[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Sandipan, Chanda"]
[Black "Ungut, Tamas"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "2575"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,107,17,0,27,0,0,0,39,13,25,22,27,22,37,21,37,25,54,50,63,16,67,26,71,29,36,0,66,53,54,32,25,7,33,-43,0,0,11,7,0,-130,-139,-164,77,73,89,77,87,47,62,57,37,0,82,0,30,0,0,-212,-215,-187,-196,-206,-190,-189,-185,-1875,-1006,-959,-930,-910,-767,-752,-750,-685,-681,-1012,-1004,-956,-982,-1931,-1609,-29980,-29981,-29976,-29971,-29950,-12806,-5631,-1838,-2085,-1999,-1975,-1019,-1736,-1735,-1476]} 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 b6 5. c4 Bb7 6. Nc3 {E14: Queen's Indian: Classical Variation (4 e3)} (6. O-O Be7 7. Nc3 cxd4 8. exd4 d5 9. cxd5 Nxd5 10. Ne5 O-O 11. Qg4 f5 12. Qe2 Bf6 13. Bc4 Kh8 14. Bd2 Nxc3 15. bxc3 Bd5 16. Bb3 Bxe5 17. Qxe5 Nc6 18. Qe2 Rc8 19. Rac1 Qd7 20. Rfe1 Rfe8 21. Bf4 Bxb3 22. axb3 h6 23. h3 {½-½ (23) Bruzon Batista,L (2659)-Eljanov,P (2717) Berlin 2015}) 6... d5 7. O-O {LiveBook: 6 Games} Nbd7 8. b3 {White has an edge.} Bd6 9. cxd5 Nxd5 10. Ne4 $146 {[%cal Bc3e4,Be4d2,Bd2c4,Bc4a5][%mdl 32]} ({Predecessor:} 10. Nxd5 Bxd5 11. Bb2 Nf6 12. dxc5 Bxc5 13. Rc1 O-O 14. Bb1 Qe7 15. Qc2 g6 {½-½ (27) Kuhnert,C-Elke,C Friedrichroda 1997}) 10... Be7 11. dxc5 {With the idea Bb5.} bxc5 12. Bb2 O-O 13. Rc1 Qb6 14. Ned2 Rfd8 15. Nc4 Qc7 16. Qe2 Rac8 (16... Bf6 $11) 17. Rfd1 (17. Nfe5 $5 {[%cal Rd3h7]} g6 18. Be4 $14) 17... N5b6 18. Na5 Ba8 19. e4 Bf6 (19... Na4 $11 20. bxa4 Qxa5) 20. Bxf6 $14 Nxf6 21. Qe3 Ng4 22. Qg5 f5 23. h3 (23. Qh4 $14 h6 24. Bc2 (24. exf5 Bxf3 25. gxf3 Ne5 $11)) 23... Nf6 24. exf5 Nbd5 25. Nc4 {Threatens to win with Nce5.} Nf4 26. Nfe5 (26. Bf1 $1 $11 Bxf3 27. gxf3) 26... Rd4 $1 $17 {[%mdl 1024] Black has strong compensation.} 27. Bf1 {[#]} h6 $2 (27... Bxg2 $1 $19 28. Bxg2 h6 29. Qxf4 Rxf4 30. fxe6 Re8) 28. Qg3 $16 {Black must now prevent Rxd4.} N6h5 29. Qe3 Rcd8 30. Rxd4 cxd4 {[%cal Bc5d4,Bd4d3,Bd3d2][%mdl 32]} 31. Qe1 {Hoping for Nd2.} exf5 32. Na5 (32. Nd2 $5 {[%cal Rc1c7]} Qd6 33. g3 $14) 32... Qb6 (32... Qd6 $11 {keeps the balance.}) 33. Nec6 (33. Nac6 $16 Re8 34. Qd1) 33... d3 $1 $11 {[%cal Rd3d2]} 34. Nxd8 Nxh3+ 35. Kh2 $2 {[#]} (35. gxh3 $11 Qg6+ 36. Kh2 Qd6+ 37. Kg1 (37. f4 $2 Qxf4+ 38. Kg1 d2 $19) 37... Qg6+ 38. Kh2 Qd6+ 39. Kg1 (39. f4 $2 Qxf4+ 40. Kg1 d2 $19) 39... Qg6+) 35... Qd6+ $1 $19 36. g3 d2 37. Qe8+ Kh7 38. Rd1 Nxf2 $40 {[%csl Gh5][%cal Rd6g3][%mdl 128] Black has strong attack.} 39. Qxh5 $2 (39. Qh8+ Kxh8 40. Nf7+ Kh7 41. Nxd6 Nxd1 42. Nac4) 39... Ng4+ 40. Qxg4 fxg4 41. Ndb7 Qd4 42. Nc4 Bxb7 43. Rxd2 Qa1 44. Bg2 Bf3 45. Ne3 Qe1 46. Nc4 h5 47. Rb2 h4 48. gxh4 Qxh4+ 49. Kg1 Qe1+ 50. Kh2 {Black is clearly winning.} g5 {[%cal Bg7g5,Bg5g4][%mdl 32] ...Kh6 is the strong threat.} 51. Rd2 g3+ 52. Kh3 g4+ 53. Kh4 Kg6 54. a4 {Precision: White = 33%, Black = 64%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Shyam, Sundar"]
[Black "Oosterom, Erik"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "2534"]
[BlackElo "2099"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,97,0,33,7,39,0,0,0,6,-13,26,27,27,26,41,22,25,0,0,-15,0,0,8,-31,0,0,106,106,106,106,106,105,141,7,13,16,5,0,39,40,38,39,61,58,64,60,89,75,136,101,114,69,99,100,114,54,65,4,207,90,90,85,103,99,112,85,85,64,64,57,64,64,64,64,110,117,117,117,124,124,124,124,117,64,110,98,104,0,118,0]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bf4 Nc6 5. c3 Nf6 6. Nd2 {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack} a6 7. h3 (7. Bd3 Bg4 8. Qb3 Ra7 9. Ngf3 e6 10. O-O Be7 11. Ne5 Nxe5 12. dxe5 Nd7 13. Be3 Ra8 {½-½ (67) Morozevich,A (2676)-Fedoseev,V (2667) Moscow 2016}) 7... Bf5 8. Ngf3 {The position is equal.} e6 9. Nh4 $146 ({Predecessor:} 9. Be2 Bd6 10. Bxd6 Qxd6 11. O-O O-O 12. Re1 h6 13. Nb3 Nd7 14. Bd3 Bxd3 15. Qxd3 {½-½ (40) Maevsky,N (2323)-Holzke,F (2499) Legnica 2013}) 9... Bg6 (9... Be4 $5) 10. Nxg6 hxg6 11. Bd3 Bd6 12. Bxd6 Qxd6 13. O-O g5 {White should prevent ...g4!} 14. Be2 Ne7 {[%cal Bc6e7,Be7g6,Bg6f4][%mdl 32]} 15. Re1 Ng6 16. Nf1 Nf4 17. Bf3 Rxh3 (17... O-O-O $11 {remains equal.}) 18. gxh3 $16 Nxh3+ 19. Kg2 Nf4+ 20. Kh1 O-O-O 21. Ng3 (21. Bg2 $1 $16) 21... Rh8+ $11 22. Kg1 {[%cal Bh1g1,Bg1g2,Bg2f3][%mdl 32]} Nh3+ $1 23. Kg2 {And now Rh1 would win.} Qf4 {aiming for ...Nxf2!} (23... g4 $5) 24. Rh1 g4 {Strongly threatening ...Ne4.} 25. Qe2 $1 {Black must now prevent Bxg4!} gxf3+ 26. Qxf3 g5 27. Qxf4 Nxf4+ 28. Kf3 Rg8 (28... Nh3 $142) 29. Rag1 Kd7 30. Rh6 Ng6 31. Nh5 Ne4 32. Ke2 (32. Ke3 $16 Ke7 33. Rh7) 32... Ke7 $1 $14 33. f3 ({White should try} 33. Rh7 $14) 33... Nf6 $2 (33... Nd6 $11) 34. Nxf6 (34. Ke3 $18 {is more deadly.}) 34... Kxf6 $18 {[%mdl 4096] Endgame KRR-KRN} 35. Ke3 Kf5 36. Rh7 {[%cal Rh7f7]} (36. Rh5 {is more complex.} Nf4 37. Rh7 Kg6 38. Rh2 Kf6 39. a4) 36... Kf6 37. a4 b5 38. axb5 axb5 39. Rh5 b4 40. Rhxg5 bxc3 41. bxc3 Ra8 42. Rh5 Ra2 43. Rhh1 Rc2 {[#]} 44. Rc1 $1 {[%cal Rc1c2]} Rg2 45. Ra1 Rc2 {[#]} 46. Ra3 ({White should play} 46. Rhc1 $1 $16 {[%cal Rc1c2]} Rg2 47. Rg1) 46... Ne7 47. Kd3 Rf2 48. Ke3 Rc2 $1 49. Kd3 {Precision: White = 39%, Black = 50%.} (49. Rf1 $16) 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Pruijssers, Roeland"]
[Black "Haussernot, Cecile"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2508"]
[BlackElo "2092"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,93,91,87,240,208,216,207,231,220,218,216,211,215,218,226,228,227,230,220,228,219,209,206,209,97,101,109,105,89,74,56,53,49,53,32,30,0,0,0,0,0,0,0,8,8,39,30,195,189,729,725,710,656,29974,29975,29976,29969,29976,29977,29977,29978,29978,29978,29978,29979,29979,29980,29979,29980,29989,29990,29990,29991,29991,29992]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. Qd2 Nbd7 9. O-O-O {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} b5 (9... Be7 10. f4 b5 11. Kb1 Qc7 12. h3 Nb6 13. Bxb6 Qxb6 14. Bd3 exf4 15. Qxf4 O-O 16. Nd5 Bxd5 17. exd5 {½-½ (39) Wei,Y (2728)-Areshchenko,A (2649) Khanty-Mansiysk 2017}) 10. f4 {[%cal Bf2f4,Bf4e5][%mdl 32]} b4 11. Nd5 {LiveBook: 3 Games. White is better.} a5 $2 (11... Bxd5 $16 12. exd5 Be7) 12. Nxf6+ Nxf6 $146 ({Predecessor:} 12... gxf6 13. f5 Bxb3 14. cxb3 a4 15. Bc4 axb3 16. Qd5 Qc8 17. Qxf7+ {1-0 (28) Kreisl,R (2394)-Pirker,C (2120) Austria 2009}) 13. fxe5 a4 14. exf6 axb3 15. Bb5+ (15. Qxb4 bxa2 16. Bb5+ Bd7 $15) 15... Bd7 16. Bxd7+ ({Inferior is} 16. Qxb4 bxa2 17. Kd2 gxf6 $17) 16... Qxd7 17. cxb3 gxf6 18. Kb1 Qb5 19. Qd5 Qa6 20. a4 bxa3 21. Rd4 $1 {[%cal Rd4a4] Black must now prevent Ra4.} Rc8 22. Rc1 (22. bxa3 $1 $18 Bg7 23. Re1 (23. Qxd6 Qxd6 24. Rxd6 Rc3 $18)) 22... Rxc1+ $16 23. Bxc1 axb2 24. Bxb2 {Threatens to win with Ra4.} Be7 25. Rc4 O-O $1 26. Qf5 Rb8 27. Rc3 $40 {[%mdl 128] White has some attack.} Qe2 28. Bc1 (28. Qf3 $5 {[%cal Rf3e2]} Qe1+ 29. Rc1 $14) 28... Ra8 $1 {[%csl Ga8][%cal Re2a2]} 29. Rc8+ Rxc8 30. Qxc8+ Kg7 31. Qc2 Qb5 32. Qd1 h5 33. Qf3 Kg6 $2 (33... f5 $11 {and Black is okay.}) 34. g4 $1 $18 {[%cal Bg2g4,Bg4f5][%mdl 32]} h4 $2 {[#]} (34... Kg7 35. gxh5 f5 36. h6+ (36. exf5 Bf6 $16) 36... Kh8) 35. Qf5+ $1 Qxf5 36. gxf5+ {[%mdl 4096] Endgame KB-KB} Kh5 {[#] Strongly threatening ...Kg4.} 37. h3 $1 {White mates.} Bd8 38. Bf4 Bb6 39. b4 {[%cal Bb3b4,Bb4b5,Bb5b6][%mdl 32]} Bf2 40. b5 Bg3 41. Bc1 Bf2 42. Kc2 Bc5 43. Kd3 Bf2 44. Be3 Bg3 45. b6 d5 46. exd5 Bf4 47. Ke4 {Precision: White = 78%, Black = 46%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Pijpers, Arthur"]
