 Bxd4 23. exd4 O-O 24. O-O g6 (24... bxa4 $16 25. Bxa4 Nb8) 25. a5 Rac8 26. Nd3 (26. Re1 $18) 26... Rfe8 $16 27. Bf3 Nd6 (27... Nb8 $16) 28. Nc5 $18 Nxc5 29. dxc5 ({Much less strong is} 29. bxc5 $6 Nb7 $14) 29... Ne4 30. Be3 d4 31. Bxd4 Nd2 32. Rfd1 Nxf3+ 33. gxf3 Bd5 34. Kg2 Bc6 (34... Bb3 {was worth a try.}) 35. Be3 Rcd8 36. Bg5 Rxd1 37. Rxd1 {[%mdl 4096] Endgame KRB-KRB} Kf7 38. Kg3 Re6 39. Be3 Re7 40. Kf4 Re6 41. Rd8 Re8 42. Rd3 Re6 43. Rd8 Re8 $1 {[%cal Re8d8]} 44. Rxe8 (44. Rd2 $18) 44... Kxe8 {KB-KB} 45. Ke5 {[#] Threatens to win with Kd6.} Bxf3 $2 {[%mdl 8192] A mistake that costs the game.} (45... Kd7 $16) 46. Kd6 Kd8 47. Bf4 Kc8 {and the idea ...Kb7 leaves Black hopeful.} 48. c6 Be4 49. Kc5 Bf3 50. Kb6 {Weighted Error Value: White=0.20/Black=0.19} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.3"]
[White "Petrov, Maksim"]
[Black "Anfinogenov, Artem"]
[Result "0-1"]
[ECO "E20"]
[WhiteElo "1568"]
[BlackElo "2032"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,64,-2,-19,5,5,0,37,38,27,32,213,209,207,207,207,205,179,-34,-33,-33,-35,-61,-65,-67,-61,-51,-51,-47,-49,-131,-116,-116,-77,-56,0,-129,-53,-58,-63,-38,-46,-45,-22,-41,-24,-40,-34,-45,-43,-55,-57,-95,-119,-183,-187,-1128,-1106]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 c5 5. d5 b5 6. e4 {E20: Nimzo-Indian: 4 g3 and 4 f3.} O-O 7. Bg5 {7.Nh3 gains popularity.} Re8 (7... d6 {is more complex.} 8. dxe6 fxe6 9. cxb5 d5 10. Qb3 Bb7) 8. dxe6 {White is slightly better.} ({Of course not} 8. cxb5 exd5 9. Nge2 Bb7 $15) 8... Rxe6 {[#]} 9. cxb5 $146 {Bc4 is the strong threat.} ({Predecessor:} 9. Nge2 h6 10. Bd2 Bb7 11. Nf4 Re8 12. Be2 bxc4 13. O-O Nc6 14. Bxc4 Ne5 15. Be2 {½-½ (44) Zacurdajev,M (2260)-Smirnov,A (2421) St Petersburg 2004}) 9... Nxe4 $2 (9... d5 $14) 10. Bxd8 $18 Nxc3+ 11. Kf2 Nxd1+ 12. Rxd1 {Strongly threatening a3.} Re8 {[#]} 13. Bc4 $2 d5 $1 $15 {[%cal Rd5c4]} ({Reject} 13... Rxd8 $6 14. Bd5 $16) 14. Bxd5 Rxd8 15. Bxf7+ Kxf7 16. Rxd8 Nd7 $1 17. Nh3 Ba5 {[%mdl 1024] Black has compensation.} 18. Rh8 h6 19. g4 (19. a4 $15) 19... Nf8 20. Nf4 Bc7 21. Nd5 Ba5 (21... Bd6 $15) 22. Nf4 $1 $17 Bd7 (22... a6 $17 23. b6 Bxb6) 23. a4 $1 $15 Be8 24. h4 Bd2 25. Nd5 Rd8 $36 {[%mdl 2048] Black is more active.} 26. Nc7 {Black must now prevent Rxf8+!} Rc8 27. Nxe8 Rxe8 28. Rd1 Be3+ 29. Kg3 g6 30. g5 {[#]} h5 31. Rd6 (31. Rh6 $17 {was worth a try.}) 31... Bd4 $19 {[%mdl 64] And now ...Be5+ would win. Double Attack} 32. Rh6 $2 (32. Rxf8+ Rxf8 33. f4) 32... Be5+ {[%mdl 64] Double Attack.  Weighted Error Value: White=0.48/Black=0.20} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.4"]
[White "Moya Albaladejo, Jose Antonio"]
[Black "Kimsanboyev, Axadxon"]
[Result "1/2-1/2"]
[ECO "B31"]
[WhiteElo "1923"]
[BlackElo "1636"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,64,0,0,0,0,7,29,3,9,8,10,-57,-54,-57,-56,-55,-40,-51,-19,-33,-13,-22,-10,-42,-39,-69,104,93,127,105,152,153,150,152,191,76,67,74,70,-25,60,0,30,12,19,-16,-16,-19,-8]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Re1 O-O 7. d4 d5 8. e5 Ne4 9. Bxc6 bxc6 10. Be3 $1 {[%mdl 4] now scores much better than the old 10.Nbd2. B31: Sicilian: 2...Nc6 3 Bb5 g6.} cxd4 11. cxd4 Rb8 12. b3 {White has an edge.} f6 13. Nbd2 Bg4 {[#]} 14. Qc2 $146 (14. exf6 $11 Bxf6 15. Rc1) ({Predecessor:} 14. exf6 Rxf6 15. Qc1 Bxf3 16. Nxf3 Rc8 17. b4 Qd6 18. b5 c5 19. dxc5 Nxc5 20. Bd4 {½-½ (41) Krykun,Y (2371)-Andrianov,N (2408) Charlotte 2020}) 14... Nxd2 $15 {[%mdl 64] [#] Overworked Piece} 15. Nxd2 fxe5 16. dxe5 Bxe5 17. Bxa7 Bxa1 (17... Bxh2+ $5 18. Kxh2 Qc7+ {[%mdl 64] Double Attack} 19. Kg1 Qxa7 $17) 18. Bxb8 Bd4 19. Bg3 Qb6 {[%cal Rd4f2]} 20. Nf1 e5 21. Ne3 Bxe3 (21... Be6 $15 {stays ahead.}) 22. Rxe3 $16 e4 23. Bd6 {Black must now prevent Bc5.} Rc8 {[#]} 24. Bc5 $1 {[%cal Rc5b6]} Qc7 25. b4 Qg7 {( -> ...Qa1+)} 26. h3 (26. Qd2 $18 {is more deadly.}) 26... Qa1+ 27. Kh2 Qe5+ 28. g3 (28. f4 $14 Qxf4+ 29. Kg1) 28... Be6 (28... Qh5 $1 $11 29. h4 g5) 29. Qd2 (29. a4 $14) 29... Qh5 (29... Qf5 $5 {[%cal Rf5h3]}) 30. h4 Qg4 {The position is equal.} 31. Qe2 Qxe2 32. Rxe2 Ra8 {Weighted Error Value: White=0.33/Black=0.32} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.5"]
[White "Zavarsky, Juraj"]
[Black "Zakharova, Evgeniya"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "1975"]
[BlackElo "2045"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,64,18,13,35,35,56,45,56,59,47,46,48,33,39,35,45,-46,0,-14,-4,-9,-6,-11,12,-71,-56,-50,-27,-35,-48,-52,5,-87,-129,-89,-79,-88,-17,-10,-12,-12,-11,-31,0,-13,-2,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 O-O 5. a3 Be7 6. g3 d6 7. Bg2 Nbd7 {E11: Bogo-Indian.} 8. O-O e5 9. Qc2 a5 {White is slightly better.} 10. b3 {[#]} Re8 $146 ({Predecessor:} 10... c6 11. Bb2 Qc7 12. c5 exd4 13. cxd6 Bxd6 14. Nxd4 Re8 15. Nc4 Bf8 16. Bc1 Nb6 {½-½ (23) Strebkovs,A (2336)-Vlasak,L (2366) Frydek Mistek 2015}) 11. Bb2 Bf8 12. e3 c6 13. dxe5 dxe5 14. Ng5 (14. Bc3 $14) 14... h6 15. Nge4 (15. Ngf3 {keeps more tension.} Bd6 16. Rfd1 Qe7 17. Nh4 g6 18. Ne4) 15... Nxe4 16. Nxe4 f5 17. Nc3 e4 18. f3 {[#]} (18. Na4 $11) 18... exf3 $1 $17 19. Bxf3 Ne5 20. Na4 Nxf3+ 21. Rxf3 b5 {[#]} (21... Be6 $15 22. Rf2 Qg5) 22. cxb5 (22. Rd1 $1 $11 {was the only way to keep the balance.} Qe7 23. Nb6) 22... cxb5 23. Rd1 Qe7 24. Nc3 {[%cal Ba4c3,Bc3d5,Bd5b6][%mdl 32]} Bb7 (24... Qb7 $17 25. Nd5 Rd8) 25. Nd5 $11 Qe4 26. Qxe4 fxe4 27. Rf5 Rac8 28. Nb6 {The position is equal.} Rc2 29. Bd4 b4 30. axb4 axb4 31. Ra1 Bc8 32. Nxc8 Rexc8 {Weighted Error Value: White=0.22/Black=0.15} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.6"]
[White "Vasquez, Georges"]
[Black "Kaydanovich, Marina"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1864"]
[BlackElo "1737"]
[Annotator "NA RC"]
[PlyCount "84"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nf3 Bd6 5. Bg3 Bxg3 6. hxg3 Nbd7 7. Bd3 Qe7 8. c3 h6 9. Nbd2 c5 10. Qe2 b6 11. Ne5 Bb7 12. Bb5 a6 13. Nxd7 Nxd7 14. Bxd7+ Kxd7 15. O-O-O cxd4 16. exd4 Bc6 17. Nf3 Kc8 18. Ne5 Bb5 19. Qe3 Kb7 20. Kb1 Rac8 21. Qf4 Rc7 22. Rhe1 a5 23. Rd2 a4 24. a3 Qg5 25. Re3 Qxf4 26. gxf4 Bf1 27. g3 h5 28. Re1 Bh3 29. Rh1 Bf5+ 30. Ka2 Rh6 31. Rh4 f6 32. Nf3 Be4 33. Ne1 g5 34. fxg5 fxg5 35. Rh2 Rf7 36. Ng2 Kc6 37. Ne3 Bf3 38. b3 b5 39. bxa4 bxa4 40. c4 dxc4 41. Nxc4 Bd5 42. Rc2 Kb5 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.7"]
[White "Pilimon, Zbigniew"]
[Black "Glazar, Domagoj"]
[Result "0-1"]
[ECO "D87"]
[WhiteElo "1638"]
[BlackElo "2142"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,74,0,0,18,0,6,16,31,43,41,0,0,-40,-27,-16,0,-117,-72,-286,-293,-337,-337,-312,-218,-250,-254,-238,-194,-201,-200,-185,-125,-142,-74,-74,-21,-32,-32,-38,-17,-23,-12,-204,-34,-37,35,-38,-55,-66,0,-279,-214,-435,-290,-954,-947,-29998,-29999]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. Rb1 Nc6 10. Be3 Na5 {D87: Exchange Grünfeld: Classical Line: Variations without ...cxd4.} 11. Bd3 cxd4 12. cxd4 Bd7 {The position is equal.} 13. O-O a6 {[#]} 14. f4 $146 ({Predecessor:} 14. Qd2 b5 15. Rfc1 Rc8 16. Bh6 Qb6 17. Bxg7 Kxg7 18. a4 Rxc1+ 19. Qxc1 Rc8 20. Qb2 {½-½ (27) Kopernicky,M (2057)-Graham,C (1853) Basingstoke 2018}) 14... Rc8 15. Rb4 b5 16. Qd2 f5 17. Nc3 (17. e5 $1 $11 {keeps the balance.}) 17... Nc6 (17... Qc7 {seems wilder.} 18. Ne2 fxe4 19. Bxe4 Qd6 20. Bd3 Nc6) 18. Rb3 (18. Rbb1 $17) 18... Nxd4 $19 ({Not} 18... Bxd4 19. Ne2 $17) 19. Bxd4 Bxd4+ 20. Kh1 Bg7 21. e5 Be6 22. Rb2 Qd7 23. Ne2 Rfd8 24. Rd1 h6 (24... Bd5 $19 25. Qe1 Qc6) 25. h4 Kh7 (25... Bf7 $142 26. Bc4 Qxd2 27. Rbxd2 Rxd2 28. Bxf7+ Kxf7 29. Rxd2 g5 30. hxg5 hxg5) 26. Qe3 $17 Bd5 (26... h5 $17) 27. Rbd2 e6 28. h5 $1 {[%cal Rh5g6]} Qf7 $36 {[%mdl 2048] Threatens to win with ...g5. Black has the initiative.} ({Of course not} 28... gxh5 $6 29. Bxf5+ $1 exf5 30. Rxd5 $16) 29. hxg6+ Qxg6 {[%csl Gd5][%cal Rg6g2]} 30. Ng3 $2 (30. Qh3 $11) 30... Rf8 $2 (30... Rc3 $19 {Strongly threatening ...Bf8.} 31. Nf1 Rdc8) 31. Be2 $15 {[#] Black must now prevent Bh5.} Qf7 {[#]} (31... Bxe5 $1 $15 32. Bh5 (32. fxe5 $2 f4 $19) 32... Qf6 33. fxe5 Qh4+ 34. Kg1 Rg8 35. Rxd5 exd5 36. Qa7+ {[%mdl 64] Double Attack} Kh8 37. Qxa6 Rc7 38. Qxh6+ Rh7 39. Nxf5 Rxh6 40. Nxh4 Rxh5 {[%mdl 64] Double Attack}) 32. Bh5 ({White should play} 32. Nxf5 $1 $14 Rc7 {[#]} (32... Rcd8 33. Nxg7) 33. Rxd5 $1 exd5 34. Qh3) 32... Qe7 {...b4 is the strong threat.} 33. Be2 Rf7 ({Black should try} 33... b4 $15 34. Qf2 Rc3) 34. Bd3 $2 {[%mdl 8192]} (34. Rxd5 $11 {and White is okay.} exd5 35. Rxd5) 34... Ba8 35. Be2 $2 (35. Nxf5 exf5 36. Qh3) 35... Bf8 36. Nh5 $2 (36. Qg1) 36... Qh4+ $19 37. Qh3 Qxh3+ {Weighted Error Value: White=0.94/Black=0.42} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.8"]
