[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "1.1"]
[White "Kuzubov, Yuriy"]
[Black "Roebers, Eline"]
[Result "1-0"]
[ECO "A65"]
[WhiteElo "2644"]
[BlackElo "2129"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,65,6,18,65,50,47,54,56,60,92,77,150,141,171,177,253,178,194,191,207,209,331,311,345,317,303,325,500,460,392,321,610,389,1016,1019,1014,1011,1013,981,976,958,1067,1039,1047,1044,1027,968]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. cxd5 a6 10. a4 Re8 11. f3 Nbd7 {A65: Modern Benoni: 6 e4.} 12. Nh3 h6 13. Be3 {[#]} g5 $146 {White is slightly better.} ({Predecessor:} 13... Ne5 14. Nf2 g5 15. h4 Nh7 16. hxg5 hxg5 17. g3 f5 18. f4 Nf7 19. Bh5 Re7 20. O-O-O {½-½ (65) Vinchev,S (2492)-Stefanov,P (2288) ICCF email 2015}) 14. Nf2 Nh5 15. g3 f5 (15... Kh7 $142) 16. exf5 $16 Bxc3 17. bxc3 {aiming for Ng4.} ({Don't do} 17. Qxc3 $6 Ndf6 $16) 17... Qe7 (17... Ndf6 $142) 18. Nd1 Ne5 {[#]} 19. O-O $1 Nf6 {[#]} 20. g4 $1 b5 (20... Bd7 {was called for.} 21. c4 b6) 21. axb5 $18 Bb7 {intending ...axb5.} 22. bxa6 Bxd5 {[#]} 23. h4 $1 Nc4 (23... Bc6 {was necessary.} 24. hxg5 hxg5) (23... gxh4 24. Bxh6) 24. Bxc4 $1 Bxc4 25. Re1 Nd5 $2 (25... Nd7 26. hxg5 Ne5) 26. Bf2 Qg7 $2 (26... Qxe1+ 27. Bxe1 Re2) 27. Rxe8+ {White is clearly winning.} Rxe8 28. a7 Ra8 29. Nb2 Bb3 30. Ra3 Qb7 31. hxg5 Rxa7 32. Rxa7 Qxa7 33. gxh6 {White took control after the opening. Accuracy: White = 85%, Black = 32%.} 1-0

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "1.2"]
[White "Zwirs, Jasper"]
[Black "Solodovnichenko, Yuri"]
[Result "0-1"]
[ECO "B44"]
[WhiteElo "2105"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,74,-8,-4,-52,8,7,6,15,12,9,8,14,5,-14,52,58,79,63,77,72,84,61,110,2,22,6,14,-30,-46,-88,-97,-231,-247,-242,-260,-250,-242,-269,-252,-244,-245,-391,-384,-385,-374,-355,-387,-384,-381,-478,-481,-478,-472,-483,-481,-1022,-1178,-1272,-1273,-1170,-1133,-1064,-1035]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Be3 Nf6 6. Bd3 d5 7. Nxc6 bxc6 8. e5 {B44: Sicilian: Taimanov: 5 Nb5.} d4 ({Better is} 8... Nd7 $1 $15) 9. Bd2 $11 Nd7 10. Qe2 {The position is equal.} Qb6 11. b3 {[%cal Bb2b3,Bb3b4,Bb4b5][%mdl 32] [#]} a5 $146 ({Predecessor:} 11... Nc5 12. Bc4 Ba6 13. O-O Bxc4 14. Qxc4 Rd8 15. Bf4 Be7 16. Qe2 O-O 17. Nd2 Qb5 {0-1 (87) Devyatkina,R-Karavaeva,N (2006) Izhevsk 2010}) 12. O-O a4 13. b4 a3 (13... Bxb4 $11 14. Bxb4 Qxb4) 14. c3 $14 c5 {[%cal Rc5b4]} 15. b5 Bb7 16. c4 Qc7 17. f4 g5 18. f5 (18. fxg5 $16 {next Bf4 is good for White.} Qxe5 19. Qf2) 18... Qxe5 $11 19. fxe6 Qxe6 20. Qh5 {[#] Strongly threatening Bf5.} ({Don't go for} 20. Bxg5 $2 Rg8 $19) 20... Ne5 21. Bf5 Qh6 $40 {[%mdl 128] Black has strong attack.} ({Worse is} 21... Qxc4 22. Re1 $16) 22. Qe2 {White does not recover from this.} (22. Qxh6 $17 Bxh6 23. Re1) 22... Bd6 $19 23. Be4 Bxe4 24. Qxe4 O-O 25. Rf5 Ng6 26. g3 {[#]} Qh5 $1 27. Qf3 (27. Qd5 {was necessary.} Rae8 28. Rf2 (28. Qxd6 $2 Re2 $19)) 27... Qxf3 {[%mdl 64] Overworked Piece} 28. Rxf3 Ne5 $1 {[%csl LRc4,LRf3]} 29. Rb3 Nxc4 30. Bxg5 Be5 31. Nd2 Nxd2 {Black is clearly winning.} 32. Bxd2 c4 {[%cal Bc5c4,Bc4c3][%mdl 32]} 33. Rb4 c3 34. Bf4 (34. Rd1 $142 cxd2 35. Rxd2) 34... Bxf4 35. gxf4 d3 36. Kf2 Rfe8 37. Rd4 Rad8 {Accuracy: White = 49%, Black = 85%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "1.3"]
[White "Schoppen, Casper"]
[Black "Marel, Bert van der"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2489"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,50,6,6,0,0,13,25,26,43,35,58,50,61,63,65,56,54,61,72,78,74,65,97,92,131,102,131,118,150,154,266,265,262,260,673,709,29998,29999,29999]} 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4 Bc5 5. Nxe5 Nxe5 6. d4 Bb4 7. dxe5 Nxe4 $1 8. Qf3 {A28: English Opening: Four Knights Variation.} Nxc3 {8...Nxc3 is better than 8...d5.} 9. bxc3 Be7 10. Qg3 {White has an edge.} Kf8 {[#]} 11. Bf4 $146 ({Predecessor:} 11. Be2 b6 12. Bf4 Ba6 13. Rd1 Qe8 14. O-O Rd8 15. h4 h5 16. Rfe1 Bc5 17. Bg5 {1-0 (27) Liu,Z (2380)-Kukurin,L (2042) Zagreb 2019}) 11... Bh4 12. Qf3 Bg5 13. Rd1 $36 {[%mdl 2048] White has the initiative.} Bxf4 14. Qxf4 Qe7 15. Be2 h5 16. O-O Rh6 17. Rfe1 a5 18. Bf3 Raa6 19. h4 Rab6 20. Rd5 Ra6 21. Re3 Rhe6 (21... Kg8 $16 22. g3 a4) 22. Bxh5 $18 Rh6 {[#]} 23. g4 $1 Rh8 $2 {[#]} (23... Rhe6) 24. e6 $1 {[%cal Re6d7][%mdl 64] Discovered Attack} dxe6 {[#]} 25. Rd8+ $1 {[%mdl 576] Deflection} Qxd8 26. Qxf7# {White took control after the opening. Accuracy: White = 93%, Black = 46%.} 1-0

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "1.4"]
[White "Hagendijk, Klaas"]
[Black "Pijpers, Arthur"]
[Result "0-1"]
[ECO "B52"]
[WhiteElo "1994"]