[Black "Hagen, Brede Andre Larsen"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2457"]
[BlackElo "2082"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,51,29,27,23,39,39,29,8,22,0,22,-55,-46,-21,-48,-82,44,37,45,55,51,60,32,40,60,67,227,229,476,456,947,929,29984,29985,29985,29986]} 1. e4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Bc4 O-O 8. Bb3 Re8 {B35: Sicilian: Accelerated Dragon with 5 Nc3: main line} (8... d6 9. f3 Bd7 10. Qd2 Nxd4 11. Bxd4 b5 12. a4 b4 13. Nd5 Nxd5 14. Bxg7 Kxg7 15. exd5 Qb6 16. h4 h5 17. O-O-O Qa5 18. g4 Bxa4 19. Kb1 Bxb3 20. cxb3 {0-1 (33) Vachier Lagrave,M (2796)-Giri,A (2771) Stavanger 2017}) 9. h3 d6 {LiveBook: 10 Games} 10. Qd2 Bd7 {White has an edge.} 11. f3 $146 ({Predecessor:} 11. O-O Nxd4 12. Bxd4 Bc6 13. f3 a6 14. a4 Nd7 15. Bxg7 Kxg7 16. Qd4+ Kg8 17. Rfd1 a5 {0-1 (45) McDonald,I (1635)-Emiroglu,C (2081) Kemer 2009}) 11... Rc8 12. h4 h5 {[%cal Bh7h5,Bh5g4][%mdl 32]} 13. O-O-O Ne5 14. g4 (14. Bh6 $11) 14... hxg4 $15 15. h5 Nxh5 16. Bh6 {Rxh5! is the strong threat.} Kh7 (16... gxf3 $2 17. Rxh5 $1 {[%mdl 512]} Bh8 18. Rhh1 $18) (16... Nxf3 17. Nxf3 gxf3 18. Bxg7 $18) ({Better is} 16... Bf6 $17 {aiming for ...g3.} 17. Qg2 a5) 17. Bxg7 $14 Kxg7 18. fxg4 $1 Bxg4 {[#]} 19. Nf5+ $1 $40 {[%mdl 640] White attacks.} Bxf5 20. exf5 Rh8 21. fxg6 fxg6 $2 {[#]} (21... Nxg6 $14 22. Kb1 e6) 22. Ne4 $1 $18 {[%cal Bc3e4,Be4g5,Bg5e6][%mdl 32]} Rf8 $2 (22... Nc4 23. Qd4+ Ne5) 23. Ng5 Qb6 (23... Rf6 $142 24. Ne6+ Rxe6) 24. Ne6+ Kh7 {[#]} 25. Rxh5+ $1 {[%mdl 512]} gxh5 {[#]} 26. Qg5 $1 {Precision: White = 73%, Black = 23%.} ({Not} 26. Nxf8+ Rxf8 27. Qg5 Qf2 $14) 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Molenaar, Christiaan"]
[Black "Ikonnikov, Vyacheslav"]
[Result "0-1"]
[ECO "A02"]
[WhiteElo "2099"]
[BlackElo "2538"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,59,0,0,0,0,2,16,-7,8,-28,0,-22,12,14,32,-68,-55,-64,0,-71,-75,-85,0,0,87,109,162,96,97,48,84,72,86,92,93,97,100,-6,0,-36,-33,-40,-45,-45,-35,-39,-23,-137,-127,-135]} 1. f4 Nf6 2. Nf3 g6 3. d3 Bg7 4. e4 d6 5. Be2 c5 6. O-O {B07: Pirc Defence: Miscellaneous Systems} Nc6 {LiveBook: 55 Games} 7. a4 (7. c3 O-O 8. Kh1 b5 9. a3 a5 10. Be3 Ng4 11. Bg1 e5 12. fxe5 Ngxe5 13. Nxe5 Nxe5 14. d4 Nd7 15. Bxb5 Qc7 {1-0 (42) Fedoseev,V (2664)-Yu,Y (2736) Ningbo 2015}) 7... Rb8 8. c3 {The position is equal.} O-O 9. Nbd2 $146 ({Predecessor:} 9. Na3 a6 10. Nc2 b5 11. axb5 axb5 12. Ne3 b4 13. Bd2 Ng4 14. Nxg4 Bxg4 15. Qc2 Qb6 {½-½ (60) Radovanovic,S (2166)-Gavrilovic,L (2262) Serbia 2011}) 9... a6 10. Qe1 e6 11. Qh4 Nh5 12. a5 Bf6 13. Qg4 ({White should try} 13. Ng5 $14) 13... Nxa5 $15 14. e5 Bg7 (14... Be7 $1 $15 15. g3 b6) 15. d4 (15. Ng5 $11) 15... cxd4 $17 16. cxd4 Nc6 (16... b5 $17 17. Qh4 f6) 17. Nc4 $1 $11 Nb4 (17... d5 $11 18. Nd6 Bd7) 18. Nxd6 $16 Bd7 (18... Nc2 $16 19. Rb1 Qb6) 19. Bd2 ({White should play} 19. Qh3 $18) 19... Nd5 20. Qh4 (20. g3 {feels hotter.} Bc6 21. Qh3 Qb6 22. Rfc1 Rbd8 23. Nc4) 20... Nhxf4 21. Bxf4 {[#] Strongly threatening Bg5.} Qxh4 22. Nxh4 Nxf4 23. Rxf4 {Rff1 is the strong threat.} g5 24. Rf2 ({Better is} 24. Rg4 $16 gxh4 25. Rc1 (25. Rxh4 f6 $16)) 24... gxh4 $11 25. Raf1 Bh6 {White must now prevent ...Be3.} 26. Rxf7 Be3+ 27. Kh1 Rxf7 28. Rxf7 Bc6 29. Bg4 (29. Bc4 $1 $11 {remains equal.} h3 30. d5 exd5 31. Bd3) 29... Bd5 $17 30. Bf3 {Precision: White = 32%, Black = 48%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Schelvis, Richard"]
[Black "Nijboer, Friso"]
[Result "0-1"]
[ECO "D70"]
[WhiteElo "2099"]
[BlackElo "2528"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,72,-14,-6,-4,-14,-18,25,20,28,23,35,-13,-18,-67,-62,-82,-83,-291,-280,-289,-298,-290,-286,-286,-289,-295,-287,-282,-280,-299,-224,-222,-223,-322,-224,-212,-211,-254,-237,-261,-254,-250,-246,-262,-252,-873,-860,-29977,-392]} 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 Rb8 8. h3 a6 9. e4 b5 10. e5 Nd7 11. cxb5 axb5 12. Ng5 dxe5 13. Bxc6 exd4 14. Nxb5 {And now a4 would win. E63: King's Indian: Fianchetto: Panno Variation with 7...a6} (14. Ne2 Nc5 15. Bg2 h6 16. Nf3 e5 17. Bxh6 Bxh6 18. Nxe5 d3 19. Nc6 Qe8 20. Ned4 Rb6 21. Re1 Be6 {½-½ (39) Adianto,U (2548)-Gharamian,T (2655) Biel 2013}) 14... Rb6 15. Nxd4 Nb8 {[%cal Bd7b8,Bb8c6,Bc6d4,Bd4e2,Be2c3][%mdl 32]} 16. Nde6 {White has an edge.} fxe6 17. Bg2 Nc6 18. Be3 $146 ({Predecessor:} 18. Qxd8 Rxd8 19. Rb1 Ba6 20. Re1 Bd3 21. Be3 Bxb1 22. Bxb6 Bxa2 23. Bxc7 Rc8 24. Nxe6 {½-½ (24) Paredes Prats,J (2164)-Lara Ruiz,J (2353) ICCF 2007}) 18... Nd4 19. Qa4 Rxb2 20. Rad1 {[%cal Re3d4]} c5 21. Rb1 $2 (21. Qa7 $17) 21... Rxb1 $19 22. Rxb1 Ne2+ 23. Kh2 {[#]} Nc3 $1 {[%csl LRa4,LRb1][%cal Rc3a4]} 24. Qh4 {[%csl Gg5][%cal Rh4h7]} h6 25. Rc1 hxg5 26. Qxg5 Qd3 (26... Nxa2 27. Rxc5 Rf5 28. Qxg6 $17) 27. Qxe7 Nd5 ({Weaker is} 27... Nxa2 28. Rxc5 Bf6 29. Qc7 $17) 28. Qxc5 Nxe3 29. fxe3 (29. Qxe3 {was the only chance.} Qxe3 30. fxe3) 29... Bh6 30. Rc3 Qd2 31. Qd4 {[#]} Qxd4 $1 (31... Qxa2 32. Rc7 $11) 32. exd4 Bg7 33. Rc4 Rd8 34. d5 Bb7 35. dxe6 $2 (35. d6 Ba6 36. Rc6) 35... Rd2 $1 {[%csl LRa2,LRg2]} 36. Rc7 Rxg2+ {Precision: White = 31%, Black = 74%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Happel, Henk"]
[Black "Gavrilov, Alexei"]
[Result "0-1"]
[ECO "E00"]
[WhiteElo "2086"]
[BlackElo "2491"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,54,16,16,15,12,32,14,18,10,17,5,17,7,24,-7,0,-20,-11,-30,0,-15,-25,-32,-24,-43,-36,-84,-68,-73,-66,-205,-110,-210,-195,-207,-206,-208,-192,-259,-244,-450,-457]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 d6 6. f3 O-O 7. e4 e5 8. Bd3 {LiveBook: 10 Games. E27: Nimzo-Indian: Sämisch: 5...0-0 6 f3} Nfd7 {[%cal Bf6d7,Bd7b6,Bb6a4,Ba4c5][%mdl 32]} 9. Ne2 Nc6 10. Be3 {White is slightly better.} Na5 11. Ng3 Nb6 12. Qe2 $1 Be6 {[%cal Re6c4]} 13. d5 {[#]} Bd7 $146 14. O-O (14. a4 $5) 14... Na4 15. Qc2 b6 16. f4 Nb7 17. Rf2 Nac5 18. Raf1 f6 19. fxe5 dxe5 20. Nf5 Bxf5 21. Rxf5 Qd7 22. Kh1 ({White should try} 22. Bxc5 $15 Nxc5 23. Be2) 22... Qa4 (22... Nxd3 $19 23. Qxd3 Nd6) 23. R5f3 (23. Qxa4 $17 Nxa4 24. R5f2) 23... Qxc2 $19 24. Bxc2 {[#]} Nd6 $1 25. Bxc5 bxc5 26. Ba4 (26. R3f2 $142) 26... Nxe4 27. Bd7 $2 (27. Re1 {might work better.} Nd6 28. Bb5) 27... Nd2 $1 {[%csl LRc4,LRf1,LRf3] Precision: White = 10%, Black = 67%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Beerdsen, Thomas"]
[Result "0-1"]
[ECO "E40"]
[WhiteElo "2071"]