[White "Valenta, Vit Vaclav"]
[Black "Wollner, Bohus"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "2028"]
[BlackElo "1107"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,45,50,39,122,116,333,311,325,306,295,239,232,216,271,266,488,489,564,560,590,562,587,525,527,534,558,555,1019,728,720,689,863,601,941,852,861,766]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. c3 Nf6 6. Nbd2 {[#]} Nb8 $146 {C44: Ponziani Opening and Scotch Gambit.} (6... Be7 $14) ({Predecessor:} 6... Be7 7. O-O a6 8. Bd3 O-O 9. Re1 Re8 10. h3 Bf8 11. Nf1 g6 12. Ng3 Bg7 13. Bg5 h6 14. Be3 {1-0 (65) Duda,J (2658)-Bezold,M (2509) Berlin 2015}) 7. Bc4 c6 $2 {[#]} (7... exd4 $16 {was worth a try.} 8. Qb3 (8. cxd4 Nc6 $14) 8... d5 9. exd5 (9. Bxd5 Nxd5 10. exd5 dxc3 $16) 9... dxc3) 8. dxe5 dxe5 {White has a decisive advantage.} 9. Nxe5 Be6 10. Bxe6 fxe6 11. O-O Bd6 12. Nef3 {aiming for e5.} O-O $2 (12... Nbd7 {is a better defense.} 13. Nc4 Bb8) 13. e5 $18 {[%mdl 64] [#] Double Attack. White is clearly winning.} Bc7 14. exf6 Qxf6 15. Ne4 Qe7 16. Qe2 Nd7 17. Bg5 Qe8 18. Rad1 Bd8 19. Bxd8 Rxd8 20. Neg5 Rf6 21. Qe4 Qg6 22. Qxg6 Rxg6 23. Rfe1 {Black did not feel at home in the position after the opening.  Weighted Error Value: White=0.21/Black=0.84} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.9"]
[White "Bortnik, Timur"]
[Black "Aleksandrova, Aleksandra"]
[Result "0-1"]
[ECO "B01"]
[BlackElo "1728"]
[Annotator "NA RC"]
[PlyCount "48"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 c6 5. Bd3 e6 6. Nf3 Nd7 7. Be3 Ngf6 8. O-O Bd6 9. Ne2 Qc7 10. Ng3 Ng4 11. Ng5 Ndf6 12. Nxh7 Nxh2 13. Kxh2 Nxh7 14. Qh5 g6 15. Bxg6 fxg6 16. Qxg6+ Qf7 17. Qh6 Bd7 18. Bg5 Bf8 19. Qh4 Bg7 20. Kg1 Nxg5 21. Qxg5 Bxd4 22. Rae1 Qh7 23. Nh5 Qxh5 24. Qxh5+ Rxh5 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.23"]
[Round "6.10"]
[White "Nikitskaya, Varvara"]
[Black "Dubov, Pavel"]
[Result "1-0"]
[ECO "C21"]
[WhiteElo "1173"]
[Annotator "NA RC"]
[PlyCount "19"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 e5 2. d4 f6 3. dxe5 fxe5 4. Qh5+ Ke7 5. Qxe5+ Kf7 6. Bc4+ d5 7. Bxd5+ Kg6 8. Ne2 Bd6 9. Nf4+ Kh6 10. Qh5# 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.1"]
[White "Zakharova, Evgeniya"]
[Black "Obodchuk, Andrei"]
[Result "0-1"]
[ECO "E04"]
[WhiteElo "2045"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,86,13,13,-16,-10,-41,-15,-43,-16,-10,0,0,0,0,0,0,0,-6,-29,-10,0,0,0,0,0,0,0,0,0,0,175,-170,-168,-361,-343,-664,-660,-733,-729,-714,-684,-662,-593,-589,-550,-529,-469,-469,-469,-469,-469,-477,-469,-469,-469,-719,-693,-690,-697,-1029,-1029,-1011,-989,-1018,-931,-1017,-1001,-4133,-2889,-2005,-2246,-2291,-2277,-1751,-1748]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. g3 dxc4 5. Bg2 a6 6. a4 Nc6 7. O-O Rb8 8. Na3 {E04: Open Catalan: 5 Nf3.} Bxa3 9. bxa3 O-O 10. Qc2 {[#] The position is equal.} b5 $146 ({Predecessor:} 10... b6 11. Qxc4 Na5 12. Qc2 Bb7 13. Bf4 Rc8 14. Rac1 Be4 15. Qb2 Qd7 16. Bg5 Qd5 17. Bxf6 gxf6 {1-0 (51) Panesso Rivera,H (2423)-Vera Siguenas,D (2503) Havana 2018}) 11. axb5 axb5 12. a4 b4 13. Qxc4 Na5 {[%cal Ra5c4]} 14. Qd3 Bb7 15. Nd2 Bxg2 16. Kxg2 c5 17. dxc5 Qxd3 18. exd3 Rfd8 $36 {[%mdl 2048] Black is pushing.} 19. Nc4 Nb3 {[%cal Rb3a1]} 20. Bf4 {c6 is the strong threat.} Rbc8 21. Rab1 Nxc5 (21... Rxd3 $11 22. Nb6 Rxc5) 22. Ne5 $4 {[%mdl 8192] [#]} (22. Nb6 $1 $18 {[%cal Rb6c8] was the only winning move.} Rc6 23. Rfc1 $1) 22... Nd5 $1 $19 ({Stronger than} 22... Nxd3 23. Nxd3 Rxd3 24. Rxb4 $11) 23. Rfc1 $2 (23. Be3) 23... f6 ({Weaker is} 23... Nxa4 24. Nc6 $15) 24. Nc6 (24. Nf3 Nxd3 25. Rxc8 Rxc8 26. Be3) 24... Rxc6 {Black is clearly winning.} 25. d4 Nxf4+ {[%mdl 64] Discovered Attack} 26. gxf4 Rxd4 27. a5 b3 28. a6 Ra4 29. Rxb3 Raxa6 30. Rbc3 Ra5 31. Kf3 Kf7 32. Ke3 h6 33. h4 Rb5 34. Ra1 (34. Rc4 $142) 34... Rb3 35. Ra7+ Kg6 36. h5+ Kf5 37. Rxb3 Nxb3 38. Rxg7 {[%mdl 4096] Endgame KRN-KR} Rc3+ 39. Ke2 Rh3 40. Rb7 Nd4+ 41. Kd2 Kxf4 42. Rb4 e5 43. Rb6 Kf5 {Weighted Error Value: White=0.68/Black=0.16} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.2"]
[White "Kimsanboyev, Axadxon"]
[Black "Gurbanov, Andrei"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1636"]
[BlackElo "2252"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,78,5,4,-9,-1,-16,-4,-28,-30,-23,0,0,0,0,-9,-16,-10,0,-10,-8,-7,-14,0,-17,-10,-25,-26,-34,-6,-5,0,-45,-42,-53,-50,-162,-81,-214,-211,-211,-209,-210,-220,-266,-265,-419,-335,-350,-256,-291,-261,-564,-411,-550,-562,-614,-586,-893,-786,-1279,-1223,-1238,-1150,-1737,-1753,-1593,-1522,-1870,-1751]} 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. c3 e6 5. Nd2 Nc6 6. Bd3 Bd6 7. Bxd6 {The main line 7.Bxd6 scores better than 7.Bg3. D00: 1 d4 d5: Unusual lines.} Qxd6 8. f4 O-O 9. Ngf3 {The position is equal.} cxd4 10. cxd4 Nb4 11. Bb1 b6 12. a3 Nc6 13. Bd3 a5 14. Qe2 Ne7 15. O-O Bb7 16. Rac1 {[#]} Rac8 $146 ({Predecessor:} 16... Nf5 17. Ne5 Rfc8 18. Qf3 Rc7 19. g4 Nh4 20. Qh3 Ng6 21. Ndf3 Rac8 22. Rxc7 Rxc7 23. Nxg6 hxg6 {0-1 (51) Gulko,B (2620)-Comp Virtual Chess Boston 1995}) 17. Nb3 Ne4 18. Rxc8 Rxc8 19. Rc1 Rxc1+ 20. Nxc1 Qc7 21. Nb3 Nf5 {[%cal Be7f5,Bf5d6,Bd6c4][%mdl 32]} 22. g4 Nfd6 23. Kg2 (23. Qd1 $15) 23... f6 (23... a4 $19 24. Nbd2 Qc1) 24. h3 {This costs White the game.} (24. Nbd2 $17 {was worth a try.}) 24... a4 $19 25. Nbd2 Qc1 26. Nf1 {[#]} Nc4 $1 27. Bxc4 dxc4 28. Kh2 (28. Ng3 {is a better defense.}) 28... Bd5 29. Ng3 b5 30. Nxe4 Bxe4 31. Qd2 $2 {[#]} (31. g5 Bxf3 {[%mdl 64] Overworked Piece} 32. Qxf3 Qxb2+ {[%mdl 64] Double Attack} 33. Kg1 Qxa3 34. Qa8+ Kf7 35. Qb7+ Qe7 36. Qxb5) 31... Qf1 32. Ng1 h6 {Black is clearly winning.} 33. Qe2 Qc1 34. h4 b4 35. axb4 c3 36. bxc3 a3 37. Nf3 Qc2 38. Qxc2 Bxc2 39. Ne1 Be4 {Weighted Error Value: White=0.82/Black=0.10} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.3"]
[White "Kaydanovich, Marina"]
[Black "Anfinogenov, Artem"]
[Result "0-1"]
[ECO "A70"]
[WhiteElo "1737"]
[BlackElo "2032"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,86,54,50,54,43,55,51,44,11,29,11,12,32,28,0,0,19,43,33,43,33,41,32,34,36,37,16,10,-4,27,32,63,57,73,64,125,102,102,100,121,118,147,145,144,38,70,46,149,11,0,-28,-37,-26,-37,-193,-176,-277,-248,-428,-416,-457,-444,-432,-399,-1005,-962,-852,-343,-395,-358,-1656,-453,-4918,-4276]} 1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 a6 8. a4 Bg7 {A70: Modern Benoni: 6 e4 g6 7 Nf3.} 9. Be2 Bg4 {The modern move.} 10. a5 O-O {White is slightly better.} 11. O-O Re8 12. h3 Bxf3 13. Bxf3 Nbd7 {[%cal Bb8d7,Bd7e5,Be5g6,Bg6f4,Bf4d3][%mdl 32]} 14. Bf4 Ne5 15. Be2 {[#]} h6 $146 ({Predecessor:} 15... c4 16. Qa4 Rc8 17. Qb4 Nfd7 18. Be3 Qc7 19. Na4 Nd3 20. Bxd3 cxd3 21. Rac1 Qb8 {½-½ (61) Tudor,V (1400)-Mircea,S ICCF email 2009}) 16. Be3 g5 17. Qc2 Ng6 18. Rfe1 Qe7 {[%cal Rf6e4]} 19. Ra4 Nd7 20. Bh5 Nf4 21. Bg4 Ne5 22. Bf5 Nfd3 23. Rd1 Nb4 24. Qe2 Nd7 (24... Ng6 $14) 25. f4 gxf4 26. Bxf4 b5 27. axb6 $1 Nxb6 28. Raa1 Qf6 29. g4 (29. Rd2 $16) 29... Qe7 30. Kg2 c4 (30... Bd4 $14) 31. Be3 ({White should play} 31. Qd2 $1 $16) 31... Nd3 $1 $11 32. Rf1 Bxc3 33. bxc3 {[#]} Nxd5 34. Bxh6 $2 ({White should try} 34. Bd2 $15) 34... Nxc3 35. Qc2 (35. Qd2 $142 Nxe4 36. Qe3) 35... Qe5 $19 36. Ra3 $2 (36. Qd2 Nxe4 37. Bxe4 Qxe4+ 38. Kg3) 36... Nxe4 37. Rxd3 cxd3 38. Qxd3 Rab8 {( -> ...Rb2+)} 39. Bf4 $2 (39. Bc1) 39... Qb2+ 40. Kg1 {[#]} Qb6+ (40... Rb3 $142 $1 41. Qd5 Nc3) 41. Be3 Qb3 42. Qd4 (42. Bxe4 Qxd3 43. Bxd3 Rxe3 {[%mdl 64] Double Attack} 44. Bxa6) 42... Ng3 (42... Rb4 $142 43. Qa7 {[#]} Re7 $3 {[%mdl 512]} 44. Qa8+ Rb8 45. Qxb8+ Qxb8 46. Bxe4 Rxe4) 43. Bh7+ (43. Re1 $142) 43... Kxh7 {What a bad dream for White.  Weighted Error Value: White=0.89/Black=0.41} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.4"]