[BlackElo "2470"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,84,0,0,14,-11,0,-11,-10,-29,-15,-36,-3,0,0,11,23,-7,0,0,8,7,35,39,38,24,30,27,47,43,54,-7,0,-7,40,8,8,23,12,26,41,-10,-10,-14,-18,-15,0,-10,10,0,99,96,91,94,97,115,107,0,0,0,4,-105,0,-784,-768,-12827,-6620,-29992,-29993]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nf6 6. Re1 Nc6 7. d4 cxd4 8. Nxd4 g6 9. c4 {The main line 9.c4 scores better than 9.Nxc6.} Bg7 10. Nc3 O-O {B52: Sicilian: Moscow Variation with 3...Bd7.} 11. f3 Rac8 12. Nde2 a6 {[#] The position is equal.} 13. Na4 $146 ({Predecessor:} 13. Be3 Ne5 14. b3 b5 15. cxb5 axb5 16. Qd2 b4 17. Na4 Nc4 18. Qd3 Nxe3 19. Qxe3 {0-1 (36) Munoz Pantoja,M (2495)-Alsina Leal,D (2535) Catalunya 2012}) 13... Qc7 14. Be3 $1 Nd7 15. Rc1 Rfd8 16. Nec3 e6 17. b3 Nc5 18. Qe2 Qe7 19. Red1 h5 20. Nb6 {Strongly threatening Ncd5!} Rb8 21. Nca4 Ne5 22. Rc2 (22. Qd2 {with more complications.} Ned3 23. Rb1 Ne5 24. h3 Nc6 25. Kh1) 22... Nxa4 23. Nxa4 b5 24. Nb2 (24. cxb5 $14 axb5 25. Nb6) 24... Nc6 {White must now prevent ...Nb4.} 25. Nd3 h4 26. Nf2 Nb4 27. Rcc1 {Threatens to win with a3.} bxc4 28. Rxc4 {[#] aiming for a3.} a5 29. a3 (29. Bf4 $14) 29... d5 $11 30. Bc5 Qb7 31. Rcc1 Na6 32. Bd4 e5 33. Bc3 d4 (33... dxe4 $11 34. Rxd8+ (34. Nxe4 Qb6+ 35. Kh1 Rxd1+ 36. Qxd1 Nc5 $11) (34. Qxe4 Rxd1+ 35. Rxd1 Qxb3 $15) 34... Rxd8) 34. Bxa5 $16 Rdc8 35. b4 Bh6 36. Rxc8+ Rxc8 37. Nd3 (37. Ng4 $16 Bg7 38. a4) 37... Be3+ $11 38. Kf1 Qb5 39. g3 (39. Ne1 $11 Qb7 40. Ra1) 39... h3 (39... Qa4 $17 40. Ne1 (40. Nxe5 $2 Rc2 $19) 40... hxg3 41. hxg3 (41. Qxa6 $2 Rc2 $19) 41... Kg7) 40. Nxe5 $2 {[%mdl 8192] [#]} (40. Ne1 $11 Qb7 41. Ra1) 40... Qxe5 $19 41. Qxa6 Rc2 42. Qd3 Rxh2 {Accuracy: White = 56%, Black = 83%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "2.1"]
[White "Grooten, Herman"]
[Black "Kuzubov, Yuriy"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "2251"]
[BlackElo "2644"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,58,21,21,24,18,10,14,10,28,28,22,13,5,8,14,0,0,2,4,5,5,0,0,0,0,0,0,-41,-28,-92,-87,-76,-9,-17,-13,-476,-476,-476,-473,-29994,-29995]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Qd2 Qa5 9. Rc1 O-O 10. Nf3 Rd8 11. Be2 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} cxd4 $1 {[%mdl 4] now scores much better than the old 11...Nc6. Played by Vladislav Artemiev in January 2020.} 12. cxd4 Qxd2+ 13. Bxd2 {The position is equal.} Bg4 14. d5 e6 15. Bc4 exd5 16. Bxd5 Nc6 17. Ng5 Ne5 {[#] Hoping for ...Nd3+.} 18. Rc7 $146 ({Predecessor:} 18. O-O h6 19. f3 Bd7 20. f4 Bc6 21. fxe5 Bxd5 22. exd5 hxg5 23. Bxg5 Rxd5 24. Bf6 Bxf6 25. Rxf6 {1-0 (44) Grigoryan,A (2404)-Gupta,A (2481) Yerevan 2006}) 18... Rac8 19. Rxc8 Rxc8 20. f3 Bd7 21. f4 h6 {And now ...Nd3+ would win.} 22. fxe5 hxg5 23. Ke2 Bxe5 24. g3 (24. Bxg5 $11 b6 25. g3) 24... Bb5+ $17 25. Kf3 b6 (25... Rc2 $17 26. Bxg5 Bd4) 26. Bxg5 $11 Rc3+ 27. Kg4 $2 {[%mdl 8192]} (27. Be3 $1 $11) 27... Bd7+ $19 28. Kh4 Kg7 {( -> ...Rc8)} 29. Bd2 {[#]} (29. Rc1 $19 f6 30. Rxc3 fxg5+ 31. Kxg5 Bxc3 32. Kf4) 29... Rc8 {Accuracy: White = 54%, Black = 90%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "2.2"]
[White "Solodovnichenko, Yuri"]
[Black "Tiggelman, Rene"]
[Result "1/2-1/2"]
[ECO "B78"]
[WhiteElo "2567"]
[BlackElo "2188"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 30,103,25,27,14,0,22,5,31,33,71,65,97,15,40,14,54,0,50,60,47,41,26,18,181,177,516,500,500,370,374,370,282,-22,-27,-39,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,0,0,0,0,0,-8,0,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Bc4 O-O 9. Bb3 Bd7 10. h4 h5 11. Qd2 Rc8 12. O-O-O Ne5 13. Bh6 Nc4 14. Bxc4 Rxc4 15. Bxg7 Kxg7 16. Kb1 Qa5 {B78: Sicilian Dragon: Yugoslav Attack, 9 Bc4 Bd7 10 0-0-0 Rc8.} 17. Nb3 Qc7 18. g4 hxg4 19. h5 $1 {[#]} g5 $146 (19... Nxh5 $2 20. Rxh5 $1 {[%mdl 512]} e6 21. Qh6+ Kf6 22. Qxf8 $18) (19... gxh5 20. Qg5+ Kh8 21. Rxh5+ Nxh5 22. Qxh5+ Kg7 23. Qg5+ Kh8 24. Rh1#) ({Predecessor:} 19... gxf3 20. Nd4 Rxc3 21. hxg6 fxg6 22. bxc3 Qb6+ 23. Kc1 Qa5 24. Nxf3 Qxa2 25. Qh6+ Kf7 {0-1 (62) Cayford,R (2525)-Prizant,M (2515) ICCF corr 1996}) 20. Qxg5+ Kh7 21. Rd3 ({White should try} 21. fxg4 $16 Rg8 22. Qe3 Rxg4 23. Nd2) 21... Rg8 $11 22. Qd2 b5 23. Nd4 (23. fxg4 $14 Rxg4 24. Rf3) 23... Qc5 24. b3 $36 {[%cal Bb2b3,Bb3b4][%mdl 2080] White is pushing.} Rxd4 $1 25. Rxd4 {Black must now prevent Nd5.} gxf3 {Hoping for ...f2.} 26. Rf1 {aiming for Nd5.} Rg3 $2 (26... b4 $1 $11 27. Nd5 {[%mdl 64] Double Attack} Rg2) 27. Nd5 $18 Ng4 $2 {[#]} (27... Bh3 {is more resistant.} 28. Rc1 Be6) 28. b4 $1 {[%cal Rb4c5]} Qc8 29. Nxe7 Qh8 30. Rxd6 Be6 31. Nf5 $2 (31. Rxe6 $18 fxe6 32. Qf4) 31... Rg2 $1 $11 {[%cal Rg2d2]} 32. Qd4 $1 Qxd4 (32... Bxf5 $5 33. Qxh8+ (33. exf5 Qxd4 34. Rxd4 Nh2 $15) 33... Kxh8 34. Rxf3 (34. exf5 Nh2 $11) 34... Be6 $11) 33. Nxd4 {The position is equal.} (33. Rxd4 $2 {too greedy.} f2 $19) 33... Ne3 $1 {[%cal Re3f1]} 34. Rc1 ({But not} 34. Rxe6 $2 Nxf1 35. Re7 Nd2+ 36. Kb2 f2 $19) ({Of course not} 34. Rxf3 Nc4 $17) 34... f2 35. Nxe6 fxe6 36. Rxe6 {[%mdl 4096] Endgame Strongly threatening Rf6. KRR-KRN} Rg1 {( -> ...Rxc1+)} 37. Rf6 $1 {[%cal Rf6f2]} f1=Q 38. Rfxf1 Rxf1 39. Rxf1 Nxf1 {KN-KP} 40. Kb2 Nd2 41. Kc3 Nf3 42. Kd3 Kh6 43. Ke3 Ne1 44. c3 Kxh5 45. Kd4 Kg6 {White should prevent ...Nc2+.} 46. Kc5 a6 47. e5 Kf7 48. c4 Nd3+ {[%mdl 64] Double Attack} 49. Kd4 Nxb4 {And now ...Nc6+ would win.} 50. cxb5 axb5 {[#]} 51. Kc5 $1 {[%mdl 576] Double Attack} Nxa2 52. Kxb5 {Accuracy: White = 78%, Black = 69%.} 1/2-1/2

