[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.1"]
[White "Bartel, Mateusz"]
[Black "Teclaf, Pawel"]
[Result "1/2-1/2"]
[ECO "A10"]
[WhiteElo "2648"]
[BlackElo "2451"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,60,31,29,23,79,76,69,78,75,64,132,116,148,118,138,125,139,54,97,63,77,47,48,16,14,0,53,0,0,0,0,0,0,0,0,-5,-3,-3,-10,-18,-14,-26,0,-28,0,0,0,0,0,0,0,0,0]} 1. c4 b6 2. Nc3 Bb7 3. d4 e6 4. e4 Bb4 5. f3 Ne7 6. Nge2 {[#] A40: Unusual replies to 1 d4.} Nbc6 $146 (6... f5 $11) ({Predecessor:} 6... d5 7. a3 Bxc3+ 8. Nxc3 O-O 9. Bg5 dxe4 10. fxe4 f6 11. Bh4 Nbc6 12. d5 Ne5 13. Qd2 Ba6 {½-½ (62) Gelfand,B (2673)-Lomasov,S (2553) Moscow 2018}) 7. d5 $16 Ne5 8. a3 {White is slightly better.} Bxc3+ 9. Nxc3 O-O {[#]} (9... d6 $14) 10. f4 $1 {[%cal Rf4e5]} N5g6 {[#]} 11. h4 $1 f5 {White should prevent ...fxe4.} 12. h5 Nh8 13. g4 (13. h6 $16 {Hoping for hxg7.} gxh6 14. Rxh6) 13... fxe4 $14 14. Bg2 exd5 15. cxd5 Nf7 16. Be3 c6 17. dxc6 dxc6 (17... Bxc6 $11 18. Bh3 (18. Bxe4 d5 $17) 18... Qc7) 18. Bxe4 ({But not} 18. Nxe4 Qxd1+ 19. Rxd1 Nd5 $11) (18. Qb3 $1 $14) 18... Nd5 $11 19. Bxd5 cxd5 20. Qd4 Rc8 {Strongly threatening ...Rc4.} 21. O-O-O $1 Rc4 22. Qxc4 dxc4 23. Rxd8 Rxd8 24. Rg1 Rd3 25. Bd2 Bf3 26. Nb5 a6 27. Nc7 {The position is equal.} Nd6 {Threatens to win with ...Ne4.} 28. Nxa6 Ne4 29. Bb4 Nf6 30. Nc7 Rd7 {Accuracy: White = 69%, Black = 69%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.2"]
[White "Heberla, Bartlomiej"]
[Black "Nasuta, Grzegorz"]
[Result "1-0"]
[ECO "D47"]
[WhiteElo "2572"]
[BlackElo "2558"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,103,-18,-12,-18,-12,-14,-24,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,32,39,29,-55,-16,-9,31,32,112,131,114,127,231,222,229,213,550,544,518,509,527,512,979,964,12828,12829,11237,6676,12827,12830,12830,12831,12832,12829,11590,10732,5850,5185,12841,12841,12844,12845,12845,12845,12850,27993,27994,27992,27995,27990,27991,27991,27992,27992]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Be2 Bb7 9. e4 b4 10. e5 bxc3 11. exf6 Nxf6 {D47: Semi-Slav: Meran System.} 12. bxc3 Bd6 13. Rb1 {[#]} Qc8 $146 {Black has an edge.} ({Predecessor:} 13... Qc7 14. Qb3 Rb8 15. Ba3 O-O 16. Bxd6 Qxd6 17. O-O Nd5 18. Qc2 Nf4 19. Ng5 Nxe2+ 20. Qxe2 {1-0 (66) Murshed,N (2401)-Goganov,A (2561) Dhaka 2017}) 14. Bg5 Ne4 15. Qc2 c5 {Strongly threatening ...cxd4.} 16. Bb5+ Kf8 {aiming for ...cxd4.} 17. Be3 cxd4 18. Bxd4 Bc5 19. Be2 Bxd4 20. Nxd4 Nc5 21. f3 g6 22. Qc1 Kg7 23. Qe3 Rd8 24. h4 h5 25. g4 e5 26. Qxe5+ {[%mdl 64] Double Attack} Kg8 {White must now prevent ...Re8.} 27. Kf1 (27. O-O $11) 27... hxg4 $1 $15 28. h5 $132 {[%mdl 2048] Intending hxg6 and mate. White is not keeping still} Rd5 29. Qe3 {Threatens to win with hxg6.} Qe8 {White leaves nothing to chance now.} (29... g5 $1 $14) 30. Qxe8+ $16 Rxe8 31. hxg6 Rg5 (31... Rde5 $16) 32. gxf7+ $18 {[%mdl 64] Overworked Piece} Kxf7 33. Rh7+ Rg7 $2 (33... Kg6 {is tougher.} 34. Rhxb7 (34. Rbxb7 Nxb7 35. Rxb7 gxf3 $18) 34... Nxb7) 34. Bc4+ Kf6 {[#]} 35. Rxg7 $1 Kxg7 36. Rb5 Rc8 {[#]} (36... Bxf3 $142 37. Rxc5 Be4 38. Rg5+ Kf6) 37. Rxc5 $1 {[%mdl 576] Remove Defender, Decoy} Rxc5 {[%mdl 4096] Endgame KRB-KBN} 38. Ne6+ {[%mdl 64] Double Attack} Kf6 39. Nxc5 Bxf3 40. Be2 Bd5 41. c4 {[%cal Bc3c4,Bc4c5][%mdl 32]} Bf7 42. Kf2 Ke5 43. Kg3 Kd4 44. Nb3+ Kc3 45. c5 Bd5 46. Bxg4 Kb4 47. Bd7 Bxb3 48. axb3 Kxc5 {White mates.} 49. Kf4 Kd4 50. Ba4 a5 51. Kf5 Kd5 52. Kf6 {Accuracy: White = 94%, Black = 65%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Tomczak, Jacek"]
[Black "Gumularz, Szymon"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2563"]
[BlackElo "2277"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,75,19,31,14,45,35,48,54,41,34,37,39,62,34,32,24,36,29,35,27,34,27,29,25,19,21,16,-47,-51,-51,-54,-51,-51,-65,0,0,0,0,0,-79,-17,-21,-10,-10,-10,-27,0,0,0,-9,-10,-13,-13,-13,-10,-9,-17,-14,0,0,0,0,1542,1412,12839,12837,12848,12848]} 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Bg5 a6 5. f4 b5 6. Nf3 {B06: Modern Defence.} Nf6 7. Bd3 Bb7 8. e5 {White is slightly better.} Nd5 9. Nxd5 Bxd5 10. Qe2 {[#]} Nd7 $146 ({Predecessor:} 10... Nc6 11. c3 O-O 12. Bh4 Qd7 13. O-O Qg4 14. Bg3 Bh6 15. Qe3 f6 16. Be2 Qe6 {0-1 (70) Predke,A (2533)-Dubov,D (2659) Sochi 2015}) 11. O-O dxe5 $1 12. dxe5 O-O 13. c4 Bxf3 14. Rxf3 Nc5 $1 {[%cal Bd7c5,Bc5e6,Be6d4][%mdl 32]} 15. Bh4 Ne6 {next ...Nd4 is good for Black.} 16. Qe4 Qd4+ 17. Qxd4 Nxd4 18. Re3 (18. Rh3 $11) 18... bxc4 $15 19. Be4 Rab8 20. Bxe7 Rfe8 $1 {[%cal Re8e7]} 21. Ba3 Bf8 ({Black should play} 21... Bh6 $1 $15 22. g3 Rxe5 {[%mdl 64] Pin}) 22. Bxf8 Kxf8 23. Rb1 f6 24. Rc1 ({Much weaker is} 24. exf6 c3 $1 $17 {[%mdl 512]}) (24. Bf3 $11 {remains equal.}) 24... Rxb2 (24... fxe5 $17 25. Bf3 exf4 26. Rxe8+ Kxe8 27. Rxc4 Nxf3+ 28. gxf3 Rxb2 29. Rxc7 Rxa2 30. Rxh7 Kf8) 25. Rxc4 $11 Ne2+ 26. Kf1 $1 Nxf4 27. exf6 Nxg2 28. Rh3 Rd8 {[%cal Rd8d1]} 29. Rc1 Rdd2 30. Rxh7 Nf4 31. Re1 Rxh2 32. Rxh2 Rxh2 {[%mdl 4096] Endgame KRB-KRN} 33. Rc1 Ne2 34. Rxc7 Nf4 35. Bc2 {Threatens to win with Bb3.} Nh3 $2 {[%mdl 8192] [#]} (35... Ne6 $11 36. Rc8+ Kf7) 36. Rc6 $1 $18 {White is clearly winning.} Rf2+ 37. Ke1 Rf4 38. Bxg6 {Accuracy: White = 88%, Black = 71%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Pakleza, Zbigniew"]
[Black "Piorun, Kacper"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "2555"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,90,5,7,13,0,14,-14,24,0,10,0,0,-71,-47,-68,-21,-33,-8,0,0,0,22,0,14,0,37,34,40,0,122,114,122,129,114,104,104,104,104,104,106,105,110,106,111,93,95,94,114,109,117,79,85,96,122,112,100,98,170,125,126,55,354,366,478,478,478,478,496,481,660,534,623,609,654,660,2346]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. a3 Bxc3+ 7. bxc3 c6 8. Bd3 b6 9. O-O Ba6 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} 10. Qe2 Nbd7 11. Bb2 Qc7 {[#] The position is equal.} 12. Rfd1 $146 ({Predecessor:} 12. Rfc1 Rac8 13. a4 Rfe8 14. h3 e5 15. dxe5 Nxe5 16. Nxe5 Qxe5 17. Rd1 Rcd8 18. cxd5 Bxd3 19. Rxd3 cxd5 {1-0 (44) Logothetis,S (2225)-Kapagiannidis,K Ikaros 2000}) 12... Rac8 13. Nd2 e5 14. Rac1 (14. cxd5 $11 {keeps the balance.} Bxd3 15. Qxd3) 14... e4 $17 15. Bb1 Rfe8 16. Ba2 Nf8 17. h3 Ng6 18. Qe1 b5 19. cxd5 cxd5 20. a4 Qd6 21. axb5 Bxb5 22. Bb3 Qd7 (22... Qe6 $11) 23. c4 $16 Ba4 {[#]} 24. Bxa4 $1 Qxa4 25. Ra1 Qd7 26. Rdc1 dxc4 27. Nxc4 Qe6 28. Qe2 Rc7 29. Ba3 Rd8 30. Na5 Rxc1+ 31. Rxc1 Rd5 32. Rc6 Qd7 33. Qc4 {Hoping for Rc8+.} h6 ({But not} 33... Rxa5 $2 34. Rc8+ Ne8 {[#]} 35. Qc7 $1 $18 {[%mdl 512]}) 34. Rc7 Qe6 35. Nc6 a5 36. Be7 {aiming for Nd8.} Ne8 (36... Rg5 $16 37. Qxe6 fxe6) 37. Ra7 {Black must now prevent Ra8.} Kh7 38. Nd8 (38. Rb7 $16) 38... Qb6 $2 {[%mdl 8192] A mistake that costs the game.} (38... Qf5 $14) 39. Rb7 $18 ({Less strong is} 39. Qxd5 Qb1+ 40. Kh2 Qb8+ 41. g3 Qxa7 $16) 39... Qxb7 40. Nxb7 {White is clearly winning.} Nxe7 41. Nc5 f5 42. Qa6 Rd6 43. Qxa5 Nd5 44. Qa7 Nef6 45. Qf7 Kh8 {Accuracy: White = 82%, Black = 53%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Janik, Igor"]
[Black "Gajewski, Grzegorz"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2531"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,59,17,25,0,0,0,0,0,0,0,0,0,0,7,20,20,73,55,131,127,108,112,104,112,132,97,99,99,87,79,99,101,230,181,210,170,235,235,269,246,231,233,1321,1143,12836,12837]} 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. d4 dxc4 7. Qc2 a6 8. a4 $1 {8.a4 is better than 8.Qxc4.} Bd7 9. Rd1 {E05: Open Catalan: 5 Nf3 Be7.} Bc6 10. Bg5 b5 11. Bxf6 {The position is equal.} Bxf6 12. Nc3 Qe8 13. d5 exd5 14. Nd4 $1 {[#]} Bxd4 $146 ({Predecessor:} 14... Qe5 15. e4 dxe4 16. Nxe4 Bxe4 17. Bxe4 Ra7 18. axb5 Qc5 19. Nc6 Nxc6 20. Bxc6 axb5 21. Rxa7 Qxa7 22. Bxb5 {½-½ (34) Dubov,D (2699)-Wei,Y (2732) chess24.com INT 2020}) 15. Rxd4 Nd7 (15... h6 $11) 16. Nxd5 $16 Qe5 {[#]} (16... Rb8 $1 $14) 17. Ne7+ $1 {[%mdl 576] Discovered Attack} Qxe7 18. Bxc6 Rad8 {next ...Qc5 is good for Black.} 19. axb5 $40 {[%mdl 128] Black is in trouble.} Ne5 20. Rxd8 Rxd8 21. Rxa6 g6 22. Kg2 Qc5 23. Qc3 Rb8 {[#] A mistake that costs the game.} (23... h5 $16 {was called for.}) 24. b4 $1 $18 {[%cal Rb4c5]} Qe7 25. Be4 Re8 (25... Rd8 $142 26. h3 h6) 26. Bd5 h5 27. f4 c6 28. bxc6 ({Don't take} 28. Qxe5 $6 cxd5 29. Qxe7 Rxe7 $16) 28... Nxc6 $2 (28... Nd3 29. Bxf7+ (29. exd3 Qe2+ {[%mdl 64] Double Attack} 30. Kg1 Qd1+ 31. Kg2 Qe2+ 32. Kg1 Qd1+ 33. Kg2 Qe2+ $11) 29... Kh7) 29. e4 Qxb4 {[#]} 30. Qf6 $1 {[%mdl 576] Double Attack. Accuracy: White = 90%, Black = 49%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Krasenkow, Michal"]
[Black "Krzyzanowski, Marcin"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2521"]
[BlackElo "2401"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,116,24,39,37,49,15,21,10,29,6,49,6,10,0,46,61,50,26,20,24,37,22,81,103,120,86,162,105,111,110,146,93,147,108,145,143,152,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,2,2,2,1,6,6,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,10]} 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 e6 5. Bd3 dxc4 6. Bxc4 Nbd7 7. O-O Bd6 {The main line 7...Bd6 scores better than 7...b5.} 8. b3 {D30: Queen's Gambit Declined: Systems without Nc3.} b5 9. Be2 Bb7 10. Bb2 {[#]} Qb8 $146 ({Predecessor:} 10... Qc7 11. Nbd2 Rc8 12. Rc1 Qb8 13. e4 e5 14. dxe5 Nxe5 15. Nd4 Ng6 16. Nf5 Bxh2+ {1-0 (36) Henriksson,J (2279)-Ask,J (2194) Norrkoeping 2012}) 11. Nbd2 O-O 12. Qc2 (12. e4 $5 {[%cal Re4e5]} e5 13. g3 $14) 12... Rc8 13. Ne4 c5 14. Nxd6 Qxd6 15. d5 exd5 16. Bxb5 d4 17. Qf5 {[%cal Re3d4]} Bxf3 (17... Rcb8 $11 {remains equal.} 18. Bxd7 (18. exd4 $2 Be4 $17) 18... Qxd7) 18. Qxf3 $16 Ne5 19. Qf4 {[%cal Re3d4]} Rab8 (19... Nd5 $16 20. Qg3 a6) 20. Be2 (20. exd4 $18 cxd4 21. a4) 20... Nd5 21. Qg3 Qf6 22. exd4 (22. Rfc1 $142) 22... Ng6 (22... Nc6 $142) 23. Rad1 Ndf4 24. Bc4 cxd4 25. Bxd4 $2 (25. Rfe1 $16) 25... Rxc4 $1 $11 {The position is equal.} 26. Bxf6 Ne2+ {[%mdl 64] [#] Double Attack} 27. Kh1 Nxg3+ 28. hxg3 Rc2 29. Bd4 Rxa2 30. Ra1 Rxa1 31. Rxa1 Rxb3 32. Rxa7 {[%mdl 4096] [#] Endgame aiming for Ra8+. KRB-KRN} h6 33. Ra8+ Kh7 34. Ra7 Rd3 35. Ba1 Rd8 36. Kh2 Kg8 37. g4 Nf4 38. Be5 Ne6 39. f3 Rd5 40. Bg3 Rd2 41. Ra8+ Kh7 42. Ra7 f6 43. Re7 Nd4 {And now ...Nxf3+ would win.} 44. Kh3 Rd1 45. Bf2 Nc6 46. Rc7 Ne5 47. Kg3 Nd7 48. Bc5 g5 49. Ba3 Kg6 50. Bb4 Rd3 51. Ra7 Ne5 {White must now prevent ...Nc6.} 52. Bf8 {[%csl Gf8][%cal Ra7g7]} Nd7 53. Bb4 h5 54. gxh5+ Kxh5 55. Ra6 Rb3 56. Be7 Kg6 57. Rd6 Rb7 58. Bd8 Kf7 {Accuracy: White = 83%, Black = 85%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Dziuba, Marcin"]
[Black "Olszewski, Michal"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2486"]
[BlackElo "2477"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,117,22,29,20,22,14,24,33,31,25,38,31,28,-25,-32,-29,-26,-25,-20,-21,-23,-33,-34,-28,-25,-25,-25,-16,-19,-25,-28,-32,-26,-20,-21,-27,-27,-37,-14,-23,-26,-56,-56,-53,-66,-60,-37,-80,0,0,0,0,0,0,0,0,9,-45,-50,-105,-100,-96,-117,-107,-111,-107,-65,-167,-164,-154,-134,-215,-215,-140,-16,-16,-16,-16,-16,-2458,-837,-4141,-4141,-4141,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,-16,0,-16,-16,-16,0,-14]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nb6 7. Be3 O-O 8. Bb5 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} Be6 9. Nf3 Nc4 10. Bxc4 {White has an edge.} Bxc4 11. Qa4 Ba6 12. O-O-O {[#]} Qd7 $146 ({Predecessor:} 12... Nd7 13. h4 Nb6 14. Qb3 Nc4 15. h5 Nxe3 16. fxe3 c5 17. hxg6 hxg6 18. e5 cxd4 19. exd4 {½-½ (32) Tkachiev,V (2632)-Macieja,B (2615) Santo Domingo 2002}) 13. Ne5 (13. Qa3 $142) 13... Qxa4 $11 14. Nxa4 b6 15. Nc3 Bb7 16. h4 c5 17. h5 cxd4 18. Bxd4 f6 19. Ng4 Nc6 20. hxg6 hxg6 21. Nh6+ Bxh6+ 22. Rxh6 Rfd8 23. Be3 $1 Rxd1+ 24. Kxd1 Rd8+ 25. Kc2 Ne5 26. f3 g5 27. Rh1 g4 28. fxg4 Nxg4 29. Bf4 Rd4 30. Re1 f5 (30... e5 $17 31. Bd2 Bc6) 31. Bb8 fxe4 32. Bxa7 Rd6 33. Bb8 ({Don't blunder} 33. Nxe4 $2 Re6 $19) 33... Rf6 34. a4 ({Don't go for} 34. Nxe4 $2 Re6 $19) 34... Rf2+ 35. Re2 (35. Kb3 $11) 35... e3 $15 {Strongly threatening ...Ba6.} 36. Bg3 (36. Kb3 $1 $15) 36... Ba6 $17 37. Bxf2 exf2 38. Rxf2 Nxf2 39. Nd5 Kf7 40. b4 (40. Nxb6 $15 Ke6 41. b4) 40... Bb7 41. Nxb6 Bxg2 42. Kc3 (42. Nc4 $17 {keeps fighting.}) 42... e5 $1 $19 43. b5 {[#]} Ne4+ (43... Bf1 $1 $17 {With the idea ...Ke6.} 44. Nd5 Ne4+ 45. Kb3 Ke6) 44. Kb4 $1 $11 Nd6 {And now ...Ke6 would win.} 45. a5 Bf1 46. Nd7 $2 {[%mdl 8192]} (46. a6 $11) 46... e4 $19 47. b6 e3 48. Kc3 {[#]} Nb7 $2 (48... Nc4 $1 $19 49. Nc5 Ne5) 49. Ne5+ $11 {[#]The position is equal.} Ke6 $1 50. Ng4 e2 51. Kd2 Nc5 {( -> ...Nd3!)} 52. Ne3 Nd3 53. Nc2 {aiming for b7.} Kd7 54. a6 Kc8 55. Ne1 Nc5 56. Nc2 {[#]} Nd3 $1 {[%mdl 512]} 57. Ne1 (57. Kxd3 e1=Q+) 57... Nb4 58. Nf3 Nd3 59. Ne1 {Accuracy: White = 67%, Black = 87%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Nasuta, Grzegorz"]
[Black "Heberla, Bartlomiej"]
[Result "1/2-1/2"]
[ECO "B10"]
[WhiteElo "2377"]
[BlackElo "2527"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,83,28,29,34,22,26,33,31,20,30,15,18,12,29,32,29,22,22,12,11,6,4,11,13,5,4,0,0,0,0,0,0,0,0,-26,0,-30,-14,-24,-21,-73,-78,-85,-62,-106,-30,-32,-39,-44,-48,-104,-103,-104,-94,-94,-24,-67,-67,-76,0,0,0,0,0,0,0,0,0,-18,-12,-52,-37,-58,-58,-58]} 1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Nf6 5. Qe2 Nxe4 6. Qxe4 Be6 {B11: Caro-Kann: Two Knights Variation.} 7. Be2 Nd7 8. d4 {[#]} Nf6 $146 {White is slightly better.} ({Predecessor:} 8... Bd5 9. Qe3 Bxf3 10. Bxf3 e6 11. O-O Bd6 12. d5 cxd5 13. Bxd5 O-O 14. Bxb7 Rb8 {1-0 (29) Munoz Pantoja,M (2512)-Garcia Gil,J (2122) Cornella de Llobregat 2019}) 9. Qd3 Bg4 10. O-O e6 11. h3 Bh5 12. c4 Be7 13. Be3 O-O 14. Rac1 Qc7 15. Ne5 Bxe2 16. Qxe2 Rfd8 17. Nd3 a5 18. Rfd1 a4 19. Qf3 Rac8 20. g4 b6 {[%cal Bb7b6,Bb6b5][%mdl 32]} 21. Kg2 c5 22. g5 Nd7 23. d5 exd5 24. cxd5 Bd6 25. Rc4 {[#]} (25. Bf4 $11 {remains equal.}) 25... b5 $1 $17 {[%cal Rb5c4]} 26. Rh4 Nf8 27. Nf4 Ng6 (27... Qd7 $17) 28. Nxg6 $11 hxg6 29. Re4 Re8 30. h4 ({White should play} 30. a3 $15) 30... Rxe4 $17 31. Qxe4 Qd7 32. Qf3 {[#]} Re8 (32... a3 $1 $17 {[%mdl 512]} 33. bxa3 Ra8) 33. h5 gxh5 34. Qxh5 Re4 (34... g6 $17 35. Qh3 Qxh3+ 36. Kxh3 Re4) 35. Rh1 $11 {[%csl Gh1][%cal Rh5h8]} Kf8 {Strongly threatening ...Qf5.} 36. Qf3 Qg4+ $1 37. Qxg4 Rxg4+ 38. Kf3 Rb4 39. Rb1 Ke7 40. Re1 {Hoping for Bxc5+.} Kd7 (40... Kd8 $5 {[%cal Rb4b2]} 41. Re2 Rh4 $15) 41. Re2 Rh4 42. b3 {Accuracy: White = 76%, Black = 86%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Sadzikowski, Daniel"]