[White "Tsapalin, Sergey"]
[Black "Moya Albaladejo, Jose Antonio"]
[Result "1-0"]
[ECO "A20"]
[WhiteElo "1981"]
[BlackElo "1923"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,111,25,29,-9,-5,0,36,21,15,16,0,0,0,9,16,0,-6,-15,7,-47,-40,-50,-20,-40,-46,-80,-81,-91,-85,-94,-82,-97,-73,-83,-61,-75,-64,-90,-52,-57,-22,-16,-10,-8,-6,-10,151,144,156,162,169,169,169,162,160,159,212,197,218,175,412,412,412,412,412,411,400,387,427,408,557,517,556,433,806,802,1156,1048,1229,1604,1385,1363,2718,2613,2214,1910,1947,1777,1551,1495,29976,29977,29977,29978,29978,29979,29980,29981,29981,29982,29980,29983,29992,29993]} 1. c4 e5 2. g3 c6 3. d4 e4 4. d5 Bb4+ 5. Bd2 Qe7 6. Bxb4 {A20: English Opening: 1...e5.} Qxb4+ {[%mdl 64] Double Attack} 7. Nc3 {[#]} cxd5 $146 ({Predecessor:} 7... Nf6 8. Qd4 O-O 9. O-O-O d6 10. h3 Nbd7 11. dxc6 bxc6 12. Qxd6 Nc5 13. a3 Qa5 14. Kc2 e3 15. b4 Bf5+ 16. Kb2 Rab8 17. Nb5 Qa4 {0-1 (17) Sadovsky,A (2416)-Petrov,N (2610) Yaroslavl 2019}) 8. cxd5 {White is slightly better.} Nf6 9. Qd2 O-O $1 10. Bg2 Re8 $1 11. Rc1 Na6 {[%cal Bb8a6,Ba6c5,Bc5b3,Bb3a5,Ba5c4][%mdl 32]} 12. a3 Qb3 13. Qc2 Nc5 {[#] And now ...Nd3+! would win.} 14. Qxb3 (14. Nxe4 $1 $11 Nfxe4 15. Bxe4 Rxe4 16. Qxc5) 14... Nxb3 $15 15. Rd1 a6 16. d6 b5 17. h4 Bb7 18. Nh3 Na5 19. Rd4 Nc4 20. Ng5 {[%cal Rc3e4]} Nxb2 21. Ngxe4 Nxe4 22. Nxe4 Rac8 23. O-O Bxe4 24. Bxe4 Rc3 25. Bf5 Rd8 26. Rb1 Na4 27. Bxd7 $1 Rxd7 $2 {[#] Black is on the road to losing.} (27... Rxa3 $11 28. Bc6 Rc3) 28. Rxa4 $1 $16 {[%mdl 512]} Rxd6 {[#]} (28... Rc6 29. Rxb5) 29. Rxb5 $1 $11 {[%mdl 4608] Endgame White wants to mate with Rb8+. KRR-KRR} g6 (29... h6 30. Rb8+) 30. Rb8+ Kg7 31. Ra8 Rcc6 32. Ra7 h5 (32... h6 $16 {might work better.} 33. Kg2 Re6) 33. Kg2 $18 Rb6 34. Rc4 Rb3 $2 (34... Re6 {was worth a try.} 35. Rf4 Rf6 36. Rxf6 Kxf6) 35. Rf4 Rf6 36. Rxf6 Kxf6 37. Rxa6+ {KR-KR} Kf5 38. e3 f6 39. a4 {[%cal Ba3a4,Ba4a5,Ba5a6,Ba6a7][%mdl 32]} Ra3 40. a5 Ra4 41. Kf3 Ra2 (41... g5 $142 42. Ra8 g4+ 43. Kg2 Ke4) 42. Ra8 Ke6 43. a6 Kf7 44. a7 Kg7 45. e4 Kh7 46. Ke3 Kg7 47. f3 Kh7 48. Kf4 Kg7 49. g4 Ra3 50. g5 {White mates.} fxg5+ 51. Kxg5 Ra5+ 52. Kf4 Ra3 53. e5 Ra4+ 54. Kg3 Ra3 55. e6 Ra4 56. e7 {Weighted Error Value: White=0.14/Black=0.31} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.5"]
[White "Gedgafov, Chamal"]
[Black "Valenta, Vit Vaclav"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2202"]
[BlackElo "2028"]
[Annotator "TA"]
[PlyCount "213"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,213,-24,-10,-27,-27,-43,-29,-24,-18,-3,0,-93,-89,-86,-81,-91,-80,-163,-84,-102,-80,-80,-39,-59,0,-81,-78,-87,-62,-71,-64,-108,-115,-210,-210,-216,-203,-325,-275,-438,-431,-375,-235,-230,-227,-231,-226,-413,-306,-313,-252,-324,-322,-324,-324,-401,-384,-353,-229,-328,-324,-323,-312,-331,-325,-328,-325,-305,-303,-439,-239,-459,-454,-452,-425,-408,-394,-440,-441,-435,-416,-331,-280,-488,-479,-474,-466,-426,-414,-420,-410,-396,-389,-486,-471,-470,-460,-462,-446,-526,-495,-493,-456,-541,-516,-511,-481,-488,-453,-706,-684,-1427,-1388,-12838,-1373,-12837,-12836,-2213,-745,-537,-195,-195,-195,-195,-195,-195,-195,-195,-195,-195,-195,-195,0,-195,-187,-187,-187,-187,-187,-195,-195,-195,0,-195,-195,-195,-195,-195,-195,-195,-195,-195,-56,-56,-56,-56,-56,-56,-56,-97,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,0,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,-43,-50,-50,0,-50,0,-50,0,-43,0,-111,-111,-112,-112,-112,0,-112,0,-112]} 1. Nf3 Nf6 2. b3 c5 3. Bb2 g6 4. e4 Bg7 5. e5 Nd5 6. c4 {A05: Réti Opening: 1 Nf3 Nf6.} Nc7 7. Nc3 O-O {[#]} 8. d4 $146 {Black has an edge.} ({Predecessor:} 8. g3 Nc6 9. Na4 b6 10. Bg2 Bb7 11. O-O Ne6 12. Re1 Qc7 13. a3 Ncd4 14. Nc3 Nxf3+ 15. Bxf3 Bxf3 16. Qxf3 {0-1 (33) Montalvao,P (1382)-Bueno,F (1662) Brasilia 2017}) 8... Nc6 9. dxc5 Nxe5 10. Na4 (10. Nxe5 $11 Bxe5 11. Qe2) 10... Nxf3+ $17 11. Qxf3 Bxb2 12. Nxb2 Ne6 13. Nd3 (13. Be2 $17) 13... Nxc5 14. O-O-O Nxd3+ 15. Bxd3 Qa5 16. Kb1 Qb4 (16... Qa3 $15) 17. Kb2 (17. h4 $1 $11 {keeps the balance.}) 17... a5 18. a3 Qc5 19. Rhe1 d5 20. Qxd5 Qxf2+ 21. Re2 (21. Bc2 $17) 21... Qf6+ $19 22. Re5 Be6 23. Qe4 (23. Qd4 $142) 23... Rad8 24. Bc2 (24. Kc2 {keeps fighting.}) 24... Rxd1 25. Bxd1 Rc8 26. Qd4 a4 $1 27. Bf3 axb3 28. Re4 $2 (28. c5) 28... Bxc4 29. Qxf6 exf6 {[%mdl 4096] Endgame KRB-KRB} 30. Rd4 b5 31. Bd1 Re8 32. a4 Ra8 33. axb5 Bxb5 34. Bf3 (34. Kxb3 {is a better defense.} Bc6 35. g3) 34... Ra7 35. Kxb3 Rc7 36. Rd6 Kg7 37. Kb4 Bd7 38. Ka5 Be6 39. Rd4 (39. Bc6 $142) 39... Rc4 (39... f5 $142 40. Rd2 Kf6) 40. Rd2 (40. Rxc4 Bxc4 41. g3) 40... f5 41. Kb5 Rc3 42. Kb4 Rc7 43. Kb5 Kf6 44. Bc6 Ra7 45. Kc5 Ra2 46. Rd3 (46. Rxa2 Bxa2 47. Kd4) 46... Rc2+ 47. Kd6 Bc4 48. Rd1 Rc3 49. Re1 Rd3+ 50. Kc5 Be6 51. Re2 h5 52. Bb5 Rd5+ 53. Kb4 h4 54. Bc6 Rd3 55. Bb5 Rd1 56. Bc6 Rc1 57. Ba8 Ra1 58. Bc6 h3 59. gxh3 (59. g3 $142 g5 60. Kc5) 59... Ra2 60. Rxa2 Bxa2 {KB-KB} 61. Kc3 Ke5 (61... Kg5 $142 62. Kd2 Kh4) 62. Kd3 Bd5 63. Be8 g5 (63... Kf4 $142 64. Kd4 Be6) 64. Ke3 f6 $2 (64... f4+ 65. Kf2 Be6) 65. Kf2 Be6 66. h4 gxh4 67. Bb5 f4 68. Bd3 Bf5 69. Be2 Be4 70. Bg4 Bf5 $2 (70... Kd4 $19 71. Be6 Ke5) 71. Bf3 $2 (71. Be2 $1 $11 Bc2 72. Bb5) 71... Bh3 72. Bc6 Bg4 73. Bb7 Bd1 74. Bc8 Bc2 75. Bg4 Bf5 $2 (75... Bb3 $19 76. Bd7 Be6) 76. Bd1 $2 (76. Be2 $11 {and White is okay.} Bc2 77. Bb5) 76... Bh3 77. Ba4 Be6 78. Bc2 Bd5 79. Bd3 Kd4 80. Bf5 f3 ({Black should play} 80... Ba8 $19 81. Bd7 Bd5) 81. Bc8 Ke4 82. Bd7 Kf4 83. Bc8 Be4 84. Bd7 f5 (84... Bb7 $17 85. Bh3 f5) 85. Bb5 $15 Bd5 {Threatens to win with ...Be4.} 86. Ba6 Bf7 87. Bb5 Bh5 88. Bc4 Bg4 89. Bd5 Bh5 90. Bc4 Kg4 {Strongly threatening ...Kh3.} 91. Kg1 Be8 92. Bd3 Bc6 93. Bc4 Kf4 94. Kf2 Ba4 95. Bd5 Bd1 {White must now prevent ...Kg4.} 96. Be6 Kg4 97. Kg1 Bc2 {[#] And now ...Kh3 would win.} 98. Bc4 Be4 99. Bb5 Kf4 100. Kf2 Kg4 {aiming for ...Kh3.} 101. Kg1 Bc2 102. Bc4 $1 Bd1 103. Bb5 (103. Be6 $11 {remains equal.}) 103... Be2 $17 104. Bd7 Bd3 {...Kh3 is the strong threat.} 105. Bc6 Be4 106. Bb5 Kf4 {[#] ( -> ...Ke3)} 107. Kf2 {And White is the lucky defender.  Weighted Error Value: White=0.53/Black=0.19} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.6"]
[White "Glazar, Domagoj"]
[Black "Nikitskaya, Varvara"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2142"]
[BlackElo "1173"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,47,43,40,35,49,47,45,0,0,-7,0,-73,0,0,6,10,34,32,37,0,478,469,477,481,530,530,531,526,907,787,912,843,825,826,997,293]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 Qb6 {6...h6 is becoming the main line.} 7. Qc2 Ne4 8. Nxe4 {D35: Queen's Gambit Declined: Exchange Variation.} dxe4 9. Qxe4+ Be6 10. O-O-O {Hoping for Bc4.White is slightly better.} Qa5 $1 {[%cal Ra5g5]} 11. Nf3 {Threatens to win with Bc4.} Qxa2 12. Bd3 {[#]} (12. Ne5 $11 {remains equal.} Qa1+ 13. Kc2 (13. Qb1 $2 Qxb1+ 14. Kxb1 f6 $19 {[%mdl 64] Double Attack}) 13... Qa4+ 14. Kc1) 12... Qa1+ $146 (12... Nd7 $17 {...h6 is the strong threat.} 13. Bb1 Qa1) ({Predecessor:} 12... f5 13. Qe5 Nd7 14. Qc7 Bb4 15. Ne5 Nxe5 16. dxe5 O-O 17. Be7 Rfc8 18. Qxc8+ Rxc8 19. Bxb4 {0-1 (35) Lysiak,M (2349)-Shapiro,D (2530) Chess.com INT 2020}) 13. Kc2 $11 Qa4+ 14. Kd2 Qb4+ 15. Ke2 Nd7 16. Nd2 h6 $2 {[%mdl 8192] [#]} (16... Nb6 $11 {and Black stays safe.}) 17. Qxe6+ $1 $18 {[%mdl 512] White is clearly winning.} Be7 18. Bxe7 Qxd2+ 19. Rxd2 {White threatens Bg6! and mate.} fxe6 20. Bh4 b5 21. Rc1 Rc8 {[#]} 22. Bxb5 $1 O-O (22... g5 23. Bg3) 23. Rxc6 Rb8 24. Rc4 $2 {Weighted Error Value: White=0.22/Black=0.89} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.7"]