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "2.3"]
[White "Honkoop, Gilian"]
[Black "Schoppen, Casper"]
[Result "0-1"]
[ECO "E03"]
[WhiteElo "2192"]
[BlackElo "2489"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,76,-27,-31,-35,-31,-32,-42,-37,-46,-32,-55,-38,-67,-35,-70,-38,-31,-38,-43,-12,-12,-9,-9,-9,-9,-3,-5,0,0,24,-6,8,10,17,0,79,84,96,89,81,80,82,2,6,0,8,9,9,9,11,-223,-221,-458,-468,-513,-514,-517,-499]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 dxc4 5. Qa4+ Nbd7 6. Bg2 a6 7. Qxc4 b5 8. Qc2 Bb7 9. O-O c5 10. a4 cxd4 11. Nxd4 Bxg2 {E03: Open Catalan: 5 Qa4+ Nbd7 6 Qxc4.} 12. Kxg2 Rc8 13. Qd1 b4 {Black is slightly better. 13...Qb6 might become the main line.} 14. Nd2 Be7 15. N2b3 O-O {[#]} 16. Re1 $146 ({Predecessor:} 16. e3 Nc5 17. Qf3 e5 18. Nxc5 Bxc5 19. Nb3 e4 20. Qe2 Qd5 21. Qd1 {1-0 (67) Brazdzionis,A (2252)-Haavamae,H (2185) Liepaja 2018}) 16... Nc5 17. f3 Qb6 18. e4 Rfd8 {Strongly threatening ...Nxb3.} 19. Qe2 $1 Nxb3 (19... Qc7 $5 {[%cal Rc5b3]} 20. Nxc5 Bxc5 $11) 20. Nxb3 Qc6 21. Be3 Qc2 22. Nd4 Qxe2+ 23. Rxe2 Nd7 24. f4 Nc5 25. Kf3 f6 26. Rc1 b3 $1 27. Rc3 Kf7 {[#]} (27... Nxa4 $11 28. Rxc8 Rxc8) 28. a5 $1 $16 h5 29. Nxb3 Na4 30. Rcc2 e5 31. Red2 (31. Nc1 $16) 31... Rxd2 $11 32. Rxd2 Rc7 33. fxe5 fxe5 34. Rd5 Nxb2 {White must now prevent ...Rc3.} 35. Rxe5 $2 {Now White is beyond hope.} (35. Nc5 $11) 35... Rc3 $19 {...Nc4 is the strong threat.} 36. Nd4 $2 {[#]} (36. Ke2 {was worth a try.} Rxb3 37. Rxh5) 36... Rxe3+ $1 {[%mdl 576] Decoy. Black is clearly winning.} 37. Kxe3 Nc4+ 38. Kf4 {[#]} Bd6 $1 {[%mdl 64] Pin. Accuracy: White = 66%, Black = 86%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "2.4"]
[White "Pijpers, Arthur"]
[Black "Roorda, Thijs"]
[Result "1-0"]
[ECO "B03"]
[WhiteElo "2470"]
[BlackElo "2112"]
[Annotator "TA"]
[PlyCount "41"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,41,74,37,4,6,0,8,6,-13,-8,12,10,78,81,94,95,95,92,156,138,154,153,135,133,158,125,266,229,633,633,628,634,797,756]} 1. e4 Nf6 2. e5 Nd5 3. d4 Nb6 4. Nf3 d5 5. Bd3 Bg4 6. Nbd2 {B03: Alekhine's Defence: Four Pawns Attack.} e6 $1 7. h3 Bh5 $1 8. Nb3 {The position is equal.} N8d7 {[#]} 9. O-O $146 ({Predecessor:} 9. g4 Bg6 10. Bg5 Be7 11. h4 Nc4 12. Bxc4 dxc4 13. Nbd2 Bxg5 14. hxg5 Nb6 15. Qe2 {0-1 (31) Chovan,M (2256)-Gazik,V (2431) Slovakia 2015}) 9... Be7 10. Be3 f6 (10... Rc8 $11 {remains equal.}) 11. exf6 $16 Bxf6 12. g4 $36 {[%mdl 2048] White is really pushing.} Bf7 13. c3 g5 {[#]} (13... a5 $142) 14. Na5 $1 Rb8 15. Qd2 {[%cal Rf3g5]} h6 16. Rae1 c6 17. h4 {[%cal Rh4g5]} Qc7 (17... Rg8 $16 18. hxg5 hxg5) 18. Kg2 $18 h5 $2 (18... Na4) 19. Nxg5 {White is clearly winning.} Bxg5 20. hxg5 hxg4 {[%csl Gh8][%cal Rc7h2] [#]} 21. Bf4 {[%mdl 64] Skewer. Black did not feel at home in the position after the opening. Accuracy: White = 86%, Black = 41%.} 1-0

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "3.1"]
[White "Kuzubov, Yuriy"]
[Black "Schoorl, Rob"]
[Result "1-0"]
[ECO "E63"]
[WhiteElo "2644"]
[BlackElo "2275"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,83,24,36,16,33,24,4,6,29,22,24,4,28,30,33,29,9,-26,37,43,57,53,70,51,62,52,82,87,106,42,85,83,73,78,92,84,127,120,118,123,129,123,114,110,95,108,114,89,115,112,112,112,112,89,99,94,94,91,115,88,134,133,234,193,302,288,1272,1260,1240,1232]} 1. c4 g6 2. g3 Bg7 3. Bg2 Nf6 4. Nf3 d6 5. d4 O-O 6. O-O Nc6 7. Nc3 a6 8. Bg5 {8.b3 is the recent fashion.} h6 9. Bf4 {E63: King's Indian: Fianchetto: Panno Variation with 7...a6.} Rb8 10. Qc1 $5 {[%mdl 4] Leaves trodden paths.} Kh7 11. Rd1 {[#] The position is equal.} Bf5 $146 ({Predecessor:} 11... Bd7 12. Nd5 Ne4 13. Qc2 f5 14. Be3 e6 15. Nc3 Nxc3 16. Qxc3 e5 17. d5 Ne7 {0-1 (70) Baranowski,T (2426)-Efendiyev,E (2530) ICCF email 2012}) 12. d5 Na5 13. Nd4 Bd7 14. c5 Nh5 15. Be3 $36 {[%mdl 2048] White fights for an advantage.} Nc4 16. b4 Nxe3 (16... e5 $11 17. dxe6 fxe6) 17. Qxe3 $14 Re8 18. Rac1 Nf6 19. a4 e5 20. dxe6 $1 Bxe6 21. Nxe6 Rxe6 22. Qd2 (22. Qf4 $16) 22... Qe7 23. Bd5 Re5 24. cxd6 cxd6 25. e3 h5 26. Bg2 Rd8 27. Nd5 Nxd5 28. Bxd5 Rd7 29. b5 axb5 30. axb5 Qd8 31. Qd4 Qa5 32. Qc4 Ree7 33. Qb3 Qb6 34. Rc4 {[%cal Bc1c4,Bc4f4,Bf4f6][%mdl 32]} Be5 35. Rdc1 Kg7 36. Kg2 Bf6 37. h4 Re5 38. Rf4 Rde7 (38... Rc7 $16 39. Rxc7 Qxc7) 39. Rc8 Rd7 (39... Rc7 {keeps fighting.} 40. Ra8 Ree7 41. Rxf6 Kxf6) 40. e4 $18 Qd4 $2 (40... Rxd5 41. Qxd5 Qd4 42. Qxd4 Bxd4) 41. Qf3 Ree7 {[#]} 42. Rxf6 $1 {[%mdl 512] Accuracy: White = 88%, Black = 62%.} 1-0

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "3.2"]
[White "Schoppen, Casper"]
[Black "Mollema, Thomas"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "2489"]