[Black "Socko, Bartosz"]
[Result "1-0"]
[ECO "C87"]
[WhiteElo "2374"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,91,44,50,44,44,43,39,53,83,73,74,75,78,72,80,79,91,81,101,105,120,116,101,91,93,93,94,86,104,99,115,97,117,27,158,159,295,237,293,287,289,288,284,243,806,790,1447,1367,1769,1785,1604,1579,1204,684,677,675,427,431,6270,3334,1616,0,5821,2277,7304,7478,11386,8966,6195,5874,5173,29969,29966,29969,5493,29956,9288,8858]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 d6 7. c3 Bg4 8. d3 Nd7 9. Be3 {C87: Closed Ruy Lopez: Steinitz-type lines after 6 Re1 d6.} O-O 10. Nbd2 {[#]} Bf6 $146 ({Predecessor:} 10... f5 11. h3 fxe4 12. hxg4 exf3 13. Qb3+ Kh8 14. Qxb7 Na5 15. Qe4 c6 16. Bxc6 Nf6 17. Qxf3 Nxc6 18. Qxc6 Nxg4 {½-½ (46) Kurnosov,I (2577)-Iuldachev,S (2526) Tashkent 2008}) 11. h3 {White is slightly better.} Bxf3 12. Nxf3 Ne7 13. d4 {Hoping for Bxd7.} c6 14. Bb3 Qc7 15. Qe2 Rad8 16. Rad1 h6 17. dxe5 dxe5 18. Nh2 {Black must now prevent Ng4.} c5 19. Ng4 {Threatens to win with Rxd7!} Bg5 20. Bxg5 hxg5 21. Rd2 b5 22. Red1 c4 23. Bc2 f6 24. b4 (24. b3 $16) 24... Rfe8 {[#]} (24... Nb6 $11 {keeps the balance.}) 25. h4 $1 $16 {[%mdl 512]} gxh4 {[#]} (25... Nf8 $16) 26. Rxd7 $1 $18 {[%mdl 512]} Rxd7 {[#]} (26... Qxd7 27. Rxd7) 27. Nxf6+ $1 {[%mdl 512]} gxf6 28. Qg4+ {[%mdl 64] Double Attack} Kf7 29. Rxd7 Qc8 $2 (29... Qc6 30. Qh5+ Kf8) 30. Bd1 Rh8 31. Qf5 Qc6 32. Bh5+ Rxh5 33. Qxh5+ {[%mdl 4160] Endgame Double Attack. KQR-KQN} Ke6 34. Qg4+ f5 35. Rxe7+ $1 Kxe7 36. Qxh4+ {KQ-KQ} Kd7 (36... Qf6 $142 37. Qh7+ Kd6) 37. Qh7+ Kd8 38. Qh4+ (38. Qh8+ $142 Ke7 39. Qg7+ Ke8 40. Qxe5+ Kf7 41. Qxf5+ Ke8 42. g4) 38... Kd7 39. exf5 Qd5 40. Qh7+ Kd6 41. Qg6+ Kc7 42. f6 Kd6 43. f7+ (43. Qe8 $18 Qd1+ 44. Kh2) 43... Ke7 44. Qg7 Qxf7 45. Qxf7+ Kxf7 46. f3 {Accuracy: White = 89%, Black = 49%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.2"]
[White "Teclaf, Pawel"]
[Black "Bartel, Mateusz"]
[Result "1/2-1/2"]
[ECO "C52"]
[WhiteElo "2360"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,84,-19,-15,-24,-37,-32,-22,-12,-49,-37,-48,-38,-38,-37,-36,-37,-34,-34,-63,-63,-56,-31,-70,-29,-51,-45,-44,-49,-56,-37,-57,-54,-66,-5,-10,-6,-35,-62,-43,-30,-11,-21,-14,-14,-34,-27,-28,-31,-22,-7,-8,-15,-14,0,0,0,0,0,0,0,-14,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 Qd7 8. O-O Bb6 {C52: Evans Gambit Accepted: 5 c3 Ba5.} 9. Nbd2 $1 {[%mdl 4] now scores much better than the old 9.Bb5.} Na5 10. Qc2 {[#]} Qe7 $146 ({Predecessor:} 10... Nxc4 11. Nxc4 exd4 12. cxd4 Ne7 13. a4 c6 14. Ba3 Bc7 15. e5 dxe5 16. dxe5 O-O {½-½ (39) Mamedyarov,S (2747)-Ding,L (2766) Huaian 2016}) 11. a4 Nf6 12. Ba3 c5 ({But not} 12... Nxc4 13. Nxc4 c5 14. Nxd6+ (14. dxe5 dxe5 15. Nfxe5 Bc7 $11) 14... Qxd6 15. dxe5 $14) 13. Bb5+ Nd7 14. Rfe1 O-O 15. Nf1 Nf6 16. dxe5 dxe5 17. Ne3 Bc7 18. Bd3 Bg4 19. Nxg4 Nxg4 20. Nd2 Rfd8 {aiming for ...Qh4.} 21. Be2 Nf6 22. Nf1 Qe6 23. Rab1 c4 (23... Bb6 $15) 24. Bb4 $1 $11 Qc6 25. Ne3 Qxe4 ({Not} 25... Nxe4 $2 26. Bf3 $18) 26. Qa2 Rd7 27. Bf3 Qf4 {[#] Strongly threatening ...e4.} 28. Bxa5 $1 Bxa5 29. Bxb7 Rad8 {And now ...Rd2 would win.} 30. g3 Qg5 31. Qxc4 h5 {The position is equal.} 32. Rb5 {[#] Bc6 is the strong threat.} Rc7 33. h4 Qxe3 34. Rxe3 Rxc4 35. Rxa5 Rd1+ 36. Kg2 Ng4 37. Rf3 g6 38. Rd5 $1 {[%cal Rd5d1]} Rxd5 $1 39. Bxd5 Rc7 40. c4 Kf8 41. Rb3 Nf6 42. Rb5 Ke7 {Accuracy: White = 87%, Black = 87%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.3"]
[White "Bartel, Mateusz"]
[Black "Teclaf, Pawel"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "2615"]
[BlackElo "2360"]
[Annotator "TA"]
[PlyCount "122"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,122,-42,-18,-4,-10,0,0,0,0,-8,0,0,0,0,62,63,106,104,56,52,86,71,76,77,94,89,79,-24,-29,-43,-37,-61,-41,-76,-75,-72,-68,-152,-123,-120,-123,-123,-127,-241,-236,-354,-304,-304,-295,-293,-302,-293,-285,-324,-308,-312,-306,-306,-287,-346,-351,-345,-326,-346,-338,-356,-354,-335,-324,-344,-334,-331,-291,-373,-358,-396,-394,-408,-402,-405,-397,-383,-358,-519,-519,-686,-418,-1077,-680,-587,-302,-306,-275,-565,-558,-800,-779,-975,-888,-12837,-12832,-3420,-6300,-6620,-7204,-29987,-29978,-12845,-12845,-12845,-12844,-12846,-12845,-29991,-29992]} 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Bg2 d5 5. b3 Be7 6. Nf3 {A34: Symmetrical English: 2 Nc3, lines with ...d5.} d4 7. Na4 $1 Nc6 {[#]} 8. Ba3 $146 {The position is equal.} ({Predecessor:} 8. Nb2 O-O 9. Nd3 Bd6 10. O-O e5 11. Ng5 Bf5 12. e4 Bg6 13. f3 h6 14. Nh3 {0-1 (41) Karwen,W (1498)-Horch,H (1697) Binz 2013}) 8... Nd7 9. e3 e5 10. O-O O-O 11. exd4 e4 (11... exd4 $11 12. d3 Rb8) 12. Ne5 $1 $14 {[%cal Re5d7]} cxd4 13. Nxc6 bxc6 14. Bb2 Nf6 {[#]} 15. d3 $1 {[%cal Rd3e4]} Bg4 16. Qd2 exd3 17. Qxd3 c5 18. Rfe1 (18. Bxa8 $16 Qxa8 19. Rfe1 (19. f3 Bd7 $14)) 18... Rc8 $11 19. Ba3 Bd6 20. Qd2 Nd7 21. f4 Nf6 22. Nb2 Bf5 23. h3 (23. Bb7 $15) 23... Nh5 24. Qf2 Qa5 25. Na4 Bd7 26. Bf3 (26. Nxc5 $17 Bxc5 27. Bxc5 Rxc5 28. Qxd4) 26... Nf6 $19 ({Don't do} 26... Bxa4 27. Bxh5 Bd7 28. Bc1) 27. Bd1 (27. Bxc5 $142 Bxc5 28. Nxc5 Qxc5 29. Re5) 27... Bxh3 28. Bc1 Bf5 29. Bd2 Qc7 30. Bf3 Rfe8 31. Rxe8+ Rxe8 32. Re1 Rxe1+ 33. Qxe1 h5 34. Nb2 {[#]} h4 $1 {[%mdl 512]} 35. g4 (35. gxh4 Bxf4) 35... Bxg4 36. Bxg4 Nxg4 37. Qxh4 Bxf4 {...f5 is the strong threat.} 38. Qxg4 Bxd2 39. Nd3 g6 40. Kg2 Be3 41. Qe4 Qa5 42. Qe8+ Kg7 {Threatens to win with ...Qd2+.} 43. Qe5+ Kh7 {Hoping for ...Qd2+.} 44. Qh2+ {[#]} Bh6 $1 45. Kf3 Qd8 46. Qe5 (46. Ke2 $142) 46... Qh4 47. Kg2 Qg4+ 48. Kh2 (48. Qg3 $142 Qe2+ {[%mdl 64] Double Attack} 49. Nf2) 48... Qf3 49. Qg3 Qxg3+ 50. Kxg3 {[%mdl 4096] Endgame KB-KN} Bf8 51. Kf3 $2 (51. b4) 51... f5 52. a3 a5 53. Ne5 g5 54. Nc6 g4+ 55. Ke2 Bd6 56. Nxa5 f4 57. Nb7 f3+ 58. Kf2 d3 59. Ke3 g3 {( -> ...g2)} 60. Nxd6 g2 61. Kf2 d2 {Accuracy: White = 43%, Black = 89%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.3"]
[White "Pakleza, Zbigniew"]
[Black "Piorun, Kacper"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2555"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "102"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,101,-6,2,0,0,0,-7,12,13,0,18,15,43,0,0,0,0,-46,-34,-32,-15,-56,-21,-60,-65,-64,-68,-61,-61,-70,-63,-63,-78,-69,0,-179,-179,-178,-178,-175,-169,-177,-177,-190,-190,-190,-190,-220,-208,-236,-209,-269,-237,-237,-230,-203,-193,-220,-201,-195,-206,-273,-289,-293,-279,-390,-374,-424,-368,-416,-422,-411,-398,-533,-535,-597,-603,-656,-625,-640,-639,-729,-760,-757,-706,-781,-789,-29961,-2885,-1082,-866,-826,-545,-29999]} 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. e3 Bd6 5. d4 O-O 6. Be2 {A17: English Opening: 1...Nf6 with ...Bb4.} dxc4 7. Bxc4 c5 8. O-O {The position is equal.} cxd4 9. exd4 Nc6 10. Qe2 Nd5 11. Ne4 Be7 12. Rd1 b6 {[#]} 13. Bg5 $146 ({Predecessor:} 13. a3 Bb7 14. Neg5 Na5 15. Bd3 g6 16. Bc2 Rc8 17. h4 Qc7 18. Ne1 Nf4 19. Bxf4 Qxf4 20. b4 {0-1 (47) Kursova,M (2351)-Bronnikova,E (2245) Belgrade 2013}) 13... Bb7 14. Rac1 Rc8 15. a3 h6 {[%cal Re7g5]} 16. Bxe7 Ncxe7 17. g3 Nf5 18. Ba6 Qe7 19. Rxc8 Rxc8 20. Bxb7 Qxb7 21. Ne5 Nde3 ({Black should play} 21... Qc7 $15 22. Nf3 g5) 22. fxe3 $2 {[#] Black keeps a firm grip on the game.} (22. Qf3 $1 $11 Nd5 23. Nc3) 22... Qxe4 $19 23. Qf3 Qxf3 24. Nxf3 Nxe3 {[%mdl 4096] Endgame KRN-KRN} 25. Re1 Nd5 26. Re2 a5 27. Kf2 Kf8 28. Ne5 Ke7 29. Rd2 f6 30. Ng4 Kd6 31. Ke2 Rc1 32. Nf2 Kc6 33. Kf3 h5 34. Re2 Kd7 35. h3 g5 36. Rd2 Re1 37. Rd3 Kc6 38. Rd2 Re3+ 39. Kg2 h4 40. gxh4 gxh4 41. Kh2 Nf4 42. Rc2+ Kd5 43. Rc8 Kxd4 44. Rd8+ Nd5 45. Rh8 Re2 46. Kg1 Ke3 47. Ng4+ Kf3 48. Rxh4 Kg3 (48... f5 $142 49. Rh7 fxg4 50. hxg4 Rxb2 51. Rh3+ Kxg4 52. Rh7 Ra2 53. Kf1 Rxa3 54. Ke2 b5 55. Kd2 a4 56. Kc2 Ra2+ 57. Kd3 a3 58. Rg7+ Kf5 59. Rf7+ Ke5 60. Rf1 b4 61. Re1+ Kd6 62. Rh1 Rb2 63. Rh8 a2 64. Ra8 Rb3+ 65. Ke2 Ra3 66. Rxa3 bxa3 67. Kf2 a1=Q 68. Kf3 a2 69. Kf2 Qb2+ 70. Kf3 a1=Q 71. Kg3 Qg1+ 72. Kh4 Qh8#) 49. Kf1 Nf4 50. Rh8 Rxb2 {[%cal Rb2b1] [#]} 51. Nxf6 Rb1# {Accuracy: White = 48%, Black = 81%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.3"]
[White "Gajewski, Grzegorz"]
[Black "Janik, Igor"]
[Result "1-0"]
[ECO "D26"]
[WhiteElo "2515"]
[BlackElo "2531"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,107,20,28,22,18,15,27,31,10,11,45,38,31,17,40,0,0,0,0,0,0,0,22,33,38,41,114,103,118,112,109,120,150,67,64,56,63,66,56,56,75,59,106,91,133,67,67,65,61,61,70,70,78,72,97,88,364,364,430,379,364,364,429,416,429,424,388,388,997,993,939,932,1240,1170,1041,577,952,935,936,825,6099,6075,29985,2567,5654,5208,5061,2381,4133,3260,29979,29980]} 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 a6 6. O-O b5 7. Bd3 Bb7 8. a4 b4 9. Qe2 c5 10. Nbd2 {[%cal Bb1d2,Bd2c4,Bc4e5][%mdl 32] D28: Queen's Gambit Accepted: Classical main line: 7 Qe2 with early ...Nc6.} Be7 11. Nc4 O-O 12. a5 {White has an edge.} Nbd7 13. Rd1 Qb8 14. Bd2 Rd8 15. Rac1 {[#]} Bc6 $146 ({Predecessor:} 15... cxd4 16. exd4 Bd5 17. Nfe5 Nxe5 18. dxe5 Nd7 19. Bf4 Qb7 20. Qg4 Nc5 21. Nd6 Bxd6 22. exd6 Rac8 23. Rxc5 Rxc5 24. Qh4 {1-0 (24) Tukmakov,V (2565)-Speelman,J (2600) Tilburg 1994}) 16. Nce5 Ba4 17. Re1 {And now b3 would win.} Nxe5 18. Nxe5 Be8 19. Nc4 cxd4 20. Nb6 Ra7 21. exd4 Qb7 (21... Nd5 $14) 22. Bf4 $16 Bc6 {[#]} 23. Be5 $1 Nd7 24. Nxd7 Rxd7 25. Bxh7+ (25. Qg4 $16 {[%csl Ge5][%cal Rg4g7]} Bf8 26. Qh4) 25... Kxh7 $14 26. Qc2+ {[%mdl 64] Double Attack} Kg8 27. Qxc6 Qxc6 28. Rxc6 Rd5 29. Bc7 b3 30. Bb6 Ra8 31. Re3 ({Better is} 31. Kf1 $16) 31... Bb4 $1 32. Rxb3 Bxa5 {With the idea ...Rb8.} 33. Bc5 e5 34. g3 exd4 {[#] ...d3 is the strong threat.} 35. Rd3 $36 {[%mdl 2048] Black is under strong pressure.} Rad8 36. b4 Rxc5 $4 {[%mdl 8192] Loses the game.} (36... Rb8 $16) 37. bxc5 $16 {[%mdl 4096] Endgame KRR-KRB} Rd5 38. Rd6 Rxc5 39. R3xd4 ({Don't play} 39. R6xd4 Bb6 $18) 39... Rc1+ 40. Kg2 Be1 41. Rxa6 Rc2 42. Rf4 Bd2 $2 (42... Rc7 43. Rfa4 Rc2) 43. Ra8+ $18 Kh7 44. Rxf7 Be3 45. h4 Bd4 46. Rf4 Be5 47. Rf5 Bd4 48. h5 Rb2 49. g4 {White threatens g5 and mate.} g6 50. hxg6+ (50. Rf7+ $142 Kh6 51. Rg8 Rb6 52. f4 Be5 53. fxe5 Rc6 54. Rxg6+ Rxg6 55. hxg6) 50... Kxg6 51. Ra6+ Kg7 52. Kg3 Rb3+ 53. f3 Rb1 54. Rd5 {Accuracy: White = 78%, Black = 42%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.3"]
[White "Gumularz, Szymon"]
[Black "Tomczak, Jacek"]
[Result "0-1"]
[ECO "A28"]
[WhiteElo "2513"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,52,0,5,5,9,9,11,0,0,0,0,-3,0,0,0,0,-1,-12,7,-9,-23,-28,-39,-46,-37,-47,-50,-59,-61,-70,-69,-247,-246,-393,-394,-418,-394,-510,-497,-497,-79,-405,-387,-923,-905]} 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4 Bb4 5. d3 d6 6. a3 {A28: English Opening: Four Knights Variation.} Bc5 7. b4 Bb6 8. Na4 {The position is equal.} Bd4 9. Nxd4 {9.Rb1 gains popularity. Played by Ian Nepomniachtchi in May 2020.} Nxd4 10. Nc3 a5 11. b5 {[#]} a4 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 11... O-O 12. Be2 c6 13. O-O cxb5 14. Nxb5 Nxb5 15. cxb5 a4 16. Bb2 Be6 17. f3 Nh5 {0-1 (38) Najer,E (2635)-Giri,A (2780) Khanty-Mansiysk 2019}) 12. Nxa4 c6 {aiming for ...Qa5+.} 13. Nc3 $1 d5 (13... Nd7 {seems wilder.} 14. Be2 Nc5 15. O-O O-O 16. a4 f5) 14. bxc6 dxc4 15. dxc4 bxc6 16. Bd3 Nd7 {[%mdl 1024] Black has compensation.} 17. O-O Nc5 {Strongly threatening ...Ndb3.} 18. Rb1 O-O 19. a4 Qa5 $1 {[%csl LRa4,LRc3]} 20. Ba3 $2 (20. Ne2 $1 $15) 20... Nxd3 $19 21. Bxf8 (21. Qxd3 {was forced.} Qxc3 {[%mdl 64] Remove Defender, Deflection, Decoy} 22. Qxc3 Ne2+ {[%mdl 64] Double Attack} 23. Kh1 Nxc3 24. Rbc1 Nxe4 25. f3) 21... Qxc3 22. Bd6 Be6 23. Qh5 Nf4 24. Qxe5 {If only White now had time for Kh1....} Nde2+ 25. Kh1 {[#] White wants to play Qxc3.} Bh3 $1 {[%csl Gf4][%cal Rh3g2][%mdl 512]} 26. Rg1 $2 {[#]} (26. Qxf4 Nxf4 27. Bxf4) (26. gxh3 Qf3#) 26... Nd3 $1 {[%mdl 576] Double Attack. Accuracy: White = 67%, Black = 91%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.4"]
[White "Socko, Bartosz"]
[Black "Sadzikowski, Daniel"]
[Result "1/2-1/2"]
[ECO "E09"]
[WhiteElo "2609"]
[BlackElo "2507"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,99,0,0,0,13,0,-3,0,-3,-34,-25,-25,-31,-25,-14,-6,-12,0,-11,-12,9,-8,-4,-5,-7,-8,-4,-5,0,0,7,0,0,0,0,0,0,-3,-7,-9,-2,-8,-8,-12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6 {[%cal Bb7b6,Bb6b5][%mdl 32]} 9. Rd1 Bb7 10. b3 {E06: Closed Catalan: Early deviations.} c5 11. e3 Rc8 12. Bb2 b5 {[#]} 13. Ne5 $146 ({Predecessor:} 13. dxc5 Bxc5 14. Qb1 Qb6 15. b4 Be7 16. c5 Qc7 17. Nd4 a6 18. a4 bxa4 19. Rxa4 {½-½ (66) Muse,M (2510)-Kalka,A (2378) Germany 2001}) 13... cxd4 14. exd4 Nxe5 15. dxe5 Nd7 16. Qb1 {The position is equal.} bxc4 17. bxc4 Nb6 18. Bd4 Qc7 19. Bxb6 axb6 20. cxd5 exd5 21. Qb2 Bc5 22. Nb3 Rfd8 23. Rd3 Ba8 24. Rad1 {[%cal Rg2d5]} d4 25. f4 Bxg2 26. Qxg2 Ra8 27. Kh1 {[%cal Rb3d4]} Ra4 28. R1d2 g6 29. Qe4 Qa7 30. e6 {[%cal Rb3d4]} Qa8 (30... f5 {with more complications.} 31. e7 Bxe7 32. Qe6+ Kg7 33. Nxd4 Qb7+) 31. Qxa8 Rdxa8 32. Nxd4 Bxd4 33. exf7+ Kxf7 {[#] And now ...Bc5 would win.} 34. Rxd4 Rxd4 35. Rxd4 Rxa2 $11 {[%mdl 4096] Endgame KR-KR} 36. Rb4 Ra6 37. Kg2 Ke6 38. Kf3 Kd5 39. Rb1 Kc5 40. Rc1+ Kd6 41. Rd1+ Ke6 42. Rb1 Kd5 43. Kg4 h6 44. f5 gxf5+ 45. Kxf5 Kc4 46. Rc1+ Kd5 47. Rd1+ Kc5 48. Rc1+ Kd5 49. Rb1 Kc4 50. Rc1+ {Not much happened in this game. Accuracy: White = 97%, Black = 100%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.4"]