[White "Aleksandrova, Aleksandra"]
[Black "Zavarsky, Juraj"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "1728"]
[BlackElo "1975"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,84,-7,-1,-86,-80,-125,-82,-77,-93,-86,-82,-113,-107,-133,-22,-63,-44,-327,-58,-139,-127,-147,-135,-136,-147,-130,0,21,47,37,45,-81,0,-32,-33,-619,-627,-597,-628,-922,-914,-876,-286,-291,-268,-517,-516,-516,-507,-635,-586,-1302,-1188,-29977,-29978,-29978,-29979,-29979,-29980,-29980,-29981,-29987,-29982,-29994,-29995,-29995,-29995,-29995,-29981,-29985,-29986,-29997,-29998,-29998,-29998,-29998,-29999]} 1. e4 c5 2. f4 e6 3. Nf3 a6 4. a4 Nc6 5. c3 d5 {[#]} 6. exd5 $146 {B21: Sicilian: 2 f4 and Morra Gambit.} (6. d3 $11) ({Predecessor:} 6. d3 dxe4 7. dxe4 Qxd1+ 8. Kxd1 Nf6 9. Nbd2 Be7 10. Bd3 O-O 11. Nc4 Rd8 12. Kc2 {1-0 (38) Probola,R (2155)-Derus,J (1895) Wojewodztwo Lubelskie 2013}) 6... exd5 $17 ({Much weaker is} 6... Qxd5 $6 7. d3 $11) 7. Bd3 c4 8. Bc2 {Black is better.} Bc5 9. d4 cxd3 $1 10. Qxd3 Nge7 $1 11. Qe2 h6 (11... O-O $1 $17 {White must now prevent ...Nf5.} 12. b4 Bb6) 12. b4 Bb6 13. Ba3 $2 {[%mdl 8192]} ({White should play} 13. a5 $15 Ba7 14. Be3) 13... Bg4 $2 (13... O-O $1 $19 14. Kd1 d4) 14. h3 (14. b5 $15 Na5 15. Nbd2) 14... Bxf3 15. Qxf3 O-O $1 16. Nd2 d4 {Strongly threatening ...dxc3.} 17. c4 a5 $2 (17... Re8 $1 $17 18. Kd1 d3 19. Qxd3 Qxd3 20. Bxd3 Rad8) 18. b5 $11 Nb4 19. Bxb4 axb4 20. Qd3 (20. Bd3 $1 $14) 20... Ng6 (20... g6 {is more complex.} 21. Bb3 Nf5 22. O-O Re8 23. Ne4 Qe7) 21. O-O Re8 $36 {[%mdl 2048] Threatens to win with ...Re3. Black has the initiative.} 22. Rae1 {[%mdl 8192] White is on the road to losing.} (22. c5 $15 Bxc5 23. Nc4) 22... Re3 $19 23. Rxe3 dxe3 24. a5 Qxd3 25. Bxd3 {[#]} e2+ $2 (25... Nxf4 $1 {[%mdl 512]} 26. axb6 Nxd3) 26. axb6 exf1=Q+ ({Don't do} 26... exf1=N 27. Bxf1 Ra2 28. Ne4 $19) 27. Kxf1 $2 {[#]} (27. Bxf1 {was the only defense.} Ra2 28. Nb3) 27... Rd8 $1 28. Bxg6 {Hoping for Be4.} Rxd2 {[%mdl 4096] Endgame KR-KB} ({Stronger than} 28... fxg6 29. Ke2 $11) 29. Be4 Rd4 30. Bxb7 {aiming for Bd5.} b3 {And now ...b2 would win.} 31. Bc8 b2 {Black mates.} 32. Bf5 Rxf4+ {[%mdl 64] Double Attack} 33. Ke2 Rxf5 {KR-KP} 34. b7 b1=Q 35. b8=Q+ Kh7 36. Qc7 Qe4+ {[%mdl 64] Double Attack} 37. Kd2 Qd4+ 38. Kc2 Rc5 39. Qxf7 Rxc4+ 40. Kb1 Qd3+ 41. Ka1 Rc1+ {[%mdl 64] Discovered Attack} 42. Ka2 Rc2+ {[%mdl 64] Double Attack.  Weighted Error Value: White=1.06/Black=0.37} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.8"]
[White "Vasquez, Georges"]
[Black "Petrov, Maksim"]
[Result "0-1"]
[ECO "C00"]
[WhiteElo "1864"]
[BlackElo "1568"]
[Annotator "NA RC"]
[PlyCount "144"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O c5 5. d3 Nc6 6. Nbd2 b6 7. e4 Bb7 8. e5 Nd7 9. Re1 Qc7 10. Qe2 h6 11. Nf1 g5 12. h3 Bg7 13. N1h2 Ndxe5 14. Nxe5 Qxe5 15. Qxe5 Nxe5 16. f4 gxf4 17. gxf4 Nd7 18. Ng4 O-O-O 19. c3 d4 20. Bxb7+ Kxb7 21. c4 h5 22. Nh2 Rde8 23. Nf3 Rhg8 24. Kf2 f5 25. Bd2 e5 26. fxe5 Bxe5 27. Rg1 Bf6 28. Rxg8 Rxg8 29. Re1 Rg7 30. Bf4 Re7 31. Rg1 Be5 32. Re1 Bf6 33. Rg1 Nf8 34. Bd6 Rf7 35. Rg8 Ne6 36. Rg6 Ng7 37. Bf4 Ne6 38. Be5 Bxe5 39. Rxe6 Bf6 40. Kg3 Kc7 41. Kf4 Kd7 42. Re2 Kd6 43. Ng5 Bxg5+ 44. Kxg5 f4 45. Kxh5 Rg7 46. Re4 Rg3 47. h4 f3 48. Rf4 Ke5 49. Rf8 Rg2 50. Rxf3 Rxb2 51. Kg4 Rxa2 52. Kg3 Re2 53. Kg4 a5 54. Rf8 Re3 55. Rb8 Rxd3 56. Rxb6 a4 57. h5 Rd2 58. Rc6 a3 59. Rxc5+ Ke4 60. h6 a2 61. Ra5 Rh2 62. c5 Rxh6 63. Rxa2 d3 64. Kg3 Ke3 65. Ra3 Ke2 66. Ra8 Re6 67. c6 d2 68. c7 d1=Q 69. c8=Q Qg1+ 70. Kf4 Qe3+ 71. Kf5 Qe5+ 72. Kg4 Rg6+ 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.9"]
[White "Wollner, Bohus"]
[Black "Nazarov, Nicolai"]
[Result "0-1"]
[ECO "D32"]
[WhiteElo "1107"]
[BlackElo "1770"]
[Annotator "NA RC"]
[PlyCount "58"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Nf3 c5 3. c4 e6 4. Nc3 dxc4 5. e3 cxd4 6. exd4 Bb4 7. Bxc4 h6 8. O-O Nf6 9. Re1 O-O 10. a3 Ba5 11. b4 Bb6 12. Bb2 a6 13. Ne4 Nxe4 14. Rxe4 Bd7 15. Qc2 Bc6 16. Ree1 Bxf3 17. gxf3 Bxd4 18. Bxd4 Qxd4 19. Rad1 Qf4 20. Qe4 Qxe4 21. fxe4 Nc6 22. f3 Ne5 23. Be2 Rfd8 24. Rxd8+ Rxd8 25. Kf2 Rd2 26. Kg1 Ra2 27. f4 Ng6 28. f5 exf5 29. exf5 Nh4 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "7.10"]
[White "Dubov, Pavel"]
[Black "Bortnik, Timur"]
[Result "0-1"]
[ECO "B07"]
[Annotator "NA RC"]
[PlyCount "140"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d6 2. Nf3 Nf6 3. Nc3 c6 4. d3 Qa5 5. Be2 e5 6. O-O Be7 7. Bd2 Qc7 8. Bg5 Be6 9. d4 Nbd7 10. Bxf6 Nxf6 11. d5 Bg4 12. h3 Bh5 13. dxc6 bxc6 14. Rb1 O-O 15. b4 Bg6 16. Bd3 Rab8 17. b5 Qa5 18. Qd2 cxb5 19. Nxb5 Qxa2 20. Ra1 Qe6 21. Rxa7 Nxe4 22. Bxe4 Bxe4 23. Nc7 Qg6 24. Qe2 Bxc2 25. Nd5 Bd8 26. Rc7 Bd3 27. Qd1 Rb1 28. Rc1 Rxc1 29. Qxc1 Bxf1 30. Qxf1 Qe6 31. Qd3 e4 32. Qb3 exf3 33. gxf3 Qxh3 34. Nf4 Qh6 35. Nd5 Re8 36. Ne3 g6 37. Qb8 Kf8 38. Qxd6+ Be7 39. Qe5 Qg5+ 40. Ng4 Qxe5 41. Nxe5 Bb4 42. Nd7+ Kg7 43. f4 Re4 44. Nb6 Rxf4 45. Nd5 Rg4+ 46. Kf1 h5 47. f3 Rd4 48. Ne3 Rd3 49. Nc2 Rxf3+ 50. Ke2 Rf4 51. Ke3 g5 52. Nd4 Rxd4 53. Kxd4 h4 54. Ke3 h3 55. Kf3 f5 56. Kg3 g4 57. Kh2 Bd6+ 58. Kh1 f4 59. Kg1 Kf6 60. Kh1 Kg5 61. Kg1 g3 62. Kh1 g2+ 63. Kg1 f3 64. Kf2 h2 65. Kxf3 g1=Q 66. Ke4 h1=Q+ 67. Kd3 Qg4 68. Ke3 Qhf3+ 69. Kd2 Qgg2+ 70. Ke1 Qff1# 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.1"]
[White "Zakharova, Evgeniya"]
[Black "Obodchuk, Andrei"]
[Result "0-1"]
[ECO "E04"]
[WhiteElo "2045"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,86,0,28,-12,-9,-54,-16,-33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,155,-172,-171,-358,-361,-677,-662,-727,-720,-716,-704,-676,-597,-604,-523,-523,-527,-527,-526,-521,-500,-474,-468,-516,-516,-670,-656,-737,-722,-929,-929,-889,-811,-929,-914,-928,-769,-1952,-1798,-1773,-1729,-1685,-1618,-1167,-1014]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. g3 dxc4 5. Bg2 a6 6. a4 Nc6 7. O-O Rb8 8. Na3 {E04: Open Catalan: 5 Nf3.} Bxa3 9. bxa3 O-O 10. Qc2 {[#] The position is equal.} b5 $146 ({Predecessor:} 10... b6 11. Qxc4 Na5 12. Qc2 Bb7 13. Bf4 Rc8 14. Rac1 Be4 15. Qb2 Qd7 16. Bg5 Qd5 17. Bxf6 gxf6 {1-0 (51) Panesso Rivera,H (2423)-Vera Siguenas,D (2503) Havana 2018}) 11. axb5 axb5 12. a4 b4 {And now ...Ba6 would win.} 13. Qxc4 Na5 14. Qd3 Bb7 15. Nd2 Bxg2 16. Kxg2 c5 17. dxc5 Qxd3 18. exd3 Rfd8 19. Nc4 Nb3 20. Bf4 {Threatens to win with c6.} Rbc8 21. Rab1 Nxc5 (21... Rxd3 $11 22. Nb6 Rxc5) 22. Ne5 $2 {[#] This move loses the game for White.} (22. Nb6 $1 $16 {[%cal Rb6c8] is necessary to keep the advantage.} Rc6 23. Rfc1 $1) 22... Nd5 $1 $19 ({Weaker is} 22... Nxd3 23. Nxd3 Rxd3 24. Rxb4 $11) 23. Rfc1 $2 (23. Be3) 23... f6 ({Less strong is} 23... Nxa4 24. Nc6 $15) 24. Nc6 (24. Nf3 Nc3 25. Rxb4 Nxd3 {[%mdl 64] Double Attack} 26. Rxc3 Rxc3 27. Rb6) 24... Rxc6 {Black is clearly winning.} 25. d4 Nxf4+ {[%mdl 64] Discovered Attack} 26. gxf4 Rxd4 27. a5 b3 28. a6 Ra4 29. Rxb3 Raxa6 30. Rbc3 Ra5 31. Kf3 Kf7 32. Ke3 h6 33. h4 Rb5 34. Ra1 Rb3 35. Ra7+ Kg6 36. h5+ Kf5 37. Rxb3 Nxb3 38. Rxg7 {[%mdl 4096] Endgame KRN-KR} Rc3+ 39. Ke2 Rh3 40. Rb7 Nd4+ 41. Kd2 Kxf4 42. Rb4 e5 43. Rb6 Kf5 {Weighted Error Value: White=0.60/Black=0.17} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.2"]
[White "Kimsanboyev, Axadxon"]