[BlackElo "2251"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,88,39,42,31,61,62,61,59,72,52,53,34,98,79,106,102,126,122,133,101,135,114,134,88,94,93,91,92,135,87,93,96,143,127,153,153,298,293,272,300,438,179,169,120,118,128,141,86,101,107,97,84,81,8,990,991,1293,1293,1254,1240,29985,29986,29986,29987,29988,29989,29989,29990,29990,29991,29991,29988,29992,29993,29999]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Qc7 6. O-O Nf6 7. Qe2 d6 8. c4 Nbd7 9. Nc3 {B42: Sicilian: Kan Variation: 5 Bd3.} b6 10. f4 Bb7 11. Bd2 {White is slightly better.} Be7 12. f5 e5 13. Nc2 {[#]} h5 $146 (13... O-O $14) ({Predecessor:} 13... Nc5 14. Rac1 Nxd3 15. Qxd3 Rc8 16. b3 O-O 17. Kh1 Qb8 18. Bg5 b5 19. Ne3 bxc4 20. Nxc4 {1-0 (33) Battulga,N (2404)-Khurelchuluun,B (2038) Tsetserleg 2018}) 14. b4 Bc6 15. Ne3 Qb7 {[%cal Rf6e4]} 16. Ned5 Bd8 17. Kh1 Bxd5 18. Nxd5 h4 19. Rf3 a5 20. bxa5 bxa5 21. Rb1 Qc6 22. Rh3 Nc5 23. Bc2 Nfd7 24. g4 Rc8 25. g5 Na4 (25... Rb8 $16 {was called for.} 26. Rxb8 Nxb8) 26. Qg4 $18 Nab6 {intending ...Nxd5.} 27. Bd3 ({Worse is} 27. Rxh4 Rxh4 28. Qxh4 Nxd5 $11) 27... Qa4 (27... Rb8 $142 28. f6 (28. Bxa5 Nxd5 29. Rxb8 Nxb8 $16) 28... g6 29. Rxh4 Rf8) 28. g6 (28. Nc3 $142 Qc6 29. f6) 28... Nxd5 29. gxf7+ ({Resist} 29. exd5 f6 $16) 29... Kf8 {Threatens to win with ...Nf4.} 30. cxd5 {Strongly threatening f6!} Bf6 31. Rg1 (31. Bg5 $142) 31... Qxa2 $16 32. Bg5 {Black must now prevent Bxf6.} Ke7 33. Bb5 {Hoping for Bxd7.} Rhf8 34. Rxh4 (34. Bxh4 $16 {And now Qxg7 would win.} Qd2 35. Be1) 34... Rxf7 $2 {[%mdl 8192] Black cannot hold the game after this.} (34... Rb8 $11 35. Bxd7 Kxd7) 35. Rh7 $18 Rcf8 36. Bxd7 $1 {[%mdl 64] Overworked Piece} Kxd7 37. Bxf6 gxf6 38. Rxf7+ $1 {[%mdl 64] Overworked Piece. White mates.} Rxf7 {[%mdl 4096] Endgame KQR-KQR} 39. Qg8 $1 Re7 40. Rc1 {[%csl Gc1][%cal Rg8c8]} Re8 {[#]} 41. Qg1 $1 Re7 {[#]} 42. Qa7+ $1 Ke8 43. Rc8+ Kf7 44. Qg1 {[%csl Gc8][%cal Rg1g8]} a4 45. Qg8# {Accuracy: White = 77%, Black = 51%.} 1-0

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "3.3"]
[White "Klapwijk, Bram"]
[Black "Pijpers, Arthur"]
[Result "0-1"]
[ECO "B78"]
[WhiteElo "2172"]
[BlackElo "2470"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,115,28,28,0,0,0,0,0,18,0,34,52,56,-19,-25,0,9,0,0,0,0,0,0,0,48,56,50,50,54,-114,-117,-140,-149,-146,-126,-118,-116,-134,-126,-137,-143,-161,-155,-146,-93,-141,-102,-120,-131,-108,-124,-106,-51,-104,-101,-224,-224,-211,-213,-226,-227,-219,-175,-236,-235,-311,-311,-580,-311,-311,-97,-12795,-10040,-6143,-6553,-6079,-5097,-12804,-5443,-29984,-29985,-29989,-29990,-29995,-29992,-29996,-29991,-29995,-29996,-29999]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Bc4 O-O 8. f3 Nc6 {[%cal Bb8c6,Bc6e5,Be5c4][%mdl 32]} 9. Bb3 Bd7 10. h4 h5 11. Qd2 Rc8 12. O-O-O Ne5 13. Bg5 Nc4 14. Qe2 Na5 15. Kb1 {B78: Sicilian Dragon: Yugoslav Attack, 9 Bc4 Bd7 10 0-0-0 Rc8.} Rxc3 16. bxc3 Qb6 {[#]} 17. Be3 $146 {The position is equal.} ({Predecessor:} 17. g4 e5 18. Bxf6 Bxf6 19. gxh5 exd4 20. cxd4 Nxb3 21. axb3 Bxd4 22. hxg6 Be6 23. Qd2 {½-½ (34) Johansson,J (1874)-Overgaard,J (1983) ICCF email 2017}) 17... Qc7 $1 18. Qd3 b5 19. g4 ({Inferior is} 19. Nxb5 Bxb5 20. Qxb5 Nxe4 $17) 19... Nc4 20. Bg5 (20. gxh5 $14 Nxh5 21. Bxc4 bxc4 22. Qd2) 20... hxg4 $11 21. h5 {Threatens to win with Bxf6.} Nxh5 22. fxg4 Ne5 {[%mdl 64] Double Attack} 23. Qd2 ({Of course not} 23. Nxb5 Qb8 $17) 23... Bxg4 24. Rdg1 Rc8 25. Rh4 $1 Qxc3 26. Qxc3 Rxc3 27. Bxe7 Bd7 28. Rf1 $2 (28. Bxd6 $14 {stays ahead.} Nc4 29. Bb4 Nd2+ 30. Kc1 Nxb3+ 31. Nxb3) 28... Nc4 $17 29. Bxc4 Rxc4 30. Nf3 Bc6 {...Ng3 is the strong threat.} 31. Bxd6 Bxe4 32. Rh2 {[#]} Nf6 $1 33. Ne5 Rd4 34. Bc5 Rd5 35. Be7 Bf5 (35... Nh5 $142 36. Ng4 f5) 36. Bxf6 Bxf6 37. Ng4 Bg5 38. Nh6+ Bxh6 $1 39. Rxh6 {[%mdl 4096] Endgame KRR-KRB} Rd2 ({Better is} 39... Kg7 $17 40. Rh2 g5) 40. Rc1 ({White should try} 40. Rh4 $15) 40... Kg7 41. Rhh1 {[#]} (41. Rh4 $17) 41... Be4 $1 $19 42. Rhg1 f5 43. Kb2 Kf6 44. Kc3 Rh2 45. Kb4 (45. Kd4 $142) 45... Rxc2 46. Rxc2 Bxc2 47. Kxb5 $2 {KR-KB} (47. Kc3 {was the only defense.} Be4 48. Kd4) 47... f4 48. Kc4 Ke5 $2 (48... Bf5 $19 {Strongly threatening ...g5.} 49. Kc3 g5) 49. Re1+ $2 {[%mdl 8192]} (49. Kc3 $17 Be4 50. Kd2) 49... Be4 50. Kc3 f3 51. Kd2 Kf4 52. Rd1 g5 53. Ke1 g4 {Black mates.} 54. Rd7 Ke3 55. a4 g3 56. Kf1 Bd3+ 57. Kg1 f2+ 58. Kh1 f1=Q# {Accuracy: White = 54%, Black = 79%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "3.4"]
[White "Ercan, Selman"]
[Black "Lombaers, Peter"]
[Result "0-1"]
[ECO "D70"]
[WhiteElo "2094"]
[BlackElo "2383"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,60,36,29,41,35,35,39,57,25,53,-28,-11,-14,-6,0,0,0,0,-39,-91,-148,-127,-229,-220,-343,-347,-329,-345,-335,-333,-755,-712,-707,-611,-1290,-1283,-1264,-1124,-29985,-29985,-29995,-29987,-29997,-29998,-29998,-29999]} 1. d4 Nf6 2. c4 g6 3. f3 d5 4. cxd5 Nxd5 5. e4 Nb6 6. Nc3 Bg7 7. Be3 O-O 8. Qd2 Nc6 9. O-O-O Qd6 {D70: Grünfeld: Unusual White 3rd moves (met by ...d5).} 10. Nb5 Qd7 11. Kb1 a6 {White is slightly better.} 12. Na3 Rd8 {[%cal Rc6d4]} 13. d5 (13. Nc2 $14) 13... Qe8 $11 {[#]} 14. Qe1 $146 ({Predecessor:} 14. Ne2 e6 15. Bg5 f6 16. Bf4 Qf7 17. Nc3 exd5 18. exd5 Nb4 19. d6 Be6 20. b3 {0-1 (34) Siebrecht,S (2464)-Wagner,D (2484) Verden/Aller 2014}) 14... Na4 15. dxc6 {aiming for Rxd8.} Bxb2 {Hoping for ...Rxd1+.} 16. Rxd8 Qxd8 17. Nc4 Bc3 {[%mdl 1024] Black has compensation.