[White "Piorun, Kacper"]
[Black "Pakleza, Zbigniew"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2539"]
[BlackElo "2555"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,65,47,47,44,47,40,48,39,61,42,55,51,70,53,70,60,101,89,98,106,103,70,77,64,72,69,106,92,106,91,433,302,305,236,458,440,620,614,684,545,537,522,542,546,545,433,447,0,394,343,575,566,550,500,941,918,29976,29974]} 1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. h3 b5 5. Bd3 e5 6. Nf3 {B07: Pirc Defence: Miscellaneous Systems.} Nbd7 7. O-O Be7 8. Ne2 {White is slightly better.} O-O {[#]} 9. Ng3 $146 ({Predecessor:} 9. c3 Bb7 10. Ng3 Re8 11. a4 a6 12. Re1 Bf8 13. Nf5 d5 14. dxe5 dxe4 15. exf6 Nxf6 {½-½ (31) Muench,I (2185)-Solonar,S (2310) Weilburg 1996}) 9... Re8 10. c3 Bf8 11. a4 bxa4 12. Qxa4 Qb6 13. Be3 {[#] dxe5 is the strong threat.} Qc7 14. Qa5 $36 {[%mdl 2048] White is in control.} Qb7 15. dxe5 Nxe5 16. Nxe5 Rxe5 17. Qa4 {Black is now going downhill.} c5 18. Bf4 Bd7 19. Qa6 Qxb2 $2 {[%mdl 8192]} (19... Qxa6 $16 20. Rxa6 Ree8) 20. Bxe5 dxe5 21. Bc4 Be8 $2 (21... Bc8 22. Qa5 Qb7) 22. Rab1 $18 Qxc3 (22... Qc2 $142 23. Rfc1 Qa4 24. Bxf7+ Kh8 25. Qxa4 Bxa4) 23. Rfd1 h5 24. Qb7 h4 25. Nf5 {[%cal Bg3f5,Bf5e3,Be3d5][%mdl 32] [#] Threatens to win with Ne3.} (25. Qxa8 hxg3 26. Rbc1 gxf2+ 27. Kxf2 Qa3 $18) 25... Qxc4 26. Qxa8 Kh7 27. Rb8 Qa4 28. Rbb1 $2 (28. Rbd8 $18) 28... c4 $2 {[%mdl 8192]} (28... Qc4 $1 $11 29. Nxh4 Qxe4 30. Qxe4+ Nxe4) 29. Ra1 Qc2 $2 (29... Qb5 {was necessary.} 30. Rdb1 Qc6) 30. Ne3 Qe2 31. Re1 Qd3 (31... Qd2 $142 32. Qc8 Qd7 33. Qxc4 Qd4) 32. Nd5 Nxe4 33. Rxe4 {[%mdl 64] Double Attack. Accuracy: White = 81%, Black = 38%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.4"]
[White "Janik, Igor"]
[Black "Gajewski, Grzegorz"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2531"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,114,4,6,15,6,6,0,0,7,0,0,0,0,0,17,12,63,-11,0,-9,-15,-14,-17,-26,8,0,12,8,43,33,33,40,29,18,42,39,35,14,8,-52,-52,-52,-60,-52,51,51,51,51,52,52,55,49,54,52,50,49,50,56,109,53,91,52,64,55,111,91,157,142,128,130,164,147,142,0,0,6,3,9,15,0,0,7,8,0,77,9,12,0,0,0,0,0,0,0,0,0,0,0,0,-9,0,0,-9,-25,0,0,12847]} 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 dxc4 5. Qa4+ Bd7 6. Qxc4 {A13: English Opening: 1...e6.} c5 7. Ne5 Qc8 8. O-O Nc6 9. Nxd7 Qxd7 10. Nc3 Be7 11. d3 O-O 12. Bg5 b6 (12... Rfc8 $11) 13. b4 (13. d4 $1 $14) 13... Rac8 $11 {[#]} 14. bxc5 $146 ({Predecessor:} 14. Bxc6 Rxc6 15. b5 Rd6 16. Be3 Rc8 17. Qb3 Ng4 18. Rad1 h5 19. Bc1 Rd4 20. a3 {0-1 (49) Reizniece Ozola,D (2283)-Schmidt Schaeffer,S (2373) Germany 2018}) 14... Nd4 15. c6 Nxc6 {[#] Strongly threatening ...Nd4.} 16. Qa4 h6 (16... Rfd8 $5 {[%cal Rc6d4]} 17. Be3 Nd4 18. Qxd4 Qxd4 19. Bxd4 Rxd4 $11) 17. Bxf6 Bxf6 18. Rac1 Nb8 19. Qxd7 Nxd7 20. Nb5 $1 a6 21. Nd6 Rxc1 22. Rxc1 Nc5 23. Nc4 Na4 24. e3 ({White should try} 24. Rc2 $11) 24... Rc8 $1 $15 25. Bb7 Rc7 $1 {[%cal Rc7b7]} 26. Bxa6 Nc5 (26... Ra7 $1 $15 27. Bc8 Nc3) 27. Bb5 $14 Nxd3 28. Rb1 Ne5 29. Nxb6 Rb7 30. Nc8 Nf3+ 31. Kg2 Nd2 32. Rd1 {And now Nd6 would win.} Rxb5 33. Rxd2 {[%mdl 4096] Endgame KRB-KRN} g6 (33... Ra5 $14) 34. Nd6 ({Better is} 34. a4 $16 Rc5 35. Nd6) 34... Rb4 35. Kf3 Be5 36. Ne4 Kg7 (36... Rc4 $14) 37. Rd7 $16 Rc4 (37... g5 $142) 38. Ra7 g5 {With the idea ...g4+!} 39. h3 Kg6 40. g4 f5 {[#]} 41. gxf5+ (41. Ng3 $1 $16) 41... exf5 $11 42. Ra6+ Kg7 43. Nd2 Rc2 44. Nb3 h5 45. Ra5 g4+ 46. hxg4 hxg4+ 47. Kg2 Kf6 48. Nc5 {Threatens to win with Nd7+.} Bd6 49. Ra6 Ke7 50. Nd3 g3 51. Kf3 Rd2 52. Ra7+ Kf6 (52... Ke6 $5 53. Nf4+ $8 Bxf4 54. exf4 gxf2 $11) 53. Ra6 Rxd3 54. fxg3 Ke5 {Hoping for ...Bc5.} 55. Ra5+ Ke6 {Threatening ...Rc3.} 56. Ra6 Ra3 57. Rxa3 Ke5 $2 {[%mdl 40960] Accuracy: White = 87%, Black = 74%. . An unexpected result.} (57... Bxa3 $11 58. e4 Kf7) 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.22"]
[Round "1.4"]
[White "Teclaf, Pawel"]
[Black "Bartel, Mateusz"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2360"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,100,15,12,9,10,8,11,16,19,0,3,-15,-8,-18,0,-43,-40,-64,-52,-50,-40,-36,-27,-88,-81,-88,-87,-80,-89,-139,-73,-80,-78,-72,-53,-63,-62,-66,-41,-95,-25,-36,-37,-47,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,11,4,0,3,0,0,0,197,193,283,91,106,58,225,130,119,116,130,9,49,49,49,49,49,49,58,58,62,65,65,65,47]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 d6 5. Na4 Qf6 6. Nxc5 {C50: Hungarian Defence and Giuoco Pianissimo.} dxc5 {[#]} 7. d3 $146 ({Predecessor:} 7. c3 Be6 8. Qb3 Bxc4 9. Qxc4 b6 10. O-O Nge7 11. b4 cxb4 12. cxb4 Rc8 13. Bb2 {½-½ (30) Bonade,M (2097)-Passerotti,P (2231) Biella 2017}) 7... h6 8. Be3 {The position is equal.} b6 9. h3 Nge7 10. Qe2 Be6 11. Nd2 Bxc4 12. dxc4 Nd4 $36 {[%mdl 2048] Black fights for an advantage.} 13. Qd1 Qg6 14. O-O Rd8 15. c3 O-O 16. Nb1 (16. b4 $11) 16... Ne6 $17 17. Qg4 Rd3 18. Qxg6 Nxg6 19. Nd2 Rfd8 (19... Nh4 $142 20. Nb3 Rfd8) 20. Nf3 f6 21. Rfc1 Kf7 22. Kf1 Ngf4 23. h4 g5 24. g3 (24. hxg5 $15 hxg5 25. g3) 24... Ng6 (24... g4 $17 25. Ng1 R3d7) 25. hxg5 hxg5 26. Ke2 R3d6 (26... Nef4+ {is more complex.} 27. Kf1 a5 28. Re1 a4 29. a3 Ne7) 27. Rh1 Rh8 28. Rxh8 Nxh8 29. Rh1 Kg7 30. Nh2 Nf7 31. Ng4 Rd8 32. f3 Nd6 33. b3 Nf8 34. Bc1 Ng6 35. Ne3 Ne7 36. Bd2 Kg6 37. Ng4 {Hoping for Rh6+.} Nf7 38. f4 Nd6 $2 (38... exf4 $11 {and Black is okay.} 39. gxf4 Nc8) 39. Rh6+ $18 Kg7 (39... Kf7 {was called for.}) 40. fxg5 $2 (40. fxe5 $18 {and the rest is easy.} Ng8 41. exf6+ (41. exd6 Nxh6 42. dxc7 Rc8 $17) 41... Nxf6 42. Rxf6 Nxe4 43. Rc6 (43. Bxg5 Nxg5 44. Rc6 Re8+ 45. Ne3 Ne6 $16) 43... Nxd2 44. Rxc7+ {[%mdl 64] Double Attack} Kg6 45. Rc6+ (45. Rxa7 Ne4 $16) 45... Kg7 46. Nf6) 40... f5 $16 41. Re6 Ng6 $2 {[#]} (41... Nxe4 $14 42. Rxe7+ {[%mdl 64] Double Attack} Kf8 43. Rxc7 (43. Rxe5 Rxd2+ 44. Ke3 fxg4 $14) 43... Rxd2+ 44. Ke3 Rd1) 42. Nxe5 ({Better is} 42. Rxd6 $1 $18 {[%mdl 512]} cxd6 43. exf5) 42... Nxe5 43. Rxe5 Nxe4 $18 {[%mdl 4160] Endgame [#] Double Attack. KRB-KRN} 44. Be1 ({White should play} 44. Bf4 $1 $16) 44... Nxg5 45. Rxf5 {White is slightly better.} Re8+ 46. Kd1 Kg6 47. Rf4 Rh8 48. Bd2 Rh1+ 49. Kc2 {Strongly threatening Rg4.} Ne6 50. Rf2 Rg1 {Blacks defense is rewarded with a draw. Accuracy: White = 73%, Black = 73%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.5"]
[White "Piorun, Kacper"]
[Black "Pakleza, Zbigniew"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2601"]
[BlackElo "2500"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,115,-31,-26,-14,-15,-23,-12,-30,-30,-30,-29,-37,-36,-42,-31,-57,-35,-32,-21,-29,-29,-41,-29,-39,-31,-40,-29,-31,-8,-12,-6,-8,0,-21,-6,-6,-8,-15,-7,-27,0,-7,0,-10,0,0,0,0,0,0,0,0,0,-13,12,-7,34,27,75,86,104,54,95,54,66,75,307,309,285,304,417,417,387,423,530,530,492,517,518,508,653,685,737,675,683,643,659,641,600,573,961,925,938,885,928,899,1310,1283]} 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 c4 7. Nbd2 Na5 8. g3 Bd7 9. Bg2 h6 10. O-O Ne7 11. Rb1 {C02: French: Advance Variation.} Qc7 12. Re1 Nc8 13. h4 {The position is equal.} Nb6 14. Nf1 Be7 15. N1h2 O-O-O {[#]} 16. Bh3 $146 ({Predecessor:} 16. Ng4 Rdg8 17. Bf4 Kb8 18. Qe2 Ka8 19. Nd2 Ba4 20. Nf1 Qd8 21. Nfh2 Qf8 22. Bf3 {0-1 (41) Low,Z (1997)-Gong,Q (2349) Yangon 2014}) 16... Kb8 17. Rf1 a6 18. Qe2 Ka7 19. Kg2 Rde8 20. h5 Bd8 21. Bf4 Ba4 22. Rbe1 Nc6 {[%cal Ba5c6,Bc6e7,Be7f5][%mdl 32]} 23. Qd2 Ne7 24. Rh1 Reg8 25. Ng4 Nf5 26. Qe2 Qc6 27. Kg1 Qb5 28. Bg2 Qb3 29. Rc1 Bd7 30. Qd2 Ba4 (30... Qa2 {seems wilder.} 31. Kh2 Na4 32. Rc2 Qb3 33. Rb1 Be7) 31. Ne3 Nxe3 32. Bxe3 Qb5 33. Bf1 Nc8 34. Be2 Ne7 35. Nh4 Nc6 36. b4 Be7 37. Ng2 a5 38. g4 axb4 39. axb4 Kb6 40. Rb1 Kc7 41. Rh3 Ra8 42. f4 f5 $2 {[#] Black cannot hold the game after this.} (42... Na5 $16 {is a better defense.}) 43. gxf5 $18 exf5 44. Bf2 Na5 45. Ne3 Nb3 46. Qe1 Rhf8 {White is clearly winning.} 47. Bf3 Rad8 48. Rg3 Kb8 49. Bg2 Rf7 50. Rg6 Bf8 51. e6 Rc7 52. Nxf5 Bxb4 53. cxb4 c3 {intending ...c2.} 54. e7 Rh8 {...c2 would now be nice for Black.} 55. Nd6 Qxb4 56. e8=Q+ {[%mdl 64] [#] Promotion} Bxe8 57. Nxe8 c2 58. Nxc7 {Accuracy: White = 93%, Black = 68%.} ({Inferior is} 58. Qxb4 cxb1=Q+ 59. Bf1 Rxe8 $11) 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.6"]
[White "Krzyzanowski, Marcin"]
[Black "Krasenkow, Michal"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2521"]
[BlackElo "2602"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,80,28,37,0,13,0,4,-13,-12,-34,-50,-68,-72,-69,-64,-64,-56,-68,-48,-65,-61,-111,-108,-108,-102,-91,-43,-59,-64,-62,-51,-199,-185,-183,-172,-167,-175,-214,-219,-221,-200,-222,-198,-218,-175,-225,-221,-228,-231,-229,-223,-222,-203,-213,-152,-259,-257,-285,-283,-300,-303,-290,-287,-305,-313,-307,-301,-293,-302,-290,-271]} 1. d4 d5 2. Nf3 c6 3. Bf4 Bf5 4. e3 Qb6 5. Qc1 e6 6. Be2 Nf6 7. h3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} c5 8. O-O Nc6 {[%cal Rc5d4]} 9. dxc5 {The position is equal.} (9. c4 {keeps more tension.} cxd4 10. Nxd4 Nxd4 11. exd4 dxc4 12. Qxc4 Bd6 13. Bxd6 Qxd6 14. Qa4+) 9... Bxc5 10. c4 d4 {[#]} 11. exd4 $146 ({Predecessor:} 11. b3 Rd8 12. exd4 Nxd4 13. Nxd4 Bxd4 14. Be3 Bxe3 15. fxe3 O-O 16. Nc3 h6 17. Kh1 {0-1 (44) Blot,J (2253)-Rausis,I (2508) Montpellier 1999}) 11... Nxd4 12. Nxd4 Bxd4 13. Nc3 Ne4 $1 {[%cal Re4f2]} 14. Nd1 O-O 15. Be3 e5 16. Re1 Qa5 17. Rf1 Rac8 18. a3 Qa4 19. Bxd4 exd4 20. b4 $1 Qd7 $36 {[%mdl 2048] White is under pressure.} 21. Bd3 {[#] Loses the game.} (21. Qf4 $15) 21... Ng3 $1 $19 {[%mdl 576] Discovered Attack} 22. fxg3 Bxd3 23. Rf4 Bxc4 ({And not} 23... Rxc4 24. Qd2 $11) 24. Qd2 d3 25. Ne3 Be6 26. Kh2 Rfd8 27. Rd1 Qa4 28. Qb2 {intending Rd4.} Qb3 29. Qxb3 Bxb3 30. Rd2 Rc3 31. b5 g6 32. g4 Re8 33. Rf3 {[#]} (33. Nd1 $17 Bxd1 {[%mdl 64] Discovered Attack} 34. Rxd1) 33... Re5 $1 {Black has a decisive advantage.} 34. g5 Rxg5 35. Ng4 Rxb5 36. Nf6+ Kg7 37. Ne8+ Kf8 38. Nd6 Re5 39. Rdxd3 Rxd3 40. Rxd3 Bd5 {Accuracy: White = 74%, Black = 87%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.7"]
[White "Olszewski, Michal"]
[Black "Dziuba, Marcin"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "2551"]
[BlackElo "2585"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,52,-14,-18,-18,-10,-10,-11,-6,0,-14,16,-18,-33,-20,19,4,7,-47,-50,-71,-56,-70,-30,-12,-17,-12,-9,-127,-118,-100,-104,-175,-183,-493,-515,-523,-513,-681,-702,-624,-589,-823,-635,-1446,-1469]} 1. e4 c5 2. Ne2 Nc6 3. Nbc3 Nd4 4. d3 g6 5. Be3 Bg7 $1 6. Qd2 {B23: Closed Sicilian: Lines without g3.} d6 7. Nd1 e5 (7... d5 {keeps more tension.} 8. f4 Nxe2 9. Bxe2 d4 10. Bf2 e5) 8. c3 {The position is equal.} Nc6 {[#]} 9. d4 $146 ({Predecessor:} 9. g3 Nf6 10. h3 d5 11. Bxc5 dxe4 12. d4 Nd7 13. Ba3 Nb6 14. Ne3 Be6 15. Rd1 {0-1 (27) Vastrukhin,O (2294)-Golovin,L (2463) Voronezh 2008}) 9... Nf6 {[#] And now ...exd4 would win.} 10. f3 cxd4 11. cxd4 d5 12. dxe5 Nxe5 13. Bd4 ({White should try} 13. Nec3 $1 $11) 13... Nc6 $36 {[%mdl 2048] Black has good play.} 14. e5 Nd7 15. f4 Nxd4 16. Nxd4 O-O 17. Nc3 Nc5 18. b4 (18. Qe3 $11 {keeps the balance.}) 18... Ne4 $17 19. Nxe4 dxe4 20. Bc4 {[#]} (20. Nb5 $17) 20... Qb6 $1 $19 21. Nb5 $2 (21. Nc2) 21... Be6 {Black is clearly winning.} 22. Bxe6 fxe6 23. a4 Rad8 24. Qf2 e3 25. Qe2 {If White can now play Qc4 this consolidates a bit.} a6 26. Nc3 Rxf4 {Accuracy: White = 36%, Black = 78%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.21"]
[Round "1.8"]
[White "Gajewski, Grzegorz"]
[Black "Janik, Igor"]
[Result "1-0"]
[ECO "D26"]
[WhiteElo "2618"]
[BlackElo "2467"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,105,19,28,7,22,24,29,25,16,12,30,6,6,7,34,38,29,29,19,22,65,56,49,55,51,64,56,29,28,17,27,19,17,12,127,128,140,139,462,456,452,448,471,493,493,300,281,64,549,549,528,491,635,727,480,483,473,480,480,476,426,381,388,378,29965,29964,29969,29971,29971,29972,29967,29967,29975,29976,29976,29977,29977,29978,29978,29979,29979,29980,29980,29981,29979,29981]} 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 a6 6. O-O b5 7. Be2 Bb7 8. b3 Nbd7 9. Bb2 c5 10. a4 b4 11. Nbd2 Be7 12. Nc4 {D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4.} O-O 13. Nfe5 {13.Rc1 is the modern continuation.} cxd4 14. Bxd4 {White has an edge.} Nxe5 15. Bxe5 Nd5 {[#]} 16. Rc1 $146 ({Predecessor:} 16. Bf3 Rc8 17. Qd2 f6 18. Bb2 Bc5 {½-½ (18) El Debs,F (2544)-Bachmann,A (2633) Niteroi 2019}) 16... Bf6 17. Bxf6 gxf6 18. Bf3 $1 Rb8 19. Bxd5 Qxd5 {[%csl Gb7][%cal Rd5g2]} 20. Qg4+ Kh8 21. f3 $1 Rbd8 22. Qf4 Qg5 23. Qxg5 fxg5 24. Na5 Ba8 25. Rfd1 Kg7 26. Kf2 {next Rxd8 is good for White.} f5 27. Rc7+ Kg6 (27... Kf6 $1 $11 28. Rxd8 Rxd8) 28. Rxd8 $1 $16 {White stays focused until the end.} Rxd8 {[%mdl 4096] Endgame KRB-KRN} 29. Nc4 {And now Ne5+ would win.} Rd1 $2 {[%mdl 8192]} (29... Kf6 $16 {is tougher.}) 30. Ne5+ $18 Kh6 31. Rc8 $1 Bd5 32. Rg8 $1 Kh5 ({Inferior is} 32... Bxb3 33. Nf7+ Kh5 34. Rxg5+ Kh4 35. g3+ Kh3 36. Rh5#) 33. Kg3 Bxb3 {[#] White should prevent ...Rd5.} 34. h4 $1 {[%mdl 512] [#]} f4+ $1 {[%mdl 8704]} (34... gxh4+ 35. Kf4) 35. exf4 gxf4+ 36. Kxf4 {Kg3 would kill now.} Rd4+ {[#]} 37. Kg3 $1 Rxh4 38. Ng4 {White threatens Nf6+ and mate.} e5 39. Nf6+ Kh6 40. Kxh4 {[%cal Rf6g4]} Bxg8 41. Nxg8+ {KN-KP} Kg7 42. Ne7 Kf7 $2 (42... b3 $18 43. Nd5 Kf7) 43. Nc6 $1 {[%csl LRb4,LRe5] White mates.} b3 44. Nxe5+ {KN-K3P} Ke6 {[#]} 45. Nc4 $1 Kd5 46. Na3 b2 47. f4 Kc5 48. f5 Kb4 49. Nb1 Kb3 50. f6 Kc2 51. Na3+ Kb3 52. f7 Kxa3 53. f8=Q+ {Accuracy: White = 90%, Black = 69%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.23"]