[Black "Gurbanov, Andrei"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1636"]
[BlackElo "2252"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,78,0,14,0,-11,-12,-8,-29,-23,-14,0,0,13,0,0,-14,-13,-5,-5,-10,-10,-14,0,-17,-12,-33,-24,-28,-6,-8,-10,-45,-45,-44,-42,-143,-55,-208,-204,-216,-204,-201,-162,-247,-240,-389,-303,-327,-248,-302,-230,-727,-742,-852,-497,-583,-559,-794,-779,-1233,-1212,-1176,-1174,-1716,-1604,-1584,-1533,-5706,-5610]} 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. c3 e6 5. Nd2 Nc6 6. Bd3 Bd6 7. Bxd6 {7.Bxd6 scores better than 7.Bg3. D00: 1 d4 d5: Unusual lines.} Qxd6 8. f4 O-O 9. Ngf3 {The position is equal.} cxd4 10. cxd4 Nb4 11. Bb1 b6 12. a3 Nc6 13. Bd3 a5 14. Qe2 Ne7 15. O-O Bb7 16. Rac1 {[#]} Rac8 $146 ({Predecessor:} 16... Nf5 17. Ne5 Rfc8 18. Qf3 Rc7 19. g4 Nh4 20. Qh3 Ng6 21. Ndf3 Rac8 22. Rxc7 Rxc7 23. Nxg6 hxg6 {0-1 (51) Gulko,B (2620)-Comp Virtual Chess Boston 1995}) 17. Nb3 Ne4 18. Rxc8 (18. Nbd2 {is interesting.} f6 19. Nb1 Rc7 20. Rxc7 Qxc7 21. Bb5) 18... Rxc8 19. Rc1 Rxc1+ 20. Nxc1 Qc7 21. Nb3 Nf5 {[%cal Be7f5,Bf5d6,Bd6c4][%mdl 32]} 22. g4 Nfd6 23. Kg2 (23. Qd1 $15) 23... f6 (23... a4 $17 24. Nbd2 Qc1) 24. h3 $2 {This costs White the game.} (24. Nbd2 $15) 24... a4 $19 25. Nbd2 Qc1 26. Nf1 {[#]} Nc4 $1 27. Bxc4 (27. Kg1 $142) 27... dxc4 28. Kh2 (28. Kg1 $142) 28... Bd5 29. Ng3 b5 30. Nxe4 Bxe4 31. Qd2 $2 {[#]} (31. g5) 31... Qf1 {Black is clearly winning.} 32. Ng1 h6 33. Qe2 Qc1 34. h4 b4 35. axb4 c3 36. bxc3 a3 37. Nf3 Qc2 38. Qxc2 Bxc2 39. Ne1 Be4 {Weighted Error Value: White=0.98/Black=0.19} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.3"]
[White "Kaydanovich, Marina"]
[Black "Anfinogenov, Artem"]
[Result "0-1"]
[ECO "A70"]
[WhiteElo "1737"]
[BlackElo "2032"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,86,42,47,50,42,44,45,57,41,27,29,28,27,22,8,5,4,31,25,61,32,38,22,31,31,39,6,8,-22,29,30,60,60,66,54,124,106,99,92,135,115,124,135,147,16,85,29,113,-14,-10,-50,-44,-29,-40,-199,-183,-278,-284,-389,-395,-471,-452,-445,-433,-939,-938,-823,-290,-435,-427,-1217,-497,-4910,-2102]} 1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 a6 8. a4 Bg7 {A70: Modern Benoni: 6 e4 g6 7 Nf3.} 9. Be2 Bg4 {is now debated instead of 9...0-0.} 10. a5 O-O {White is slightly better.} 11. O-O Re8 12. h3 Bxf3 13. Bxf3 Nbd7 {[%cal Bb8d7,Bd7e5,Be5g6,Bg6f4,Bf4d3][%mdl 32]} 14. Bf4 Ne5 15. Be2 {[#]} h6 $146 ({Predecessor:} 15... c4 16. Qa4 Rc8 17. Qb4 Nfd7 18. Be3 Qc7 19. Na4 Nd3 20. Bxd3 cxd3 21. Rac1 Qb8 {½-½ (61) Tudor,V (1400)-Mircea,S ICCF email 2009}) 16. Be3 g5 17. Qc2 Ng6 18. Rfe1 Qe7 {[%cal Rf6e4]} 19. Ra4 Nd7 20. Bh5 Nf4 21. Bg4 Ne5 (21... b5 $142 22. axb6 Nxb6) 22. Bf5 $11 Nfd3 23. Rd1 Nb4 24. Qe2 Nd7 ({Black should play} 24... Qf6 $14) 25. f4 gxf4 26. Bxf4 b5 27. axb6 $1 Nxb6 28. Raa1 Qf6 29. g4 ({Better is} 29. Rd2 $16) 29... Qe7 (29... Qh4 $1 $11) 30. Kg2 (30. g5 $16) 30... c4 (30... Bd4 $11 {keeps the balance.}) 31. Be3 {[#]} (31. Qd2 $1 $16) 31... Nd3 $1 32. Rf1 (32. Ra2 Bxc3) 32... Bxc3 33. bxc3 {[#]} Nxd5 34. Bxh6 $2 {This costs White the game.} ({White should try} 34. Bd2 $15) 34... Nxc3 35. Qc2 (35. Qd2 $142 Nxe4 36. Qe3) 35... Qe5 $19 36. Ra3 Nxe4 37. Rxd3 cxd3 38. Qxd3 Rab8 {( -> ...Rb2+)} 39. Bf4 (39. Bc1 $142 d5 40. Rf3) 39... Qb2+ 40. Kg1 {[#]} Qb6+ $2 (40... Rb3 $1 41. Qd5 (41. Bh7+ Kxh7) 41... Nc3) 41. Be3 (41. Kh2 {might work better.} Qb2+ 42. Kg1) 41... Qb3 {Black is clearly winning.} 42. Qd4 (42. Rd1 $142) 42... Ng3 (42... Rb4 $142 43. Qa7 {[#]} Re7 $3 {[%mdl 512]} 44. Qa8+ Rb8 45. Qxb8+ Qxb8 46. Bxe4 Rxe4) 43. Bh7+ (43. Re1 $142) 43... Kxh7 {Weighted Error Value: White=0.85/Black=0.35} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.4"]
[White "Tsapalin, Sergey"]
[Black "Moya Albaladejo, Jose Antonio"]
[Result "1-0"]
[ECO "A20"]
[WhiteElo "1981"]
[BlackElo "1923"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,111,18,29,-7,-6,-13,45,6,6,6,10,3,7,6,13,0,0,-1,13,-40,-44,-44,-16,-41,-39,-84,-71,-92,-83,-90,-56,-84,-63,-73,-66,-71,-50,-85,-42,-57,-14,-14,-14,-5,-3,-20,159,169,169,163,168,154,154,154,154,154,229,203,192,186,448,445,442,443,441,433,420,405,563,527,593,463,672,654,1081,831,1637,1584,1458,1348,2168,2059,2770,2835,2562,2072,12825,12382,5824,2858,12838,12839,12839,12839,12840,12840,12839,12838,12845,12845,12845,12846,29992,29993]} 1. c4 e5 2. g3 c6 3. d4 e4 4. d5 Bb4+ 5. Bd2 Qe7 6. Bxb4 {A20: English Opening: 1...e5.} Qxb4+ {[%mdl 64] Double Attack} 7. Nc3 {[#]} cxd5 $146 (7... Nf6 $11) ({Predecessor:} 7... Nf6 8. Qd4 O-O 9. O-O-O d6 10. h3 Nbd7 11. dxc6 bxc6 12. Qxd6 Nc5 13. a3 Qa5 14. Kc2 e3 15. b4 Bf5+ 16. Kb2 Rab8 17. Nb5 Qa4 {0-1 (17) Sadovsky,A (2416)-Petrov,N (2610) Yaroslavl 2019}) 8. cxd5 {White is slightly better.} Nf6 9. Qd2 O-O $1 10. Bg2 Re8 $1 11. Rc1 Na6 {[%cal Bb8a6,Ba6c5,Bc5b3,Bb3a5,Ba5c4][%mdl 32]} 12. a3 Qb3 13. Qc2 Nc5 {[#] ...Nd3+! is the strong threat.} 14. Qxb3 ({White should play} 14. Nxe4 $1 $11 Nfxe4 15. Bxe4 Rxe4 16. Qxc5) 14... Nxb3 $15 15. Rd1 a6 16. d6 b5 17. h4 Bb7 18. Nh3 Na5 19. Rd4 Nc4 20. Ng5 {[%cal Rc3e4]} Nxb2 21. Ngxe4 Nxe4 22. Nxe4 Rac8 {And now ...Ba8 would win.} 23. O-O Bxe4 24. Bxe4 Rc3 25. Bf5 Rd8 26. Rb1 Na4 {next ...g6 is good for Black.} 27. Bxd7 $1 Rxd7 $2 {[#]} (27... Rxa3 $11 28. Bc6 Rc3) 28. Rxa4 $1 $16 {[%mdl 512] White stays focused until the end.} Rxd6 {[#]} 29. Rxb5 $1 $11 {[%mdl 4608] Endgame White wants to mate with Rb8+. KRR-KRR} g6 (29... h6 30. Rb8+) 30. Rb8+ Kg7 31. Ra8 Rcc6 32. Ra7 h5 (32... h6 $16 33. Kg2 g5) 33. Kg2 $18 Rb6 34. Rc4 Rb3 $2 (34... Rf6 {was called for.} 35. Re4 Rb3) 35. Rf4 Rf6 36. Rxf6 Kxf6 37. Rxa6+ {KR-KR} Kf5 38. e3 f6 39. a4 {[%cal Ba3a4,Ba4a5,Ba5a6,Ba6a7][%mdl 32]} Ra3 40. a5 Ra4 (40... Ra2 $142 41. Ra8 Ke6) 41. Kf3 Ra2 42. Ra8 Ke6 43. a6 Kf7 44. a7 Kg7 45. e4 Kh7 46. Ke3 Kg7 47. f3 Kh7 48. Kf4 Kg7 49. g4 Ra3 50. g5 fxg5+ 51. Kxg5 Ra5+ 52. Kf4 Ra3 53. e5 Ra4+ 54. Kg3 Ra3 55. e6 {White threatens e7 and mate.} Ra4 56. e7 {Weighted Error Value: White=0.12/Black=0.38} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.5"]
[White "Gedgafov, Chamal"]
[Black "Valenta, Vit Vaclav"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2202"]
[BlackElo "2028"]
[Annotator "TA"]
[PlyCount "213"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,213,-19,-14,-20,-16,-53,-16,-29,0,-12,0,-79,-79,-83,-82,-79,-79,-163,-93,-104,-73,-78,-34,-58,8,-92,-89,-79,-79,-72,-47,-100,-95,-212,-205,-204,-216,-320,-261,-419,-399,-355,-229,-230,-231,-233,-205,-401,-270,-287,-287,-270,-272,-287,-282,-369,-348,-343,-215,-287,-282,-268,-280,-303,-297,-302,-294,-302,-299,-372,-190,-399,-392,-387,-367,-369,-362,-341,-351,-333,-309,-282,-270,-451,-453,-440,-446,-434,-370,-372,-369,-372,-360,-437,-422,-430,-425,-416,-404,-454,-445,-442,-373,-518,-508,-515,-470,-509,-470,-500,-490,-490,-457,-6204,-197,-5631,-5031,-723,-632,-357,-197,-197,-197,-197,-197,-197,-197,-197,-197,-197,-197,-197,0,-197,-175,-175,-175,-175,-175,-197,-197,-197,0,-197,-197,-197,-197,-197,-197,-197,-197,-197,-80,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-80,-128,-80,-80,-80,-80,0,-80,-80,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,-128,0,-128,0,-128,0,-128,0,-128,-128,-128,-128,-128,0,-128,0,-135]} 1. Nf3 Nf6 2. b3 c5 3. Bb2 g6 4. e4 Bg7 5. e5 Nd5 6. c4 {A05: Réti Opening: 1 Nf3 Nf6.} Nc7 7. Nc3 O-O {[#]} 8. d4 $146 ({Predecessor:} 8. g3 Nc6 9. Na4 b6 10. Bg2 Bb7 11. O-O Ne6 12. Re1 Qc7 13. a3 Ncd4 14. Nc3 Nxf3+ 15. Bxf3 Bxf3 16. Qxf3 {0-1 (33) Montalvao,P (1382)-Bueno,F (1662) Brasilia 2017}) 8... Nc6 9. dxc5 Nxe5 10. Na4 (10. h4 $11 {remains equal.}) 10... Nxf3+ $17 11. Qxf3 Bxb2 12. Nxb2 Ne6 13. Nd3 (13. Qc3 $17 {might work better.