[BlackElo "2452"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,84,47,55,85,86,88,81,85,79,82,92,85,37,36,41,70,46,188,188,172,187,188,171,165,169,167,173,182,47,61,62,206,188,221,33,166,153,162,87,225,199,488,471,452,0,0,0,0,0,41,-93,-97,-169,-47,-195,-195,-195,-195,-295,-280,-350,-232,-227,-220,-29989,-29990]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Bb7 6. a3 Be7 7. d5 O-O 8. g3 b5 {E44: Nimzo-Indian: Rubinstein: 4...b6 5 Ne2} 9. b3 b4 (9... bxc4 10. bxc4 Na6 11. Bg2 Nc5 12. e4 Ba6 13. O-O Bxc4 14. e5 Nxd5 15. Nxd5 exd5 16. Bxd5 Bxd5 17. Qxd5 {½-½ (23) Popov,I (2568)-Andreikin,D (2625) Dagomys 2009}) 10. axb4 Bxb4 11. Bg2 {LiveBook: 3 Games} exd5 12. O-O c6 13. cxd5 c5 $146 ({Predecessor:} 13... Qe7 14. Bb2 a5 15. Qd4 c5 16. Qh4 {1-0 (66) Schluchter,S (2151)-Gress,A (2066) Germany 2013}) 14. Bb2 d6 15. Nf4 Nbd7 16. Ne4 Nxe4 17. Bxe4 Nf6 18. Bc2 Re8 ({Black should try} 18... Qe7 $14) 19. Nh5 $18 Nxh5 20. Qxh5 h6 21. h4 {[%cal Bh2h4,Bh4g5][%mdl 32]} Bc8 22. g4 $1 Qd7 23. Bf5 Qe7 24. Bxc8 $40 {[%mdl 128] White is up to no good.} ({Better is} 24. Bd3 $18) 24... Raxc8 25. g5 hxg5 (25... c4 $1 $14) 26. hxg5 a5 27. Rfc1 $2 (27. Kh2 $18 Qe4 28. Rh1) 27... Qe4 (27... c4 $14) 28. Rc4 Qh7 29. Qg4 {Strongly threatening Kg2.} Qd3 (29... Rc7 $16) 30. Rd1 Qxb3 $2 (30... Qg6 31. Kg2 Rb8) 31. Ba1 Ba3 {[#]} 32. Kg2 $2 (32. Bf6 $1 $18 {[%mdl 512] aiming for Kg2.} Rb8 (32... gxf6 33. gxf6+) 33. Kg2) 32... Bb2 $11 33. Bxb2 Qxb2 34. Rf4 g6 35. Rf6 {[#]} (35. Qd7 $14 Qg7 36. Qxd6) 35... Qe5 $1 $17 36. Rf4 (36. Kf3 $17 {is a better defense.}) 36... c4 (36... Rb8 $19 {...Rb4 is the strong threat.} 37. Qg3 Kg7) 37. Rxc4 ({White must play} 37. Rdd4 $1 $15) 37... Rxc4 $19 38. Qxc4 Qxg5+ $15 {KQR-KQR} 39. Kf1 (39. Kf3 {was the only chance.}) 39... Qf5 $19 40. Qb3 Qf3 41. Rd4 Rc8 {( -> ...Rc1+)} 42. Qb1 $2 (42. Rc4 $19 Rxc4 43. Qxc4) 42... Qh1+ {Precision: White = 45%, Black = 44%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Hilarius, Sander"]
[Black "Korving, Frank"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "1941"]
[Annotator "NA RC"]
[PlyCount "139"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 10,139,54,20,43,32767,32767,32767,44,54,57,61,67,60,32767,32767,101,32767,32767,32767,121,32767,137,123,112,123,110,88,107,84,102,71,32767,69,111,70,104,110,111,109,100,88,32767,97,72,41,45,53,91,97,113,47,56,0,14,-7,-13,-29,0,0,0,0,32767,32767,32767,32767,2,10,11,0,8,0,37,16,21,0,27,21,27,32767,32767,32767,32767,32767,32767,32767,32767,32767,211,732,32767,32767,593,833,60,1233,770,266,760,973,1760,1287,1527,5401,1707,6031,2094,6293,2427,29979,29971,29981,29982,29983,29984,12844,29985,29986,12845,29987,29987,12847,29988,29989,29989,29990,29991,12850,29993,29994,29995,29996]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:07]} 2. c4 {[%emt 0:00:00]} g6 {[%emt 0:00:05]} 3. Nc3 {[%emt 0:00:00]} Bg7 {[%emt 0:00:05]} 4. e4 {[%emt 0:00:00]} d6 {[%emt 0:00:04]} 5. h3 {[%emt 0:00:10]} O-O {[%emt 0:00:37]} 6. Bg5 {[%emt 0:00:15]} h6 {[%emt 0:02:03]} 7. Be3 {[%emt 0:00:10]} Nbd7 {[%emt 0:01:45]} 8. Bd3 {[%emt 0:05:44]} e5 {[%emt 0:01:02]} 9. d5 {[%emt 0:01:05]} Nc5 {[%emt 0:03:20]} 10. Bc2 {[%emt 0:00:21]} a5 {[%emt 0:00:07] LiveBook: 30 Games} 11. Nf3 {[%emt 0:04:12] E71: King's Indian: 4 e4 d6 5 h3} (11. Qd2 Kh7 12. Nge2 Bd7 13. a3 a4 14. O-O Nh5 15. g4 Nf6 16. f3 Ng8 17. Kg2 b6 18. h4 Ne7 19. Ng3 {1-0 (32) Dziuba,M (2589)-Perez Mitjans,O (2475) Linares 2013}) 11... Qe7 {[%emt 0:03:38]} 12. O-O {[%emt 0:01:54]} Ne8 $146 {[%emt 0:05:06]} ({Predecessor:} 12... Bd7 13. Re1 Ra6 14. Rc1 Rb6 15. Rb1 Rb4 16. b3 Rb6 {1-0 (48) Almeida,R (2236)-Sampaio Vianna Braga,C (1441) LSS email 2011}) 13. Qd2 {[%emt 0:04:39]} g5 {[%emt 0:02:33]} 14. g4 {[%emt 0:02:14]} Bf6 {[%emt 0:10:48]} 15. Nh2 {[%emt 0:09:22]} Kg7 {[%emt 0:04:15]} 16. f3 {[%emt 0:00:59]} Rh8 {[%emt 0:00:10]} 17. Rf2 {[%emt 0:03:45]} Nd7 {[%emt 0:00:10]} 18. Nf1 {[%emt 0:05:02]} Nf8 {[%emt 0:00:51]} 19. Ng3 {[%emt 0:00:28]} Ng6 {[%emt 0:00:17]} 20. Rh2 {[%emt 0:12:11]} Nf4 {[%emt 0:00:18]} 21. Ba4 {[%emt 0:12:35]} Kh7 {[%emt 0:01:26]} 22. Rc1 {[%emt 0:04:41]} b6 {[%emt 0:08:48]} 23. Bc6 {[%emt 0:02:12]} Rb8 {[%emt 0:00:23]} 24. a3 {[%emt 0:00:55]} Ng7 {[%emt 0:07:46]} 25. b4 {[%emt 0:00:55]} axb4 {[%emt 0:00:37]} 26. axb4 {[%emt 0:00:08]} Bd7 {[%emt 0:01:54]} 27. Bxd7 {[%emt 0:01:34]} ({White should try} 27. b5 $16) 27... Qxd7 {[%emt 0:00:02]} 28. Nge2 {[%emt 0:07:13]} Ra8 {[%emt 0:08:37]} (28... h5 $14) 29. h4 {[%emt 0:02:14]} Kg6 {[%emt 0:05:12]} 30. hxg5 {[%emt 0:04:06]} (30. Bxf4 $16 gxf4 31. Qc2) 30... hxg5 {[%emt 0:00:06]} 31. Rxh8 {[%emt 0:02:36]} Rxh8 {[%emt 0:00:03]} 32. Nxf4+ {[%emt 0:01:34]} gxf4 {[%emt 0:00:29]} 33. Bf2 {[%emt 0:00:17]} Qd8 {[%emt 0:10:16]} 34. Kg2 $1 {[%emt 0:02:15]} Bh4 {[%emt 0:00:12]} 35. Rh1 {[%emt 0:00:47]} Bxf2 {[%emt 0:01:58]} 36. Rxh8 {[%emt 0:01:09]} Qxh8 {[%emt 0:00:02]} 37. Qxf2 {[%emt 0:00:11]} Kg5 {[%emt 0:10:10]} 38. c5 {[%emt 0:01:56]} bxc5 {[%emt 0:00:07]} 39. bxc5 {[%emt 0:00:06]} Ne8 {[%emt 0:04:31]} 40. c6 {[%emt 0:00:50]} Qh7 {[%emt 0:30:35]} 41. Qg1 {[%emt 0:31:34]} Qh4 {[%emt 0:02:00]} 42. Qf2 {[%emt 0:02:08]} Qxf2+ {[%emt 0:04:26]} 43. Kxf2 {[%emt 0:00:01]} Kh4 {[%emt 0:00:07]} 44. Kg2 {[%emt 0:00:07]} f6 {[%emt 0:00:06]} 45. Nb5 {[%emt 0:00:16]} Kg5 {[%emt 0:00:07]} 46. Kh3 {[%emt 0:00:16]} Kg6 {[%emt 0:00:06]} 47. Kh4 {[%emt 0:00:12]} Kh6 {[%emt 0:00:05]} 48. Na7 {[%emt 0:01:31]} Ng7 $2 {[%emt 0:01:13]} (48... Kg7 $14) 49. Nc8 {[%emt 0:00:18]} Ne8 {[%emt 0:01:15]} 50. Ne7 {[%emt 0:00:45]} Ng7 {[%emt 0:01:25]} 51. Kh3 {[%emt 0:03:37]} Kg5 {[%emt 0:02:26]} 52. Kg2 {[%emt 0:00:11]} Kh6 {[%emt 0:00:58]} 53. Kh2 {[%emt 0:00:06]} Kh7 {[%emt 0:00:00] [#]} 54. Kh3 $1 {[%emt 0:00:00]} Kh6 {[%emt 0:00:00]} 55. Kh4 {[%emt 0:00:00]} Kh7 {[%emt 0:00:00] [#]} 56. g5 $1 {[%emt 0:00:00]} fxg5+ {[%emt 0:00:00]} 57. Kxg5 {[%emt 0:00:00]} Ne8 {[%emt 0:00:00] [#]} 58. Kf5 $1 {[%emt 0:00:00]} Ng7+ {[%emt 0:00:00]} 59. Kf6 {[%emt 0:00:00]} Nh5+ {[%emt 0:00:00]} 60. Ke6 {[%emt 0:00:00]} Ng3 {[%emt 0:00:00]} 61. Kd7 {[%emt 0:00:00]} Nxe4 {[%emt 0:00:00]} 62. fxe4 {[%emt 0:00:00]} f3 {[%emt 0:00:00]} 63. Nf5 {[%emt 0:00:00]} f2 {[%emt 0:00:00]} 64. Ne3 {[%emt 0:00:00]} Kg6 {[%emt 0:00:00]} 65. Kxc7 {[%emt 0:00:00]} Kg5 {[%emt 0:00:00]} 66. Kxd6 {[%emt 0:00:00]} Kf4 {[%emt 0:00:00]} 67. Nf1 {[%emt 0:00:00]} Kxe4 {[%emt 0:00:00]} 68. c7 {[%emt 0:00:00]} Kf4 {[%emt 0:00:00]} 69. c8=Q {[%emt 0:00:00]} e4 {[%emt 0:00:00]} 70. Qf8+ {[%emt 0:00:00]} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Kastelein, Gerard"]
[Black "Koelmans, Jan Willem"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1742"]
[BlackElo "1916"]
[Annotator "NA RC"]