[Round "2.1"]
[White "Tomczak, Jacek"]
[Black "Sadzikowski, Daniel"]
[Result "1/2-1/2"]
[ECO "C91"]
[WhiteElo "2563"]
[BlackElo "2374"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,81,10,16,22,1,0,6,-3,18,27,0,0,0,11,0,0,0,0,0,0,0,0,0,0,0,0,0,12,0,65,57,64,79,63,68,55,67,71,64,36,53,89,81,88,82,108,77,99,94,108,38,35,31,25,13,2,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 Bg4 10. Be3 $1 {10.Be3 is better than 10.d5.} Bh5 11. Nbd2 exd4 {C91: Closed Ruy Lopez: 7...d6 8 c3 0-0 9 d4.} 12. cxd4 Na5 13. d5 c5 14. dxc6 {[#]} Rc8 $146 ({Predecessor:} 14... Nxc6 15. Nf1 Ne5 16. Ng3 Bg4 17. Qe2 a5 18. a3 g6 19. Red1 Nfd7 20. h3 Nxf3+ 21. gxf3 Bxh3 {½-½ (44) Mendl,M (2538)-Sasikiran,K (2548) ICCF email 2018}) 15. Rc1 Nxc6 16. Nf1 {[%cal Bd2f1,Bf1g3,Bg3f5,Bf5d6][%mdl 32]} Bg6 17. Nh4 Bxe4 18. Ng3 d5 19. Nhf5 Bb4 {...Bxf5 is the strong threat.} 20. Bd2 Bxd2 21. Qxd2 Bxf5 22. Nxf5 Kh8 $1 23. Qf4 Re8 24. Red1 $40 {[%mdl 128] And now Nd6 would win. White mounts an attack.} Re4 (24... Re6 $11) 25. Nd6 $14 Rxf4 26. Nxf7+ {[%mdl 64] [#] Double Attack} Kg8 27. Nxd8 Rxd8 28. Rxc6 a5 29. a3 a4 30. Ba2 b4 31. g3 Re4 {[#]} 32. Kf1 $1 Kf8 33. Rc5 bxa3 34. bxa3 Rb8 35. Rc2 ({Much weaker is} 35. Bxd5 $6 Re5 $11) (35. Ra5 $16) 35... Rb5 36. Rcd2 {[%cal Ra2d5]} Re5 37. Rd4 Rb2 {The position is equal.} 38. R1d2 Rxd2 39. Rxd2 Re7 40. Rd4 Rb7 41. Rd2 {Accuracy: White = 86%, Black = 89%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.23"]
[Round "2.1"]
[White "Piorun, Kacper"]
[Black "Krasenkow, Michal"]
[Result "1/2-1/2"]
[ECO "C80"]
[WhiteElo "2539"]
[BlackElo "2521"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,81,-2,0,0,2,0,0,0,0,-11,0,-16,-5,-24,-24,-24,-23,-24,-24,-24,-24,-24,-24,-24,-23,-25,-20,-20,-3,-2,0,0,0,0,0,0,0,0,0,0,0,0,12,12,20,20,20,20,164,161,1023,21,12,24,41,27,20,0,0,0,8,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. Nxe5 Nxe5 9. dxe5 c6 10. c3 Bc5 11. Nd2 {C80: Open Ruy Lopez: Sidelines and 9 Nbd2.} Nxd2 12. Bxd2 Bf5 13. Qf3 Qd7 14. Be3 {[#]} Be7 $146 ({Predecessor:} 14... Bxe3 15. Qxe3 O-O 16. Rfe1 Rab8 17. f3 Rfe8 18. Qc5 Re6 19. Re3 Qe7 20. Qxe7 Rxe7 {½-½ (51) Petrosian,T-Teschner,R Oberhausen 1961}) 15. a4 O-O 16. Qe2 Qe6 17. f4 f6 18. axb5 axb5 19. Bd4 fxe5 20. Qxe5 Qxe5 21. Bxe5 Bd3 22. Rxa8 Rxa8 23. Rc1 Rf8 24. g3 g5 25. Kf2 gxf4 26. gxf4 Bc5+ 27. Kf3 Be4+ 28. Ke2 Rf5 29. Bc2 $1 Rh5 30. Bxe4 Rxh2+ 31. Kf3 {And now Bf5 would win.} Rf2+ 32. Kg4 dxe4 $11 {[%mdl 4096] Endgame KRB-KRB} 33. b4 Bb6 {[#]} (33... Bf8 $11) 34. Kf5 $1 $18 {[%mdl 1024] White has strong compensation.} e3 $2 {[#]} (34... Ra2) 35. Rg1+ $2 (35. Ke6 $1 $18 {Rg1+ would kill now.} h5 36. Rg1+ Kh7 37. Rg7+ Kh6 38. Rg8) 35... Kf7 $11 36. Rg7+ Kf8 {Hoping for ...e2.} 37. Ke6 Rh2 $1 38. Rf7+ {The position is equal.} Ke8 {aiming for ...e2.} 39. Rg7 {[%cal Rg7g8]} Kf8 {Strongly threatening ...e2.} 40. Rf7+ Ke8 {White must now prevent ...e2.} 41. Rg7 {Accuracy: White = 90%, Black = 81%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.23"]
[Round "2.1"]
[White "Heberla, Bartlomiej"]
[Black "Teclaf, Pawel"]
[Result "1-0"]
[ECO "A50"]
[WhiteElo "2527"]
[BlackElo "2360"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,71,57,56,59,63,54,65,72,43,80,87,83,75,174,179,176,172,312,292,292,271,260,165,157,163,147,110,101,96,163,156,241,224,219,228,243,241,357,357,365,364,353,358,337,310,704,704,666,596,638,645,762,715,29995,2456,2108,1990,1006,927,29965,29972]} 1. d4 Nf6 2. c4 b6 3. Nc3 Bb7 4. Nf3 e6 5. a3 g6 6. Qc2 Bxf3 7. exf3 Nc6 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7 .} 8. Be3 Bg7 9. O-O-O Ne7 {White is slightly better.} 10. g4 d5 11. h4 dxc4 {[#]} 12. Bxc4 $146 ({Predecessor:} 12. h5 Nfd5 13. Bxc4 Nxc3 14. Qxc3 c6 15. h6 Bf6 16. g5 Nd5 17. Bxd5 cxd5 18. Qc6+ {1-0 (42) Moiseenko,A (2642)-Rozentalis,E (2540) Netanya 2019}) 12... h5 {[#]} (12... Qd7 $16) 13. d5 $1 $18 {[%cal Rd5e6][%mdl 64] Decoy} Nfxd5 14. Nxd5 Nxd5 (14... exd5 $142 15. Bxd5 Nxd5 16. Qc6+ Kf8) 15. Bxd5 exd5 16. Qc6+ Kf8 17. Bg5 (17. Rxd5 Qe8 $14) (17. Qxd5 Qxd5 18. Rxd5 Re8 $11) 17... Qe8 18. Qxd5 c6 19. Qd6+ Kg8 20. Rhe1 $36 {[%mdl 2048] White is on the roll.} Qf8 (20... Qb8 $16) 21. Re7 hxg4 (21... c5 $16 {was necessary.} 22. Kb1 Rh7) 22. fxg4 Bh6 23. Rde1 Rd8 24. Qf6 (24. Qxc6 Bxg5+ 25. hxg5 Rc8 $16) 24... Rh7 (24... Rc8 {keeps fighting.} 25. Rxa7 Bxg5+ 26. hxg5 (26. Qxg5 Qh6 $16) 26... Rh3) 25. Bxh6 (25. Qxc6 Rc8 $14) 25... Qxh6+ 26. g5 Qf8 27. Kb1 ({And not} 27. Qxc6 Rc8 $11) ({Weaker is} 27. Rxa7 Rd6 $16) 27... Rc8 28. R1e4 ({Less strong is} 28. Rxa7 Rxh4 29. Ree7 Rh7 $16) 28... Rg7 $2 (28... b5 29. Rxa7 Qd8 30. Qxd8+ Rxd8) 29. f4 c5 30. Rd7 c4 31. Red4 Qc5 32. h5 {[#] Hoping for h6.} Rc6 33. Qd8+ (33. Rd8+ $142 Qf8 34. Rxf8+ Kh7 35. Rdd8 Rg8 36. Rxf7+ {[%mdl 64] Double Attack} Rg7 37. Rxg7#) 33... Kh7 34. hxg6+ Rcxg6 35. R7d5 Qc6 36. f5 {Accuracy: White = 75%, Black = 44%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.23"]
[Round "2.1"]
[White "Gajewski, Grzegorz"]
[Black "Dziuba, Marcin"]
[Result "1/2-1/2"]
[ECO "D20"]
[WhiteElo "2515"]
[BlackElo "2486"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,81,29,21,23,29,31,37,44,37,33,44,51,41,56,47,26,26,29,27,17,48,56,49,50,53,45,46,27,51,35,19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 exd4 5. Bxc4 Nc6 6. O-O Be6 7. Bb5 Bc5 8. b4 {D20: Queen's Gambit Accepted: 3 e3 and 3 e4.} Bb6 $1 9. a4 {Hoping for a5.} a6 10. Bxc6+ $1 {White is slightly better.} bxc6 11. Nbd2 Nf6 12. Ne5 Qd6 13. Nd3 {And now e5 would win.} Nd7 14. f4 {Black must now prevent a5.} f5 15. exf5 Bxf5 16. Re1+ {[#]} Kd8 $146 ({Predecessor:} 16... Kf8 17. Nc4 Qd5 18. Nxb6 cxb6 19. Bb2 h5 20. a5 b5 21. Qd2 Rh6 22. Rad1 Rd6 {½-½ (37) Mikhalchuk,V (2464)-Dobrica,D (2401) ICCF email 2017}) 17. Nc4 Qd5 18. Nxb6 cxb6 19. a5 b5 20. Bb2 Re8 21. Rxe8+ Kxe8 22. Qh5+ {The position is equal.} Kf8 {[#]} 23. Ne5 $1 {[%mdl 512]} Be4 (23... Nxe5 24. Qxf5+) 24. Nxd7+ Qxd7 25. Re1 Bf5 26. g4 Bxg4 27. Qxh7 {aiming for Qh8+.} Re8 28. Qh8+ {[#]} Kf7 $1 29. Qxe8+ Qxe8 30. Rxe8 Kxe8 31. Bxd4 $11 {[%mdl 4096] Endgame KB-KB} g6 32. Kf2 Kf7 33. Kg3 Bf5 34. Kh4 Ke6 35. Kg5 Bb1 36. Bc5 Be4 37. Kh6 Kf7 38. h4 Bb1 39. Bd4 Be4 40. Kg5 Ke6 41. Bc5 {Accuracy: White = 100%, Black = 96%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.2"]
[White "Krasenkow, Michal"]
[Black "Piorun, Kacper"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2521"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "178"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,178,17,17,17,20,20,20,20,20,15,12,16,17,28,0,0,0,4,0,16,0,-7,-15,-16,-29,-8,-21,-14,-39,-21,-47,-5,-14,0,-11,0,-7,0,-4,0,0,18,17,16,12,41,29,13,0,0,0,0,-74,-69,-122,-86,-127,-120,-104,-110,-92,-79,-78,-73,-56,-52,-62,-65,-72,-31,-31,0,0,0,-10,-9,-13,-13,-28,-28,-28,-28,-59,-60,-170,-172,-210,-214,-223,-182,-1279,-1270,-1249,-1273,-1106,-1075,-916,-916,-1871,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-416,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,8,8,8]} 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. Qa4+ Nc6 8. e3 O-O {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 9. Rc1 Qg6 10. Qc2 Qxc2 11. Rxc2 Rd8 12. a3 Bf8 13. Nb5 Rd7 14. cxd5 exd5 15. Bd3 a6 16. Nc3 Rd8 17. Na4 Bd6 {[#]} 18. h3 $146 ({Predecessor:} 18. Ke2 g5 19. h3 Re8 20. b4 f5 21. Kd2 f4 22. Nc5 fxe3+ 23. fxe3 Ne7 24. e4 {½-½ (57) Asgharzadeh,M (2257)-Asgarizadeh,A (2416) Hamedan 2018}) 18... Ne7 19. g4 g6 20. Ne5 Kg7 21. Be2 Rb8 22. b4 f6 23. Nd3 Kf7 24. Bf3 Rh8 25. Nc3 c6 26. Kd2 Be6 27. a4 Nc8 {[%cal Be7c8,Bc8b6,Bb6d7][%mdl 32]} 28. Nc5 Nb6 29. Be2 Ke7 30. Ra1 Bf7 31. b5 (31. a5 {is interesting.} Nd7 32. h4 Rhg8 33. Rg1 f5 34. gxf5 gxf5 35. Rxg8 Bxg8 36. Rc1) 31... Bxc5 32. dxc5 Nd7 33. bxc6 (33. Rb1 $11 {keeps the balance.}) 33... bxc6 $17 34. Bxa6 (34. a5 $15) 34... Nxc5 {Strongly threatening ...Nb3+.} 35. Nxd5+ Kd6 36. Rxc5 Kxc5 37. Nxf6 {Hoping for Nd7+.} Rhd8+ 38. Ke1 Rb4 {[%mdl 1024] Black has strong compensation.} 39. a5 Kd6 40. f3 Kc7 41. Ne4 Rb2 42. Be2 Ra2 43. Rxa2 Bxa2 $11 {[%mdl 4096] Endgame KRB-KBN} 44. Nc3 Be6 45. h4 c5 46. f4 Ra8 47. a6 c4 48. e4 Rxa6 49. Kd2 ({White must play} 49. f5 $15 Bg8 50. Bf3) 49... Kd6 $19 50. e5+ Kc5 51. Bf3 Ra3 {aiming for ...Kb4.} 52. Kc2 $2 (52. Be4) 52... Kb4 53. Nd5+ {[#]} Bxd5 $1 54. Bxd5 {KR-KB} Rc3+ 55. Kb2 Re3 56. Bf7 {[#]} c3+ (56... g5 $142 $1 {[%mdl 512]} 57. fxg5 hxg5 58. hxg5 Rxe5) 57. Kc2 Re2+ 58. Kc1 {[#]} g5 $1 {[%mdl 512]} 59. hxg5 (59. fxg5 Re1+) 59... hxg5 60. fxg5 Rxe5 61. Bg6 {Now Bf5 and White clings on.} Rxg5 62. Bf5 Rg8 63. Kc2 Rd8 64. Bh7 Rd2+ 65. Kc1 Rg2 66. Bf5 Kc4 67. Kb1 Re2 {( -> ...Kb3)} 68. Bh7 Re8 69. Kc2 Rh8 70. Bf5 Rh2+ 71. Kc1 Kd4 72. Kd1 Rg2 73. Kc1 Ke3 74. Kd1 Ra2 75. Kc1 Kd4 76. Bh7 Re2 77. Bf5 Rg2 78. Kd1 c2+ $2 (78... Kc4 $19 {...Kb3 is the strong threat.} 79. Kc1 Kb4) 79. Bxc2 $11 Rxg4 80. Bf5 Rg5 81. Bh7 Ke3 82. Kc2 Rc5+ (82... Rg7 $5 83. Bf5 $8 Rc7+ 84. Kb3 Kd4 $11) 83. Kb3 Kd4 84. Bg6 Rc7 85. Bf5 Rg7 86. Kc2 Rg5 87. Bh7 Rg2+ 88. Kb3 Rc2 89. Kxc2 Ke5 {And White is the lucky defender. Accuracy: White = 84%, Black = 88%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.2"]
[White "Dziuba, Marcin"]
[Black "Gajewski, Grzegorz"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "2486"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,110,0,0,19,22,18,14,39,35,26,17,25,24,13,0,0,-41,-49,-83,14,-64,0,0,6,0,0,0,0,0,0,0,0,0,0,0,45,39,39,39,42,42,43,43,31,35,38,39,39,39,39,39,41,31,33,33,43,43,50,22,22,23,27,22,46,29,22,12,26,0,30,6,6,6,6,6,6,0,8,5,5,5,10,10,10,10,10,10,11,11,11,11,11,11,12,12,127]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Bb7 9. O-O Re8 {E52: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5 6 Bd3 b6.} 10. Ne5 Nbd7 11. f4 Bxc3 12. Bxc3 {[#]} Ne4 $146 ({Predecessor:} 12... a6 13. Rc1 c5 14. Be1 Ne4 15. Qh5 Rf8 16. Nxd7 Qxd7 17. Bxe4 dxe4 18. dxc5 bxc5 19. Rxc5 Rac8 20. Rxc8 Rxc8 21. Bc3 Kh8 22. Rd1 Qe7 23. Qg4 Qf8 24. Rd7 Ba8 {1-0 (24) Abeln,M (2288)-Strasser,J (1984) Bad Wiessee 2003}) 13. Qh5 Qe7 14. Bxe4 dxe4 15. Nxd7 Qxd7 16. d5 f6 17. d6 Qf7 (17... Qxd6 $17 18. Rfd1 Qe6) 18. Qh4 (18. Qxf7+ $11 Kxf7 19. dxc7 (19. d7 Red8 $17)) 18... Rad8 ({Black should play} 18... cxd6 $15 19. a4 Rac8) 19. dxc7 $11 Qxc7 20. Rac1 {[#] Bxf6 is the strong threat.} Qf7 21. g4 Ba6 22. Rf2 Rd3 23. Qg3 Red8 24. f5 h6 25. h4 Qd5 ({Reject} 25... Qxa2 $6 26. g5 $16) 26. g5 Rd1+ 27. Rxd1 Qxd1+ 28. Kg2 Be2 $1 ({Don't blunder} 28... fxg5 $2 29. hxg5 h5 30. f6 $18) 29. gxf6 {[%csl Gc3,Gf6][%cal Rg3g7]} Bf3+ $1 30. Kh3 $1 {[%csl Gc3,Gf6][%cal Rg3g7]} Qh1+ 31. Qh2 Qxh2+ 32. Kxh2 gxf6 33. Bxf6 $14 {[%mdl 4096] Endgame KRB-KRB} Rf8 34. Bd4 Rxf5 35. Rc2 Rf7 36. Rc6 Kh7 37. Be5 h5 38. Kg3 Bg4 39. Bf4 Rd7 40. a4 Bd1 41. Rc4 Bf3 42. Rc6 Bd1 43. b4 Rg7+ {The position is equal.} 44. Kf2 Rg6 45. Rc7+ Rg7 46. Rc6 Rg6 47. Rc4 Bxa4 48. Rxe4 Rg2+ 49. Kxg2 Bc6 50. Kf3 Kg6 $1 51. b5 Bd5 52. Bb8 {aiming for Kf4.} Kf5 {[%mdl 64] [#] Pin} 53. Bxa7 Bxe4+ 54. Ke2 Bc2 55. Bxb6 Ke5 {Accuracy: White = 88%, Black = 85%.} (55... Ke4 $11) 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.2"]
[White "Sadzikowski, Daniel"]
[Black "Tomczak, Jacek"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "2374"]
[BlackElo "2563"]
[Annotator "TA"]
[PlyCount "138"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,138,35,32,26,32,38,62,31,31,28,31,31,25,24,38,15,0,3,11,0,0,0,0,0,0,0,0,0,31,-8,0,0,-7,-20,-10,-26,14,7,22,0,0,0,0,0,0,0,0,-12,-5,-8,-6,-63,-51,-92,-91,-97,-100,-93,-93,-93,-100,-88,-91,-90,0,-93,-105,-109,-137,-135,-131,-316,-51,-54,-19,-84,-75,-70,-62,-95,-59,-67,-9,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nc3 a6 3. Nge2 b5 4. d4 cxd4 5. Nxd4 Bb7 6. Bg5 {B28: Sicilian: 2 Nf3 a6 (O'Kelly Variation).} h6 7. Bh4 {[#]} Qb6 $146 ({Predecessor:} 7... Nc6 8. a4 b4 9. Nd5 Nf6 10. Bxf6 gxf6 11. Nxc6 Bxc6 12. Qd4 Bxd5 13. exd5 e5 {0-1 (44) Escobar Forero,A (2487)-Palit,S (2393) Barbera del Valles 2012}) 8. Nd5 {White is slightly better.} Bxd5 $1 9. exd5 {next a4 is good for White.} g5 10. Bg3 Bg7 $1 11. c3 {Black must now prevent Nf5.} Bxd4 $1 12. Qxd4 (12. cxd4 {looks sharper.} d6 13. a4 Qa5+ 14. Qd2 Qxd2+ 15. Kxd2 bxa4 16. h4) 12... Qxd4 13. cxd4 d6 $1 14. a4 bxa4 $1 15. h4 g4 $1 16. Rxa4 Nf6 17. Bb5+ {[%mdl 64] Pin} Kf8 18. O-O Kg7 19. Rc1 (19. Re1 $5 {[%cal Re1e7]} Nxd5 20. Bc4 $14) 19... Ra7 20. Be2 Rb7 21. Rc2 h5 22. f3 gxf3 23. Bxf3 Rb5 24. Be1 (24. Re2 {with more complications.} Nxd5 25. Bxd5 Rxd5 26. Rxe7 Rc8 27. Kh2) 24... Nxd5 25. Ra5 Rxa5 26. Bxa5 e6 27. Kf2 Kf6 28. Bxd5 exd5 $11 {[%mdl 4096] Endgame KRB-KRN} 29. Rc7 Ke6 30. b4 (30. Rc3 $11) 30... Rg8 31. Kf3 Nd7 32. Rc6 Nf6 $1 33. Rxa6 {Threatening b5.} Ne4 34. b5 Rg3+ 35. Kf4 Rxg2 36. b6 Rf2+ 37. Ke3 {Hoping for b7.} Rb2 38. Ra7 {[#]} Rb3+ $1 39. Kf4 f6 {( -> ...Nf2)} 40. Rc7 $2 {[#]} (40. Ra8 $17) 40... Nf2 $2 (40... Ng3 $1 $19 {[%cal Rg3e2]} 41. Rc2 Nf5) 41. Rc3 $15 Rb5 42. Re3+ (42. Rc8 $1 $11 {keeps the balance.}) 42... Ne4 43. Ra3 Rb2 44. Ra4 f5 45. Ke3 {Black should prevent Rb4.} Rb3+ ({Black should play} 45... Nf2 $1 $15) 46. Kf4 $11 {The position is equal.} Nf2 {[%cal Rf2h3]} 47. Kg5 Nd3 {Threatens to win with ...f4.} 48. Ra1 f4 49. Rf1 {And now Rf3 would win.} Rb5 50. Bd2 Rb2 51. Bxf4 Nxf4 52. Rxf4 Rxb6 53. Kxh5 {KR-KR} Rb8 54. Kg6 Rg8+ 55. Kh7 Rg1 56. h5 Rg2 57. h6 Rg1 58. Kh8 Rg5 59. Rf8 {Rg8 is the strong threat.} Rg6 60. h7 {aiming for Rg8.} Rg4 61. Rg8 Rxd4 62. Kg7 Rh4 63. h8=Q (63. Re8+ {is interesting.} Kf5 64. Rf8+ Ke4 65. Rf6 Rxh7+ 66. Kxh7 d4 67. Re6+) 63... Rxh8 64. Rxh8 {KR-KPP} (64. Kxh8 {seems wilder.} Ke5 65. Re8+ Kf4 66. Rb8 Ke4 67. Rb1) 64... Kf5 65. Kh6 d4 66. Rf8+ Ke4 67. Re8+ (67. Kg5 $5 {[%cal Rg5g4]} d3 68. Kh5 $11) 67... Kf3 68. Rd8 d3 69. Rxd6 Ke2 {Accuracy: White = 83%, Black = 85%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.2"]