}) 13... Nxc5 14. O-O-O Nxd3+ 15. Bxd3 Qa5 16. Kb1 Qb4 (16... Qa3 $15) 17. Kb2 (17. h4 $1 $11) 17... a5 18. a3 Qc5 19. Rhe1 d5 20. Qxd5 (20. Qe3 $15 Qxe3 21. Rxe3) 20... Qxf2+ 21. Re2 (21. Bc2 $17) 21... Qf6+ $19 22. Re5 Be6 23. Qe4 (23. Qd4 $142) 23... Rad8 {White must now prevent ...Bf5!} 24. Bc2 $2 (24. Kc2 {is a better defense.}) 24... Rxd1 25. Bxd1 Rc8 26. Qd4 a4 $1 27. Bf3 axb3 28. Re4 $2 (28. Bd5) 28... Bxc4 29. Qxf6 exf6 {[%mdl 4096] Endgame KRB-KRB} 30. Rd4 b5 31. Bd1 Re8 32. a4 Ra8 33. axb5 Bxb5 34. Bf3 Ra7 35. Kxb3 Rc7 36. Rd6 Kg7 37. Kb4 Bd7 38. Ka5 {[#] Threatens to win with Kb6.} Be6 39. Rd4 Rc4 (39... f5 $142 40. Rd2 Kf6) 40. Rd2 (40. Rxc4 {was the only chance.} Bxc4 41. Kb4) 40... f5 41. Kb5 Rc3 42. Kb4 Rc7 43. Kb5 Kf6 44. Bc6 Ra7 45. Kc5 Ra2 46. Rd3 (46. Rxa2 Bxa2 47. Kd4) 46... Rc2+ 47. Kd6 Bc4 48. Rd1 Rc3 49. Re1 Rd3+ 50. Kc5 Be6 51. Re2 h5 52. Bb5 Rd5+ 53. Kb4 h4 54. Bc6 Rd3 55. Bb5 Rd1 56. Bc6 Rc1 57. Ba8 Ra1 58. Bc6 h3 59. gxh3 Ra2 60. Rxa2 Bxa2 {KB-KB} 61. Kc3 (61. h4 $142 Ke5 62. Kc3) 61... Ke5 $2 (61... Kg5 {aiming for ...Be6.} 62. Kd2 Kh4) 62. Kd3 $2 (62. h4) 62... Bd5 63. Be8 g5 64. Ke3 f6 (64... f4+ $142 65. Kf2 Be6) 65. Kf2 Be6 66. h4 gxh4 67. Bb5 f4 68. Bd3 Bf5 69. Be2 Be4 70. Bg4 Bf5 $2 (70... Bb7 $19 71. Bd7 Kd4) 71. Bf3 $2 (71. Be2 $1 $11 {and White has nothing to worry.} Bg6 72. Bb5) 71... Bh3 72. Bc6 Bg4 73. Bb7 Bd1 74. Bc8 Bc2 75. Bg4 Bf5 $2 (75... Bd3 $19 {...Bc4 is the strong threat.} 76. Bd1 Be4) 76. Bd1 $2 (76. Be2 $11 {and White is okay.} Be6 77. Bb5) 76... Bh3 77. Ba4 Be6 78. Bc2 Bd5 79. Bd3 Kd4 80. Bf5 f3 (80... Bc6 $19 81. Bg4 Bd5) 81. Bc8 Ke4 82. Bd7 Kf4 83. Bc8 Be4 84. Bd7 f5 85. Bb5 Bd5 86. Ba6 Bf7 87. Bb5 Bh5 88. Bc4 Bg4 89. Bd5 Bh5 90. Bc4 Kg4 91. Kg1 Be8 92. Bd3 Bc6 93. Bc4 Kf4 94. Kf2 Ba4 95. Bd5 Bd1 96. Be6 Kg4 97. Kg1 Bc2 98. Bc4 Be4 99. Bb5 Kf4 100. Kf2 Kg4 101. Kg1 $1 Bc2 102. Bc4 $1 Bd1 ({Better is} 102... Kg5 $17 {And now ...Kf4 would win.} 103. Bf1 Be4) 103. Bb5 (103. Be6 $1 $11) 103... Be2 104. Bd7 Bd3 105. Bc6 Be4 106. Bb5 Kf4 {[#] ( -> ...Ke3)} 107. Kf2 {White happily takes the draw.  Weighted Error Value: White=0.38/Black=0.21} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.6"]
[White "Glazar, Domagoj"]
[Black "Nikitskaya, Varvara"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2142"]
[BlackElo "1173"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,47,48,56,43,49,10,25,0,0,-9,-12,-54,0,0,7,11,27,28,40,-6,473,473,482,471,518,522,527,520,892,746,911,835,822,822,1026,308]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 Qb6 {6...h6 is the modern continuation.} 7. Qc2 Ne4 8. Nxe4 {D35: Queen's Gambit Declined: Exchange Variation.} dxe4 9. Qxe4+ Be6 10. O-O-O {White has an edge.} Qa5 $1 {[%cal Ra5g5]} 11. Nf3 {Hoping for Bc4.} Qxa2 12. Bd3 {[#]} Qa1+ $146 (12... h6 $15 13. Bh4 Nd7) ({Predecessor:} 12... f5 13. Qe5 Nd7 14. Qc7 Bb4 15. Ne5 Nxe5 16. dxe5 O-O 17. Be7 Rfc8 18. Qxc8+ Rxc8 19. Bxb4 {0-1 (35) Lysiak,M (2349)-Shapiro,D (2530) Chess.com INT 2020}) 13. Kc2 $11 Qa4+ 14. Kd2 Qb4+ 15. Ke2 Nd7 16. Nd2 h6 $2 {[%mdl 8192] [#] A mistake that costs the game.} (16... Nb6 $11 {and Black is okay.}) 17. Qxe6+ $1 $18 {[%mdl 512] White is clearly winning.} Be7 18. Bxe7 Qxd2+ 19. Rxd2 {White threatens Bg6! and mate.} fxe6 20. Bh4 b5 (20... Kf7 $142 21. Bg3 Rhg8) 21. Rc1 Rc8 {[#]} 22. Bxb5 $1 O-O 23. Rxc6 Rb8 24. Rc4 $2 {Weighted Error Value: White=0.15/Black=0.86} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.7"]
[White "Aleksandrova, Aleksandra"]
[Black "Zavarsky, Juraj"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "1728"]
[BlackElo "1975"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,84,-2,-1,-80,-93,-104,-70,-75,-79,-92,-87,-111,-102,-133,-10,-68,-49,-302,-42,-150,-133,-141,-144,-124,-121,-89,46,58,65,48,25,-94,-8,-36,0,-631,-642,-644,-647,-877,-876,-830,-265,-270,-295,-512,-513,-500,-506,-741,-651,-1282,-1164,-29977,-29978,-29978,-29979,-29979,-29980,-29980,-29981,-29986,-29982,-29994,-29995,-29995,-29995,-29995,-29982,-29985,-29986,-29997,-29998,-29998,-29998,-29998,-29999]} 1. e4 c5 2. f4 e6 3. Nf3 a6 4. a4 Nc6 5. c3 d5 {[#]} 6. exd5 $146 {B21: Sicilian: 2 f4 and Morra Gambit.} (6. d3 $11) ({Predecessor:} 6. d3 dxe4 7. dxe4 Qxd1+ 8. Kxd1 Nf6 9. Nbd2 Be7 10. Bd3 O-O 11. Nc4 Rd8 12. Kc2 {1-0 (38) Probola,R (2155)-Derus,J (1895) Wojewodztwo Lubelskie 2013}) 6... exd5 $17 ({Much worse is} 6... Qxd5 7. d3 $11) 7. Bd3 c4 8. Bc2 {Black is slightly better.} Bc5 9. d4 cxd3 $1 10. Qxd3 Nge7 $1 11. Qe2 h6 (11... O-O $1 $17 12. b4 Bb6) 12. b4 (12. Be3 $11 Bxe3 13. Qxe3) 12... Bb6 13. Ba3 $2 {[%mdl 8192]} (13. a5 $15 Ba7 14. Be3) 13... Bg4 $2 (13... O-O $1 $19 14. Kd1 d4) 14. h3 (14. b5 $1 $15 Na5 15. Nbd2) 14... Bxf3 15. Qxf3 O-O $1 16. Nd2 d4 {Hoping for ...dxc3.} 17. c4 a5 (17... Re8 $1 $17 18. Kd1 d3 19. Qxd3 Qxd3 20. Bxd3 Rad8) 18. b5 $14 Nb4 19. Bxb4 axb4 20. Qd3 (20. Bd3 $11 {keeps the balance.}) 20... Ng6 ({Black should try} 20... g6 $17 21. g4 Re8) 21. O-O $11 Re8 $36 {[%mdl 2048] Black has the initiative.} 22. Rae1 {[%mdl 8192] Black continues to play with concentration.} (22. c5 $11 Bxc5 23. Nc4) 22... Re3 $19 23. Rxe3 dxe3 24. a5 Qxd3 25. Bxd3 {[#]} e2+ $2 (25... Nxf4 $1 {[%mdl 512]} 26. axb6 Nxd3) 26. axb6 exf1=Q+ ({Don't do} 26... exf1=N 27. Bxf1 Ra2 28. Ne4 $19) 27. Kxf1 $2 {[#]} (27. Bxf1 Ra2 28. Nb3) 27... Rd8 $1 {[%cal Rd8d3]} 28. Bxg6 {aiming for Be4.} Rxd2 {[%mdl 4096] Endgame KR-KB} ({Stronger than} 28... fxg6 29. Ke2 $15) 29. Be4 Rd4 30. Bxb7 {Threatens to win with Bd5.} b3 {White must now prevent ...b2.} 31. Bc8 b2 {Black mates.} 32. Bf5 Rxf4+ {[%mdl 64] Double Attack} 33. Ke2 Rxf5 {KR-KP} 34. b7 b1=Q 35. b8=Q+ Kh7 36. Qc7 Qe4+ {[%mdl 64] Double Attack} 37. Kd2 Qd4+ 38. Kc2 Rc5 39. Qxf7 Rxc4+ 40. Kb1 Qd3+ 41. Ka1 Rc1+ {[%mdl 64] Discovered Attack} 42. Ka2 Rc2+ {[%mdl 64] Double Attack.  Weighted Error Value: White=1.06/Black=0.40} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.8"]
[White "Vasquez, Georges"]
[Black "Petrov, Maksim"]
[Result "0-1"]
[ECO "C00"]
[WhiteElo "1864"]
[BlackElo "1568"]
[Annotator "NA RC"]
[PlyCount "144"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O c5 5. d3 Nc6 6. Nbd2 b6 7. e4 Bb7 8. e5 Nd7 9. Re1 Qc7 10. Qe2 h6 11. Nf1 g5 12. h3 Bg7 13. N1h2 Ndxe5 14. Nxe5 Qxe5 15. Qxe5 Nxe5 16. f4 gxf4 17. gxf4 Nd7 18. Ng4 O-O-O 19. c3 d4 20. Bxb7+ Kxb7 21. c4 h5 22. Nh2 Rde8 23. Nf3 Rhg8 24. Kf2 f5 25. Bd2 e5 26. fxe5 Bxe5 27. Rg1 Bf6 28. Rxg8 Rxg8 29. Re1 Rg7 30. Bf4 Re7 31. Rg1 Be5 32. Re1 Bf6 33. Rg1 Nf8 34. Bd6 Rf7 35. Rg8 Ne6 36. Rg6 Ng7 37. Bf4 Ne6 38. Be5 Bxe5 39. Rxe6 Bf6 40. Kg3 Kc7 41. Kf4 Kd7 42. Re2 Kd6 43. Ng5 Bxg5+ 44. Kxg5 f4 45. Kxh5 Rg7 46. Re4 Rg3 47. h4 f3 48. Rf4 Ke5 49. Rf8 Rg2 50. Rxf3 Rxb2 51. Kg4 Rxa2 52. Kg3 Re2 53. Kg4 a5 54. Rf8 Re3 55. Rb8 Rxd3 56. Rxb6 a4 57. h5 Rd2 58. Rc6 a3 59. Rxc5+ Ke4 60. h6 a2 61. Ra5 Rh2 62. c5 Rxh6 63. Rxa2 d3 64. Kg3 Ke3 65. Ra3 Ke2 66. Ra8 Re6 67. c6 d2 68. c7 d1=Q 69. c8=Q Qg1+ 70. Kf4 Qe3+ 71. Kf5 Qe5+ 72. Kg4 Rg6+ 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.9"]
[White "Wollner, Bohus"]
[Black "Nazarov, Nicolai"]
[Result "0-1"]
[ECO "D32"]
[WhiteElo "1107"]
[BlackElo "1770"]
[Annotator "NA RC"]
[PlyCount "58"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Nf3 c5 3. c4 e6 4. Nc3 dxc4 5. e3 cxd4 6. exd4 Bb4 7. Bxc4 h6 8. O-O Nf6 9. Re1 O-O 10. a3 Ba5 11. b4 Bb6 12. Bb2 a6 13. Ne4 Nxe4 14. Rxe4 Bd7 15. Qc2 Bc6 16. Ree1 Bxf3 17. gxf3 Bxd4 18. Bxd4 Qxd4 19. Rad1 Qf4 20. Qe4 Qxe4 21. fxe4 Nc6 22. f3 Ne5 23. Be2 Rfd8 24. Rxd8+ Rxd8 25. Kf2 Rd2 26. Kg1 Ra2 27. f4 Ng6 28. f5 exf5 29. exf5 Nh4 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.24"]
[Round "8.10"]
[White "Dubov, Pavel"]
[Black "Bortnik, Timur"]
[Result "0-1"]
[ECO "B07"]
[Annotator "NA RC"]