[PlyCount "78"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 8,78,25,-16,33,-10,0,-13,-27,-4,0,0,-5,32767,32767,32767,32767,-19,32767,-25,-5,32767,32767,-118,-78,-115,32767,32767,32767,-100,-35,-43,-32,-85,-50,-50,-8,-19,-12,-13,12,10,30,-91,-92,-85,-75,-95,-75,-87,-10,-25,47,-209,-218,-131,-254,-606,-663,-597,-650,-586,-646,-720,32767,32767,32767,32767,-806,-795,-844,-915,-835]} 1. Nc3 {[%emt 0:00:00]} c5 {[%emt 0:00:18]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:52]} 3. d4 {[%emt 0:00:00]} cxd4 {[%emt 0:01:12]} 4. Nxd4 {[%emt 0:00:03]} Nf6 {[%emt 0:00:25]} 5. Bg5 {[%emt 0:01:05] LiveBook: 43 Games} d6 {[%emt 0:01:58]} 6. Nxc6 {[%emt 0:04:19]} (6. Bxf6 $5 gxf6 7. e3 $11) 6... bxc6 {[%emt 0:00:05]} 7. g3 {[%emt 0:00:31]} Rb8 {[%emt 0:02:24]} 8. Bg2 {[%emt 0:02:18]} Bd7 {[%emt 0:00:54]} 9. Rb1 {[%emt 0:01:58]} Qa5 {[%emt 0:03:50]} 10. Qd2 {[%emt 0:01:52]} h6 {[%emt 0:02:09]} 11. Be3 {[%emt 0:05:14]} e6 {[%emt 0:11:29]} 12. O-O {[%emt 0:02:49]} Be7 {[%emt 0:03:06]} 13. b4 {[%emt 0:02:36]} (13. Nd5 $5 Qxd2 14. Nxf6+ Bxf6 15. Bxd2 $11) 13... Qc7 {[%emt 0:00:45]} 14. a4 {[%emt 0:06:21]} O-O {[%emt 0:03:59]} 15. Rfd1 {[%emt 0:03:35]} (15. Ra1) ({White should try} 15. Ne4 $15) 15... d5 {[%emt 0:06:14]} 16. Qd4 {[%emt 0:06:30]} e5 {[%emt 0:11:30]} 17. Qxa7 {[%emt 0:03:49]} Rb7 {[%emt 0:00:11] Qa} 18. Qa6 {[%emt 0:10:23]} Rxb4 {[%emt 0:09:11]} (18... Rfb8 $17 19. Bc5 Bxc5 20. bxc5 Rb2) 19. Rxb4 {[%emt 0:02:12]} Bxb4 {[%emt 0:00:06]} 20. Na2 {[%emt 0:02:38]} (20. Bb6 $11 Qb8 21. Na2) 20... Ba5 {[%emt 0:06:24]} 21. Rb1 {[%emt 0:02:09]} Bc8 {[%emt 0:00:09]} 22. Qa7 {[%emt 0:03:24]} Qxa7 {[%emt 0:01:51]} 23. Bxa7 {[%emt 0:00:13]} Ba6 {[%emt 0:00:04]} 24. e3 {[%emt 0:04:12]} Ra8 {[%emt 0:06:28]} 25. Bb8 {[%emt 0:05:02]} (25. Rb8+ $11 {remains equal.} Rxb8 26. Bxb8) 25... Bc4 {[%emt 0:00:49]} 26. Nc1 {[%emt 0:00:57]} Bc3 {[%emt 0:01:11]} 27. Nd3 {[%emt 0:03:49]} Nd7 {[%emt 0:00:56]} 28. Bd6 {[%emt 0:01:09]} Rxa4 {[%emt 0:01:49]} 29. Bh3 {[%emt 0:00:52]} e4 {[%emt 0:04:17]} (29... Ra7 $11 30. Bxd7 Rxd7 31. Rb8+ Kh7 32. Bxe5 Bxd3 33. Bxc3 Bxc2) 30. Nf4 $2 {[%emt 0:04:24]} (30. Bxd7 $14 {is the one way to stay ahead.} exd3 31. Bf5) 30... Ne5 {[%emt 0:00:30]} 31. Rb8+ {[%emt 0:01:48]} Kh7 {[%emt 0:00:39]} 32. Bf5+ $2 {[%emt 0:03:30]} (32. Rb1) 32... g6 {[%emt 0:00:51]} 33. Bxg6+ {[%emt 0:00:55]} Nxg6 {[%emt 0:00:17]} 34. h4 {[%emt 0:00:42]} Nxf4 {[%emt 0:01:40] Bxf} 35. Bxf4 {[%emt 0:01:15]} Be2 {[%emt 0:01:09]} 36. g4 {[%emt 0:02:10]} Bxg4 {[%emt 0:00:33]} 37. Kg2 {[%emt 0:00:27]} Be6 {[%emt 0:01:54]} 38. Kg3 {[%emt 0:01:07]} Rc4 {[%emt 0:00:49]} 39. Bd6 {[%emt 0:01:46]} Bg7 $19 {[%emt 0:00:29]} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Ikonnikov, Vyacheslav"]
[Black "Fossum, Oystein Boyum"]
[Result "1-0"]
[ECO "A77"]
[WhiteElo "2538"]
[BlackElo "2247"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,59,55,39,46,48,148,162,153,102,164,168,328,337,329,324,330,77,121,106,162,160,152,161,136,72,179,158,366,345,547,347,1298,383,1308,1308,1243,1297]} 1. d4 e6 2. c4 Nf6 3. Nf3 c5 4. d5 d6 5. Nc3 exd5 6. cxd5 g6 7. e4 Bg7 8. Be2 O-O 9. Nd2 Re8 10. O-O Nbd7 11. Qc2 Ne5 12. a4 g5 13. Re1 {LiveBook: 11 Games. A77: Modern Benoni: Classical: 9...Re8 10 Nd2: 10...a6 and 10...Nbd7} Nfg4 14. Nf1 {[#]} Qf6 $146 (14... Ng6 $1 $14) ({Predecessor:} 14... Ng6 15. Ne3 Nxe3 16. Bxe3 Rf8 17. Qd2 h6 18. Rab1 f5 19. exf5 Bxf5 20. Bd3 Bxd3 21. Qxd3 {0-1 (34) Bedia,M (2305)-Zakhartsov,V (2520) Voronezh 2004}) 15. f3 $16 {White is clearly better.} Nh6 16. Be3 (16. Qd2 $142) 16... Ng6 (16... Qg6 $16) 17. Qd2 $18 Nf4 $2 (17... Re5 18. Ng3 Nf4) 18. Bb5 Re5 {[#]} 19. h4 $1 {[%cal Rh4g5][%mdl 512]} Nxg2 (19... gxh4 20. Bxf4) 20. hxg5 $2 (20. Kxg2 g4 $18) (20. Qxg2 $18 {is more deadly.} g4 21. f4) 20... Nxe1 $16 21. Rxe1 (21. gxf6 Nxf3+ 22. Kg2 Nxd2 $17) 21... Qxf3 (21... Qg6 $16 {was worth a try.}) 22. Be2 $36 {[%mdl 2048] White is really pushing.} (22. gxh6 Rh5 $11) 22... Qh3 {Strongly threatening ...Ng4.} 23. gxh6 Bf6 {[#] White must now prevent ...Kh8.} 24. Nh2 (24. Bd1 $142 $1) 24... Bh4 ({Wrong is} 24... Qg3+ $2 25. Kh1 $18) (24... Kh8 $16 {was necessary.} 25. Kh1 Bd7) 25. Bf4 Bd7 $2 (25... Bg3 $16 26. Bf1 Bxe1 27. Qxe1 Qh5) 26. Kh1 ({But not} 26. Bxe5 dxe5 27. Rf1 Kh8 $18) 26... Kh8 (26... Bf6 $142 27. Rg1+ (27. Bxe5 Bxe5 28. Qg5+ Kf8 $18) 27... Kh8) 27. Rg1 Rg8 $2 (27... Bf6 28. Rg3 Qh4) 28. Rxg8+ Kxg8 29. Bf1 Be1 30. Qxe1 {Precision: White = 50%, Black = 18%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Nijboer, Friso"]
[Black "Heemskerk, Wim"]
[Result "1-0"]
[ECO "B37"]
[WhiteElo "2528"]
[BlackElo "2175"]
[Annotator "TA"]
[PlyCount "129"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,129,33,29,37,32,19,13,60,55,79,79,73,78,75,79,79,79,74,66,86,79,103,100,162,157,169,166,164,113,131,62,64,55,47,48,56,52,43,62,46,38,72,55,159,118,119,121,139,143,144,127,135,133,125,114,212,211,212,202,236,236,236,236,236,236,236,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,229,221,221,221,221,221,221,221,221,221,472,470,475,468]} 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nc6 6. Nc2 Nf6 {[%cal Bg8f6,Bf6d7,Bd7c5][%mdl 32]} 7. Nc3 d6 8. Be2 Nd7 9. Bd2 Nc5 10. b4 Ne6 11. O-O O-O 12. Rb1 {LiveBook: 31 Games} Bd7 {B37: Sicilian: Maroczy Bind with 5...Bg7, sidelines} (12... a5 13. b5 Ncd4 14. Nxd4 Nxd4 15. Na4 e5 16. Be3 Be6 17. Bd3 Rc8 18. Rc1 Kh8 19. Re1 Qc7 20. Qd2 {1-0 (47) Gajewski,G (2621)-Mista,A (2588) Germany 2016}) 13. Nd5 Ncd4 $146 ({Predecessor:} 13... Rc8 14. Be3 b6 15. Qd2 Ne5 16. Na3 f5 17. f4 Nc6 18. exf5 Ned4 19. fxg6 Nxe2+ 20. Qxe2 hxg6 {0-1 (73) Kabanov,N (2512)-Yoshan,V (2408) Khanty-Mansiysk 2007}) 14. Nxd4 Bxd4 {The position is equal.} 15. Bh6 Re8 16. Qd2 Bh8 17. Be3 Nc7 18. Nc3 Bc6 19. f3 b6 20. Rfd1 Qc8 21. Rdc1 Qe6 22. a4 Rec8 (22... Qc8 $16 {was worth a try.}) 23. b5 Be8 24. a5 bxa5 25. Na4 ({White should play} 25. Ra1 $18) 25... Qe5 $16 26. f4 (26. Qxa5 $6 Ne6 $14) (26. b6 $16) 26... Qxe4 $14 27. Bf3 Qf5 28. b6 Rab8 29. b7 Bxa4 30. bxc8=Q+ ({Don't go for} 30. bxc8=B $2 Qxb1 31. c5 (31. Rxb1 $2 Rxb1+ 32. Kf2 Rb2 $19) 31... d5 $19) 30... Rxc8 31. Rb7 $36 {[%mdl 2048] White fights for an advantage.} Ne6 {With the idea ...Nc5.} 32. Rxa7 Bc6 ({Black should try} 32... Nc5 $14) 33. Bxc6 ({Weaker is} 33. Qxa5 Qd3 $17) ({But not} 33. Rxe7 $6 Qf6 $11) 33... Rxc6 34. Rxe7 Bf6 35. Ra7 {[%cal Be7a7,Ba7a5,Ba5d5][%mdl 32]} Qe4 36. Rxa5 Rxc4 37. Rxc4 Qxc4 38. Qxd6 Qc3 (38... Qe4 $16 39. Qd2 Nd4) 39. Qd2 $18 Qc6 40. Rd5 Kg7 41. f5 gxf5 42. Rxf5 Qe4 43. Rf1 Qe5 44. Rf3 Qa1+ 45. Qc1 Qxc1+ 46. Bxc1 {[%mdl 4096] Endgame KRB-KBN} Be5 47. Ra3 Kg6 48. Be3 h5 49. h3 Bb2 50. Rb3 Be5 51. Kf2 Bf6 52. Rb5 Bc3 53. Rd5 Bb2 54. Kf3 Bc3 55. Ke4 Bf6 56. Rb5 Bc3 57. Rb7 Bf6 58. Kd5 Bc3 59. Kd6 Bf6 60. Ra7 Bc3 61. Kd7 Bb4 62. Ra8 Kg7 63. Rc8 Kf6 $2 {[#]} (63... Kh7 64. Rb8 Be1) 64. Rh8 Kg6 65. Rh6+ {Precision: White = 84%, Black = 47%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Gavrilov, Alexei"]
[Black "Van Egmond, Rogier"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2491"]
[BlackElo "2151"]
[Annotator "TA"]
[PlyCount "41"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,41,11,16,22,28,0,0,0,7,7,12,9,19,13,37,8,72,36,54,50,70,15,83,48,122,75,85,64,162,87,429,425,475,421]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. e3 b6 6. Bd3 {E11: Bogo-Indian} d5 7. cxd5 exd5 8. Ne5 {The position is equal.} O-O 9. O-O Bb7 10. Nc3 Re8 11. Rc1 $146 {[%mdl 2048] Black is under pressure.} ({Predecessor:} 11. a3 Bxc3 12. Bxc3 Ba6 13. b4 Bxd3 14. Qxd3 Ne4 15. b5 c6 16. Nf3 Nd7 17. Rfc1 Nf8 18. Be1 Qd7 {½-½ (18) Meyer,J (2335)-Rohde,M (2540) Philadelphia 1989}) 11... c6 12. f4 Nbd7 (12... Ba6 $11) 13. Rf3 Bxc3 14. Bxc3 Ne4 15. Rh3 (15. Bxe4 $14 dxe4 16. Rg3) 15... Nf8 (15... Nxe5 $11 16. Bxe4 dxe4 17. fxe5 g6) 16. Be1 Rc8 (16... f6 $14) 17. Bxe4 dxe4 18. Qb3 Qc7 (18... Qd5 $1 $14) 19. d5 ({Better is} 19. f5 $18) 19... c5 $2 {[%mdl 8192] [#]} (19... Rcd8 $16 {is more resistant.}) 20. d6 $1 $18 {[%cal Rd6c7][%mdl 512]} a4 (20... Qxd6 21. Qxf7+) 21. Qd1 {Precision: White = 26%, Black = 22%.} ({Weaker is} 21. dxc7 axb3 22. axb3 Rxc7 $11) 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Beerdsen, Thomas"]