[White "Teclaf, Pawel"]
[Black "Heberla, Bartlomiej"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2360"]
[BlackElo "2527"]
[Annotator "TA"]
[PlyCount "156"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,156,16,30,42,35,24,25,47,30,14,18,26,38,58,53,42,44,59,39,42,39,50,45,52,27,37,0,26,0,25,15,22,13,18,6,0,0,0,0,6,0,0,0,42,38,121,114,119,114,116,116,161,103,99,92,114,102,122,127,114,114,106,107,116,74,85,45,116,85,85,69,85,0,66,6,69,30,30,25,26,27,49,49,62,50,51,51,61,61,64,64,63,66,65,57,57,57,57,57,59,59,60,57,59,59,81,0,60,68,54,62,68,68,64,42,317,317,29958,29957,12850,29942,12352,1768,639,0,9254,239,239,239,242,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Nc3 c5 5. cxd5 exd5 6. d4 Nc6 7. Bb5 Bd6 8. dxc5 Bxc5 9. O-O O-O 10. b3 Bg4 11. Bb2 Bd6 {D32: Tarrasch Defence: Sidelines and lines without g3.} 12. Rc1 Rc8 13. Be2 Bb8 {White has an edge.} 14. Nd4 Qd6 {[%csl Gb8][%cal Rd6h2]} 15. g3 Bh3 16. Re1 {[#]} Qe7 $146 ({Predecessor:} 16... Rfd8 17. Nxc6 bxc6 18. Na4 Bc7 19. Qd4 Ba5 20. Red1 Qe7 21. a3 Rd6 22. b4 Bd8 {½-½ (35) Matlakov,M (2683)-Jakovenko,D (2752) Porto Carras 2018}) 17. Nxc6 bxc6 18. Qd4 Bd6 19. Bf3 Ba3 20. Na4 Bxb2 21. Qxb2 c5 22. Qc2 {[%cal Ra4c5]} c4 23. Qb2 cxb3 (23... Rfd8 {is more complex.} 24. Red1 Bg4 25. Be2 Bxe2 26. Qxe2 cxb3 27. Rxc8 Rxc8 28. axb3 Qe4) 24. Qxb3 (24. Nc3 {with more complications.} Qd7 25. Qxb3 Be6 26. Red1 d4 27. Qb1) 24... Be6 25. Nc3 {[%cal Rc3d5]} Rfd8 26. Qb2 Rb8 27. Qe2 d4 28. exd4 Rxd4 29. Nb5 Rd7 30. Bc6 Rdd8 31. Qe3 Qb4 32. Nc7 $36 {[%mdl 2048] White fights for an advantage.} ({Of course not} 32. Nxa7 Ng4 $15) 32... Qb6 (32... Bc4 $1 $14) 33. Nxe6 $16 Qxe3 34. Rxe3 fxe6 35. Rxe6 Rb2 36. Re7 (36. Ba4 $1 $18) 36... Rxa2 37. Bf3 {And now Rcc7 would win.} Ra3 38. Kg2 {aiming for Rcc7.} Kh8 39. Rcc7 Rg8 40. Rxa7 Rxa7 41. Rxa7 {[%mdl 4096] Endgame KRB-KRN} Rd8 42. g4 g5 43. h4 h6 (43... gxh4 $14 44. Rf7 Nd7) 44. Rf7 Rd6 45. Be2 Nd5 46. Bf3 (46. h5 $16) 46... Nf4+ ({Better is} 46... Nf6 $11) 47. Kh2 ({White should try} 47. Kg3 $14) 47... Rd2 (47... Kg8 $11 48. Rf5 Rd3) 48. hxg5 hxg5 49. Rf5 Rxf2+ 50. Kg3 Rb2 51. Rxg5 Ne6 52. Re5 Nf8 53. Be4 Kg7 54. g5 Kf7 55. Rf5+ Kg7 56. Ra5 Ne6 57. Ra7+ Kf8 58. g6 {Strongly threatening Rf7+.} Rb5 59. Rf7+ Kg8 60. Re7 Ng7 61. Kg4 Nh5 62. Bf5 {Intending Be6+ and mate.} Ng7 63. Be4 Nh5 $1 64. Rf7 Rb4 65. Kf3 {Hoping for Bd5.} Rb3+ 66. Kf2 $1 Rb8 67. Bf3 Ng7 $2 {[%mdl 8192]} (67... Rb5 $14) 68. Bd5 $18 {White wants to mate with Rb7+.} Kh8 $2 (68... Rb5 $18 69. Bc4 (69. Rf5+ Rxd5 70. Rxd5 Ne6 $14) 69... Rc5 70. Rf4+ Rxc4 71. Rxc4 Ne6) 69. Kf3 Rd8 70. Kg4 Re8 71. Rf6 (71. Ra7 $142 Re1 72. Kf3) 71... Rd8 72. Rf7 (72. Bb3 $142 Rb8 73. Bd5) 72... Re8 $1 73. Rf1 $2 (73. Ra7 Re5 74. Ra8+ Re8 75. Ra1) 73... Ne6 {[#]} 74. Kh5 $1 {Threatening mate with Rf7.} Rf8 {[#] Threatens to win with ...Ng7+.} 75. Rh1 $2 (75. Rf7 $1 $18 {[%cal Rf7h7]} Rxf7 76. gxf7) 75... Kg7 $11 {The position is equal.} 76. Kg4 Rf4+ 77. Kg3 Rf6 $1 78. Be4 Nf8 {Accuracy: White = 75%, Black = 74%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.3"]
[White "Tomczak, Jacek"]
[Black "Sadzikowski, Daniel"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2563"]
[BlackElo "2374"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,88,0,15,6,8,7,2,-5,0,-21,0,-3,0,-20,24,0,25,0,0,0,8,4,55,58,49,43,93,0,160,153,150,146,156,133,153,153,146,139,159,99,112,76,79,72,125,107,177,168,168,140,135,136,135,137,130,-157,-152,-157,-87,-455,-425,-435,-439,-438,-431,-390,-371,-12845,-12845,-29996,-29997,-29997,-29998,-29998,-29999]} 1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nc6 5. e5 d5 6. Bb5 Nd7 7. O-O Be7 8. Bxc6 bxc6 9. Nxd4 {C56: Two Knights: 4 d4 exd4 5 0-0 Nxe4.} Nb8 10. Qf3 O-O 11. Nc3 {The position is equal.} Re8 12. Bf4 Bd7 {[#]} 13. Rfe1 $146 ({Predecessor:} 13. h3 Na6 14. Nb3 Nc5 15. Nxc5 Bxc5 16. Rad1 Bb6 17. Na4 Bf5 18. Rd2 Qe7 19. b3 {0-1 (28) Heilmann,M (2497)-Barbalic,Z (1977) ICCF email 2017}) 13... Na6 14. Rad1 Nc5 15. Bc1 Qc8 16. h3 a5 17. Qg3 Bf8 (17... a4 {keeps more tension.} 18. f4 Nb7 19. Nf3 Bb4 20. Bd2 Ba5) 18. f4 Ra6 (18... a4 $11) 19. Qf3 $14 Ne6 {With the idea ...Nxd4.} 20. Nde2 Nc5 21. g4 {[#]} (21. Ng3 $16) 21... Ne4 $2 (21... h5 $1 $11 {[%mdl 512]}) 22. Nxe4 $16 dxe4 23. Qxe4 c5 24. f5 Bd6 25. Bf4 Bc6 26. Qe3 Rb6 27. Qg3 (27. Ng3 $142) 27... Bf8 28. b3 c4 29. Nd4 Bc5 (29... Bd5 $142) 30. Kh2 ({Reject} 30. bxc4 $6 Rb2 $11) 30... Ba8 (30... cxb3 $16 31. cxb3 (31. axb3 Ba8 $16) 31... Bd7) 31. e6 $18 {Strongly threatening exf7+.} ({Much less strong is} 31. bxc4 $6 Rb2 $16) 31... Bxd4 32. exf7+ Kxf7 {...c5 is the strong threat.} 33. Rxd4 cxb3 34. axb3 {And now Rxe8 would win.} Rb4 35. Be5 $2 {[%mdl 8192]} (35. c4 $16 {keeps the pressure on.}) 35... Rxd4 $1 $17 36. Bxd4 {[#] Threatens to win with Rxe8.} Qb7 $1 $40 {[%mdl 128] ( -> ...Re2+!). Black attacks with force.} 37. Rd1 $2 {[%mdl 8192] [#] White does not recover from this.} (37. Rg1 $17) 37... Rd8 $1 $19 {[%cal Rd8d4] White must now prevent ...Rxd4!} 38. Qf2 {[#]} c5 $1 {[%mdl 512]} 39. f6 (39. Bxc5 Rxd1) 39... cxd4 40. fxg7+ Kxg7 41. Rxd4 $2 (41. Kg3) 41... Rf8 42. Qd2 Qh1+ {Black mates.} 43. Kg3 Rf3+ 44. Kh4 Qxh3+ {Accuracy: White = 59%, Black = 81%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.3"]
[White "Piorun, Kacper"]
[Black "Krasenkow, Michal"]
[Result "1-0"]
[ECO "C28"]
[WhiteElo "2539"]
[BlackElo "2521"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,75,0,5,0,64,64,64,68,58,55,60,63,62,61,79,82,88,68,62,66,121,119,119,113,119,121,112,108,113,107,118,116,159,154,166,100,137,146,158,150,172,171,193,185,176,178,186,177,182,164,1133,1112,1148,1148,1125,1129,1460,1435,1361,1283,2687,2598,2301,1537,29969,29970,29980,29965]} 1. e4 e5 2. Bc4 Nf6 3. Nc3 Nc6 4. d3 Na5 5. Qf3 Bb4 6. Nge2 {C28: Vienna Game: 2...Nf6 3 Bc4 Nc6.} c6 (6... Nxc4 $11 7. dxc4 d6) 7. a3 $14 Bxc3+ 8. Nxc3 {White is slightly better.} Nxc4 9. dxc4 d6 10. b3 Be6 {[#]} 11. a4 $146 ({Predecessor:} 11. O-O Qe7 12. a4 Nd7 13. Ba3 a5 14. Qg3 f6 15. f4 Nc5 16. Rad1 Rd8 17. Bxc5 exf4 18. Qxf4 dxc5 19. Rxd8+ Qxd8 {1-0 (34) Sanchez,S (2385)-Romero Barreto,J (2217) Ocana 2017}) 11... O-O 12. Bg5 h6 13. Bh4 g5 14. Bg3 Ne8 (14... Kh7 $14) 15. O-O-O $16 Qe7 16. h4 g4 17. Qe3 Kh7 18. f4 gxf3 19. gxf3 (19. Qxf3 $6 Nf6 $11) 19... Rg8 20. f4 Nf6 21. f5 ({Of course not} 21. fxe5 $6 Ng4 $11) 21... Bd7 22. Rd3 (22. Kb2 $18) 22... Rg4 23. Rhd1 Rag8 {[#]} 24. Be1 $1 ({Wrong is} 24. Rxd6 $2 Rxg3 25. Qe1 Be8 $19) 24... d5 25. cxd5 cxd5 26. Nxd5 Nxd5 ({But not} 26... Qa3+ $2 {[#]} 27. Kb1 $1 $18 {[%mdl 512]}) 27. Rxd5 Bc6 28. Rd6 $40 {[%csl Gd6][%cal Re3h6][%mdl 128] Black is in trouble.} f6 29. Qxa7 {Rxc6! is the strong threat.} Qg7 $2 {[#]} (29... R8g7) 30. Rxc6 $1 $18 bxc6 31. Rd7 Rxe4 32. Bd2 Rd4 33. Rxg7+ Rxg7 34. Qb6 Rxh4 35. Qxc6 Rh2 36. Bb4 h5 37. Qxf6 h4 38. Bc3 {Accuracy: White = 94%, Black = 59%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.3"]
[White "Dziuba, Marcin"]
[Black "Gajewski, Grzegorz"]
[Result "0-1"]
[ECO "E46"]
[WhiteElo "2486"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,112,-4,-3,9,0,1,9,17,19,0,0,0,0,0,0,-6,-1,-8,-25,-18,-25,0,-3,18,6,2,16,45,10,62,58,68,48,98,79,529,538,1716,57,27,-132,0,-127,-130,-131,-123,-135,-141,-139,-122,-160,-167,-230,-150,-263,-168,-300,-295,-273,-230,-310,-310,-325,-316,-330,-320,-308,-320,-308,-313,-302,-275,-335,-339,-338,-336,-336,-331,-352,-325,-356,-347,-345,-297,-297,0,-319,-226,-312,-279,-367,-370,-417,-400,-591,-587,-572,-562,-1426,-1397,-1671,-1596,-1546,-1526]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 Re8 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} 7. Bd3 c5 8. O-O cxd4 {The position is equal.} 9. exd4 dxc4 10. Bxc4 {[#]} a6 $146 ({Predecessor:} 10... Nbd7 11. Qb3 Bd6 12. Rfe1 Nb6 13. Bb5 Bd7 14. a4 Bc6 15. Bxc6 bxc6 16. Bg5 Rb8 {0-1 (50) Zhai,M (2355)-Zhao,X (2510) Wuxi 2016}) 11. a3 Be7 12. Rc1 b5 13. Ba2 Bb7 14. Bg5 Nbd7 15. Re1 Nb6 16. Ne5 Nfd5 17. Bxe7 Qxe7 18. Ne4 Rad8 19. Qd2 h6 ({Black should try} 19... Nd7 $11) 20. Nc5 $14 Rc8 21. Bb1 Nf6 22. Rc3 Red8 $2 {[%mdl 8192]} (22... Nc4 $16 {is more resistant.} 23. Nxc4 bxc4) 23. Rg3 $18 {[#] Strongly threatening Qxh6.} Nh5 24. Qc2 $2 (24. Qxh6 $18 {White wants to mate with Qh7+.} Qf6 25. Qxh5 Rxc5 26. dxc5) 24... f5 $14 25. Ng6 $2 ({Better is} 25. Rc3 $11 Nf4 26. Ba2) 25... Qf7 (25... Qf6 $17 26. Rc3 Rxc5 27. dxc5 Qxg6) 26. Rc3 (26. Ba2 $11 {keeps the balance.} Be4 27. Bxe6 Qxe6 28. Nxe6 Rxc2 29. Nxd8 Nxg3 30. hxg3) 26... Rxc5 $1 $17 (26... Qxg6 27. Nxb7 Rxc3 28. Qxc3 $16) 27. dxc5 {Ne5 is the strong threat.} Qxg6 $40 {[%csl Gb7][%cal Rg6g2][%mdl 128] Black has strong attack.} 28. c6 Bc8 29. Ba2 Nf4 {[%csl Gf4][%cal Rg6g2]} 30. Rg3 Qf6 31. c7 (31. Rc3 $142) 31... Rd6 32. h4 (32. Rc3 $17) 32... Kf8 33. Rd1 (33. Rge3 {might work better.} Nfd5 34. Bxd5 Nxd5 35. Qc5) 33... Rxd1+ $19 34. Qxd1 Nbd5 (34... Qxb2 35. Qd6+ Ke8 36. Qxf4 $18) 35. Bxd5 Nxd5 ({Weaker is} 35... exd5 36. Qd2 $17) 36. Qc2 Qxh4 37. Qc6 Qe7 38. Rd3 Qd7 39. Qc5+ Kf7 40. Rd2 Bb7 41. Rc2 {[#]} Ne7 $1 42. Kh2 Qd5 43. Qxd5 exd5 ({And not} 43... Bxd5 44. c8=Q $16) 44. Re2 Ke8 45. Kg3 Kd7 46. Kf4 Nc6 47. Rd2 Ne7 $2 ({Much less strong is} 47... Kxc7 48. Kxf5 Kd6 49. Kg6 $19) (47... Kd6 $19 {White must now prevent ...Ne7.} 48. Kxf5 Ne7+ 49. Kf4 Kxc7) 48. Rc2 $2 {[%mdl 8192]} (48. Re2 $1 $11 {and White stays safe.} Kd6 49. Kg3) 48... Bc6 49. Ke5 Kxc7 50. Ke6 Nc8 51. Kxf5 Kd6 52. Kg6 (52. Rd2 $142 Ne7+ 53. Kf4) 52... d4 {And now ...Be4+ would win.Black is clearly winning.} 53. Kxg7 Nb6 54. g4 Nc4 55. b3 d3 56. Rc3 Nb2 {What a bad dream for White. Accuracy: White = 49%, Black = 66%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.4"]
[White "Krasenkow, Michal"]
[Black "Piorun, Kacper"]
[Result "0-1"]
[ECO "D38"]
[WhiteElo "2521"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,78,16,14,14,15,15,15,7,7,7,14,-6,33,17,38,0,0,-21,-8,0,6,10,0,0,0,0,10,-25,-17,-41,-27,-83,-96,-98,-87,-85,-102,-91,-99,-105,-58,-69,-51,-114,-28,-80,-64,-92,-56,-58,-53,-54,-49,-275,-272,-287,-133,-291,-286,-437,-319,-292,-306,-309,-258,-408,-398,-515,-515]} 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 Bb4 5. Qa4+ Nc6 6. e3 O-O 7. Qc2 {is now more promising than 7.Bd2. Played by Magnus Carlsen in July 2020. D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} Re8 8. Bd2 Bf8 9. Be2 {The position is equal.} Nb4 10. Qb1 c5 11. a3 Nc6 12. dxc5 Bxc5 {[#]} 13. b4 $146 ({Predecessor:} 13. O-O dxc4 14. Bxc4 b6 15. Ne4 Nxe4 16. Qxe4 Bb7 17. Bc3 Bf8 18. Rfd1 Qe7 19. Bd3 {½-½ (32) Postny,E (2652)-Gajewski,G (2643) Germany 2014}) 13... Bd6 14. O-O a6 15. Rd1 $1 Qe7 16. Be1 {[%cal Rc4d5]} dxc4 17. Bxc4 b5 18. Be2 Bb7 19. Ra2 Ne5 20. Nxe5 Bxe5 21. f4 (21. Rc2 $11) 21... Bc7 22. Bh4 Bb6 23. Qc1 Qc7 {And now ...Rac8 would win.} 24. Bxf6 gxf6 25. Kh1 Red8 (25... f5 {with more complications.} 26. Rc2 Rac8 27. Bd3 Qe7 28. Be2 Rcd8) 26. Rc2 Rxd1+ 27. Qxd1 ({Better is} 27. Nxd1 $15 Qe7 28. Bf3) 27... Qe7 (27... Rd8 $17 28. Qe1 Kf8) 28. Qe1 (28. Rd2 $11 {keeps the balance.} Qc7 29. Rd3) 28... f5 $36 {[%mdl 2048] Black has some pressure.} 29. Bf3 Bxf3 30. gxf3 Rd8 31. Rg2+ Kf8 {aiming for ...Rd3.} 32. Ne2 $2 ({But not} 32. Qg3 $2 Qf6 $19) (32. Rd2 $1 $15) 32... Qc7 $19 ({Much less strong is} 32... Bxe3 33. Qc3 $17) 33. Ng3 Qd6 (33... Qc6 $19 {has better winning chances.} 34. Rf2 Rd3) 34. Nf1 $2 {[#] This costs White the game.} (34. Re2 $17 {was called for.}) 34... Qd1 $1 {[%mdl 512]} 35. Qf2 {[#]} (35. Re2 {was the only chance.}) 35... Bxe3 $1 {[%mdl 576] Deflection} 36. Qxe3 {Strongly threatening Qc5+.} Qxf1+ 37. Rg1 Qd3 38. Qf2 (38. Qc5+ $142 Qd6 39. Qc1) 38... Rc8 39. h4 Rc3 {Accuracy: White = 61%, Black = 71%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.4"]
[White "Gajewski, Grzegorz"]
[Black "Dziuba, Marcin"]
[Result "1-0"]
[ECO "B31"]
[WhiteElo "2515"]
[BlackElo "2486"]
[Annotator "TA"]
[PlyCount "43"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,43,28,10,25,18,18,20,31,25,46,42,56,60,54,-2,-14,-24,0,0,62,56,62,64,71,76,152,118,471,471,473,462,779,761,1146,1107]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. d3 Bg7 6. Nc3 Qc7 {B31: Sicilian: 2...Nc6 3 Bb5 g6.} 7. Be3 b6 8. h3 e5 {[#] The position is equal.} 9. a3 $146 ({Predecessor:} 9. O-O Nf6 10. Qd2 Nh5 11. Bh6 f6 12. Ne2 g5 13. Bxg7 Qxg7 14. Nh2 Nf4 15. Rfe1 Be6 16. Nf1 {0-1 (35) Quesada Perez,Y (2572)-Le,Q (2713) Philadelphia 2019}) 9... f5 10. exf5 gxf5 11. Qe2 Ne7 12. g4 ({White should try} 12. Bg5 $14) 12... fxg4 $11 13. Ng5 h5 14. O-O-O Ng6 (14... Nf5 $11) 15. Nce4 Qe7 16. Rdg1 Bd7 17. hxg4 h4 (17... hxg4 $142 18. Rxh8+ Bxh8) 18. Nf3 Bh6 $2 {[%mdl 8192] [#] This costs Black the game.} (18... O-O-O $16 {is a better chance.}) 19. Bxh6 $18 {White is clearly winning.} Rxh6 20. g5 Nf4 (20... Rh8 $142 21. Nf6+ Kf7) 21. Qe3 Nd5 22. gxh6 {Accuracy: White = 84%, Black = 44%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.24"]
[Round "2.4"]
[White "Sadzikowski, Daniel"]
[Black "Tomczak, Jacek"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "2374"]