} 18. Bd2 ({White should try} 18. Qe2 b5 19. Qd3 Qxd3+ 20. Bxd3 bxc4 21. Bxc4) 18... Bg7 $17 19. Kc2 (19. Qe3 $17 {might work better.} b5 20. Na5) 19... Be6 $19 {...b5 is the strong threat.} 20. Qe3 (20. cxb7 {is a better defense.} Rb8 21. Bc1 (21. Qb1 $2 Qd7 $19)) 20... b5 21. Na5 {[#]} Qd6 $1 ({Worse is} 21... Bxa2 22. Bb4 $11) 22. Ne2 Rd8 ({Not} 22... Bxa2 23. Nc3 $17) 23. Nc1 $2 (23. a3 Bb2 24. Nf4) 23... Bd4 24. Qd3 Nb2 25. Qe2 Qc5+ 26. Kb1 Qa3 {Threatens to win with ...Na4.} 27. Ncb3 Na4 {[%csl Ga4,Gd4][%cal Ra3b2] Black mates.} 28. Be1 Be5 29. Qc2 {[#]} Rd1+ $1 {[%mdl 576] Double Attack} 30. Nc1 {[#]} (30. Qxd1 Qb2#) 30... Bxa2+ $1 {[%mdl 576] Remove Defender, Back Rank. White did not feel at home in the position after the opening. Accuracy: White = 39%, Black = 100%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "4.1"]
[White "Pijpers, Arthur"]
[Black "Kuzubov, Yuriy"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2470"]
[BlackElo "2644"]
[Annotator "TA"]
[PlyCount "35"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,25,50,28,64,64]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Bf5 8. Re1 Nc6 9. Nbd2 Nxd2 10. Qxd2 Bxd3 11. Qxd3 O-O 12. Bf4 a6 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} 13. Re2 {[#]} {Predecessor:} Qd7 $146 14. Rae1 Rae8 15. c3 Bd8 16. Rxe8 Rxe8 17. Rxe8+ Qxe8 18. Qf5 {½-½ (18) Ljubojevic,L (2605)-Petrosian,T (2585) Tilburg 1981} 1/2-1/2

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "4.2"]
[White "Solodovnichenko, Yuri"]
[Black "Albers, Sasa"]
[Result "1-0"]
[ECO "B11"]
[WhiteElo "2567"]
[BlackElo "2114"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,47,5,26,26,28,15,13,9,8,0,31,24,30,31,41,33,57,62,59,44,57,59,95,91,84,83,88,83,107,110,127,107,183,127,232,228,430,435]} 1. e4 c6 2. Nf3 d5 3. Nc3 Bg4 4. h3 Bxf3 5. Qxf3 e6 6. d4 dxe4 7. Qxe4 {7.Nxe4 is the modern continuation. B11: Caro-Kann: Two Knights Variation.} Nf6 8. Qd3 Be7 9. Be2 {The position is equal.} O-O 10. O-O Na6 {[%cal Bb8a6,Ba6c7,Bc7d5][%mdl 32]} 11. a3 {[#]} Nc7 $146 ({Predecessor:} 11... c5 12. Be3 Rc8 13. dxc5 Qxd3 14. Bxd3 Nxc5 15. Be2 a6 16. Rfd1 b5 17. Bf3 h6 {0-1 (59) Mons,L (2462)-Rozentalis,E (2553) Austria 2015}) 12. Bf3 Ncd5 13. Ne2 $36 {[%mdl 2048] White has some pressure.} Qd7 14. c4 Nb6 15. Rd1 Rfd8 16. Bf4 Qe8 17. Qb3 Rd7 18. a4 {[%cal Ba3a4,Ba4a5][%mdl 32]} Nc8 19. a5 {[#] a6 is the strong threat.} a6 20. Nc3 Qd8 21. Be5 Ne8 (21... Bd6 $16 {was necessary.}) 22. Na4 ({White should try} 22. d5 $18 exd5 23. cxd5) 22... f6 (22... Bd6 $16 23. g3 h6) 23. Bg3 $18 {Black must now prevent d5.} g6 $2 {[#]} (23... Bd6 {is a better defense.} 24. Bxd6 Ncxd6) 24. d5 {Accuracy: White = 95%, Black = 59%.} 1-0

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "4.3"]
[White "Van der Werf, Mark"]
[Black "Ratsma, Midas"]
[Result "1-0"]
[ECO "D47"]
[WhiteElo "2382"]
[BlackElo "2253"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,87,9,-2,80,9,25,28,39,49,60,73,65,66,41,54,70,75,101,39,45,38,44,43,130,73,87,88,88,115,136,114,116,99,114,100,204,197,242,235,235,231,237,237,250,247,297,245,247,229,250,242,275,218,245,215,269,265,248,246,259,244,494,491,479,473,657,644,626,618,2617,2658]} 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bd6 9. a3 O-O 10. O-O e5 {[#] D47: Semi-Slav: Meran System.} (10... Bb7 $11 {remains equal.}) 11. Bd2 $146 ({Better is} 11. Ne4 $1 $16 {[%cal Re4d6]} Nxe4 12. Bxe4) ({Predecessor:} 11. Ne4 Nxe4 12. Bxe4 Bb7 13. dxe5 Nxe5 14. Nxe5 Bxe5 15. Bxh7+ Kxh7 16. Qh5+ Kg8 17. Qxe5 Qd5 18. Qxd5 cxd5 {1-0 (77) Malakhatko,V (2507)-Rajdeep,S (2298) Mumbai 2017}) 11... exd4 12. exd4 a6 {White has an edge.} 13. Ne4 Nxe4 14. Bxe4 Bb7 15. Rc1 Rc8 16. Qc2 Nf6 17. Bf5 Rb8 18. b4 (18. Rfe1 $16) 18... Re8 $14 19. Bg5 h6 20. Bh4 a5 {[#]} ({Black should try} 20... Ra8 $14) 21. bxa5 (21. Ne5 $142 $1 {[%mdl 512]}) 21... Bxa3 22. Ra1 Be7 23. a6 {[%cal Ba5a6,Ba6a7][%mdl 32]} Ba8 24. Bg3 Bd6 25. a7 Rb7 26. Ne5 $36 {[%mdl 2048] White has strong initiative.} c5 (26... Qb6 $16) 27. Nc6 $18 Qc7 28. Bxd6 Qxd6 29. Qxc5 Qxc5 30. dxc5 g6 31. Bd3 Rc8 32. Ra6 Kg7 33. Rb1 Nd5 34. f3 ({Weaker is} 34. Rxb5 Rxb5 35. Bxb5 Nc3 $11) 34... Rbc7 35. Nb4 ({Not} 35. Bxb5 Nc3 $11) (35. Rxb5 Rxc6 36. Rxc6 Bxc6 $11) 35... Nc3 36. Re1 {Black must now prevent c6.} Rxc5 37. Re7 Kf8 38. Rd7 {aiming for Rf6.} Ke8 39. Rdd6 Rd8 $2 (39... Na4 {keeps fighting.} 40. Kf2 Nb2) 40. Rxd8+ {White is clearly winning.} Kxd8 41. Rb6 Rc7 42. Rb8+ Rc8 43. h4 g5 44. Bf5 {[%mdl 64] Pin. Accuracy: White = 80%, Black = 50%.} 1-0

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.02.29"]
[Round "4.4"]
[White "Boekelman, Jan"]
[Black "Van Ketel, Raoul"]
[Result "0-1"]
[ECO "E15"]
[WhiteElo "2119"]