[Black "Van Dael, Siem"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "2452"]
[BlackElo "2132"]
[Annotator "TA"]
[PlyCount "21"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,21,-14,56,62,57,65,53,35,204,204,206,204,204,207]} 1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 f6 5. d3 (5. Bb5 Nge7 6. exd5 Qxd5 7. O-O Bd7 8. d4 a6 9. c4 Qd6 10. dxe5 fxe5 11. Rd1 Qe6 12. Nc3 Rc8 13. Ng5 Qg4 14. h3 axb5 15. Qxb5 Qf5 16. Qxb7 Nd4 17. Nb5 Bc6 18. Qa6 Nxb5 19. cxb5 Ra8 20. g4 Qc2 21. Rd2 Qg6 {0-1 (21) Durarbayli,V (2627)-So,W (2822) chess.com INT 2017}) 5... Bc5 ({Black should play} 5... Be6 $11) 6. b4 $14 {C44: Ponziani Opening and Scotch Gambit} Bb6 $146 ({Predecessor:} 6... dxe4 7. dxe4 Bd6 8. Bc4 Nge7 9. Qb3 Ng6 10. Bf7+ Kf8 11. g3 a5 12. Bc4 axb4 13. cxb4 Bxb4+ {0-1 (40) Mohannad Farhan,A (2279)-Sengupta,D (2445) New Delhi 2009}) 7. exd5 Qxd5 8. c4 Qd6 $2 {[#]} (8... Qe6 $1 $14) 9. c5 $18 {White is clearly better.} Bxc5 10. bxc5 Qxc5 11. Ba3 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Vrolijk, Liam"]
[Black "Beeren, Thom"]
[Result "1-0"]
[ECO "A67"]
[WhiteElo "2419"]
[BlackElo "1978"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,108,47,76,77,97,86,83,81,100,92,93,90,93,91,117,122,146,50,51,52,59,0,183,192,195,210,339,187,189,183,185,157,156,124,333,333,413,442,436,422,429,420,521,235,237,237,224,219,241,239,360,243,226,227,250,260,281,277,263,239,227,227,256,190,193,193,209,216,745,745,745,745,678,631,535,513,5073,1825,1837,947,12842,4614,29970,29965,29959,12845,12359,9512,29978]} 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 {[%cal Bf2f4,Bf4f5][%mdl 32]} Bg7 8. Bb5+ Nfd7 9. Bd3 O-O 10. Nf3 Na6 11. O-O Re8 12. f5 $146 {A67: Modern Benoni: Taimanov Variation} ({Predecessor:} 12. Re1 Nb6 13. h3 c4 14. Bb1 Nc5 15. Bc2 Bxc3 16. bxc3 f5 17. e5 dxe5 18. Rxe5 Rxe5 19. Nxe5 Qxd5 {½-½ (41) Andriuschenko,N (2491)-Degterev,P (2545) ICCF email 2008}) 12... Ne5 13. Nxe5 Bxe5 14. Qf3 {[#] Threatens to win with fxg6.White is better.} Qf6 15. fxg6 Qxg6 16. Bf4 Bg4 17. Qg3 Nb4 18. Bb5 Re7 19. Ba4 (19. Bxe5 $16 Rxe5 20. Rf4) 19... c4 $14 20. Bxe5 Rxe5 21. Bb5 (21. b3 $14) 21... Rc8 $2 {[#]} (21... Bh5 $1 $11 {and Black stays safe.}) 22. Rf6 $1 $18 {[%cal Rf6g6][%mdl 512]} Qg7 (22... Qxf6 23. Qxg4+) 23. Raf1 Rf8 (23... Bh5 $142 24. Qh3 (24. Rxd6 Qxg3 25. hxg3 Nd3 $14) 24... Bg4) 24. h3 (24. Bxc4 $142 {R1f2 is the strong threat.} Rg5 25. R1f2 (25. Qxd6 Bh3 $16)) 24... Bh5 25. Qxg7+ Kxg7 26. Rxd6 {And now Rd7 would win.} Rc8 27. Rf5 Rxf5 $2 (27... Nd3 $16 28. Rxe5 Nxe5) 28. exf5 a6 29. Bd7 (29. f6+ Kh6 $18) 29... Rd8 30. g4 Nd3 31. Ne4 (31. gxh5 Ne5 $18) 31... Nxb2 {aiming for ...c3!} 32. Rb6 (32. gxh5 c3 $16) (32. f6+ $142 Kh8 33. gxh5) 32... Rxd7 33. Rxb2 Rxd5 34. Rxb7 {[%mdl 4096] Endgame KRB-KRN} ({Don't take} 34. gxh5 $6 b5 $16) 34... Rd4 {Hoping for ...Bxg4.} 35. Nf2 Rd2 (35... Bxg4 $142 36. hxg4 (36. Nxg4 Rd2 $18) 36... c3) 36. Rc7 ({But not} 36. gxh5 c3 $18) 36... Rxa2 37. Rxc4 Kf6 38. gxh5 Kxf5 {KRN-KR} 39. Rc7 Ke6 40. Ne4 Ra5 41. Kg2 Ke5 42. Re7+ Kf4 43. Nf2 Rg5+ 44. Kh2 f5 $2 (44... Rf5 45. Nh1 Kg5) 45. Nd3+ Kf3 46. Rxh7 Rg2+ 47. Kh1 Rg3 48. h6 f4 (48... Rxh3+ $142 49. Kg1 Ke3) 49. h4 Rh3+ 50. Kg1 Rxh4 51. Rh8 Rg4+ 52. Kf1 Rh4 53. Ne1+ Kg3 54. h7 Kh3 {Precision: White = 62%, Black = 31%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Tomov, Georgi"]
[Black "Pruijssers, Roeland"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "2273"]
[BlackElo "2508"]
[Annotator "TA"]
[PlyCount "38"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,38,0,-10,0,0,0,0,47,0,14,-31,-45,-48,-30,-41,-28,-96,-16,-24,-24,-41,-57]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. exd5 O-O 9. O-O cxd5 10. Qf3 {LiveBook: 35 Games. C47: Scotch Four Knights and Four Knights with 4 g3} (10. h3 c6 11. Qf3 Re8 12. Bf4 Qe7 13. a3 Bd6 14. Ne2 c5 15. b3 Be6 16. Bxd6 Qxd6 17. Rad1 Qe7 {1-0 (58) Bacrot,E (2696)-Fressinet,L (2668) Balagna 2017}) 10... Bg4 11. Qg3 Qd7 12. h3 {The position is equal.} Bd6 {[%cal Bb4d6,Bd6e5,Be5f6][%mdl 32]} 13. Qh4 $146 ({Predecessor:} 13. Bf4 Bxf4 14. Qxf4 Be6 15. Rad1 c5 16. Qg5 Rab8 17. b3 h6 {0-1 (46) Saravanan,K-Cook,M (2017) England 2014}) 13... Bf5 14. Rd1 Rab8 15. a3 Rfe8 {Strongly threatening ...Bxd3.} 16. Bg5 Be5 17. Rab1 (17. Qa4 $11 {keeps the balance.}) 17... c5 ({Better is} 17... Bxd3 $17 18. cxd3 d4) 18. Bxf6 $11 Bxf6 19. Qa4 Bxc3 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Stubberud, Ornulf"]
[Black "Pijpers, Arthur"]
[Result "1/2-1/2"]
[ECO "D03"]
[WhiteElo "2248"]
[BlackElo "2457"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,85,-15,-7,-7,-27,-24,-33,-9,-35,-39,-32,-33,-44,-32,-51,-50,-58,-34,-39,-33,-66,-31,-36,-27,-33,0,0,19,-16,0,-33,-26,-30,-9,-17,-15,-50,21,0,0,-2,-16,0,0,-10,0,0,0,0,0,0,0,0,18,7,4,4,47,27,25,41,9,0,9,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. c3 O-O 6. e3 Nbd7 7. Be2 Re8 8. O-O e5 9. dxe5 Nxe5 10. Nxe5 {LiveBook: 28 Games. D03: 1 d4 d5 2 Nf3 Nf6 3 Bg5, including Torre Attack with early ...d5} (10. c4 Nxc4 11. Nxc4 dxc4 12. Qxd8 Rxd8 13. Bxc4 Re8 14. Bf4 c6 15. Rad1 Be6 16. Bxe6 Rxe6 17. Be5 Rae8 18. Bd4 Nd5 {½-½ (18) Feller,S (2580)-Belov,V (2561) Moscow 2008}) 10... Rxe5 11. Nf3 Re8 12. c4 {Black has an edge.} h6 13. Bh4 (13. Bxf6 $5 Bxf6 14. cxd5 $14) 13... c6 $146 ({Predecessor:} 13... g5 14. Bg3 Ne4 15. Qxd5 Nxg3 16. hxg3 Bxb2 17. Rab1 Bf6 {½-½ (34) Byway,P (2188)-Wu,L (2195) West Bromwich 2003}) 14. Qb3 Qb6 15. Rfd1 Ne4 16. Nd4 dxc4 17. Bxc4 Qxb3 18. Bxb3 a6 19. Rac1 c5 20. Ne2 $1 Bxb2 21. Rc2 Bg7 22. f3 $36 {[%mdl 2048] White has good play.} g5 23. Be1 (23. fxe4 {keeps more tension.} gxh4 24. Bd5 Be6 25. Bxb7 Rab8 26. Bxa6 Ra8 27. Bb7) 23... Nf6 24. e4 b6 25. a4 Nd7 26. Bd5 Ra7 27. Rb1 Rc7 (27... Bb7 $15) 28. Bf2 Be5 (28... Nf6 $5 {[%cal Rf6d5]} 29. Nc3 Nd7 $11) 29. Nc3 Bb7 30. Bc4 Bd4 31. Nd5 Bxf2+ 32. Kxf2 Bxd5 $1 33. exd5 Ra7 34. d6 Re5 35. Rd2 Ra8 36. Bd5 Rd8 37. Bc6 c4 38. Bxd7 $1 Rxd7 39. Rxb6 Ra5 40. Rc6 {The position is equal.} Rxa4 41. Rc7 c3 $1 {[%cal Rc3d2]} 42. Rxc3 Kg7 43. Rc7 {Precision: White = 44%, Black = 50%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Den Hartog, Marijn"]
[Black "Perske, Thore"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "2220"]
[BlackElo "2413"]
[Annotator "TA"]