[BlackElo "2563"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,91,20,30,21,45,28,74,64,74,32,24,37,72,51,66,68,140,33,210,43,35,19,55,58,79,71,90,86,89,38,65,46,68,36,33,0,94,20,4,0,57,19,14,0,16,0,52,35,95,91,89,86,197,66,172,162,238,47,211,0,202,0,32,0,11,-13,-16,-17,0,-22,173,-43,0,-124,-52,-37,705,711,878,586,29982,29983,29996,29997]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 a6 5. Bxd7+ Bxd7 6. dxc5 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} dxc5 7. O-O g6 {[#]} 8. Nc3 $146 {White is better.} ({Predecessor:} 8. Be3 Bc6 9. Qe2 Bxe4 10. Nc3 Bxf3 11. Qxf3 Nf6 12. Qxb7 Qc8 13. Qb3 Bg7 14. Qa4+ {1-0 (47) Karim,I (2405)-El Jawich,A (2139) Doha 2011}) 8... Bg7 9. Be3 Bxc3 10. bxc3 Qc7 11. e5 h5 12. Re1 Bc6 (12... Qc6 $14) 13. h4 (13. e6 $1 $16) 13... Qa5 $2 {[#]} (13... Kf8 $14) 14. c4 $2 (14. e6 $1 $18 {[%cal Re6f7][%mdl 512] Black must now prevent exf7+.} fxe6 15. Qd3 Bxf3 16. Qxg6+ (16. gxf3 Kf7 $14) 16... Kf8 17. gxf3) 14... Kf8 $14 15. Bg5 Kg7 16. Qd3 Rd8 17. Qe3 Qb4 18. Qf4 Re8 19. Rad1 (19. Nd2 $16) 19... Qc3 20. Re2 Qb2 21. Qe3 Qb4 22. Qf4 Qa4 (22... Qb2 $1 $11) 23. Red2 $40 {[%mdl 128] White is up to no good.} (23. e6 $1 $16 {[%csl Ge6][%cal Rf4f7]} f6 24. Ne5) 23... Qxa2 $11 24. Kh2 Qa5 (24... Qb2 $11) 25. Rd3 {[%mdl 1024] White has compensation.} (25. e6 $5 {[%cal Rf4f7]} f6 26. Ne5 $11) 25... Rh7 26. Ng1 Kh8 27. Ne2 Qc7 (27... f6 $11 28. exf6 Rf7) 28. Qg3 Nh6 ({Black should try} 28... f6 $14 29. Bf4 Qc8) 29. Bxh6 $1 $16 Rxh6 30. Nf4 Kg7 (30... Kg8 $16 {was necessary.}) 31. Qg5 (31. e6 $18 {aiming for Nxh5+!} Qe5 32. exf7 Kxf7 33. Re3) 31... b5 (31... Qc8 $14) 32. Rg3 $1 $18 Kh7 (32... Bd7 $142) 33. Nh3 $2 ({White has to play} 33. e6 $1 $18 {[%cal Re6f7]} f6 34. Qxc5 Qxf4 35. Qxc6 {[%mdl 64] Double Attack}) 33... Kg7 $2 (33... Bd7 $1 $14) 34. Nf4 Kh7 $1 35. Nh3 $2 (35. e6 $1 $18 {[%cal Re6f7]} f6 36. Qxc5 Qxf4 37. Qxc6 {[%mdl 64] Double Attack} Qxh4+ 38. Kg1 $1 {[%mdl 512]}) 35... Bd7 36. Nf4 {White wants to play Nd5.} Bf5 37. Re1 b4 38. Nd5 Qd7 39. Ra1 Be4 $2 (39... Qa7 $11) 40. Nf4 $2 (40. Rxa6 $18 {e6! is the strong threat.} Bxd5 41. cxd5 Qxd5 42. e6) 40... Qc6 ({Weaker is} 40... Bxc2 {[#]} 41. e6 $1 $18 {[%mdl 512]}) 41. Nh3 (41. Nd5 $1 $11) 41... Bf5 ({Better is} 41... Kg7 $17 42. Qd2 Rhh8) 42. Qf4 $15 {Strongly threatening Ng5+.} Kg7 $2 {[%mdl 8192]} (42... Be6 $15) 43. Qxf5 $1 $18 Rhh8 44. e6 Rhf8 45. Nf4 Kh7 {[#]} 46. Nxg6 $1 {[%mdl 64] Pin. Accuracy: White = 49%, Black = 39%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.25"]
[Round "3.1"]
[White "Gajewski, Grzegorz"]
[Black "Piorun, Kacper"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2515"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "159"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,159,16,27,31,23,17,29,23,11,18,8,14,16,12,0,14,0,0,0,0,-3,1,0,4,9,16,0,5,0,0,0,11,0,0,-27,-35,-8,-7,-4,-5,-7,0,0,0,-7,0,0,0,0,0,0,20,8,39,37,33,0,75,74,68,52,116,80,83,72,197,195,202,131,164,166,211,205,212,194,206,186,189,154,143,163,263,263,252,110,143,110,427,270,376,175,372,348,392,401,393,389,384,373,370,369,366,0,66,0,366,344,337,312,575,573,632,631,618,620,610,601,601,594,562,529,890,906,904,872,865,846,779,335,281,109,109,0,0,0,109,0,0,0,0,0,0,0,8,8,8,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 Nbd7 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 8. e3 g5 9. Bg3 Ne4 {White has an edge.} 10. Nd2 Nxg3 11. hxg3 c6 12. Bd3 Nb6 13. Qc2 Qe7 14. O-O-O Be6 15. Kb1 O-O-O 16. a3 Bd6 17. Nb5 {[#]} Kb8 $146 ({Predecessor:} 17... Bb8 18. Nb3 Nc4 19. Nc3 Bd6 20. Nc1 Kb8 21. Bxc4 dxc4 22. N1e2 f5 23. Rd2 Qf7 {½-½ (23) Gyimesi,Z (2611)-Dizdar,G (2541) Austria 2007}) 18. Nxd6 Qxd6 19. Nb3 Nd7 {[%cal Bb6d7,Bd7f6,Bf6e4][%mdl 32]} 20. Rh2 Nf6 21. Nc5 Bc8 22. Bf5 b6 23. Nb3 Bxf5 24. Qxf5 Ne4 25. Nd2 Qf6 26. Qf3 Nxd2+ 27. Rxd2 Qg6+ 28. Ka2 Rd6 29. g4 Re8 30. Qf5 Re4 31. Re2 Qg8 32. Rh3 Qe8 33. Rf3 f6 34. Rh3 c5 (34... Rxd4 $1 $11 35. f3 Rd1) 35. dxc5 bxc5 36. Rxh6 Re5 (36... Qe6 $1 $14) 37. Qd3 d4 38. Ka1 Qa4 (38... Ree6 $16) 39. Rc2 $1 $18 Rd7 40. Rh8+ (40. Rxf6 $6 dxe3 41. Rd6 Rxd6 $16) 40... Kc7 41. e4 Kb7 42. f3 a6 43. Rc4 Qb5 44. a4 $1 {[%cal Ra4b5]} Qb6 45. Rc3 $36 {[%cal Bc4c3,Bc3b3,Bb3b6][%mdl 2080] Black is under strong pressure.} Qc6 46. Rb3+ Kc7 (46... Ka7 $142 47. Qc4 Qe6 48. Qxe6 Rxe6) 47. Qc4 $1 Qe6 48. Qxe6 (48. Qc2 $18 {Black must now prevent Rhb8.} Rd8 49. Rb7+ {[%mdl 64] Deflection} (49. Rh7+ Rd7 $16) 49... Kxb7 50. Rxd8) 48... Rxe6 {[%mdl 4096] Endgame KRR-KRR} 49. Kb1 $1 Kd6 $2 {[%mdl 8192]} (49... c4 $16 50. Rbb8 Rc6 51. Rhc8+ Kd6) 50. Rc8 Ree7 51. Rb6+ {[%mdl 64] Double Attack} Ke5 52. Kc2 (52. Rxc5+ Kf4 $14) 52... Rc7 53. Rxc7 Rxc7 54. Rxa6 {KR-KR} c4 55. g3 Rh7 56. Ra5+ $1 Ke6 57. Ra6+ $2 (57. Rd5 $18) 57... Ke5 $14 {next ...Rh2+ is good for Black.} 58. Ra5+ $2 {[%mdl 8192]} (58. Ra8 $1 $14) 58... Ke6 $18 59. Rd5 Rh2+ 60. Kb1 c3 $2 (60... d3 {keeps fighting.} 61. a5 Rh7) 61. bxc3 dxc3 62. a5 {[%cal Ba4a5,Ba5a6][%mdl 32]} Rb2+ 63. Kc1 Ra2 64. Rc5 Kd6 65. Rf5 Ke6 66. Rb5 Rf2 67. a6 Ra2 {[#]} 68. Rb6+ $1 Ke5 69. Kb1 Ra3 70. Kc2 (70. Rc6 $142 Ra5 71. Rb6 (71. Rxc3 Rxa6 72. Rd3 Ra7 $16)) 70... Kd4 {intending ...Ra2+.} 71. Rxf6 $2 (71. Rd6+ $18 {has better winning chances.} Ke5 72. Rb6) 71... Ra2+ $16 72. Kc1 Ra1+ 73. Kc2 Ra2+ {[#]} 74. Kb1 (74. Kb3 $1 $16 {[%cal Rb3a2]} c2 75. Rc6 (75. Kxa2 $2 {loses.} c1=Q $19) 75... Rxa6 76. Rc4+ (76. Rxc2 Rb6+ 77. Ka4 Rf6 $18) 76... Ke3 77. Rc3+ (77. Kxc2 Kxf3 {[%mdl 64] Double Attack} 78. e5 Ra5 $11) 77... Kf2 78. Kxc2) 74... c2+ $1 $11 {The position is equal.} 75. Kc1 {aiming for Kd2.} Kc3 {[%cal Ra2a1]} 76. Rc6+ Kd3 $1 77. a7 {[%mdl 64] Deflection} Rxa7 {...Ra1+ is the strong threat.} 78. Rxc2 {Threatens to win with e5.} Rf7 $1 79. Ra2 Rxf3 {( -> ...Rf1+)} 80. Ra5 {Blacks defense is rewarded with a draw. Accuracy: White = 79%, Black = 72%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.25"]
[Round "3.1"]
[White "Sadzikowski, Daniel"]
[Black "Heberla, Bartlomiej"]
[Result "1/2-1/2"]
[ECO "A63"]
[WhiteElo "2374"]
[BlackElo "2527"]
[Annotator "ChessBase"]
[PlyCount "63"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} c5 {[%emt 0:00:00]} 3. d5 {[%emt 0:00:00]} g6 {[%emt 0:00:00]} 4. Nc3 {[%emt 0:01:32]} Bg7 {[%emt 0:00:00]} 5. g3 {[%emt 0:02:19]} O-O {[%emt 0:01:09]} 6. Bg2 {[%emt 0:00:31]} e6 {[%emt 0:00:03]} 7. Nf3 {[%emt 0:00:14]} exd5 {[%emt 0:00:06]} 8. cxd5 {[%emt 0:00:04]} d6 {[%emt 0:00:03]} 9. O-O {[%emt 0:00:06]} Nbd7 {[%emt 0:00:05]} 10. Bf4 {[%emt 0:08:23]} Qe7 {[%emt 0:00:06]} 11. a4 {[%emt 0:09:15]} b6 {[%emt 0:03:54]} 12. Re1 {[%emt 0:01:55]} Ng4 {[%emt 0:00:56]} 13. Bg5 {[%emt 0:02:33]} f6 {[%emt 0:03:38]} 14. Bc1 {[%emt 0:01:07]} Nde5 {[%emt 0:11:41]} 15. h3 {[%emt 0:13:04]} Nh6 {[%emt 0:00:16]} 16. Nxe5 {[%emt 0:00:45]} fxe5 {[%emt 0:00:29]} 17. e4 {[%emt 0:00:44]} Nf7 {[%emt 0:03:46]} 18. Kh2 {[%emt 0:09:00]} h5 {[%emt 0:02:55]} 19. Qe2 {[%emt 0:01:35]} Bh6 {[%emt 0:18:50]} 20. Bxh6 {[%emt 0:05:07]} Nxh6 {[%emt 0:01:22]} 21. a5 {[%emt 0:06:47]} Bd7 {[%emt 0:01:06]} 22. Rf1 {[%emt 0:01:03]} h4 {[%emt 0:02:15]} 23. Qe3 {[%emt 0:04:32]} Kg7 {[%emt 0:09:38]} 24. axb6 {[%emt 0:06:56]} axb6 {[%emt 0:00:11]} 25. Kg1 {[%emt 0:00:26]} hxg3 {[%emt 0:14:15]} 26. fxg3 {[%emt 0:00:18]} Rxf1+ {[%emt 0:00:07]} 27. Rxf1 {[%emt 0:00:04]} b5 {[%emt 0:00:10]} 28. Rb1 {[%emt 0:04:23]} b4 {[%emt 0:03:27]} 29. Nd1 {[%emt 0:00:03]} Nf7 {[%emt 0:00:52]} 30. Qd2 {[%emt 0:03:31]} Bb5 {[%emt 0:06:47]} 31. h4 {[%emt 0:00:53]} Nh6 {[%emt 0:03:05]} 32. Ne3 {[%emt 0:00:14]} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.2"]
[White "Piorun, Kacper"]
[Black "Gajewski, Grzegorz"]
[Result "1/2-1/2"]
[ECO "C80"]
[WhiteElo "2539"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,63,31,11,2,-32,-35,-31,-33,-26,-20,-46,-39,-31,-9,-52,-15,-25,0,0,18,0,4,0,0,0,0,0,0,-7,-8,-1,0,-7,-6,-7,-8,-8,0,0,0,0,0,0,0,0,0,0,3,0,13,13,20,22]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 Be7 7. Qe2 b5 {is now debated instead of 7...f5. C84: Closed Ruy Lopez: Unusual White 6th moves.} 8. d5 Nc5 {...e4 is the strong threat.} 9. dxc6 {[#] Hoping for Bb3.} Nxa4 {Black is slightly better.} 10. cxd7+ Bxd7 11. Nxe5 {And now Rd1 would win.} O-O 12. b3 Nb6 13. Bb2 Bf6 {[#]} (13... Re8 $5 {[%cal Re7d6]} 14. Nxd7 Qxd7 $15) 14. Nd2 $146 ({Predecessor:} 14. Nc3 Re8 15. f4 Bxe5 16. fxe5 Qg5 17. Qf2 Qg6 18. Ne2 Qxc2 19. Qxf7+ Kh8 20. Rab1 {1-0 (40) Milov,L (2400)-Buturin,V (2415) Alushta 1992}) 14... Bxe5 (14... Re8 $5 15. f4 $8 Be7 $11) 15. Qxe5 {[%csl Gb2][%cal Re5g7] [#]The position is equal.} f6 16. Qf4 Nd5 17. Qe4 Be8 18. Rfd1 Bg6 19. Qe6+ Bf7 20. Qc6 Qe8 21. Qc5 Qe7 22. Qxe7 Nxe7 23. Ne4 Rfd8 24. Nc5 Rxd1+ 25. Rxd1 Nd5 26. f3 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 27. Kf2 a4 28. a3 Nb6 29. g4 h6 30. Rd2 Bd5 31. Nd7 {Threatens to win with Nxb6.} Bf7 32. Nxb6 {Accuracy: White = 90%, Black = 91%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.2"]
[White "Heberla, Bartlomiej"]
[Black "Sadzikowski, Daniel"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2527"]
[BlackElo "2374"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,69,4,-5,0,-2,-7,-3,18,9,8,-4,-1,-29,-15,-30,-32,-21,-6,-12,-4,-66,-7,-10,0,0,0,-14,-14,-17,-14,-14,-10,-15,0,-2,0,0,0,-3,-3,-6,-6,-11,-10,-10,-7,-8,-6,-35,-33,-29,-24,-34,-33,-36,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd2 Be7 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} 7. Bd3 dxc4 8. Bxc4 c5 9. dxc5 Bxc5 10. Qc2 Nbd7 {[%cal Bb8d7,Bd7e5,Be5d3][%mdl 32] [#]} 11. Ng5 $146 ({Predecessor:} 11. O-O a6 12. Ne4 Nxe4 13. Qxe4 Nf6 14. Qc2 {½-½ (14) Psakhis,L (2475)-Zifroni,D (2440) Israel 2018}) 11... b6 12. Bd3 {[%cal Rd3h7]} h6 13. Nh7 Ne5 14. Nxf6+ Qxf6 15. Bh7+ Kh8 16. Ne4 {[%mdl 64] [#] Double Attack} Qe7 {Strongly threatening ...f5.} 17. Nxc5 f5 18. Nd3 Nxd3+ 19. Qxd3 {Hoping for Bg6.} Kxh7 20. O-O Rd8 21. Bb4 Rxd3 22. Bxe7 Ba6 {[#] ...Rd7 is the strong threat.} 23. Rfd1 Rc8 24. Bb4 Rxd1+ 25. Rxd1 $11 {[%mdl 4096] Endgame KRB-KRB} Be2 26. Re1 Rc2 27. Bc3 g5 28. h3 h5 29. h4 gxh4 30. Kh2 Kg6 31. a4 Kg5 32. Bd4 Bc4 33. f3 {The position is equal.} Be2 {White must now prevent ...Bxf3.} 34. Kh3 $1 Rd2 35. Bc3 {Accuracy: White = 92%, Black = 96%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.3"]
[White "Piorun, Kacper"]
[Black "Gajewski, Grzegorz"]
[Result "1/2-1/2"]
[ECO "C80"]
[WhiteElo "2539"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "138"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,138,44,52,50,63,63,50,33,55,46,63,60,59,55,42,36,36,33,33,14,9,0,3,10,7,0,0,0,0,0,0,-45,-52,-64,-6,-6,-8,-16,-28,-38,-16,-19,-14,-27,-27,-35,-35,-35,-35,-35,-35,-35,-35,-35,-34,-34,-34,-35,-34,-35,-35,-35,-35,-35,-35,-42,-35,-35,-35,-35,-35,-35,-35,-35,-35,-42,-35,-42,-35,-37,-35,-40,-5,-7,-8,-37,-37,-37,-37,-37,-22,-22,-22,-22,-17,-17,-17,-17,-17,-17,-10,-17,-17,-17,-17,-17,-17,-17,-17,-17,-17,-17,-17,-17,-17,-17,-17,-17,0,-17,0,-17,-17,-17,-17,-17,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 Be7 7. Re1 b5 $1 {[%mdl 4] is currently scoring better than 7...f5.} 8. Rxe4 {[#] aiming for Bb3. C84: Closed Ruy Lopez: Unusual White 6th moves.} d5 9. Nxe5 Nxe5 10. Rxe5 {Black must now prevent Bb3.White is slightly better.} bxa4 11. Qe2 c6 12. Nc3 Ra7 {[#]} 13. Bf4 $146 ({Predecessor:} 13. Nxa4 O-O 14. Bd2 Bd6 15. f4 Bxe5 16. fxe5 Bf5 17. Bb4 Re8 18. Qf2 Bg6 19. Bd6 {½-½ (65) Saric,I (2695)-Ragger,M (2687) St Petersburg 2018}) 13... a3 14. bxa3 O-O 15. Re1 {[%cal Re5e7]} Bxa3 16. Na4 Qa5 17. Nc5 $1 Bxc5 18. dxc5 Rb7 19. Qe3 Qxa2 20. Qg3 Qxc2 {[#] And now ...f6 would win.} 21. h4 $1 Rb1 22. Rxb1 Qxb1+ 23. Kh2 f6 ({Better is} 23... Qb7 $15 24. Re1 Qd7) 24. Re7 $11 {[%csl Ge7][%cal Rg3g7]} Qg6 $1 25. Qxg6 hxg6 {[%mdl 4096] Endgame KRB-KRB} 26. Rc7 Bf5 27. Rxc6 Rc8 28. Rxa6 Rxc5 29. Be3 Rc4 30. Rd6 Rxh4+ 31. Kg1 Ra4 32. Rxd5 Kf7 33. Rb5 Ra1+ 34. Kh2 Rd1 35. Rb7+ Bd7 36. Rb6 g5 37. Rb2 Be6 38. Rb7+ Kg6 39. Rb5 Bd5 40. Rb2 Bc6 41. Rb6 Be4 42. Ra6 Rd5 43. Ra4 Bf5 44. Ra6 Bd7 45. Rb6 Re5 46. Rd6 Be6 47. Rb6 f5 48. Bd4 Re4 49. f3 Rxd4 50. Rxe6+ $15 {KR-KR} Kf7 51. Ra6 g4 52. Kg3 {The position is equal.} gxf3 53. gxf3 g6 54. Ra7+ Kf6 55. f4 Rd3+ 56. Kf2 Rb3 57. Rc7 Rb6 58. Kf3 Re6 59. Ra7 Re7 60. Ra6+ Kg7 61. Ra1 Rb7 62. Kg3 Rb3+ 63. Kg2 Rb6 64. Kg3 Kf6 65. Ra7 Ke6 66. Ra5 Rb3+ 67. Kf2 Rd3 68. Ra6+ Rd6 69. Ra5 Rb6 {Accuracy: White = 96%, Black = 96%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.3"]
[White "Heberla, Bartlomiej"]
[Black "Sadzikowski, Daniel"]
[Result "0-1"]
[ECO "D38"]
[WhiteElo "2527"]
[BlackElo "2374"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,134,18,-8,0,0,0,5,7,11,6,6,9,0,0,-6,0,-39,-31,-24,-25,-18,-18,-10,-22,-25,-20,-27,-26,-85,-39,-114,-128,-120,-137,-132,-106,-102,-102,-233,-236,-231,-229,-274,-293,-440,-461,-433,-293,-277,-292,-269,-281,-254,-250,-260,-172,-176,-177,-239,-158,-152,-106,-379,-380,-374,-112,-379,-358,-490,-492,-488,-493,-489,-489,-473,-472,-518,-502,-695,-695,-675,-649,-29962,-29964,-29973,-29974,-29974,-29975,-29975,-29976,-29976,-29977,-29977,-29977,-29977,-29978,-29978,-29970,-29978,-29979,-29980,-29981,-29981,-29981,-29981,-29980,-29980,-29980,-29980,-29981,-29981,-29982,-29982,-29983,-29983,-29984,-29984,-29985,-29985,-29986,-29986,-29987,-29989,-29988,-29988,-29989]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd2 Be7 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} 7. cxd5 exd5 8. Bd3 Nbd7 {The position is equal.} 9. O-O c6 10. Qc2 h6 {[#]} 11. Rab1 $146 ({Predecessor:} 11. Rfb1 Re8 12. b4 Bd6 13. a4 Qe7 14. b5 c5 15. Qa2 c4 16. Bc2 b6 17. Bc1 {½-½ (32) Siegel,W (2146)-Rawlings,A (2334) ICCF email 2010}) 11... Re8 12. b4 Bd6 13. Ne2 Ne4 14. Ng3 Nxg3 15. hxg3 a6 {[%cal Ba7a6,Ba6a5,Ba5a4][%mdl 32]} 16. a4 Nf6 17. b5 cxb5 $1 18. axb5 a5 19. b6 (19. Ra1 $11) 19... Bd7 20. Bb5 ({White should play} 20. Qa2 $15) 20... a4 $17 21. Ne5 Bxb5 22. Rxb5 Qe7 23. Ra1 {[#]} Rec8 $1 {[%cal Rc8c2]} 24. Qa2 (24. Qd1 $17) 24... Bxe5 $19 25. dxe5 Qxe5 26. Rb4 a3 27. Rd4 {[#]} (27. Qb1 $142) 27... Rc4 $1 {[%mdl 512]} 28. Bb4 (28. Rxc4 dxc4) 28... Rxd4 29. exd4 Qxd4 30. Bxa3 Qxb6 31. Qc2 Qc6 32. Qb2 Re8 33. Rb1 h5 34. Rc1 (34. Bb4 {was called for.}) 34... Qa4 35. Bc5 Qe4 {aiming for ...Qe1+!} 36. Bd4 $2 {[%mdl 8192] [#]} (36. f3 $17 Qd3 37. Qb1) 36... Qe1+ $1 {[%mdl 512]} 37. Kh2 (37. Rxe1 $2 {leads to mate.} Rxe1+ 38. Kh2 Ng4+ 39. Kh3 Rh1#) 37... Ng4+ 38. Kh3 Qe6 39. Qb6 Nxf2+ 40. Kh2 Ng4+ 41. Kh1 Qxb6 42. Bxb6 {[%mdl 4096] Endgame KRB-KRN} f6 43. Bg1 b5 44. Rc5 Rb8 45. Rxd5 b4 46. Bd4 b3 {Black mates.} 47. Bb2 Re8 {[%cal Re8e1]} 48. Bd4 {[#]} b2 $1 49. Rb5 (49. Bxb2 Re1#) 49... Re1+ 50. Bg1 Nf2+ 51. Kh2 b1=Q 52. Rxb1 Rxb1 53. Bxf2 {KR-KB} Kh7 54. Be3 Kg6 55. Bd4 Kf5 56. Bc5 Kg4 57. Ba7 Rb3 58. Bf2 Rd3 59. Be1 g5 60. Bf2 Kf5 61. Bb6 Rd1 62. Bc5 g4 63. Be7 Ke4 64. Bxf6 Kd3 65. Bd4 Ke2 66. Bf2 Kf1 67. Be3 Re1 {Accuracy: White = 62%, Black = 84%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.4"]