[BlackElo "2224"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,56,16,26,0,0,0,6,0,37,0,18,10,-11,-11,-11,-94,-68,-84,-87,-107,-102,-101,-95,-125,-66,-139,-102,-222,-181,-237,-248,-314,-313,-308,-312,-313,-320,-329,-335,-337,-345,-585,-595,-576,-576,-758,-741]} 1. d4 e6 2. c4 Nf6 3. Nf3 b6 4. g3 Ba6 5. Qc2 Bb7 6. Bg2 c5 7. d5 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} exd5 8. cxd5 Nxd5 9. O-O {Hoping for Ng5.The position is equal.} Be7 10. Rd1 {[%mdl 1024] White has compensation.} Nc6 11. a3 ({Don't go for} 11. Rxd5 $2 Nb4 $17) 11... Nc7 12. Nc3 O-O {[#]} 13. Qd3 $146 {[#]} (13. Bf4 $11 {keeps the balance.}) ({Predecessor:} 13. Bf4 Re8 14. Rd2 Ne6 15. Rad1 Nxf4 16. gxf4 d6 17. Ne4 Qd7 18. Nxd6 Bxd6 19. Rxd6 {1-0 (48) Goganov,A (2565)-Bocharov,I (2571) Khanty-Mansiysk 2019}) 13... d5 $1 $17 {[%mdl 512]} 14. Nxd5 Nxd5 15. Qxd5 Qxd5 16. Rxd5 {Rd7 is the strong threat.} Bf6 17. Rd7 Na5 ({Black should play} 17... Rfd8 $17 18. Rxd8+ (18. Rxb7 Rd1+ 19. Bf1 Na5 $17) 18... Rxd8) 18. Bd2 ({Better is} 18. Rb1 $15) 18... Bc6 ({Weaker is} 18... Bxb2 19. Rb1 $11) 19. Rc7 {[#]} (19. Rd6 $17 {is a better defense.} Be7 20. Rd3) 19... Nb3 $1 $19 {aiming for ...Bxf3.} 20. Rxc6 (20. Re1 {was called for.} Bxf3 21. Bxf3 Nxd2 22. Bxa8 Rxa8 23. Rd1) 20... Nxa1 21. Rxf6 gxf6 22. Bc3 Rad8 23. Bh3 Nb3 24. e3 Rd6 25. Nh4 Rfd8 26. Kg2 $2 (26. Nf5 Re6 27. Nh6+ Kg7 28. Bxe6 fxe6 29. Ng4) 26... b5 {[%cal Bb6b5,Bb5b4][%mdl 32] Black is clearly winning.} 27. Nf5 Rb6 28. e4 b4 {Black took control after the opening. Accuracy: White = 44%, Black = 85%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.03.01"]
[Round "5.1"]
[White "Kuzubov, Yuriy"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "E06"]
[WhiteElo "2644"]
[BlackElo "2382"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,118,9,22,16,16,10,6,0,-4,-22,-23,-16,45,43,63,51,50,47,45,41,41,43,82,82,83,83,90,88,102,102,105,83,103,102,145,140,147,139,150,116,105,99,102,24,27,19,29,16,24,22,69,34,38,40,41,36,36,42,53,28,55,50,56,50,41,39,100,110,104,98,110,7,10,0,0,0,0,0,0,0,0,0,8,0,0,-8,-8,-29987,-29988,-29988,-90,-72,0,-29988,-29989,-29996,-29997,-29997,-29998]} 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. d4 O-O 6. Nc3 dxc4 7. Ne5 Nc6 8. Bxc6 bxc6 9. Nxc6 Qe8 10. Nxe7+ Qxe7 11. Qa4 c5 12. dxc5 {12.dxc5 is better than 12.Qxc4. E06: Closed Catalan: Early deviations.} Qxc5 13. Be3 Qc7 14. O-O-O {The position is equal.} Bb7 15. f3 Nd5 16. Bd4 {[#]} Nb6 $146 (16... a5 $11) ({Predecessor:} 16... Rfd8 17. Kb1 Nxc3+ 18. Bxc3 Qc5 19. Rxd8+ Rxd8 20. Rd1 Rxd1+ 21. Qxd1 Qd5 22. Qxd5 Bxd5 {½-½ (31) Navara,D (2717)-Karthikeyan,M (2606) Caleta 2020}) 17. Qa5 $14 Nd5 18. Qxc7 Nxc7 19. e4 Bc6 20. Bc5 Rfc8 21. Rd4 Nb5 22. Rxc4 Nxc3 23. Rxc3 f5 24. Re1 fxe4 25. fxe4 a5 26. b3 {[%cal Bb2b3,Bb3b4][%mdl 32]} a4 27. b4 Bb7 28. Kd2 Ba6 29. Ke3 Rd8 30. Bb6 Rd7 31. Bc7 Rf8 32. Rec1 (32. Rb1 $16) 32... g5 $11 33. g4 h5 34. h3 ({But not} 34. gxh5 $2 g4 $19) 34... hxg4 35. hxg4 Rff7 36. Be5 {Threatens to win with Rb1.} Rh7 $1 37. Bg3 Rh3 38. Kf3 Rd2 39. R1c2 Rd1 40. Kg2 Rhh1 41. Bf2 {Hoping for b5!} Rh7 42. Rc1 Rd2 43. R3c2 Rd3 ({Better is} 43... Rhd7 $14) 44. Rc6 $16 Bb7 45. Rxe6 Rd2 {[#] next ...Rf7 is good for Black.} 46. Kg1 (46. Rc5 $1 $16 {[%cal Rc5g5]} Kf7 47. Rce5) 46... Rf7 $11 47. Be3 Re2 48. Rc3 Rd7 {[%cal Rd7d1]} 49. Bf2 Bxe4 50. Rc1 $1 Rdd2 51. Re7 {White wants to mate with Rc8+.} Kf8 $132 {[%mdl 2048] Black is fighting back} 52. Ra7 {White threatens Rc8+ and mate.} Bc2 53. Bc5+ Ke8 {( -> ...Rg2+)} 54. Kf1 $2 {[%mdl 8192]} (54. Ra8+ $11 Kd7 55. Ra7+ Kc6 56. Kf1) 54... Bd3 55. Ra8+ Kd7 $2 (55... Kf7 {mates} 56. Rf8+ Kg6 57. Rg8+ Kh7 58. Re8 Rxe8+ {[%mdl 64] Discovered Attack} 59. Kg1 Re4 60. Bf2 Rxg4+ 61. Kh2 Rxf2+ 62. Kh3 Bf5 63. Rc5 Rfg2 64. Rc7+ {[#]} Kg8 $1 {[%mdl 512]} 65. Rc8+ Bxc8 66. b5 R4g3#) 56. Ra7+ $17 Ke8 $2 {[%mdl 8192]} (56... Kc8 $17 57. Bd6+ Kd8) 57. Ra8+ Kf7 {Black mates.} 58. Rd8 {[#]} Rf2+ $1 {[%mdl 512]} 59. Kg1 Rg2+ {[%mdl 64] Double Attack. Never resign too early! Accuracy: White = 79%, Black = 78%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.03.01"]
[Round "5.2"]
[White "Lombaers, Peter"]
[Black "Schoppen, Casper"]
[Result "0-1"]
[ECO "E20"]
[WhiteElo "2383"]
[BlackElo "2489"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,110,1,0,0,0,0,4,0,13,8,0,16,13,15,0,8,0,0,0,35,29,27,-9,-11,-118,-41,-109,-102,-121,-120,-142,-131,-159,-114,-126,-127,-125,-122,-127,-133,-112,-117,-122,-122,-140,-129,-150,-133,-156,-129,-152,-115,-154,-159,-152,-148,-150,-152,-165,-171,-177,-168,-181,-138,-138,-138,-139,-139,-150,-119,-178,-156,-172,-110,-113,-62,-62,-69,-134,-100,-140,-137,-157,-165,-350,-347,-539,-539,-518,-520,-518,-510,-605,-576,-1307,-1399,-1261,-1260,-29976,-29977,-29979,-29979]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Be7 6. e4 dxe4 {E20: Nimzo-Indian: 4 g3 and 4 f3.} 7. fxe4 c5 8. d5 exd5 {The position is equal.} 9. exd5 O-O 10. Be2 Re8 11. Nf3 Bg4 12. O-O Nbd7 13. Bg5 h6 {Hoping for ...Bxf3.} 14. Bh4 Bd6 15. Qc2 Qb8 {[#]} 16. Kh1 $146 ({Predecessor:} 16. h3 Bh5 17. Bd3 Bxf3 18. Rxf3 g5 19. Bf2 Bf4 20. Ne4 Nxe4 21. Bxe4 Qd6 22. g3 {0-1 (45) Ragnarsson,J (1968)-Gower,S (2069) Akureyri 2019}) 16... Bh5 17. Nb5 {[#]} (17. Bd3 $11) 17... Bf4 (17... Bxh2 $1 $17 {[%mdl 512] Threatens to win with ...Bg3.} 18. Bd3 (18. Nxh2 Bxe2) 18... a6) 18. d6 (18. Bd3 $15) 18... Bxd6 $17 19. Nxd6 Qxd6 20. Rad1 Qc6 21. Rfe1 Bg6 22. Bd3 Bxd3 23. Qxd3 Rxe1+ 24. Rxe1 Re8 25. Rxe8+ Nxe8 26. Bg3 Qe6 27. b4 Nef6 28. Bf2 Ne4 29. Kg1 f5 30. h4 Kh7 31. Bxc5 Ndxc5 32. bxc5 Nxc5 33. Qd4 b6 34. Ne5 Qf6 35. Qf4 Ne6 36. Qg3 g5 37. hxg5 hxg5 38. Qe3 Nc5 39. Qd4 Kg7 40. Qd5 (40. g3 $17) 40... Qe6 $19 41. Qd4 Kh7 (41... Ne4 $19 42. Nc6+ Kg6 43. Nxa7 Nf6) 42. Nf3 $17 {[#]} Qe7 (42... Kg6 $1 $17 43. Ne5+ Kh6) 43. Qd5 $15 Qf6 44. Ne5 ({White should try} 44. Nd4 $15) 44... Qe6 45. Qd4 g4 46. Kf1 Ne4 47. Kg1 $2 {[#]} (47. Ke2 {might work better.}) 47... Qd6 $1 $19 {[%cal Rd6d4]} 48. Qd5 (48. Qxd6 {is the only way for White.} Nxd6 49. Kf2) 48... Qxd5 49. cxd5 {[%mdl 4096] Endgame KN-KN} Kg7 50. Nc6 a5 51. Ne7 Kf6 52. Nc8 b5 53. d6 Ke6 54. Kf1 Nxd6 55. Nb6 Nc4 {Accuracy: White = 60%, Black = 76%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.03.01"]