[PlyCount "162"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,162,19,9,27,0,15,0,8,0,14,2,36,3,18,0,0,0,18,4,25,0,0,0,0,22,109,106,108,110,115,118,108,43,39,42,42,25,58,58,53,55,46,27,29,29,32,-8,-4,-8,-8,-18,-16,-18,-18,-17,-18,-58,-27,-60,-7,-11,-8,-9,-8,-8,-4,-5,-10,-3,0,0,0,0,0,-17,-6,-147,-138,-138,-143,-241,-133,-162,-148,-160,-152,-176,-189,-172,-125,-117,-115,-117,-112,-100,-30,-30,-30,-126,-114,-111,-110,-184,-184,-175,-30,-30,-30,-218,-67,-93,-32,-32,-35,-35,-35,-35,-35,-73,-73,-79,-96,-96,-99,-1229,-1183,-979,-423,-29968,-11802,-29974,-29975,-29975,-29976,-29976,-29976,-29978,-29979,-29977,-29978,-29981,-29982,-29981,-29982,-29983,-29984,-29986,-29985,-29986,-29987,-29987,-29988,-29988,-29989]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. h3 a6 {C50: Hungarian Defence and Giuoco Pianissimo} (6... O-O 7. Nc3 Be6 8. Bxe6 fxe6 9. Be3 Bxe3 10. fxe3 h6 11. Nh2 Qe7 12. Ng4 Nxg4 13. Qxg4 a6 14. a3 Rxf1+ 15. Rxf1 Rf8 16. Rxf8+ Kxf8 17. Qf3+ Qf7 18. Qxf7+ Kxf7 {½-½ (30) Adly,A (2597)-Amin,B (2663) Dubai 2017}) 7. a3 Ba7 8. Nc3 (8. c3 {is more complex.} b5 9. Bb3 O-O 10. Nbd2 h6 11. Re1) 8... h6 {The position is equal.} 9. Be3 Bxe3 10. fxe3 O-O 11. Qe1 $146 ({Predecessor:} 11. Nh2 Qe7 12. Nd5 Nxd5 13. Bxd5 {0-1 (49) Muchkaeva,G-Stjazhkina,O (2200) Elista 1996}) 11... b5 12. Ba2 Be6 13. Nh4 Bxa2 14. Nxa2 {[%cal Bc3a2,Ba2b4,Bb4c6][%mdl 32]} Nh7 15. Nf5 Ne7 16. Nb4 Nxf5 17. Rxf5 c6 (17... Ng5 $11) 18. Nxc6 $16 Qc7 19. Nb4 $1 a5 20. Nd5 Qxc2 21. Qd1 (21. Qf1 $1 $16) 21... Qxd1+ $14 22. Rxd1 Ng5 23. Rc1 Ne6 24. Rc6 Rfd8 25. Rf2 Nc5 26. Rd2 a4 27. Nc3 Rab8 28. d4 Nb3 29. Rd1 Na5 30. Rc7 Nc4 31. Rf1 Rf8 32. dxe5 dxe5 33. Rc5 Nxe3 34. Rc1 Rfd8 (34... f6 $15) 35. Kf2 $11 Nc4 36. Rc2 $1 Nd6 37. Rxe5 f6 38. Re7 Rbc8 39. Re2 Kf8 $36 {[%mdl 2048] White is under pressure.} 40. Ra7 Rc5 41. Kf3 Nf7 42. Nd5 Ng5+ (42... Re8 $5 {[%cal Rf7g5]} 43. h4 Ne5+ 44. Kg3 Nc6 $11) 43. Kf2 {[#]} (43. Kf4 $11) 43... Nxe4+ $1 $17 {[%mdl 512]} 44. Rxe4 Rdxd5 {[%mdl 4096] Endgame KRR-KRR} 45. Ree7 (45. Re2 $17 {keeps fighting.}) 45... Rg5 (45... Rc2+ $19 46. Kf3 Rf5+ 47. Ke4 Rg5) 46. g4 Kg8 47. Kf3 h5 $1 48. Rab7 hxg4+ 49. hxg4 Kh7 50. Re4 f5 51. gxf5 Rcxf5+ 52. Ke3 Re5 ({Black should try} 52... Rg3+ $17 53. Ke2 Rc5 54. Rh4+ Kg8 55. Rb8+ Kf7 56. Rf4+ Kg6 57. Rb6+ Kh7 58. Rh4+ Kg8 59. Rb8+ Kf7 60. Rf4+ Kg6 61. Rb6+ Kh5) 53. Rxe5 $11 Rxe5+ {KR-KR} 54. Kd4 (54. Kf4 $11 Rc5 55. Ke4) 54... Rh5 55. Ke4 Kh6 56. Rb6+ (56. Kf4 $17) 56... g6 $19 57. Kf4 {[#]} Rd5 ({Black should play} 57... Rf5+ $1 $19 58. Ke4 Kh5) 58. Rb8 Rc5 59. Rh8+ Kg7 60. Rb8 {[#]} Rf5+ (60... g5+ $1 $17 61. Ke4 Kg6) 61. Kg4 $1 $15 Kf6 62. Rb6+ Kf7 63. Kg3 g5 64. Rb7+ Ke6 {Strongly threatening ...Rc5.} 65. Rb6+ Kd7 {aiming for ...Rc5.} 66. Rg6 Kc7 {Threatens to win with ...Rd5.} 67. Kg4 $2 {[%mdl 8192]} (67. Kg2 $17) 67... Rf2 $19 68. Rxg5 Rxb2 (68... Kc6 $142 {White must now prevent ...Rg2+.} 69. Re5 Rxb2) 69. Kf4 (69. Kf3 $19) 69... Rb3 70. Ke4 Kb6 {Black mates.} 71. Kd4 Rxa3 72. Rg8 Ka5 73. Rg4 Rb3 74. Rg8 a3 75. Rb8 Kb4 76. Ra8 Rh3 77. Ra7 Kb3 78. Rb7 b4 79. Kc5 Rh5+ 80. Kd4 a2 81. Ra7 Rh1 {Precision: White = 39%, Black = 59%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Koelmans, Jan-Willem"]
[Black "Van de Griend, Johan"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "1916"]
[BlackElo "1797"]
[Annotator "NA RC"]
[PlyCount "89"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 13,89,26,39,20,31,9,49,26,32767,32767,32767,32767,32767,32767,28,36,33,32,38,39,35,2,45,26,59,78,64,32767,32767,32767,32767,32767,32767,32767,32767,25,89,32767,32767,32767,29,28,32767,32,79,46,35,33,32767,32767,32767,32767,32767,0,0,0,245,272,285,199,223,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,29989,32767,29991,29989]} 1. d4 d5 2. c4 dxc4 3. Nf3 c6 4. e3 Be6 5. Nc3 b5 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4} 6. a4 b4 7. Ne4 Bd5 8. Ng3 Nf6 9. Qc2 {LiveBook: 4 Games} Bxf3 (9... b3 $5 {[%cal Rb3c2]} 10. Qc3 h5 $11) 10. gxf3 e6 11. Bxc4 $146 ({Predecessor:} 11. Qxc4 Qd5 12. e4 Qxc4 13. Bxc4 {½-½ (48) Kharitonov,A (2552)-Hasangatin,R (2508) Cappelle-la-Grande 2011}) 11... Be7 12. a5 a6 13. Bd2 O-O 14. O-O Nbd7 15. Rfd1 c5 16. dxc5 Bxc5 17. Qb3 Qe7 18. Rac1 Ne5 {[#]} 19. Be2 $1 Rfd8 20. Be1 Rxd1 21. Rxd1 Rd8 22. f4 Rxd1 23. Qxd1 Nc6 24. Qa4 Nb8 (24... Qb7 $11) 25. Bf3 g6 26. Ne4 Nxe4 27. Bxe4 Kg7 28. Qc2 f5 29. Bf3 e5 30. fxe5 Qxe5 31. Qc4 Qd6 32. Bd5 Nd7 33. Bb7 Qd1 34. Kf1 Qd6 $2 (34... Ne5 $1 $11 {and Black stays safe.} 35. Qxc5 Qxe1+ 36. Kxe1 Nd3+ 37. Ke2 Nxc5) 35. Qxa6 ({Less strong is} 35. Bxa6 Ne5 $14) 35... Qxh2 36. Qe6 Qc7 37. Bd5 Nf6 38. Bc4 Ng4 39. a6 Qa7 40. Bd2 Nf6 41. b3 Ne4 42. Bc1 Nd6 43. Qg8+ Kh6 44. Qf8+ Kg5 45. e4+ 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.15"]
[Round "2"]
[White "Van t Hoff, Kees"]
[Black "Hilarius, Sander"]
[Result "1/2-1/2"]
[ECO "D18"]
[WhiteElo "1798"]
[BlackElo "1941"]
[Annotator "NA RC"]
[PlyCount "54"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 19,52,-23,-24,-6,0,32767,32767,32767,32767,0,0,0,0,0,-6,0,0,0,0,0,9,0,0,0,31,32767,32767,32767,32767,32767,32767,32767,32767,32767,16]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O Nbd7 9. h3 O-O 10. Bd3 Bxd3 11. Qxd3 Qa5 $146 {D18: Slav Defence: 5 a4 Bf5 6 e3} ({Predecessor:} 11... Qe7 12. b3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5 15. Bb2 Bd6 16. f4 Qe6 17. Ne2 Rad8 18. Nd4 Qd5 19. Qc4 {0-1 (50) Chmel,K (2068)-Mohammad,N (2275) Prague 2015}) 12. Na2 Bd6 13. Bd2 Qc7 14. Bc3 Rad8 15. Qc2 e5 16. dxe5 Nxe5 17. Nxe5 Bxe5 18. Rad1 Nd5 19. Bxe5 Qxe5 20. Rd3 Rd6 21. Rfd1 Rg6 $14 22. Rd4 Qe6 23. Kh2 Qe5+ 24. Kh1 Qg5 25. Rg4 Qe7 26. Rgd4 Qg5 27. Rg4 Qe7 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Shyam, Sundar M."]
[Black "Verstraeten, Rein"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "2534"]
[BlackElo "2316"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,91,20,26,21,33,27,27,27,28,19,32,6,10,7,2,-3,61,35,50,31,51,52,63,20,90,87,79,47,57,60,62,63,60,66,50,43,45,19,85,68,87,91,85,49,77,84,93,93,93,87,87,64,74,68,66,53,123,113,111,87,131,133,133,108,150,148,153,133,222,230,783,745,1120,1074,890,904,1095,1041,866,837]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 Ngf6 5. Nc3 cxd4 6. Qxd4 e5 7. Qd3 h6 8. a4 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7} a6 9. Bc4 Nc5 10. Qe2 {White has an edge.} Be7 11. a5 O-O $146 ({Predecessor:} 11... Be6 12. O-O Qc7 13. Bxe6 fxe6 14. Nh4 {1-0 (43) Huschenbeth,N (2536)-Zierk,S (2496) Charlotte 2016}) 12. Be3 {Black must now prevent Bxc5.} Qc7 $1 (12... Ncxe4 $2 13. Nxe4 Bg4 14. h3 $18) 13. Nd2 Be6 14. Bxe6 Nxe6 (14... fxe6 $11 15. Qc4 Rad8 16. Bxc5 d5 17. exd5 Bxc5) 15. O-O Qc6 16. Qd3 Rac8 17. Nd5 Bd8 18. c3 Nc5 (18... Nxd5 $11 19. exd5 Nc5) 19. Bxc5 $16 Qxc5 20. Nxf6+ (20. Ne3 {looks sharper.} Qc6 21. Rfd1 Re8 22. Kh1 Re6 23. Ra3) 20... Bxf6 21. Rfd1 Rfd8 22. Nf1 Bg5 23. g3 h5 24. Qe2 g6 25. Rd5 Qc7 (25... Qc4 $11 26. Qxc4 Rxc4) 26. Rad1 Qe7 27. h4 Bh6 28. Nh2 {[%cal Bf1h2,Bh2f3,Bf3e1,Be1c2,Bc2b4,Bb4d5][%mdl 32]} Rc6 29. Nf3 {And now Nxe5! would win.} Rdc8 30. Ne1 Bf8 31. Nc2 Qe6 32. Nb4 Rc5 33. Rxc5 Rxc5 34. Nd5 Kg7 (34... Rxa5 $14 35. b4 Ra4) 35. b4 Rc8 36. Kg2 f5 37. exf5 Qxf5 38. f3 {[%cal Bf2f3,Bf3g4][%mdl 32]} Kh7 39. g4 Qe6 40. Qe4 $36 {[%mdl 2048] White is on the roll.} hxg4 (40... Kh8 $16 {was called for.} 41. c4 Bg7) 41. fxg4 $18 ({Not} 41. Qxg4 Qxg4+ 42. fxg4 Rc4 $14) 41... Bg7 $2 (41... Kg7 42. Rf1 Be7) 42. h5 {[%cal Bh4h5,Bh5g6][%mdl 32] White is clearly winning.} Rf8 43. Rh1 Bh6 {[#]} 44. g5 $1 {[%mdl 512]} Bxg5 45. hxg6+ Kg8 46. Qc4 {Precision: White = 75%, Black = 27%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Pruijssers, Roeland"]