[White "Gajewski, Grzegorz"]
[Black "Piorun, Kacper"]
[Result "1/2-1/2"]
[ECO "A16"]
[WhiteElo "2515"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "127"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,127,0,0,2,12,12,19,0,77,68,57,45,64,0,0,0,39,0,43,35,56,41,39,38,52,53,64,45,73,55,52,46,51,27,25,0,20,0,0,0,0,0,0,0,63,28,24,16,10,0,0,-8,25,41,46,30,44,30,41,16,23,0,20,15,9,13,25,25,25,21,21,29,78,75,90,90,92,90,90,90,91,91,93,69,75,75,79,68,80,80,80,80,80,80,77,33,257,-29999,66,66,66,66,66,0,0,0,0,0,0,0,0,0]} 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. e3 d5 5. cxd5 exd5 6. d4 a6 7. dxc5 Bxc5 8. Be2 Nc6 9. O-O O-O 10. b3 {D32: Tarrasch Defence: Sidelines and lines without g3.} Bg4 11. Bb2 Ba7 12. Nd4 Be6 (12... Bxd4 $11 {remains equal.} 13. Bxg4 Be5) 13. Nxc6 $16 (13. Nxe6 fxe6 14. Rc1 Qd6 $11) 13... bxc6 14. Na4 Ne4 {[#]} 15. Ba3 $146 ({Much weaker is} 15. Bxa6 $6 Bxe3 16. fxe3 Rxa6 $11) (15. Rc1 $14) ({Predecessor:} 15. Rc1 Qd6 16. Bd3 Bb8 17. f4 Bf5 18. Bd4 Ba7 19. Bxe4 Bxe4 20. Rf2 {½-½ (31) Raznikov,D (2490)-Kursova,M (2326) Yerevan 2014}) 15... Re8 $11 16. Rc1 Bd7 17. Nc5 Nxc5 18. Bxc5 Bb8 19. Bf3 Bf5 20. Re1 Qf6 21. Bd4 Qe6 22. Qd2 Bd6 23. g3 Ba3 24. Bb2 Bf8 25. b4 Be4 26. Be2 Rec8 ({Of course not} 26... Qh3 $6 27. f3 $16) 27. f3 Bg6 28. Bd4 a5 29. bxa5 c5 $1 {[%cal Rc5d4]} 30. Bc3 h5 (30... c4 $11) 31. Bd3 Bxd3 32. Qxd3 Be7 33. Red1 Rd8 34. Rb1 d4 (34... c4 {with more complications.} 35. Qd4 Bf6 36. Qd2 Bxc3 37. Qxc3 Qc6) 35. exd4 cxd4 36. Bd2 ({Wrong is} 36. Bxd4 $2 Bc5 $19) 36... Qxa2 37. Re1 Bc5 38. Rb5 Rac8 39. Rc1 Ba7 40. Rxc8 Rxc8 41. Rxh5 $40 {[%mdl 128] [#] aiming for Qh7+. White mounts an attack.} Qc2 42. Qxc2 Rxc2 {[%mdl 4096] Endgame KRB-KRB} 43. Bf4 $1 d3+ 44. Kf1 Ra2 {[#]} 45. Rd5 $1 f6 46. h4 Kh7 47. h5 Ra1+ 48. Kg2 Ra2+ 49. Kh3 Bf2 50. Kg4 Be1 51. Rxd3 {And now Rd7 would win.} Rxa5 52. Rd7 Kg8 53. h6 gxh6 54. Bxh6 f5+ 55. Kf4 Bc3 56. Bg5 {Hoping for Bh4.} Kf8 $2 (56... Bb2 $14 57. Rd1 Kf7) 57. Rb7 $4 {[%mdl 8192]} (57. Bd8 $18 Rb5 58. Kg5) 57... Be5+ $2 (57... Bd2# {mates}) 58. Kxf5 $14 {Threatens to win with Be7+.} Bxg3+ 59. Kg6 Ra6+ 60. Bf6 ({White should play} 60. Kh7 $14) 60... Be5 $1 $11 {The position is equal.} 61. Rf7+ Kg8 62. f4 Bd4 63. Rg7+ Kf8 64. Rf7+ {Accuracy: White = 81%, Black = 76%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.4"]
[White "Sadzikowski, Daniel"]
[Black "Heberla, Bartlomiej"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2374"]
[BlackElo "2527"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,66,15,4,27,29,53,47,49,48,48,49,49,50,75,42,57,37,28,44,45,44,42,42,56,58,77,22,59,57,106,130,102,125,233,226,268,270,383,377,377,384,599,591,566,561,770,676,1694,1660,2019,1987,1541]} 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d6 5. Nc3 O-O 6. O-O e5 7. d3 Re8 8. Rb1 $1 {8.Rb1 scores better than 8.Bg5.} c6 9. e4 a6 {A24: English Opening vs King's Indian: Lines without ...Nc6.} 10. b4 b5 11. a4 bxc4 {White is slightly better.} 12. dxc4 {[#]} Bf8 $146 ({Predecessor:} 12... Be6 13. Qe2 h6 14. Rd1 Qc7 15. Ba3 Nbd7 16. Rb2 Nb6 17. Nd2 Bg4 18. Bf3 h5 19. Bxg4 Nxg4 {0-1 (57) Auciello,S (2346)-Sorin,A (2512) Buenos Aires 2002}) 13. Qe2 Nbd7 {[%cal Bb8d7,Bd7c5,Bc5e6,Be6d4][%mdl 32]} 14. Rd1 Bb7 15. h3 Qc7 16. Bd2 a5 17. b5 $1 Nc5 18. Ne1 Ne6 19. Nc2 Nd4 20. Qd3 $1 c5 21. Nd5 ({White should try} 21. Ne3 $16) 21... Bxd5 22. Nxd4 $1 Bxc4 23. Qxc4 exd4 24. b6 {[%cal Bb5b6,Bb6b7][%mdl 32]} Qd7 {[#]} (24... Qb7 $16) 25. Qb5 $1 $18 Qxb5 26. Rxb5 Nxe4 (26... d5 $142 27. b7 (27. Bxa5 dxe4 28. b7 Ra6 $14) (27. Rxa5 Rxa5 28. Bxa5 dxe4 $14) 27... Rab8 28. exd5 Bd6) 27. b7 Rab8 28. Bxa5 d5 (28... Nc3 $142) 29. Bxe4 {White is clearly winning.} dxe4 30. Bc7 e3 {[#] And now ...e2 would win.} 31. fxe3 dxe3 32. Bxb8 Rxb8 33. a5 Bg7 {Accuracy: White = 90%, Black = 51%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.5"]
[White "Piorun, Kacper"]
[Black "Gajewski, Grzegorz"]
[Result "1-0"]
[ECO "C80"]
[WhiteElo "2539"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,101,41,38,52,52,57,60,55,55,35,55,39,55,52,51,41,45,32,37,6,60,56,57,20,29,31,53,48,53,30,101,63,170,162,168,170,152,166,181,89,99,83,128,76,76,76,87,76,76,76,76,76,76,76,148,141,153,137,145,134,140,138,141,142,146,149,125,132,200,196,327,310,389,378,426,404,395,378,374,357,341,316,1704,1493,1493,288,29983,552,29984,29985]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 Be7 7. Re1 b5 {is now more promising than 7...f5.} 8. Rxe4 {C84: Closed Ruy Lopez: Unusual White 6th moves.} d5 9. Nxe5 Nxe5 10. Rxe5 {Bb3 is the strong threat.White is slightly better.} bxa4 11. Qe2 c6 {[#]} 12. Bf4 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 12. Bd2 Be6 13. f4 g6 14. Nc3 a3 15. b3 Bd6 16. f5 gxf5 17. Rf1 Bxe5 18. Qxe5 {½-½ (46) Vachier Lagrave,M (2780)-Carlsen,M (2872) London 2019}) 12... Ra7 13. Nc3 a3 14. bxa3 O-O 15. Re3 Bxa3 16. Na4 Be7 (16... Re7 $1 $11) 17. Re1 $36 {[%cal Re3e7][%mdl 2048] White is pushing.} Be6 18. Nc5 Bxc5 $1 19. dxc5 Re8 20. Bd6 h6 21. Qd2 Qg5 (21... Rb7 $11) 22. Qd4 {Black must now prevent Rg3.} Kh7 (22... Qf5 $1 $14) 23. Rg3 $1 $18 {[%cal Rg3g5]} Qf6 24. Be5 $1 {[%cal Re5f6]} Bf5 25. f4 Rae7 {With the idea ...Bg6.} 26. Ree3 ({Stronger than} 26. Bxf6 Rxe1+ 27. Kf2 R1e2+ 28. Kg1 Re1+ 29. Kf2 R1e2+ 30. Kg1 Re1+ $11) (26. h3 $18 Rxe5 27. Rxe5 (27. fxe5 Qe6 $16)) 26... Rxe5 $16 27. fxe5 Qe6 28. c3 ({White should try} 28. Re2) 28... Rb8 29. h3 Bg6 30. Re2 Rb5 31. a4 Rb1+ 32. Kh2 a5 33. Rge3 Ra1 ({Better is} 33... Be4) 34. c4 $1 Rxa4 35. cxd5 {[%mdl 64] Discovered Attack} Rxd4 36. dxe6 fxe6 {[%mdl 4096] Endgame KRR-KRB} 37. Ra2 a4 38. Rea3 Re4 39. Rxa4 Rxe5 40. Rc4 Bd3 {[#]} (40... h5 $16 41. Rc3 Re1) 41. Rc3 $1 $18 {[%cal Rc3d3]} Bb5 (41... Rd5 {might work better.} 42. Raa3 Bf1) 42. Ra7 Rg5 43. Rg3 Rxg3 44. Kxg3 {KR-KB} Kg6 45. Kf4 Kf6 46. Rd7 Bc4 47. h4 e5+ $2 (47... h5 48. Rd6 Bd5) 48. Ke3 Bd5 49. Rd6+ $2 (49. g4 {Hoping for g5+!} Bh1 {[#]} 50. g5+ $1 {[%mdl 512]} hxg5 51. hxg5+ Kg6 52. Rd1) 49... Kf5 $2 {[#]} (49... Kf7 $18 50. Rd7+ Kf6) 50. g4+ $1 {[%mdl 512]} Kxg4 {[#]} 51. Rxd5 $1 {[%mdl 512] Accuracy: White = 78%, Black = 58%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.6"]
[White "Gajewski, Grzegorz"]
[Black "Piorun, Kacper"]
[Result "0-1"]
[ECO "A15"]
[WhiteElo "2515"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "104"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,104,22,-2,6,6,14,12,15,0,0,0,9,0,14,10,60,40,62,50,35,0,72,1,0,-13,-13,-26,-13,-14,-12,-3,31,16,44,35,54,-24,0,-17,105,-131,-106,-177,-205,-195,-143,-502,-508,-631,-616,-1421,-1389,-1619,-455,-436,-453,-434,-321,-433,-421,-474,-432,-470,-464,-512,-456,-513,-506,-590,-571,-567,-583,-583,-577,-562,-558,-541,-535,-736,-648,-781,-566,-683,-677,-670,-670,-610,-594,-714,-641,-688,-683,-675,-670]} 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. e3 d6 6. Nge2 e5 7. d4 exd4 {E61: King's Indian: Early deviations for White, including Smyslov System.} 8. Nxd4 Re8 9. O-O Nbd7 {The position is equal.} 10. h3 Nc5 11. Qc2 a5 12. b3 h5 13. Bb2 h4 14. g4 $1 {[#]} c6 $146 ({Predecessor:} 14... Nxg4 15. hxg4 Bxg4 16. f3 Bd7 17. Qf2 Qg5 18. f4 Qh6 19. Rad1 h3 20. Bf3 c6 {1-0 (84) Erigaisi,A (2559)-Travadon,L (2431) chess.com INT 2020}) 15. Rae1 Qe7 16. Rd1 Nh7 (16... Nxg4 $11 17. hxg4 Bxg4) 17. Nf3 (17. e4 $16) 17... f5 $11 18. gxf5 Bxf5 19. Qe2 g5 20. Nd4 Bd7 21. Kh1 Kh8 22. Rg1 Qf7 23. Qc2 Rf8 24. Rdf1 ({White should play} 24. Rd2 $14) 24... Rae8 25. Nce2 Qh5 (25... Qe7 $11 {remains equal.}) 26. Qd1 $2 (26. Nf4 $1 $16 {[%cal Rf4h5]} gxf4 27. Bf3) 26... Nf6 27. Nc2 (27. f4 $17 {keeps fighting.}) 27... Nfe4 $1 $19 28. Bxg7+ Kxg7 29. Qd4+ $2 {[%mdl 8192] This costs White the game.} (29. Kh2 $17 {is more resistant.}) 29... Kh7 30. f3 Ng3+ 31. Nxg3 hxg3 32. Qxd6 {[#]} Bxh3 (32... Rf4 $142 $3 {[%mdl 512]} 33. Qc7 {[#]} (33. exf4 Bxh3) 33... Rh4 $1 {[%mdl 512]} 34. Qxg3 Bxh3 35. Bxh3 Rxh3+ {[%mdl 64] Double Attack} 36. Kg2 Rxg3+ 37. Kxg3 Kg7) 33. Qxg3 Bf5+ {[%mdl 64] Discovered Attack} 34. Qh2 Qxh2+ 35. Kxh2 Bxc2 {Black is clearly winning.} 36. e4 Bd3 37. Re1 {[#]} g4 $1 38. fxg4 Bxe4 39. Bxe4+ Rxe4 40. Rxe4 Nxe4 {[%mdl 4096] Endgame KRN-KR} 41. Re1 Rf4 42. Kh3 Kg6 43. Kh4 Kf6 44. Re2 Ke5 45. Re1 Rf8 {[%cal Rf8h8]} 46. Kh3 Rh8+ 47. Kg2 Kf4 48. Rf1+ Kxg4 49. Rf7 Nc5 50. Kf2 Re8 51. Rg7+ Kf4 52. Rf7+ Ke4 {Accuracy: White = 49%, Black = 74%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.26"]
[Round "3.7"]
[White "Gajewski, Grzegorz"]
[Black "Piorun, Kacper"]
[Result "1-0"]
[ECO "A34"]
[WhiteElo "2515"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,76,27,35,48,33,62,75,68,68,79,72,74,87,85,69,101,99,102,117,108,110,191,189,174,179,143,153,224,254,238,246,305,282,376,362,293,250,248,13,12,0,0,0,0,0,0,0,0,28,625,625,600,592,724,724,724,724,724,724,29986,724,671]} 1. c4 Nf6 2. Nc3 c5 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. d4 cxd4 7. Nxd4 Nc6 8. O-O Qa5 9. e3 {The modern move.} Qb4 {A39: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3 Nf6 6 0-0 0-0 7 d4.} 10. Qe2 {[#]} Nxd4 $146 ({Predecessor:} 10... d6 11. Nxc6 bxc6 12. Bxc6 Rb8 13. Rb1 Bg4 14. Qd3 Rfc8 15. Bb5 Rxb5 16. cxb5 Bf5 17. e4 Nxe4 {1-0 (26) Lozano,A (1886)-Laohawirapap,P (1821) Bangkok 2020}) 11. exd4 Re8 {White is better.} 12. a3 Qa5 13. b4 Qd8 14. h3 $36 {[%mdl 2048] White is on the roll.} d6 15. Be3 Rb8 16. Rfd1 Bd7 17. Rac1 Qc8 18. Kh2 b6 {[#]} (18... a6 $16 {keeps fighting.}) 19. c5 $1 $18 bxc5 20. dxc5 dxc5 21. Bxc5 {[%mdl 64] Double Attack, Discovered Attack} Bc6 (21... Bh6 $16) 22. Bxc6 Qxc6 23. Bxa7 Ra8 24. Nd5 Qa4 {Threatens to win with ...Nxd5.} 25. Nxe7+ Kh8 26. Bc5 Ng8 27. b5 $2 ({Better is} 27. Rd3 $18) 27... Nxe7 $11 28. Bxe7 Qa7 $1 29. Bc5 {aiming for Qxe8+!} Rxe2 30. Bxa7 Rxa7 31. Rd8+ Bf8 $1 {...Kg7 is the strong threat.} 32. b6 Rxa3 $2 {[%mdl 8192] This costs Black the game.} (32... Rae7 $11 33. Kg2 (33. Rxf8+ Kg7 $11) 33... Kg7) 33. b7 $18 Rxf2+ 34. Kg1 Raa2 35. b8=Q {White wants to mate with Qe5+.} Rg2+ 36. Kf1 Rgf2+ {[#]} 37. Ke1 $1 {White threatens Qe5+ and mate.} Rae2+ 38. Kd1 Kg7 {Accuracy: White = 83%, Black = 51%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.27"]
[Round "4.1"]
[White "Piorun, Kacper"]
[Black "Sadzikowski, Daniel"]
[Result "1/2-1/2"]
[ECO "C88"]
[WhiteElo "2539"]
[BlackElo "2374"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,79,19,36,11,20,4,22,0,10,0,0,0,8,0,0,0,10,6,7,0,0,-10,-14,-14,-14,-26,3,0,16,-34,-15,-20,-8,-17,-21,-20,0,0,0,0,0,0,0,0,0,0,0,0,247,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. a4 Bd7 9. c3 O-O 10. d3 {C90: Closed Ruy Lopez with 7...d6: Early deviations.} h6 11. Nbd2 Re8 12. Nf1 Bf8 13. Ne3 Na5 14. Bc2 c5 15. h3 b4 16. Nd2 {[#]} bxc3 $146 ({Predecessor:} 16... Rb8 17. Ndc4 Nxc4 18. dxc4 bxc3 19. bxc3 a5 20. Rf1 Bc8 21. Bd2 Re7 22. Qf3 Reb7 {0-1 (68) Broadway,D (2280)-Gromotka,H (2367) ICCF email 2017}) 17. bxc3 Bc6 18. Qf3 d5 19. exd5 Nxd5 20. Nxd5 Qxd5 21. Ne4 Re6 22. Ba3 Rg6 23. Kh2 Qe6 24. g4 c4 25. Bxf8 Rxf8 {[%cal Ba8f8,Bf8f5,Bf5f3][%mdl 32]} 26. Qf5 Bxe4 27. Qxe4 f5 28. gxf5 Rxf5 29. Re2 $1 {Hoping for d4.} Rgf6 30. dxc4 {Strongly threatening Qa8+.} Rf3 31. Kg1 Qxh3 32. Rb1 {aiming for Qd5+.} Nb3 $2 {[#]} (32... g6 $11) 33. Rd1 $2 ({Worse is} 33. Bxb3 R6f4 $11) ({Not} 33. Qxe5 Qg4+ 34. Kf1 Qh3+ 35. Kg1 Qg4+ 36. Kf1 Qh3+ 37. Kg1 $11) (33. Rxb3 $2 {[#] gets mated.} Rg3+ $1 {[%mdl 512]} 34. fxg3 Rf1#) (33. Rd2 $1 $18 {[%cal Rd2d8] Threatens to win with Rd8+.} R6f5 34. Rd8+ Kf7 35. Qd5+ Kg6 36. Bxf5+ Rxf5 37. Qd3 Qxd3 38. Rxd3) 33... Nd4 $1 $11 {The position is equal.} 34. cxd4 R6f4 $1 {White must now prevent ...Qg4+.} 35. Qa8+ Kf7 {[%cal Rf4g4]} 36. Qd5+ Kf8 {[%cal Rf4g4]} 37. Qd6+ Kg8 {[%cal Rf4g4]} 38. Qd8+ Kf7 {[%cal Rf4g4]} 39. Qd5+ Kf8 {[%cal Rf4g4]} 40. Qd6+ {Accuracy: White = 88%, Black = 92%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.27"]
[Round "4.1"]
[White "Gajewski, Grzegorz"]
[Black "Heberla, Bartlomiej"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2515"]
[BlackElo "2527"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,61,16,22,24,29,31,26,22,29,0,0,0,0,1,15,0,0,0,-14,0,26,-8,0,0,6,6,3,7,12,12,12,12,12,12,10,10,10,12,22,22,22,23,20,15,18,18,22,0,0,0,0,0,0,0]} 1. d4 g6 2. c4 Bg7 3. Nc3 e6 4. e4 Ne7 5. Nf3 d5 6. e5 {A40: Unusual replies to 1 d4.} c5 7. dxc5 O-O 8. Be2 {[#] White has an edge.} Nd7 $146 ({Predecessor:} 8... Nbc6 9. Bf4 Qa5 10. O-O dxc4 11. Ne4 Nd5 12. Qc1 c3 13. bxc3 Nxf4 14. Qxf4 Qc7 {0-1 (60) Wang,H (2707)-Maghsoodloo,P (2615) Sharjah 2018}) 9. Bf4 (9. Bg5 $5 {[%cal Rc4d5]} Nxe5 10. cxd5 exd5 11. O-O $11) 9... Nxc5 10. O-O {Threatening Bg5.} dxc4 11. Bxc4 a6 12. Qxd8 Rxd8 13. Rfd1 Rxd1+ 14. Rxd1 {[#] aiming for Rd8+.} Nc6 15. Bd3 Bd7 16. Ne4 Nxe4 17. Bxe4 Be8 18. h4 Rd8 19. Rc1 h6 20. a3 Nd4 21. Nxd4 Rxd4 22. f3 Bc6 $1 {[%cal Rc6e4]} 23. Be3 Bxe5 24. Bxd4 Bxd4+ $11 {[%mdl 4096] Endgame KRB-KB} 25. Kh1 Bxb2 26. Rb1 {The position is equal.} Bxa3 27. Bxc6 bxc6 28. Rb6 a5 29. Rxc6 Be7 30. Ra6 Bxh4 31. Rxa5 {Not much happened in this game. Accuracy: White = 90%, Black = 100%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.28"]
[Round "4.2"]
[White "Sadzikowski, Daniel"]
[Black "Piorun, Kacper"]
[Result "1/2-1/2"]
[ECO "E04"]