[PlyCount "140"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d6 2. Nf3 Nf6 3. Nc3 c6 4. d3 Qa5 5. Be2 e5 6. O-O Be7 7. Bd2 Qc7 8. Bg5 Be6 9. d4 Nbd7 10. Bxf6 Nxf6 11. d5 Bg4 12. h3 Bh5 13. dxc6 bxc6 14. Rb1 O-O 15. b4 Bg6 16. Bd3 Rab8 17. b5 Qa5 18. Qd2 cxb5 19. Nxb5 Qxa2 20. Ra1 Qe6 21. Rxa7 Nxe4 22. Bxe4 Bxe4 23. Nc7 Qg6 24. Qe2 Bxc2 25. Nd5 Bd8 26. Rc7 Bd3 27. Qd1 Rb1 28. Rc1 Rxc1 29. Qxc1 Bxf1 30. Qxf1 Qe6 31. Qd3 e4 32. Qb3 exf3 33. gxf3 Qxh3 34. Nf4 Qh6 35. Nd5 Re8 36. Ne3 g6 37. Qb8 Kf8 38. Qxd6+ Be7 39. Qe5 Qg5+ 40. Ng4 Qxe5 41. Nxe5 Bb4 42. Nd7+ Kg7 43. f4 Re4 44. Nb6 Rxf4 45. Nd5 Rg4+ 46. Kf1 h5 47. f3 Rd4 48. Ne3 Rd3 49. Nc2 Rxf3+ 50. Ke2 Rf4 51. Ke3 g5 52. Nd4 Rxd4 53. Kxd4 h4 54. Ke3 h3 55. Kf3 f5 56. Kg3 g4 57. Kh2 Bd6+ 58. Kh1 f4 59. Kg1 Kf6 60. Kh1 Kg5 61. Kg1 g3 62. Kh1 g2+ 63. Kg1 f3 64. Kf2 h2 65. Kxf3 g1=Q 66. Ke4 h1=Q+ 67. Kd3 Qg4 68. Ke3 Qhf3+ 69. Kd2 Qgg2+ 70. Ke1 Qff1# 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.1"]
[White "Kimsanboyev, Axadxon"]
[Black "Obodchuk, Andrei"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "1636"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,71,2,12,-25,37,36,43,32,42,38,46,26,61,54,68,52,80,4,6,8,6,12,7,9,8,16,15,3,3,3,4,4,4,4,5,3,4,3,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Bf4 g6 3. e3 Bg7 4. Nf3 d6 5. Be2 O-O 6. h3 b6 7. O-O Bb7 8. a4 a6 $1 {8...a6 is better than 8...a5.} 9. c4 {[#] A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems.} e6 $146 (9... a5 $11) ({Predecessor:} 9... Nbd7 10. Nc3 c5 11. d5 Qc7 12. Bh2 Rfe8 13. Qd2 Rad8 14. e4 Ne5 15. Nxe5 dxe5 16. a5 bxa5 {1-0 (50) Nguyen,N (3002)-Mezentsev,I (2720) Chess.com INT 2020}) 10. a5 $14 Ne4 11. Nbd2 {White is slightly better.} Nxd2 12. Qxd2 bxa5 13. Rxa5 Nc6 14. Ra3 a5 15. Rfa1 e5 16. Bh2 (16. Bg3 $16) 16... exd4 $1 $11 {The position is equal.} 17. exd4 Qf6 {[%cal Rc6d4]} 18. d5 Nd4 19. Qxd4 ({Not} 19. Rxa5 $2 Nb3 $19) 19... Qxd4 20. Nxd4 Bxd4 21. Rxa5 Bxb2 22. Rxa8 Rxa8 23. Rxa8+ Bxa8 {[%mdl 4096] Endgame KBB-KBB} 24. Bf4 Bd4 25. Kf1 Bb7 26. Bd3 f5 27. Ke2 Kf7 28. Be3 Bc5 29. Bxc5 dxc5 {KB-KB} 30. f4 c6 31. dxc6 Bxc6 32. g3 Kf6 33. h4 h6 34. Ke3 g5 35. hxg5+ hxg5 36. Be2 {Weighted Error Value: White=0.10/Black=0.09} 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.2"]
[White "Glazar, Domagoj"]
[Black "Gurbanov, Andrei"]
[Result "0-1"]
[ECO "C51"]
[WhiteElo "2142"]
[BlackElo "2252"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,58,-5,-15,277,22,259,-77,-10,-6,-23,-15,-20,-22,-24,-33,-34,-62,-61,-110,-33,-25,0,-132,-135,-135,-133,-217,-140,-144,-131,-166,-178,-222,-221,-279,-275,-265,-259,-273,-258,-319,-319,-311,-305,-1498,-1471,-29981,-29981,-2935,-1845]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 d6 {[%mdl 8192] C51: Evans Gambit: Declined and Accepted without 5...Ba5.} 7. Qb3 $2 ({White must play} 7. dxc5 $18 {Black must now prevent Ng5.} Nf6 8. cxd6) 7... Qd7 $2 8. O-O $2 ({White has to play} 8. dxc5 $18 Na5 9. Bb5 $1 {[%mdl 512]} Nxb3 10. Bxd7+ Bxd7 11. axb3) 8... Bb6 (8... exd4 $17 9. Bb2 d3 10. Bxd3 Nge7) 9. Bb5 {And now d5 would win.} a6 10. Ba4 {d5 is the strong threat.} Ba7 $1 {[#] Strongly threatening ...b5.} 11. Qd1 $146 {aiming for d5.} ({Of course not} 11. d5 {[#]} b5 $1 $17) ({Predecessor:} 11. Na3 Nge7 12. d5 b5 13. Nxb5 axb5 14. Bxb5 O-O 15. dxc6 Qg4 16. Qc2 f5 17. Re1 {0-1 (48) Li,C (2751)-Ding,L (2766) Huaian 2016}) 11... b5 12. Bb3 Nf6 13. Re1 h6 14. Ba3 Na5 (14... O-O $17 15. Bb2 a5) 15. dxe5 $15 Nxb3 16. Qxb3 (16. exf6 $11 Nxa1 17. fxg7) 16... Ng4 $17 {[%mdl 64] Double Attack} 17. Re2 Nxe5 18. Nbd2 (18. Nxe5 $17 dxe5 19. Nd2) 18... Nxf3+ 19. Nxf3 O-O 20. Rd1 Bb7 21. c4 Rfe8 22. c5 Rxe4 23. Rxe4 Bxe4 24. cxd6 cxd6 25. Rxd6 Qf5 26. Nd4 Qg5 {[%csl Ge4][%cal Rg5g2]} 27. f3 $2 {[#]} (27. Nf3 Qf4 28. Qd1) 27... Qd2 $1 $19 {[%cal Rd2e1]} 28. Qb4 (28. h3 Bxd4+) 28... Qe3+ 29. Kh1 {[#]} Bc5 $1 {[%mdl 576] Back Rank.  Weighted Error Value: White=1.17/Black=0.44} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.3"]
[White "Gedgafov, Chamal"]
[Black "Anfinogenov, Artem"]
[Result "1-0"]
[ECO "A60"]
[WhiteElo "2202"]
[BlackElo "2032"]
[Annotator "TA"]
[PlyCount "163"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,163,54,66,62,58,51,45,60,55,41,29,51,32,22,35,11,17,6,21,18,33,32,87,-27,-39,-31,-45,-36,-32,-67,-18,-17,-22,-15,-33,-26,0,-34,17,20,28,15,6,-6,-2,-120,-15,-210,48,36,35,30,46,8,1,7,16,0,26,0,93,85,85,-156,14,14,14,16,89,75,732,724,882,794,2743,2228,1411,0,0,0,0,0,8,8,8,8,8,8,8,8,8,10,29958,29952,29975,103,29967,29968,29975,29974,29976,29977,29977,29978,29979,0,29977,29974,29976,29977,29977,29963,29967,29959,29969,29970,29970,29972,29971,29972,29974,1177,815,705,29972,29973,29973,29972,29974,29972,29980,29980,29980,29981,29981,29982,29982,29983,29985,29986,29986,29986,29986,29982,29982,29983,29984,29985,29985,29986,29986,29987]} 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 Bd6 6. Nf3 O-O 7. Bg5 Re8 8. e3 {A60: Modern Benoni: Early Divergences.} Bc7 9. Bd3 d6 10. Qc2 {White is slightly better.} h6 11. Bh4 a6 12. a4 Nbd7 13. Nd2 Ne5 {[#]} 14. Be2 $146 ({Predecessor:} 14. O-O Qe7 15. Rae1 g5 16. Bg3 Nxd3 17. Qxd3 Nh5 18. e4 Bd7 19. f4 b5 20. axb5 axb5 21. Nxb5 {1-0 (42) Halkias,S (2571)-Limontas,M (2306) Warsaw 2006}) 14... Ng6 15. Bg3 Rb8 16. O-O Bd7 17. Nc4 Qe7 ({Better is} 17... Ne7 $14) 18. Bd3 ({White should play} 18. a5 $16) 18... b5 $11 19. axb5 axb5 20. Nd2 Ne5 21. Rfd1 b4 22. Bxe5 Qxe5 {[%mdl 64] Double Attack} 23. Nc4 Qe7 24. Ne2 Kh8 25. Bf5 Bxf5 (25... Bb5 $15) 26. Qxf5 g6 27. Qd3 Ra8 28. f3 Nd7 29. f4 (29. Rxa8 $11 Rxa8 30. Nf4) 29... f5 (29... Rxa1 $1 $17 30. Rxa1 Nb6 31. Nxb6 Bxb6) 30. g4 $2 (30. Rxa8 $11 {and White is okay.} Rxa8 31. Ng3) 30... fxg4 $2 (30... Rxa1 $19 31. Rxa1 Nb6) 31. Rxa8 $14 Rxa8 32. Qxg6 {[%mdl 64] Double Attack} Qf6 33. Qxf6+ ({Avoid the trap} 33. Qxg4 $2 Rg8 $19) (33. Qh5 {is more complex.} Nb6 34. Nd2 Kg7 35. Qxg4+ Qg6 36. Qxg6+ Kxg6 37. e4) 33... Nxf6 34. Ng3 h5 35. Kg2 Kh7 36. h3 Kg6 (36... Re8 $11) 37. hxg4 $16 hxg4 38. Rd2 $2 {[#]} (38. e4 $16 {and life is bright.}) 38... Ra1 $2 (38... b3 $1 $17 {aiming for ...Ra4.} 39. Re2 Ra4) 39. e4 $11 {And now e5 would win.} Rc1 40. b3 Rc3 (40... Nd7 $11 {keeps the balance.}) 41. e5 $16 Rxg3+ $2 {[%mdl 8192]} 42. Kxg3 $18 Ne4+ 43. Kxg4 Nxd2 44. Nxd2 dxe5 {[#]} 45. fxe5 $2 ({White has to play} 45. f5+ $1 $18 Kf6 46. Ne4+ Kf7 47. Nxc5) 45... Bxe5 {[%mdl 4096] Endgame KB-KN} 46. Nc4 Kf6 47. Kf3 {Black must now prevent Ke4.} Bh2 48. Ke4 Bg3 49. Na5 {Strongly threatening Kd3.} Bf2 50. Kd3 {Hoping for Kc4.} Ke7 51. Kc4 {Nb7 is the strong threat.} Kd7 52. Nb7 Kc7 $2 {[%mdl 8192] White now steadily converts the win.} (52... Bg1 $11 53. Nxc5+ Kd6) 53. Nxc5 Bg1 54. Na6+ $2 (54. Ne4 {mates} Be3 55. Kxb4 Kd7 56. Kc4 Bf4 57. d6 Ke6 58. Kc5 Bh2 59. Kc6) 54... Kb6 $2 {[%mdl 8192]} (54... Kd6 $16 55. Nxb4 Bh2) 55. Nxb4 Bf2 56. Nd3 Bg1 57. b4 Be3 58. Ne5 Bd2 59. Nd3 Be3 60. Nb2 Bg1 61. Na4+ Kc7 62. Kd3 Kd7 63. Ke4 Kd6 64. Nb2 Bf2 65. Nc4+ Kd7 66. Kd3 Kc7 67. Ne5 (67. Kc3 $142 Bh4 68. Kb3 Kb7 69. Ka4 Ka6 70. d6 Bf6 71. Na5 Kb6 72. b5) 67... Kd6 68. Ke4 Bg3 69. Nc4+ {White mates.} Kd7 70. Kd3 Bf2 71. Kc3 Bg1 72. Kb3 Kc7 73. Ka4 Bf2 74. Kb5 Kb7 75. d6 Be1 76. Na5+ Kb8 77. Kc5 Bd2 78. Kd5 Be1 79. Ke6 Ka7 80. d7 Bh4 81. Nc6+ Kb6 82. Ne7 {Weighted Error Value: White=0.51/Black=0.53} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.4"]
[White "Tsapalin, Sergey"]
[Black "Valenta, Vit Vaclav"]
[Result "0-1"]
[ECO "E73"]
[WhiteElo "1981"]
[BlackElo "2028"]
[Annotator "TA"]