[Black "Stubberud, Ornulf"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2508"]
[BlackElo "2248"]
[Annotator "TA"]
[PlyCount "151"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,151,26,10,13,6,11,0,25,0,58,7,27,25,32,16,29,15,24,23,63,63,81,91,79,69,97,91,122,102,122,134,129,120,253,243,251,260,294,297,266,302,373,380,378,364,375,352,342,343,343,344,319,298,379,366,354,330,952,946,29985,539,534,522,513,-218,101,-12,-12,-10,-8,-8,-8,-8,0,-6,-7,-17,-14,-22,-14,-26,0,0,373,373,373,373,373,373,373,373,373,373,373,373,373,372,372,372,372,372,2112,1680,29961,29969,29972,29976,29972,29977,29972,29946,29949,1073,29966,29965,29965,29966,29972,29969,29966,29967,29968,29965,6026,5093,29971,29968,29960,446,446,446,29973,29970,29972,29970,29969,29966,29985,29975]} 1. e4 c5 2. Nf3 e6 3. b3 b6 4. Bd3 Bb7 5. O-O d6 (5... Nf6 6. e5 Nd5 7. Be4 Qc7 8. Re1 Be7 9. Bb2 b5 10. Na3 a6 11. c4 bxc4 12. Nxc4 {0-1 (41) Kasparov,G (2812)-So,W (2773) Saint Louis 2016}) 6. Bb2 {B40: Sicilian: 2...e6, Unusual lines} Nd7 7. Re1 Ngf6 8. c3 {LiveBook: 3 Games. White has an edge.} Be7 9. Bc2 O-O 10. d4 cxd4 11. cxd4 Rc8 (11... d5 $11) 12. Nbd2 $146 (12. Nc3 $14) 12... Qc7 13. Bd3 Qb8 14. Qe2 Rfe8 15. a3 Nh5 16. Qe3 e5 17. Bb5 Bc6 18. a4 g6 19. Nc4 {[%cal Rd4e5]} f6 20. Rad1 Nf8 21. g4 $36 {[%mdl 2048] White is really pushing.} Ng7 22. g5 Bxb5 23. axb5 exd4 (23... Rcd8 $16 {is a better defense.}) 24. Nxd4 $18 (24. Bxd4 fxg5 25. Bxg7 (25. Nxg5 Nfe6 $16) 25... Kxg7 $16) 24... fxg5 25. Nc6 Qc7 26. Qc3 {[%csl Gb2][%cal Rc3g7]} Nfe6 27. Ne3 {aiming for Nd5.} Qb7 28. Nd5 Kh8 29. Qh3 Bd8 30. Nxd8 Rcxd8 31. Nf6 {[%csl Gf6][%cal Rh3h7]} h5 32. Nxe8 Rxe8 33. Rxd6 g4 34. Qe3 Kh7 35. Red1 Nc5 $2 (35... Qf7 36. b4 Re7) 36. b4 Nf5 37. Qg5 (37. exf5 $142 Rxe3 38. fxg6+ Kh6 39. Bc1 (39. fxe3 Qe4 $14) 39... Na4 40. Bxe3+ Kg7 41. Bd4+ Kh6 42. g7+ Kh7 43. Rh6+ $1 {[%mdl 512]} Kg8 44. Rh8+ Kf7 45. g8=Q+ Ke7 46. Qe8+ Kd6 47. Be5#) 37... Nxd6 38. Rxd6 {[%csl Gd6][%cal Rg5g6]} Qxe4 39. Rd1 $4 {[%mdl 8192]} ({Weaker is} 39. bxc5 Qe1+ 40. Kg2 Qe4+ 41. Kg1 Qe1+ 42. Kg2 Qe4+ 43. Kg1 $11) (39. Qf6 $18 {[%csl Gb2][%cal Rf6g7] was the only winning move.} Qe1+ 40. Kg2 Qe4+ 41. Kg3 Qf3+ 42. Qxf3 Ne4+ 43. Qxe4 Rxe4 44. Rd7+ Kg8 45. Bc3) 39... Qe2 $2 {[#]} (39... Qxb4 40. Qf6 $16) (39... Nd3 $19 40. Qf6 Nxb2 41. Qxb2 Re7) 40. Qd5 ({White has to play} 40. Qc1 $1 $16 Na4 41. Rd7+ Re7 42. Rxe7+ Qxe7 43. Bd4) 40... Rf8 $11 41. Qd2 $1 {[%cal Rd2e2]} Rxf2 $1 42. Qxe2 Rxe2 43. bxc5 Rxb2 {[%mdl 4096] Endgame KR-KR} 44. c6 Rc2 ({Don't blunder} 44... Rxb5 $2 45. Rc1 $18) 45. Rd7+ Kh6 46. Rxa7 Rc5 47. Ra8 Rc3 48. Rb8 Kg5 $2 {[%mdl 8192]} (48... h4 $11 {and Black has nothing to worry.}) 49. Rxb6 $18 Kh4 {...Kh3 is the strong threat.} 50. Ra6 {Black must now prevent Ra1.} Rc1+ 51. Kf2 Kh3 52. Ra2 h4 53. Ke3 g3 54. hxg3 hxg3 55. Kd4 g2 {[#]} 56. Rxg2 $3 {[%mdl 512]} Kxg2 {KR-KPP} 57. Kd5 g5 $2 (57... Rb1 58. c7 Rxb5+ 59. Kd4 Rb4+ 60. Kd3 Rf4) 58. b6 {[%cal Bb5b6,Bb6b7][%mdl 32]} g4 {[#]} 59. b7 $1 {[%cal Rb7b8]} Rb1 60. c7 Rxb7 61. c8=Q {KQ-KR} Rb5+ 62. Ke6 Kh3 63. Qh8+ Kg3 64. Qd4 Kh4 65. Kf6 Rb3 66. Kg6 Rf3 67. Qe4 Rf2 68. Qh1+ Kg3 69. Kg5 Rg2 70. Qe1+ Kf3 71. Qc3+ (71. Qf1+ $142 Kg3 72. Qe1+ Kf3 73. Kf5 Re2 74. Qc3+ Re3 75. Qc4 Kf2 76. Kxg4) 71... Kf2 72. Kf4 Kg1 (72... Rg1 $18 73. Qe3+ Kf1 74. Qc1+ Kg2 75. Qb2+ Kf1) 73. Qe1+ {White mates.} Kh2 74. Qh4+ Kg1 75. Ke3 g3 76. Kf3 {Precision: White = 68%, Black = 41%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Pijpers, Arthur"]
[Black "Tomov, Georgi"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2457"]
[BlackElo "2273"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. e4 {Program Activation Required} c6 2. d4 d5 3. e5 c5 4. dxc5 e6 5. Be3 Nh6 6. Nf3 {B12: Caro-Kann: Advance Variation} Nc6 (6... Nf5 7. Bg5 Qc7 8. Bd3 h6 9. Bc1 Bxc5 10. Nc3 O-O 11. Bxf5 exf5 12. Nxd5 Qd8 13. b4 Be6 {½-½ (51) Vallejo Pons,F (2697)-Khenkin,I (2669) Don Benito 2012}) 7. Bxh6 gxh6 8. Bb5 Qa5+ 9. Nc3 Bg7 $146 ({NOTEXT:} 9... Bxc5 10. O-O Bd7 11. a3 Qc7 12. Bxc6 Bxc6 13. Ne2 d4 14. Nexd4 {0-1 (25) Couso,L (2294)-Kotronias,V (2587) Stockholm 2006}) 10. Qd4 O-O 11. Bxc6 bxc6 12. O-O f6 13. Rfe1 Rb8 14. a3 fxe5 15. Nxe5 Rxb2 16. Re2 Ba6 17. Rd2 Rf5 18. f4 Rb7 19. Qe3 Rbf7 20. Nxf7 Rxf7 21. Rb1 Qxc3 22. Rb8+ Rf8 23. Qxe6+ Kh8 24. Rxf8+ Bxf8 25. Rd1 Qxc5+ 26. Kh1 Qe7 27. Qxc6 Bb7 28. Qc3+ Qg7 29. Qxg7+ Kxg7 30. c4 Bxa3 31. cxd5 Kf7 32. Rb1 Bxd5 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Perske, Thore"]
[Black "Ikonnikov, Vyacheslav"]
[Result "1/2-1/2"]
[ECO "B30"]
[WhiteElo "2413"]
[BlackElo "2538"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,67,23,5,4,7,8,15,25,17,26,12,18,0,0,0,0,0,17,-5,-5,-9,0,0,14,14,14,14,12,0,0,0,0,-6,0,0,0,0,0,0,0,0,0,0,5,5,5,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 d6 6. Nd2 Bg5 7. Nf1 Bxc1 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6} 8. Rxc1 Nge7 9. Ne3 O-O 10. O-O Be6 (10... Ng6 11. Ncd5 Be6 12. c3 Na5 13. Nf5 Kh8 14. g3 Qd7 15. Nde3 {1-0 (96) Vachier Lagrave,M (2722)-Carlsen,M (2821) Biel 2011}) 11. Ncd5 {LiveBook: 4 Games} Rb8 $146 ({Predecessor:} 11... Bxd5 12. Nxd5 Rb8 13. a3 b5 14. Ba2 Nxd5 15. Bxd5 {1-0 (38) Bacrot,E (2695)-Ansell,S (2349) chess.com INT 2017}) 12. a4 a6 13. c3 Kh8 14. Nxe7 Qxe7 15. Bd5 Qd7 {The position is equal.} 16. Bxe6 fxe6 17. Nc2 d5 18. b4 cxb4 19. cxb4 (19. Nxb4 {keeps more tension.} Rbc8 20. Qg4 Qd6 21. Nxc6 Rxc6 22. exd5 exd5 23. Qb4) 19... b5 20. axb5 Rxb5 21. Ra1 Nxb4 22. Nxb4 Rxb4 23. Rxa6 h6 24. Qa1 dxe4 25. dxe4 Rxe4 26. Ra8 Re8 27. h3 Rd4 28. Re1 Rd8 29. Qa5 Rd5 30. Rxd8+ Qxd8 31. Qxd8+ Rxd8 32. Rxe5 Rd6 33. g3 Kg8 34. Kg2 {Precision: White = 51%, Black = 68%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "De Rover, Yong Hoon"]
[Black "Nijboer, Friso"]
[Result "0-1"]
[ECO "B52"]
[WhiteElo "2385"]
[BlackElo "2528"]
[Annotator "TA"]
[PlyCount "184"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,184,0,0,-60,-62,-50,-55,-57,-65,-83,-41,-48,-45,-58,-51,-51,-52,-58,-62,-81,-60,-72,-54,-64,-69,-54,-66,-49,-38,-41,-36,-27,-27,-27,-29,-39,-43,-39,-41,-45,-45,-100,-99,-180,-98,-114,-95,-135,-77,-79,-80,-110,-74,-83,-67,-65,-53,-75,-68,-67,-43,-218,-118,-158,-158,-168,-168,-189,-183,-182,-183,-190,-183,-183,-158,-158,-158,-158,-158,-158,-158,-158,-132,-158,-145,-158,-147,-158,-155,-275,-158,-512,-153,-153,-127,-127,-127,-127,-76,-80,0,0,0,-8,-8,-8,-8,-25,-8,-286,-74,-74,-74,-75,-74,-74,-12,-343,-76,-76,-74,-74,-74,-74,-74,-72,-72,-72,-68,-68,-68,-68,-68,-68,-68,-68,-68,-68,-54,-51,-52,-57,-30,-20,0,-73,-73,-73,-73,-73,-73,-79,-79,-29985,-29986,-29986,-29970,-29967,-29971]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nc6 6. O-O Nf6 7. Nc3 g6 8. d4 cxd4 9. Nxd4 Bg7 10. Nde2 a6 {B52: Sicilian: Moscow Variation with 3...Bd7} (10... Qe6 11. Nd5 Qxe4 12. Nc7+ Kd7 13. Nxa8 Qxc4 14. Nc3 Rxa8 15. Bg5 Rc8 16. Rc1 Qg4 17. Qd2 Qd4 18. Qe2 Qg4 19. Qb5 Qb4 20. Qd3 Qd4 21. Qe2 Qg4 22. Qd2 Qd4 {½-½ (22) Rublevsky,S (2698)-Rodshtein,M (2654) Sochi 2015}) 11. f3 Ne5 12. b3 b5 13. cxb5 axb5 14. Be3 O-O {LiveBook: 7 Games} 15. Qd2 (15. Rc1 $11) 15... b4 $15 16. Na4 {[#]} Nc4 $1 {[%cal Rc4d2][%mdl 512]} 17. Qc1 $146 (17. bxc4 Qxa4) ({Predecessor:} 17. Qd3 Nxe3 18. Qxe3 Qb7 19. Rac1 Nd7 {1-0 (43) Rahal,M (2395)-Gual Pascual,A (2430) Paretana 1999}) 17... Rfc8 18. Bd4 e5 19. Bf2 Qe8 20. Qd1 Bh6 21. Qd3 Rc6 22. Rfd1 Na3 23. g4 Nd7 24. h4 Nc5 25. Nxc5 dxc5 26. g5 Bf8 {Hoping for ...Rd6.