[WhiteElo "2374"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,75,28,20,10,31,0,8,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-31,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 c5 6. O-O Nc6 7. dxc5 Qxd1 8. Rxd1 Bxc5 9. Nbd2 c3 10. bxc3 O-O 11. Nb3 Be7 12. c4 Bd7 13. Bb2 {E04: Open Catalan: 5 Nf3.} Rfd8 14. Ne5 Nxe5 15. Bxe5 Rac8 {[#]} 16. Rab1 $146 ({Predecessor:} 16. Na5 b6 17. Nb7 Re8 18. Nd6 Bxd6 19. Rxd6 Ba4 20. Rc1 Bb5 21. Rd4 Bc6 22. f3 {1-0 (68) Stefanova,A (2455)-Ushenina,A (2444) Hengshui 2019}) 16... Bc6 17. Rxd8+ Bxd8 18. Bxc6 Rxc6 19. Nd4 Rb6 $1 {[%cal Rb6b1]} 20. Rxb6 Bxb6 21. Bxf6 gxf6 $11 {[%mdl 4096] Endgame KB-KN} 22. Nb3 f5 23. e3 Kf8 24. Kf1 Ke7 25. Ke2 Kd6 26. Kd3 Kc6 27. Kc3 Bd8 28. a4 a6 29. Nd4+ Kc5 30. Nb3+ Kc6 31. Nc1 b5 32. axb5+ {The position is equal.} axb5 33. cxb5+ Kxb5 34. Kd3 Kc5 35. e4 fxe4+ 36. Kxe4 Kd6 37. Kf4 f5 38. g4 {A rather calm draw. Accuracy: White = 91%, Black = 95%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.28"]
[Round "4.3"]
[White "Heberla, Bartlomiej"]
[Black "Gajewski, Grzegorz"]
[Result "0-1"]
[ECO "D39"]
[WhiteElo "2527"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "170"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,170,18,23,20,23,14,13,6,11,13,5,0,16,0,0,0,0,-5,0,0,0,-2,-13,-33,-35,-36,-28,-60,-61,-52,-72,-68,-52,-80,-63,-71,-71,-71,-61,-59,-71,-71,-83,-79,-78,-79,-82,-88,-88,-106,-108,-150,-146,-168,-80,-97,-83,-107,-113,-114,-110,-116,-123,-133,-142,-140,-141,-159,-151,-145,-94,-99,-84,-85,-88,-130,-137,-177,-168,-174,-183,-185,-176,-187,-179,-190,-182,-179,-174,-165,-187,-177,-131,-112,-118,-164,-164,-164,-172,-587,-572,-587,-587,-562,-508,-628,-603,-620,-584,-622,-622,-617,-612,-599,-606,-606,-605,-581,-572,-3148,-2648,-2918,-2608,-2886,-2836,-2571,-2475,-2645,-2589,-2478,-2402,-2226,-2083,-2394,-2472,-2210,-1325,-29967,-29970,-29968,-29970,-29970,-29970,-29977,-29977,-29980,-29981,-29981,-29982,-29982,-29983,-29982,-29981,-29981,-29981,-29981,-29981]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4 6. e4 h6 7. Bxf6 Qxf6 8. Bxc4 c5 9. e5 {D39: Queen's Gambit Declined: Ragozin Defence with 5 Bg5 dxc4.} Qd8 10. O-O {10.d5 is vanishing.} cxd4 11. Ne4 {The position is equal.} O-O 12. Qe2 Be7 13. Rfd1 Qa5 14. Ng3 ({Of course not} 14. Rxd4 Nc6 $15) 14... Rd8 15. Qe4 Nd7 $1 16. Nh5 Nf8 17. Qg4 {[%csl Gh5][%cal Rg4g7]} g6 18. Bd3 Bd7 19. Nf6+ (19. b4 $5 Qxb4 20. Rab1 $17) 19... Bxf6 20. exf6 Bc6 {[#]} 21. Nxd4 $146 ({Predecessor:} 21. Qh4 Qh5 22. Qxh5 gxh5 23. Ne5 Nd7 24. Nxd7 Rxd7 25. f4 e5 26. Bf5 Rd5 27. Be4 {½-½ (40) L'Ami,E (2630)-Wojtaszek,R (2750) Baden-Baden 2018}) 21... Qe5 22. Nxc6 bxc6 23. Qe2 Qxf6 24. Be4 Qe5 25. Qc2 Rxd1+ 26. Rxd1 Rb8 27. b3 c5 28. Bf3 {[#]} Rd8 $1 {[%mdl 512]} 29. Rc1 (29. Rxd8 Qe1#) 29... Rd6 30. g3 Nd7 31. Be2 Rd4 32. Bf1 Qd5 33. Bg2 Qd6 $1 34. Qc3 e5 (34... Rd3 $1 $19 {[%cal Rd3c3]} 35. Qa5 Rd2) 35. Bh3 Rd1+ 36. Rxd1 Qxd1+ 37. Kg2 Qd5+ $1 38. Kg1 Nf6 $1 39. Bg2 Qd1+ 40. Bf1 Qd4 41. Qf3 Kg7 42. Bc4 Qe4 (42... e4 $142 43. Qf4 Nd5 44. Bxd5 Qd1+ 45. Kg2 Qxd5) 43. Qc3 $17 Qb1+ 44. Kg2 Qf5 {Hoping for ...Qxf2+!} ({Much worse is} 44... Qxa2 $6 45. Qxe5 Qc2 46. Qxc5 $11) 45. Bd3 Qd7 46. Kg1 Qd4 $36 {[%mdl 2048] Black has strong initiative.} 47. Qc2 e4 48. Be2 Nd5 49. Bc4 Nb4 50. Qe2 Nd3 51. Kg2 h5 52. Qd2 {[#]} Ne5 $1 53. Qc1 Ng4 54. Qf4 Qf6 55. h3 Qxf4 56. gxf4 $19 {[%mdl 4096] Endgame KB-KN} Nf6 57. Kf1 $2 (57. Kg3 {is tougher.}) 57... h4 58. Ke2 Nh5 59. Ke3 {[#]} f5 $1 60. Bd5 Kf6 61. f3 exf3 62. Bxf3 Ng7 63. Bd5 Ne6 64. Bg2 g5 65. fxg5+ Nxg5 66. Kd3 f4 67. Kc4 f3 68. Bf1 Ne4 69. Kd5 Ng3 70. Bc4 f2 71. Kxc5 Ke5 72. b4 Ke4 73. Bd5+ Ke3 74. Bg2 Ke2 75. Kd4 Nf1 76. b5 Ne3 {Black mates.} 77. Be4 Ke1 78. Bd3 {[#]} Nc2+ $1 {[%mdl 512]} 79. Kc3 {[#]} (79. Bxc2 f1=Q) 79... Na3 $1 80. Kb4 Kd2 81. Bf1 Nc2+ 82. Kb3 Ne3 83. b6 axb6 84. Bb5 Ke1 85. Kc3 Nf5 {Accuracy: White = 78%, Black = 90%.} 0-1

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.28"]
[Round "4.4"]
[White "Sadzikowski, Daniel"]
[Black "Piorun, Kacper"]
[Result "1/2-1/2"]
[ECO "E71"]
[WhiteElo "2374"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,115,28,51,30,39,19,49,53,52,50,52,52,57,55,60,37,43,51,51,43,64,59,125,0,0,0,10,-100,0,-166,-25,-36,29,0,45,45,51,51,52,40,64,64,125,64,100,47,72,64,64,37,64,62,70,62,62,62,62,62,62,62,62,41,62,48,48,48,48,48,57,57,57,64,82,82,82,14,82,82,82,82,82,82,84,0,0,0,0,0,84,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3 c6 7. g4 {E71: King's Indian: 4 e4 d6 5 h3.} e5 8. d5 Na6 9. Nge2 {White is slightly better.} cxd5 10. cxd5 Bd7 11. Ng3 {[#]} Nc7 $146 ({Predecessor:} 11... b5 12. Bxb5 Bxb5 13. Nxb5 Qa5+ 14. Nc3 Qb4 15. Qd2 Nc5 16. O-O Rab8 17. b3 a5 {1-0 (68) Fernandes,A (2408)-Carneiro,C (2215) Lisbon 2008}) 12. Qd2 b5 13. f3 b4 14. Nce2 a5 15. h4 Na6 16. h5 Rc8 (16... Qe7 $14) 17. Bh6 ({Better is} 17. Nc1 $16 Nc5 18. g5) 17... Bxh6 $11 18. Qxh6 {Threatens to win with g5.} Qe7 19. Bh3 (19. Nc1 $11 Nc5 20. Nd3) 19... Kh8 (19... Rc2 $17) 20. Kd2 $2 (20. Qd2 $11 {and White is okay.}) 20... Ng8 (20... Nc5 $1 $19 {White must now prevent ...g5!} 21. Qe3 (21. g5 $2 Ng8 $19) 21... Bb5) 21. Qe3 g5 ({Black should play} 21... Ba4 $15 22. b3 Bb5) 22. Nc1 h6 23. Bf1 $1 {[%cal Rf1a6]} Nc5 24. Nd3 Nf6 25. Nxc5 dxc5 26. Bc4 Qd6 {[#]} (26... a4 $14) 27. Ke2 ({White should try} 27. a4 $1 $16) 27... Ne8 28. Kf2 (28. a4 $16) 28... Qb6 29. Rac1 Nd6 30. Rhd1 a4 31. Kg2 Rc7 32. Qd3 Ra8 33. Nf1 Kg7 34. Ne3 Kf8 35. Qd2 f6 36. Be2 Ke7 37. a3 Rb8 38. Rc2 Rcc8 39. Rdc1 bxa3 40. bxa3 Qa7 41. Bc4 Bb5 42. Ba2 Bd7 43. Rc3 (43. Nc4 $16) 43... Rb5 (43... Kf8 $11 {remains equal.}) 44. Nc4 $16 Nxc4 45. Bxc4 Rb6 46. R3c2 Kd6 47. Rb2 (47. Qf2 $16) 47... Rxb2 $11 48. Qxb2 {Strongly threatening Rb1.} Rb8 $1 {[%cal Rb8b2]} 49. Qc3 Qb6 {[#]} (49... Bb5 $11 {keeps the balance.}) 50. Kf2 (50. Rc2 $1 $16) 50... Qb2+ {The position is equal.} 51. Qxb2 Rxb2+ {[%mdl 4096] Endgame KRB-KRB} 52. Ke3 Bb5 53. Bxb5 Rxb5 54. Kd3 Rb3+ 55. Rc3 {Hoping for Rxb3.} Rb2 56. Rc2 Rb3+ 57. Rc3 {And now Rxb3 would win.} Rb2 58. Rc2 {Accuracy: White = 76%, Black = 71%.} 1/2-1/2

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.28"]
[Round "4.5"]
[White "Piorun, Kacper"]
[Black "Sadzikowski, Daniel"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2539"]
[BlackElo "2374"]
[Annotator "TA"]
[PlyCount "199"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,199,13,22,0,5,0,16,15,7,13,20,0,0,0,8,-14,0,-12,0,-11,0,0,21,0,29,-26,-6,-85,-64,-81,-22,-10,-19,-25,-18,-31,-15,-22,8,-65,-41,-36,-18,-22,-25,-25,-21,-20,-26,-16,-20,-17,-23,-25,0,-5,0,-43,-43,-47,-47,-51,-48,-52,0,0,0,-33,-33,-33,-33,-33,-33,-33,-27,-33,-21,-26,-21,-26,-21,-26,-21,-57,0,-26,-21,-28,-21,-28,-10,-33,-33,-33,0,-6,-6,-33,-33,-33,-33,-33,-17,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,0,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-34,-41,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. Bd2 {8.a3 is the modern continuation. C84: Closed Ruy Lopez: Unusual White 6th moves.} Bg4 9. c3 O-O 10. Re1 Na5 11. Bc2 c5 12. Bc1 Nc6 13. h3 Be6 {[#]} 14. a4 $146 ({Predecessor:} 14. d4 cxd4 15. cxd4 Nxd4 16. Nxd4 exd4 17. Qxd4 Rc8 18. Bb3 d5 19. e5 Ne4 20. Be3 {0-1 (47) Ronka,E (2281)-Sebenik,M (2498) chess.com INT 2020}) 14... h6 15. Nbd2 Re8 16. Nf1 Bf8 17. Ne3 Qd7 18. Nh2 d5 19. exd5 (19. Nhg4 $142 $1 Nxg4 20. exd5 Nxe3 21. dxe6 Rxe6 22. fxe3 (22. Bxe3 b4 $14)) 19... Nxd5 $11 20. Neg4 (20. Nxd5 $11 Qxd5 21. Qh5) 20... b4 $17 21. Bd2 Qc7 (21... f6 $17) 22. Nf3 $11 {[%cal Rg4e5]} bxc3 23. bxc3 {[%cal Rg4e5]} Bf5 24. Nh4 Bh7 25. Qf3 Nf4 (25... Rad8 {with more complications.} 26. Bb3 Nf4 27. Bxf7+ Kxf7 28. Bxf4 exf4 29. Nxh6+ gxh6 30. Qh5+ Kg7) 26. Nxe5 (26. g3 $11 Nxh3+ 27. Kg2) 26... Nxh3+ (26... Nxg2 {is more complex.} 27. Qxg2 Nxe5 28. Bf4 Rad8 29. Rac1 Qe7) 27. Qxh3 {aiming for Nc4.} Rxe5 28. Rxe5 Qxe5 29. d4 cxd4 30. Bxh7+ Kxh7 31. Qd3+ Kg8 32. Nf3 Qd5 33. cxd4 a5 34. Rc1 Rd8 {[%cal Rc6d4]} 35. Qb5 Nxd4 36. Nxd4 Qxd4 37. Bxa5 Rd5 38. Bb6 Rxb5 ({Better is} 38... Qe4 $1 $15 39. Qb3 {[#]} Rg5 $1 {[%mdl 512]}) 39. Bxd4 $15 {[%mdl 4096] Endgame KRB-KRB} Rb4 $1 {[%csl LRa4,LRd4][%mdl 64] [#] Double Attack} 40. Bc5 (40. Be3 {feels hotter.} Rxa4 41. Rc8 Ra1+ 42. Kh2 Ra5 43. Bd2) 40... Bxc5 41. Rxc5 Rxa4 {KR-KR} 42. g3 Kh7 43. Kg2 Kg6 44. f4 Ra3 45. Rb5 Rc3 46. Ra5 Rb3 47. Rc5 Rd3 48. Ra5 Rb3 49. Rc5 Kf6 50. Ra5 Rd3 51. Kf2 g6 52. Rb5 h5 53. Ra5 Ke6 54. Re5+ Kd6 55. Ra5 Rd5 56. Ra6+ Ke7 57. Kf3 Rb5 58. Kf2 Kf8 59. Kf3 Kg7 60. Rc6 Kh6 61. Rc3 f5 62. Rc8 Rb7 63. Rh8+ $1 Kg7 64. Ra8 Rb3+ 65. Kf2 Rd3 66. Rb8 Kf7 67. Rb6 Kg7 68. Rb7+ Kh6 69. Rb8 Rc3 70. Ra8 Rc7 71. Rh8+ Kg7 72. Ra8 Rc2+ 73. Kf3 Rc3+ 74. Kg2 Re3 75. Kf2 Re6 76. Ra7+ Kf6 77. Ra5 Rb6 78. Kg2 Ke6 79. Re5+ Kf7 80. Ra5 Kf6 81. Rc5 Rb4 82. Kf3 Rb2 83. Rc6+ Kg7 84. Rc7+ Kh6 85. Rc8 Rb3+ 86. Kg2 Rb6 87. Kf3 Kg7 88. Rc7+ Kf6 89. Rc5 g5 90. fxg5+ {The position is equal.} Kxg5 91. Rc4 Rb3+ 92. Kf2 Rd3 93. Ra4 Kf6 94. Rh4 Kg5 95. Ra4 Rd1 96. Rb4 Rh1 97. Ra4 Rh2+ 98. Kf3 Rd2 99. Rb4 Rd3+ 100. Kf2 {[%mdl 32768] Accuracy: White = 90%, Black = 91%. . Sensor Board Error (Ke4/e5)?} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.28"]
[Round "4.7"]
[White "Piorun, Kacper"]
[Black "Sadzikowski, Daniel"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2539"]
[BlackElo "2374"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,95,9,14,11,9,-25,-25,-42,-39,-37,-7,-30,-35,-88,-11,-23,0,6,2,-15,367,376,358,370,363,373,358,206,237,237,225,231,216,224,285,263,259,239,225,150,150,150,150,150,150,150,156,155,263,120,127,120,191,189,180,124,468,456,764,530,766,758,779,763,786,739,737,462,448,424,1042,975,851,787,3124,2976,29981,29982,29983,29984,29984,29985,29985,29986,29986,29987,29988,29989]} 1. d4 Nf6 2. Bf4 e6 3. e3 b6 4. Nf3 Be7 5. h3 O-O 6. Bd3 {A47: 1 d4 Nf6 2 Nf3 b6: Torre, London and Colle Systems.} c5 {[#]} 7. Qe2 $146 ({Predecessor:} 7. O-O Ba6 8. dxc5 bxc5 9. Bxa6 Nxa6 10. c4 Qb6 11. b3 d5 12. cxd5 exd5 13. Nc3 {½-½ (22) Agrest,E (2593)-Kazhgaleyev,M (2594) chess.com INT 2017}) 7... Nd5 8. c3 {Black has an edge.} Nxf4 9. exf4 {Black must now prevent Qe4!} cxd4 10. cxd4 (10. Qe4 g6 $16) (10. Nxd4 {seems wilder.} Bb7 11. O-O Qc7 12. g3 Nc6 13. Nf3) 10... Nc6 11. h4 (11. a3 $15) 11... f5 (11... Bb7 $17 12. Nc3 Qc7) 12. Nc3 $11 Nb4 13. Bc4 d5 14. Bb5 {aiming for a3.} Bd7 $2 {[%mdl 8192]} (14... a6 $11 {and Black has nothing to worry.} 15. Bd3 b5) 15. a3 $18 Bxb5 16. Nxb5 Na6 17. Qxe6+ Kh8 18. Kf1 (18. Ne5 $142) 18... Rf6 19. Qe2 Nc7 20. Rc1 Nxb5 21. Qxb5 Bd6 22. Ne5 (22. Qxd5 Bxf4 23. Qxd8+ Rxd8 $16) 22... Bxe5 23. fxe5 Rg6 24. f3 Rc8 25. Rc3 Rxc3 26. bxc3 $16 {[%mdl 4096] Endgame KQR-KQR} h5 27. Kf2 Qe7 28. Qb4 ({Resist} 28. Qxd5 $6 Qxa3 29. Re1 Qxc3 $14) 28... Qd8 {[#]} (28... Qf7 $16 29. Rc1 Rc6) 29. f4 (29. c4 $1 $18) 29... Rc6 30. Rh3 Rc4 {[#]} (30... a6 $16 31. a4 Kh7) 31. Qb5 $1 $18 Rc7 32. Kg1 ({White should try} 32. a4 $18) 32... Qe7 $2 {[%mdl 8192]} (32... g6 $16 {is more resistant.} 33. Re3 Kg7) 33. Qxd5 Rc8 (33... Qxa3 $142 34. Qf3 (34. Qd8+ Kh7 $18) 34... g6) 34. Qb3 b5 35. d5 Qc5+ 36. Kf1 a5 37. Rd3 b4 38. axb4 Qb5 39. Ke2 {Threatens to win with d6.} Rc4 (39... a4 $142 40. Qa3 Qc4) 40. d6 a4 41. Qc2 {d7 is the strong threat.} Qc6 42. Kd1 Rxf4 43. Qe2 {White mates.} Qc4 44. d7 Qb3+ 45. Ke1 Re4 46. d8=Q+ Kh7 47. Re3 {[%cal Re2h5]} Qb1+ 48. Qdd1 {Accuracy: White = 63%, Black = 50%.} 1-0

[Event "77th LOTTO POL-ch 2020"]
[Site "Warsaw"]
[Date "2020.07.28"]
[Round "4.7"]
[White "Sadzikowski, Daniel"]
[Black "Piorun, Kacper"]
[Result "1-0"]
[ECO "C22"]
[WhiteElo "2374"]
[BlackElo "2539"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2020.07.21"]
[EventType "k.o."]
[EventCountry "POL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,111,-20,-20,-18,-19,-12,-7,-13,-16,-18,-7,-16,16,0,16,17,10,-18,-14,0,13,38,72,77,137,127,124,112,131,125,186,191,187,185,257,256,266,262,274,272,240,256,250,236,321,325,320,307,318,329,312,315,309,315,360,368,427,408,400,385,382,381,388,384,362,275,377,357,343,48,227,249,355,343,279,289,643,618,584,485,478,426,427,384,402,352,770,539,976,945,905,923,872,868,844,843,2176,1111,8726,8316,8387,8245,29980,29981]} 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qc4 Nf6 5. Nc3 Bb4 6. Bd2 {C22: Centre Game.} O-O 7. O-O-O Re8 {With the idea ...Bxc3.} 8. f3 {The position is equal.} d6 9. a3 {[#]} Ba5 $146 ({Predecessor:} 9... Bc5 10. Qe2 h6 11. Qe1 a6 12. g4 Nh7 13. Nge2 b5 14. Nd5 Ne5 15. Qg3 c6 {1-0 (40) Xu,X (2494)-Peng,X (2383) Shenyang 2019}) 10. g4 Be6 11. Qe2 d5 12. g5 $1 {[%cal Rg5f6]} Nd7 13. exd5 Bxd5 14. Qg2 Be6 15. Nge2 Bf5 16. Ng3 Bg6 (16... Be6 $142) 17. h4 Nd4 18. Nce4 $36 {[%mdl 2048] White is on the roll.} Bxd2+ 19. Rxd2 c5 {[#]} (19... Ne5 $16) 20. h5 $1 $18 {[%cal Rh5g6]} Bxe4 21. Nxe4 Rxe4 (21... Qc7 {might work better.}) 22. fxe4 {aiming for g6.} Ne5 23. Kb1 {Hoping for c3.} Qe7 {Now ...Ndf3 and Black clings on.} 24. g6 fxg6 25. hxg6 h6 26. c3 Ndf3 27. Rd5 Rf8 28. Be2 Ng5 29. Rf1 {And now Rxf8+ would win.} Nxg6 {...Nf4 would now be nice for Black.} 30. Rxf8+ Nxf8 31. Bc4 {Threatens to win with Rd7+.} Kh8 32. e5 Ng6 33. Qd2 Nxe5 34. Rd8+ Kh7 35. Bg8+ Kg6 36. Rd6+ Kf5 {Black wants to play ...Ne4.} 37. Qc2+ Kg4 38. Qg2+ Kf4 {[#]} 39. Rd1 $2 (39. Qh2+ $1 $18 Kf5 40. Qf2+ Ngf3 41. Qxc5) 39... Nef3 $2 {Loses the game.} ({Better is} 39... Ngf3 $14) 40. Bd5 Qe3 (40... b6 $142 41. Rf1 Qe3) 41. Bxf3 Nxf3 42. Qxg7 {[%mdl 4160] Endgame Double Attack. KQR-KQN} Ke4 $2 (42... Qe4+ 43. Ka1 h5 44. Qc7+ Kg4 45. Qd7+ (45. Qxc5 h4 $18) 45... Kg3) 43. Qh7+ Ke5 44. Qe7+ Kf4 45. Qf7+ Kg3 46. Qg6+ Kf2 47. Ka1 Ke2 $2 (47... b5 48. Rh1 a5 49. Qc2+ Qe2) 48. Rh1 Nd2 49. Qg2+ Qf2 50. Qxf2+ Kxf2 51. Rxh6 {KR-KN} Ke3 52. Rh7 Nb3+ 53. Ka2 Na5 54. b4 {[%cal Bb2b4,Bb4c5][%mdl 32]} Nc4 55. Rxb7 Kd3 56. bxc5 {Accuracy: White = 88%, Black = 41%.} 1-0