[PlyCount "136"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,136,83,62,67,68,78,60,76,79,72,64,85,82,84,81,122,122,134,136,125,124,126,115,139,128,166,173,187,-9,-19,-19,-32,-39,-35,-35,0,0,0,0,11,0,0,0,0,0,6,0,0,-10,0,0,0,0,0,0,0,-7,-7,-7,0,0,-2,-4,-2,-83,-81,-87,-80,-59,0,-122,-133,-119,-107,-109,-113,-117,-110,-122,-121,-116,-108,-104,-109,-104,-106,-115,-105,-110,-106,-106,-119,-127,-119,-96,-111,-94,0,-26,-8,-27,-18,-66,-8,-8,-8,-8,0,0,0,-1272,-1216,-1083,-8,-5841,-5833,-3112,-871,-29978,-29979,-29973,-29974]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 h6 7. Be3 Nbd7 8. Qd2 Kh7 {8...Kh7 is better than 8...c5.} 9. f3 {has lost popularity (9.h4).} e5 {E73: King's Indian: Averbakh Variation without 6...c5.} 10. d5 Nh5 11. Nh3 Nc5 {White is slightly better.} 12. Nf2 a5 {[#]} 13. Nd3 $146 ({Predecessor:} 13. g3 b6 14. O-O-O a4 15. Rde1 a3 16. b3 Bd7 17. Rhf1 Qe7 18. Bd1 Nf6 19. Bc2 {1-0 (47) Ivanchuk,V (2705)-Megaranto,S (2439) Mallorca 2004}) 13... Nxd3+ 14. Bxd3 Nf4 15. Bf1 f5 16. g3 Nh5 17. exf5 gxf5 18. Bd3 e4 19. fxe4 f4 20. e5+ $1 Kh8 21. gxf4 {Threatens to win with e6.} Qh4+ 22. Qf2 $2 (22. Kd1 $1 $18) 22... Qxf2+ $11 {[%mdl 64] Overworked Piece} 23. Bxf2 Nxf4 24. Be4 {Black should prevent e6.} Bxe5 {And now ...Nh3 would win.} 25. Kd2 $1 Bd7 26. Bg3 Rae8 27. Rae1 Nh3 (27... Bf6 {is more complex.} 28. Bxf4 Bxc3+ 29. Kxc3 Rxf4 30. Bd3 Rxe1 31. Rxe1 Kg7) 28. Bxe5+ Rxe5 29. Rhf1 Rxf1 30. Rxf1 Kg7 31. Bg2 (31. Bd3 {with more complications.} Rh5 32. Ne4 Rf5 33. Rxf5 Bxf5 34. Nc5) 31... Ng5 32. Re1 (32. h4 {looks sharper.} Nf7 33. Bf3 Re7 34. Bh5 Ne5 35. b3) 32... Rxe1 33. Kxe1 {[%mdl 4096] Endgame KBN-KBN} Kf6 34. Kd2 Ke5 35. Ke3 Nh7 36. b3 Nf6 37. Bf3 Ne8 38. a3 Ng7 39. Be4 Nh5 40. b4 (40. Ne2 $11) 40... axb4 $1 $17 41. axb4 Nf6 42. Bf3 b6 (42... b5 $1 $15 43. cxb5 Bg4) 43. Ne2 (43. b5 $1 $11) 43... b5 44. Kd3 Bf5+ 45. Kc3 Be4 46. Bxe4 Nxe4+ {KN-KN} 47. Kd3 Nf2+ $1 48. Kc3 bxc4 49. Kxc4 Ng4 50. Kb5 Kxd5 51. Nc3+ Kd4 52. Ne2+ Kd3 53. Nf4+ Ke4 54. Ne6 Nxh2 55. Nxc7 Nf3 $1 56. Ne8 {[#]} Kd5 (56... Ke5 $1 $17 57. Ng7 d5) 57. Nf6+ Ke6 58. Ne4 h5 {White must now prevent ...d5.} 59. Nf2 Kd5 (59... Kd7 $15 60. Kc4 Ne5+ 61. Kd5 Ng4) 60. Ka6 $1 $11 Nd4 61. b5 Nb3 {...Kc4 is the strong threat.} 62. b6 {aiming for Nd3.} Nc5+ 63. Ka7 $2 {[%mdl 8192] [#]} (63. Kb5 $11) 63... Kd4 $1 $19 {[%cal Rd4e3]} ({Worse is} 63... Kc6 64. Nd3 $14) 64. Nh3 h4 $2 ({Black should try} 64... d5 $19 65. Kb8 Ke3) 65. Nf4 $2 {[%mdl 8192]} (65. Kb8 $11) 65... Ke4 66. Nh3 d5 67. Ka8 d4 68. Ng5+ Kd5 {Quite a comeback for Black.  Weighted Error Value: White=0.16/Black=0.10} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.5"]
[White "Moya Albaladejo, Jose Antonio"]
[Black "Zavarsky, Juraj"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1923"]
[BlackElo "1975"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,60,57,73,57,50,39,51,24,45,18,47,8,15,-6,37,25,35,31,94,89,77,75,82,75,93,42,45,-7,-7,-2,10,8,22,0,58,0,62,12,14,28,12,7,11,5,23,12,46,-104,-103,-128,-122,-746,-732]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 Na5 4. O-O a6 5. Be2 e6 6. d4 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} cxd4 7. Nxd4 Qc7 8. Nc3 {White is slightly better.} Nf6 9. f4 {[#] With the idea e5.} b5 $146 ({Predecessor:} 9... d6 10. Bf3 Be7 11. Kh1 O-O 12. Qe1 Rb8 13. e5 Ne8 14. exd6 Nxd6 15. f5 Qc5 16. fxe6 Qxd4 17. exf7+ Rxf7 {1-0 (61) Fedorchuk,S (2650)-Razmyslov,A (2439) Jaen 2011}) 10. a3 Bb7 11. Bf3 Nc6 {[#] Strongly threatening ...Nxd4.} 12. Nxc6 Bxc6 13. e5 Bc5+ (13... Ng8 $14) 14. Kh1 $16 Ng8 15. Ne4 Bxe4 16. Bxe4 Rd8 17. Qf3 (17. Qg4 $16 g6 18. Qe2) 17... Ne7 $14 18. Be3 ({White should play} 18. Qc3 $14) 18... Bxe3 $11 19. Qxe3 d5 20. Bd3 O-O 21. c3 f6 (21... g6 $11) 22. a4 ({White should try} 22. exf6 $14 Rxf6 23. a4) 22... bxa4 (22... fxe5 $11 23. fxe5 Ng6) 23. Qh3 ({Don't play} 23. Bxa6 fxe5 24. fxe5 Rxf1+ 25. Bxf1 Nf5 $11) 23... f5 $1 24. Rxa4 a5 25. Rfa1 $36 {[%mdl 2048] White has good play.} Rb8 26. b4 axb4 27. cxb4 Rfc8 28. Qe3 (28. Bf1 $14 {stays ahead.}) 28... Qc3 $17 29. b5 {[#]} Rxb5 $1 {[%mdl 576] Threatens to win with ...Rb3. Pin} 30. Qa7 $2 {[%mdl 8192]} (30. h3 Rb3) 30... Qxd3 {Weighted Error Value: White=0.62/Black=0.16} 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.6"]
[White "Nikitskaya, Varvara"]
[Black "Aleksandrova, Aleksandra"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "1173"]
[BlackElo "1728"]
[Annotator "NA RC"]
[PlyCount "111"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d6 2. e4 c6 3. Nc3 Qa5 4. f4 Nf6 5. e5 dxe5 6. fxe5 Ne4 7. Bd2 Nxd2 8. Qxd2 Bg4 9. Qg5 h5 10. h3 Be6 11. Nf3 Qb4 12. O-O-O g6 13. Kb1 Nd7 14. Bd3 Nb6 15. Rhe1 O-O-O 16. a3 Qa5 17. Ne4 Nd5 18. Nc5 Bh6 19. Qh4 Ne3 20. Qxe7 Qc7 21. Qxc7+ Kxc7 22. Nxe6+ fxe6 23. Rd2 Nd5 24. Rf2 g5 25. c3 Rdf8 26. c4 Nf4 27. Bf1 Ng6 28. Rc2 Rd8 29. Re4 Rhf8 30. Be2 Nf4 31. Bd1 c5 32. b4 g4 33. hxg4 hxg4 34. Ne1 cxd4 35. Bxg4 d3 36. Rd2 Rg8 37. Bf3 Ne2 38. Rxd3 Rxd3 39. Nxd3 Nc3+ 40. Kc2 Nxe4 41. Bxe4 Rg4 42. Nc5 b6 43. Nxe6+ Kd7 44. Bd5 Rg3 45. a4 Re3 46. a5 b5 47. cxb5 Rxe5 48. Nc5+ Kd6 49. Bf3 Be3 50. Ne4+ Kc7 51. Kd3 Bg1 52. Kc4 Bh2 53. b6+ axb6 54. a6 b5+ 55. Kd4 Re6 56. Kc5 1/2-1/2

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.7"]
[White "Petrov, Maksim"]
[Black "Bortnik, Timur"]
[Result "1-0"]
[ECO "E81"]
[WhiteElo "1568"]
[Annotator "NA RC"]
[PlyCount "75"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 g6 2. c4 Nf6 3. f3 Bg7 4. e4 d6 5. Nc3 O-O 6. Bg5 Na6 7. Qd2 h6 8. Bxh6 e5 9. Bxg7 Kxg7 10. dxe5 dxe5 11. Qxd8 Rxd8 12. Rd1 Be6 13. g4 Rd4 14. b3 Rad8 15. Nge2 Rd3 16. Bg2 Nb4 17. Rxd3 Nxd3+ 18. Kf1 Nb4 19. Kf2 Rd2 20. Kg3 Rd3 21. Kf2 Rd2 22. a3 Nc2 23. Rb1 Nd4 24. Ke3 Rc2 25. Kd3 Bd7 26. Bh1 Rxc3+ 27. Nxc3 Nh7 28. h4 f5 29. exf5 gxf5 30. Re1 Nxb3 31. Rxe5 Kf6 32. Rd5 Nf8 33. gxf5 Bxf5+ 34. Ne4+ Ke6 35. Rb5 Nd7 36. Rxb3 Nc5+ 37. Kc3 Nxb3 38. Kxb3 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.8"]
[White "Zakharova, Evgeniya"]
[Black "Nazarov, Nicolai"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "2045"]
[BlackElo "1770"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,51,0,61,56,61,40,60,24,48,57,62,28,54,47,50,43,58,39,30,28,39,32,55,52,55,54,171,166,167,169,170,166,172,165,172,162,194,177,190,190,189,191,191,183]} 1. d4 d5 2. c4 e6 3. g3 c6 4. Nf3 Bb4+ 5. Bd2 Qa5 {[#]} ({Black should try} 5... Be7 $11) 6. a3 $146 {D30: Queen's Gambit Declined: Systems without Nc3.} ({Predecessor:} 6. Bg2 dxc4 7. Ne5 Ne7 8. Nxc4 Bxd2+ 9. Nbxd2 Qd8 10. e3 O-O 11. O-O Nd7 12. Qc2 {1-0 (40) Fischoeder,H (1924)-Rother,J (1877) Nordrheinwestfalen 2012}) 6... Bxd2+ 7. Qxd2 (7. Nbxd2 {is interesting.} dxc4 8. Bg2 b5 9. a4 Qc7 10. Qc1) 7... Qxd2+ 8. Nfxd2 {White is slightly better.} (8. Nbxd2 {seems wilder.} Ne7 9. e3 b6 10. Be2 O-O 11. b4) 8... Nf6 9. Nc3 O-O 10. Bg2 Nbd7 11. O-O Nb6 12. b3 Re8 13. c5 Nbd7 14. f4 b6 15. b4 Bb7 16. Bf3 a5 17. Rfb1 b5 (17... Reb8 $14) 18. bxa5 $18 {White is clearly better.} Rxa5 {[#]} 19. a4 $1 Rea8 20. Nb3 R5a6 21. axb5 cxb5 22. Nxb5 Rxa1 23. Rxa1 Nb8 24. Rxa8 Bxa8 25. Na5 Kf8 26. Na7 {Weighted Error Value: White=0.04/Black=0.20} 1-0

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.9"]
[White "Wollner, Bohus"]
[Black "Vasquez, Georges"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1107"]
[BlackElo "1864"]
[Annotator "NA RC"]
[PlyCount "68"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5 h6 6. Bc1 O-O 7. e4 Nbd7 8. Be2 e5 9. O-O a5 10. b3 Re8 11. Bb2 exd4 12. Nxd4 Nxe4 13. Nxe4 Rxe4 14. Bf3 Re8 15. Bg4 Ne5 16. Bxc8 Rxc8 17. Rb1 Qd7 18. a4 b6 19. Ba1 Nc6 20. Nxc6 Qxc6 21. Bxg7 Kxg7 22. Qd4+ f6 23. Rbc1 Qc5 24. Qxc5 bxc5 25. Rfd1 Re2 26. Kf1 Rce8 27. h3 Kf7 28. g3 Rb2 29. Rb1 Rxb1 30. Rxb1 f5 31. Re1 Rxe1+ 32. Kxe1 c6 33. Ke2 d5 34. Kd3 Kf6 0-1

[Event "20th IPCA World-ch 2021"]
[Site "Torrevieja"]
[Date "2021.10.26"]
[Round "9.10"]
[White "Dubov, Pavel"]
[Black "Pilimon, Zbigniew"]
[Result "1/2-1/2"]
[ECO "B50"]
[BlackElo "1638"]
[Annotator "NA RC"]
[PlyCount "29"]
[EventDate "2021.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. Nf3 d6 3. Bc4 e6 4. d3 Nf6 5. Nc3 Be7 6. O-O O-O 7. Re1 Nc6 8. e5 Nxe5 9. Nxe5 dxe5 10. Rxe5 a6 11. a4 Qc7 12. Re3 b6 13. Qf3 Bb7 14. Qg3 Bd6 15. Qh3 1/2-1/2