[Round "5.3"]
[White "Van Ketel, Raoul"]
[Black "Pijpers, Arthur"]
[Result "0-1"]
[ECO "E70"]
[WhiteElo "2224"]
[BlackElo "2470"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,74,23,29,33,21,28,31,26,39,8,40,32,31,27,50,27,36,18,49,45,36,44,106,4,66,41,112,104,173,159,202,141,153,175,176,166,143,118,144,129,191,0,0,0,0,0,19,0,0,-37,-35,-182,-125,-189,-182,-262,-264,-254,-264,-259,-245,-226,-13,-2441,-1056]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 O-O 6. Ng3 h5 7. Be2 {E70: King's Indian: Miscellaneous lines with 4 e4, including 5 Nge2 and 5 Bd3 0-0 6 Nge2.} h4 8. Nf1 b5 9. cxb5 {White is slightly better.} a6 10. e5 Nh7 11. Bf3 Ra7 12. Qa4 Nd7 {[#]} 13. Be3 $146 (13. e6 $5 {[%cal Re6d7]} Nb6 14. exf7+ Rxf7 15. Qc2 $14) ({Predecessor:} 13. e6 fxe6 14. Be3 Nb6 15. Qc2 Rf5 16. Be4 axb5 17. g4 hxg3 18. Nxg3 {½-½ (18) Emelyanov,M (2543)-Le Page,C (2415) ICCF email 2017}) 13... Nb6 14. Qb3 Be6 15. d5 $36 {[%mdl 2048] White is pushing.} Bf5 16. a4 {Hoping for a5.} Bxe5 (16... dxe5 $14 17. a5 axb5) 17. Nd2 ({White should try} 17. a5 $16 axb5 18. Ra3 (18. Qxb5 Qa8 $15) (18. Nxb5 Ra6 $16)) 17... axb5 (17... Qa8 $11) 18. Nxb5 $14 Ra6 (18... Ra5 $14) 19. O-O $16 e6 (19... Nd7 $16 {is a better defense.}) 20. Rfc1 $18 Na8 21. Nc4 Ng5 22. Nxe5 dxe5 23. Bxg5 Qxg5 24. Nxc7 Nxc7 25. Rxc7 Qf4 (25... e4 $16 {was called for.}) 26. Qe3 $2 (26. Rc6 $18 Ra5 27. g3 (27. dxe6 Bxe6 28. Qc2 Bf5 $14) 27... hxg3 28. hxg3) 26... Rxa4 $11 27. Rxa4 Qxa4 28. d6 Rd8 29. h3 {Black must now prevent Qg5.} Qd4 30. Qg5 (30. d7 $5 Rxd7 31. Rxd7 Qxd7 32. Qxe5 $11) 30... Qxd6 31. Rb7 ({White should play} 31. Rc4 $15) 31... e4 ({Better is} 31... Rc8 $1 $19 32. Rb3 Qd4) 32. Qf6 (32. Be2 $17) 32... Rf8 $1 $19 33. Be2 (33. Bg4 $142) 33... Qd2 34. Bf1 e3 $1 {[%cal Re3f2]} 35. fxe3 Qxe3+ 36. Kh2 {[#]} Qf2 $2 (36... Qg3+ $1 $19 37. Kg1 Bxh3) 37. Bc4 $2 {[%mdl 8192]} (37. Rb4 $11 Qg3+ 38. Kg1) 37... Qf4+ {Black used his chance. Accuracy: White = 50%, Black = 53%.} (37... Qg3+ $142 38. Kg1 {[#]} Be4 $1 {[%mdl 576] Double Attack}) 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.03.01"]
[Round "5.4"]
[White "Tabak, Stefan"]
[Black "Solodovnichenko, Yuri"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "2100"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,80,0,8,0,9,0,6,-2,9,-3,-2,-8,4,-10,-8,-18,-19,-17,-9,-19,0,0,0,-8,29,-54,-46,-63,-58,-51,-54,-52,-60,-52,-55,-54,-47,-58,-58,-85,-91,-173,-178,-177,-187,-179,-199,-492,-489,-531,-450,-452,-324,-506,-487,-462,-509,-556,-438,-399,-397,-455,-363,-422,-363,-595,-595,-588,-588,-29985,-29986,-29986,-29987]} 1. c4 e5 2. Nc3 d6 3. e4 Nc6 4. g3 Nge7 5. Bg2 Nd4 6. d3 {B07: Pirc Defence: Miscellaneous Systems.} Nec6 {[#]} 7. h3 $146 ({Predecessor:} 7. Be3 Be7 8. Nge2 Bg4 9. O-O Bxe2 10. Nxe2 Nxe2+ 11. Qxe2 O-O 12. f4 exf4 13. Rxf4 {0-1 (25) Meyer,C (1604)-Riedl,M (1667) Moembris 2003}) 7... Nb4 {[#] And now ...Nbc2+ would win.} 8. Rb1 {The position is equal.} Be7 9. Nge2 Nbc2+ 10. Kf1 O-O 11. Nxd4 (11. b4 {is interesting.} Bd7 12. Rb2 Nxe2 13. Nxe2 Nd4 14. Nxd4 exd4 15. h4) 11... Nxd4 12. Ne2 Nxe2 13. Qxe2 Be6 14. Kg1 Qd7 15. Kh2 c6 16. Be3 d5 17. Rbd1 (17. cxd5 $11 cxd5 18. d4) 17... d4 $1 $15 {[%cal Rd4e3]} 18. Bd2 b5 19. b3 a5 20. f4 {aiming for f5.} f6 21. a4 bxa4 22. bxa4 Rfb8 23. Rb1 Bb4 24. fxe5 {Black converts the advantage convincingly.} fxe5 25. Bf3 (25. Rbf1 $17) 25... c5 $19 ({Stronger than} 25... Bxh3 26. Bxb4 axb4 27. g4 $14) 26. Bg4 Bxg4 27. hxg4 Qxa4 {Threatens to win with ...Qa2.} 28. Bxb4 $2 (28. Bc1 {was called for.}) 28... cxb4 (28... axb4 $2 29. Rhf1 $19) 29. g5 Qd7 30. g6 hxg6 31. Kg2 (31. Kg1 $142 Rf8 32. Qh2) 31... Ra6 32. Qd2 Rf6 33. c5 Rbf8 34. Qa2+ Qf7 35. Qd5 Rf2+ ({Inferior is} 35... Re6 36. Rbf1 $11) 36. Kh3 Rc2 37. Qxe5 $2 (37. Rhc1 Rxc1 38. Rxc1) 37... Qd7+ 38. Kh4 Qd8+ 39. Kh3 Qc8+ {[%mdl 64] [#] Double Attack} 40. Kh4 Rxc5 {Accuracy: White = 57%, Black = 91%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.03.01"]
[Round "6.1"]
[White "Solodovnichenko, Yuri"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "C93"]
[WhiteElo "2567"]
[BlackElo "2382"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 34,55,52,18,41,-6,44,48,49,0,0,0,0,0,0,0,0,0,0,0,0,-17,-14,-16]} 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. h3 Re8 10. d4 Bb7 11. Ng5 Rf8 12. Nf3 Re8 13. Nbd2 Bf8 14. a3 h6 15. Bc2 Nb8 16. b4 Nbd7 17. Bb2 g6 18. Qb1 Rb8 {C93: Closed Ruy Lopez: Smyslov Variation.} 19. a4 Ba8 20. axb5 axb5 {[#] White is slightly better.} 21. dxe5 $146 (21. Bb3 {keeps more tension.} Bb7 22. Ra5 c6 23. Qa2 Qe7 24. c4) ({Predecessor:} 21. Ra5 c6 22. Qa2 exd4 23. cxd4 d5 24. Bc3 dxe4 25. Bxe4 Nb6 26. Ne5 Nfd5 27. Ndf3 Qc7 28. Qb3 Bb7 29. Bd2 {1-0 (47) Lanka,Z (2565)-Garbisu de Goni,U (2380) Mondariz 1997}) 21... dxe5 {The position is equal.} 22. Nb3 c5 23. bxc5 Nxc5 24. Nxc5 Bxc5 25. Ba3 Qb6 26. Bxc5 Qxc5 27. Bb3 Kg7 28. Re3 1/2-1/2

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.03.01"]
[Round "6.2"]
[White "Pijpers, Arthur"]
[Black "Schoppen, Casper"]
[Result "0-1"]
[ECO "C95"]
[WhiteElo "2470"]
[BlackElo "2489"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 30,64,16,21,21,21,22,21,21,10,22,0,0,0,12,-33,0,0,-11,-19,-1,-12,0,-14,-12,-39,-33,-77,-85,-75,-75,-135,-134,-120,-128,-129,-98]} 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. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. Bg5 h6 16. Bd2 exd4 {C95: Closed Ruy Lopez: Breyer Variation with 10 d4.} 17. cxd4 c5 18. d5 a5 {The position is equal.} 19. Qc1 Kh7 20. b3 Bg7 21. Rb1 b4 {[#]} 22. Nh4 $146 ({Predecessor:} 22. Bd3 a4 23. Bb5 axb3 24. axb3 Re7 25. h4 Ng4 26. h5 Nde5 27. Nxe5 Nxe5 28. Bf4 {0-1 (74) Della Morte,G (2363)-Real de Azua,E (2469) Villa Martelli 2016}) 22... Ng8 (22... Nxe4 $5 23. Rxe4 Rxe4 24. Nxg6 fxg6 25. Nxe4 Nf6 $11) 23. Nf3 Ba6 24. Be3 Ngf6 25. Qd1 Qe7 26. Nh4 Kg8 27. Qd2 Qf8 28. Nhf5 gxf5 29. Nxf5 Ne5 ({Much weaker is} 29... Nxe4 30. Bxe4 Rxe4 31. Bxh6 $11) 30. Nxh6+ ({White should play} 30. Bxh6 Bxh6 31. Nxh6+ Kh8 32. Qg5) 30... Kh8 $17 31. Nf5 Bc8 32. Ng3 Ng6 {Accuracy: White = 69%, Black = 94%.} 0-1

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.03.01"]
[Round "6.3"]
[White "Tiggelman, Rene"]
[Black "Schroer, Marcel"]
[Result "1-0"]
[ECO "D13"]
[WhiteElo "2188"]
[BlackElo "2049"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,95,12,18,6,12,4,9,0,0,0,2,1,7,0,3,1,11,6,0,0,29,18,18,0,39,43,64,17,16,0,3,0,8,0,0,0,0,0,22,29,29,24,41,0,27,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,73,73,73,73,179,177,187,180,213,74,2028,3797,29970,29970,29958,29959,29953,29945,5069,2323]} 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 a6 7. Rc1 Bf5 8. e3 Rc8 9. Be2 {D13: Slav Defence: Exchange variation without ...Bf5.} e6 10. O-O Bd6 11. Bg3 {The position is equal.} Bxg3 12. hxg3 O-O 13. Nh4 Bg6 14. Nxg6 hxg6 15. Na4 {[%cal Bc3a4,Ba4c5,Bc5d3][%mdl 32]} Qe7 16. Nc5 {[#]} Rc7 $146 ({Predecessor:} 16... Nb8 17. b4 b6 18. Nd3 Rc4 19. Qd2 Ne4 20. Qb2 Rfc8 21. Ne5 R4c7 22. Rxc7 Qxc7 {½-½ (47) Palm,N (2268)-Bekker Jensen,D (2276) Denmark 2007}) 17. Qa4 Nb8 18. Rc3 Rfc8 19. Rfc1 e5 20. dxe5 Qxe5 21. Nd3 Qe7 22. Qf4 {[%cal Rc3c7]} Rxc3 23. Rxc3 Nc6 24. Nb4 Qe8 {...d4! is the strong threat.} 25. Nxc6 Rxc6 26. Qd4 Rxc3 27. Qxc3 Qe7 28. Bd1 Qd7 29. b4 Qf5 30. Qc2 (30. f3 {feels hotter.} Qb1 31. Qd2 d4 32. e4 Qa1 33. Kh2) 30... Qe5 31. Bf3 Kh7 32. a4 Ne4 33. b5 axb5 34. axb5 b6 35. Bxe4 Qxe4 $11 {[%mdl 4096] Endgame KQ-KQ} 36. Qc6 Qb1+ 37. Kh2 Qf5 38. f3 Qh5+ (38... Qe6 $11) 39. Kg1 $16 Qe5 40. Qxb6 {Strongly threatening Qd4.} Qxg3 {[#]} (40... d4 $16) 41. Kf1 $1 $18 Qe5 {intending ...Qa1+.} 42. Qd4 Qc7 43. b6 (43. Qb2 $18 {is more deadly.}) 43... Qc2 $2 {[%mdl 8192] This move loses the game for Black.} (43... Qc1+ $16 44. Kf2 Qc2+ 45. Kg3 Qb1) 44. Qb4 (44. Qh4+ $142 Kg8 45. Qb4) 44... g5 45. b7 Qc1+ 46. Kf2 Qc2+ 47. Kg3 Qc7+ 48. Kh3 {Accuracy: White = 83%, Black = 69%.} 1-0

[Event "80e Noteboomtoernooi Open 2020"]
[Site "Leiden"]
[Date "2020.03.01"]
[Round "6.4"]
[White "Mollema, Thomas"]
[Black "Ratsma, Midas"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2251"]
[BlackElo "2253"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,69,0,4,0,0,-18,-10,-39,-41,-45,-4,-9,-20,-30,0,-23,0,0,0,-23,-28,-63,-6,-6,-6,-8,-16,-5,-5,0,0,-40,4,6,6,6,6,6,6,6,6,6,8,-26,-35,-26,-25,-200,-187,-151]} 1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. exd5 Nf6 5. Nc3 Nxd5 6. Nf3 Nc6 7. Bc4 e6 8. O-O Be7 9. d4 O-O 10. Re1 Nxc3 11. bxc3 b6 12. Qe2 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} Bb7 13. Bb2 Rc8 {[#]} 14. Rac1 $146 {The position is equal.} ({Predecessor:} 14. Rad1 Na5 15. Bd3 Qd5 16. Qc2 h6 17. Re5 Qd6 18. Rh5 Bxf3 19. gxf3 Bg5 20. h4 {0-1 (29) Cigan,S (2371)-Sandhu,M (2316) Austria 2010}) 14... Na5 15. Bd3 Bxf3 16. Qxf3 ({Don't play} 16. gxf3 Bd6 $17) 16... Nc4 17. Ba1 Bg5 18. Rcd1 Qd5 19. Be4 Qa5 20. Re2 (20. h4 {seems wilder.} Bh6 21. Qe2 Nd6 22. Bc2 Qd5 23. Bb3) 20... Rfd8 21. d5 Bf6 (21... g6 $15) 22. Ree1 $11 exd5 23. Rxd5 Rxd5 24. Bxd5 Ne5 25. Qf5 Rd8 26. Be4 Ng6 (26... Kf8 {with more complications.} 27. Qxh7 Qxa2 28. c4 Qa5 29. Rf1 Nd7) 27. Qxa5 bxa5 28. c4 Bxa1 29. Rxa1 {[%mdl 4096] Endgame KRB-KRN} Rd4 30. f3 Rxc4 31. Rb1 Rb4 32. Kf2 Rxb1 33. Bxb1 Nf4 34. Ke3 $2 {[#]} (34. Bc2 $11 {and White has nothing to worry.}) 34... Nxg2+ $19 35. Kd4 {Accuracy: White = 64%, Black = 74%.} 1/2-1/2