} 27. Qd7 h6 28. Rac1 hxg5 29. hxg5 c4 30. Qxe8 Rxe8 31. bxc4 Be7 32. Be3 Nxc4 33. Rd7 Rcc8 34. Bf2 (34. Kf2 $15) 34... Bxg5 $17 35. Rb1 (35. Rc2 $17) 35... Be7 (35... Bd2 $1 $19 36. Bh4 Ra8) 36. Be1 Bf8 (36... Na3 {is more complex.} 37. Rc1 Nc2 38. Bd2 Rc4 39. Kg2 Kg7) 37. Rb7 Rb8 (37... Na3 $142 38. Rb2 Nc2) 38. Rxb8 Rxb8 39. Rc1 Nd6 40. Rc2 f5 41. exf5 Nxf5 42. Rc4 Kf7 43. f4 Rb5 44. Bd2 $2 (44. Re4 $15) 44... Bc5+ (44... Rc5 $1 $19 {[%cal Rc5c4]} 45. Rxc5 Bxc5+ 46. Kf1 e4) 45. Kg2 Nd6 $1 {[%cal Rd6c4]} 46. Rc2 e4 {[%cal Be5e4,Be4e3][%mdl 32]} 47. Ng3 Ke6 48. Kh3 Kd5 49. Be1 e3 50. Kg4 Ne4 51. Kf3 Nxg3 $1 52. Bxg3 {[%mdl 4096] Endgame KRB-KRB} Kd4 53. Be1 Ra5 54. Rb2 Kc4 55. Ke4 Ra8 56. Rc2+ Kb5 57. Bh4 Rh8 58. Bf6 (58. Bg5 $17 {is a better defense.}) 58... Re8+ (58... Rh7 $1 $19 59. Bb2 Bb6) 59. Be5 $2 {[#]} (59. Kf3 $17 {is more resistant.}) 59... g5 $1 {[%mdl 512]} 60. Kf3 (60. fxg5 Bd6) 60... gxf4 61. Bxf4 Bd4 62. Ke2 Ka4 (62... Rf8 $142 63. Bg3 Bc5) 63. Rc4 Bf6 ({Black should play} 63... Rd8 $17) 64. Bd6 $11 Bc3 65. Rc7 Bd2 66. Ra7+ Kb5 67. Bf4 Kc4 (67... Kb6 $5 {[%cal Rb6a7]} 68. Rc7 Rf8 $15) 68. Rd7 $2 {[%mdl 8192]} (68. Rc7+ $11 Kd5 69. Rb7) 68... Kc3 $2 (68... Ra8 $1 $19 69. Rc7+ Kd4) 69. Ra7 Kc2 70. Ra6 Re4 (70... Rf8 $5 {[%cal Rf8f4]} 71. Bxe3 Re8 72. Rc6+ Bc3 $11) 71. Bh6 Rh4 ({Better is} 71... Bc1 $17) 72. Rc6+ $2 {[%mdl 8192]} (72. Bxe3 $11 {and White stays safe.} Rh2+ 73. Bf2) 72... Kb2 $2 (72... Kb1 $1 $19 {has better winning chances.} 73. Kd3 Kxa2) 73. Ra6 $17 Bc1 74. Kd3 Rh2 75. Bxe3 Rh3 76. Kc4 Bxe3 77. Kxb4 {KRB-KR} Rh4+ 78. Kb5 Kc3 79. Ra3+ Kd2 80. Ra8 Rh5+ 81. Kc4 Rc5+ 82. Kb4 Bd4 83. a4 Kd3 84. a5 Rd5 85. Rc8 Be3 86. Ra8 (86. Rc3+ $11 Ke2 87. Ra3) 86... Bd2+ 87. Ka4 Bc3 88. Ra7 Rc5 89. Ra8 Kc4 {( -> ...Bb4)} 90. Ra7 $2 {[%mdl 8192] [#]} (90. Ra6 $17) 90... Bb4 $1 {Black mates.} 91. Ra8 Rh5 92. Rc8+ {[#]} Bc5 $1 {Precision: White = 46%, Black = 56%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Van Delft, Merijn"]
[Black "Gavrilov, Alexei"]
[Result "1-0"]
[ECO "C06"]
[WhiteElo "2384"]
[BlackElo "2491"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,97,12,27,4,13,23,14,0,61,61,35,29,50,12,0,0,20,14,71,47,46,49,116,108,95,51,74,26,52,36,47,0,15,10,23,31,24,16,37,0,559,570,1716,1721,1695,1044,29985,555,29991,684,681,679,626,550,533,506,546,533,610,608,613,587,628,606,668,658,660,654,718,721,760,759,777,777]} 1. e4 e6 2. d4 d5 3. Nd2 Be7 4. Ngf3 Nf6 5. e5 Nfd7 6. Bd3 c5 7. c3 Nc6 8. O-O a5 9. a4 {C06: French Tarrasch: 3...Nf6 4 e5 Nfd7 5 Bd3 main lines} (9. Re1 cxd4 10. cxd4 Qb6 11. a4 Nxd4 12. Nxd4 Qxd4 13. Nf3 Qb6 14. Be3 Nc5 15. Bb5+ Bd7 16. Nd4 Bxb5 17. Nxb5 O-O 18. Qg4 Rfc8 {0-1 (33) Naroditsky,D (2631)-So,W (2779) ICC INT 2015}) 9... cxd4 10. cxd4 Nb4 11. Bb1 b6 12. Re1 Ba6 13. Nf1 Rc8 {LiveBook: 12 Games} 14. Ra3 b5 15. axb5 Bxb5 16. h4 Nc6 (16... h6 $11) 17. Bg5 $146 h6 18. Bxe7 Qxe7 19. h5 Nb6 20. Ne3 Rb8 21. Qc1 Nc4 (21... Qb7 $11) 22. Nxc4 Bxc4 23. Rc3 {Threatens to win with b3!} Rb6 ({Black should try} 23... Qd7 $14) 24. b3 $16 Bb5 25. Rc5 {Hoping for Rxb5!} Kd7 26. Re3 {[%cal Be1e3,Be3c3,Bc3g3][%mdl 32]} Rc8 27. Rec3 Be2 {Black wants to play ...Bxf3.} 28. Nd2 Qg5 (28... Ba6 $5 {[%cal Rc6d4]}) 29. Rg3 $36 {[%mdl 2048] White has good play.} Qf4 $1 30. Rxg7 {[#] g3 is the strong threat.} Bxh5 31. Bd3 $1 {[%cal Rd3b5] Strongly threatening Bb5.} Qxd4 32. Bb5 Qxe5 $2 {[%mdl 8192] [#]} (32... Rxb5 $1 $11 33. Rxb5 Qxe5 34. Rb7+ Rc7 35. Rxc7+ Kxc7) 33. Nc4 $1 $18 {[%mdl 512]} Qxg7 (33... dxc4 34. Rxe5) 34. Nxb6+ Kd8 35. Nxc8 Nd4 36. Qf4 (36. Qa3 $142 Nxb5 37. Rxb5 f6 38. Rb8 Qc7 39. Qf8+ Be8 40. Qxf6+ Kd7 41. Qe7+ Kc6 42. Na7+ Qxa7 43. Qxa7) 36... e5 37. Qh4+ (37. Rxd5+ $142 Kc7 38. Qc1+ Kb8 39. Rd7 Qxg2+ 40. Kxg2 Bf3+ 41. Kh2 Bc6 42. Bxc6 Ne6 43. Nb6 Nd8 44. Qd2 Nxc6 45. Qd6#) 37... Qg5 {White is clearly winning.} 38. Qxg5+ hxg5 39. Ba4 Ne6 40. Rc1 d4 41. Nd6 d3 {If only Black now had time for ...d2....} 42. f3 g4 43. Kf2 Nf4 44. Ne4 f5 45. Nd2 g3+ 46. Kf1 Ke7 47. Rc5 Kf6 48. Rxa5 Bg6 49. Bc6 {Precision: White = 55%, Black = 37%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Warmerdam, Max"]
[Black "Beerdsen, Thomas"]
[Result "1-0"]
[ECO "A60"]
[WhiteElo "2357"]
[BlackElo "2452"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. d4 {Program Activation Required} Nf6 2. c4 e6 3. g3 c5 4. d5 b5 5. dxe6 fxe6 6. Bg2 {A60: Modern Benoni: Early Divergences} d5 7. cxd5 exd5 8. Nc3 Bb7 9. Bg5 Be7 10. Nh3 Na6 11. Nf4 Qa5 $146 ({NOTEXT:} 11... Nc7 12. O-O Ng8 13. Bxe7 Nxe7 {1-0 (22) Gleizerov,E (2553)-Ducarmon,Q (2436) Montcada 2013}) 12. O-O O-O-O 13. Qb3 Nc7 14. a4 c4 15. Qc2 b4 16. Nb5 Nxb5 17. axb5 Qxb5 18. Rxa7 Kb8 19. Rfa1 Bc5 20. R7a5 Bxf2+ 21. Kxf2 Qb6+ 22. Ke1 Ne4 23. Bxe4 Qg1+ 24. Kd2 dxe4+ 25. Nd3 Qd4 26. Bf4+ Kc8 27. Rc1 Bd5 28. Rxd5 c3+ 29. bxc3 Qxd5 30. cxb4+ Kd7 31. Qc7+ Ke8 32. Rc5 Qa2+ 33. Ke3 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Vreeburg, Jan"]
[Black "Vrolijk, Liam"]
[Result "0-1"]
[ECO "E92"]
[WhiteElo "1927"]
[BlackElo "2419"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,68,0,0,-9,2,-26,-12,-17,-6,-23,-35,-63,-14,-11,-22,-14,6,0,0,0,-2,-30,-30,-19,-14,-17,-21,-17,-25,-33,-31,-26,0,0,0,0,0,-10,-8,-11,-11,-47,-10,-10,-12,-20,-23,-124,-125,-670,-659]} 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. Rd1 Na6 11. Nd2 {E92: King's Indian: Classical: 6 Be2 e5: 7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7} (11. Be3 c6 12. h3 Bf8 13. Nd2 Nc5 14. O-O a5 15. a3 a4 16. Rb1 Be6 17. Kh2 Nfd7 18. Rfc1 h5 {½-½ (57) Fodor,T (2502)-Smith,B (2444) Baia Sprie 2012}) 11... c6 12. O-O Nc5 13. Be3 {The position is equal.} Ne6 14. c5 Nd4 15. f3 Nd7 $146 ({Predecessor:} 15... Nxe2+ 16. Nxe2 Be6 17. b3 Red8 18. Nb1 Bf8 19. Nbc3 Nd7 {½-½ (42) Russu,E (2202)-Damian,P (1997) Baile Olanesti 2010}) 16. Nb3 {[%cal Rb3d4]} Nxe2+ 17. Nxe2 b6 18. Nc3 Bf8 19. cxb6 axb6 20. a3 Nf6 21. Rd2 (21. Bxb6 $2 Rb8 $17) 21... Be6 22. Nc1 Nd7 23. Nd3 f6 24. Rc1 Rec8 25. f4 Bc4 26. Nxe5 Nxe5 27. fxe5 fxe5 28. Rcd1 Bb3 29. Rf1 b5 30. Ne2 (30. Rd7 {with more complications.} Rd8 31. Rc7 Rd3 32. Bc1 Bc5+ 33. Kh1) 30... Rd8 31. Rxd8 Rxd8 32. Rc1 $1 Bc4 33. Nc3 (33. Kf2 $11 {keeps the balance.}) 33... Rd3 $17 34. Kf2 $2 {[%mdl 8192] [#]} (34. Re1 $17) 34... Rxe3 $1 {[%mdl 512] Precision: White = 35%, Black = 57%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Van Brussel, Bert"]
[Black "Koelmans, Jan-Willem"]
[Result "1/2-1/2"]
[ECO "B47"]
[WhiteElo "1828"]
[BlackElo "1916"]
[Annotator "NA RC"]
[PlyCount "93"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 10,74,16,20,52,45,41,35,38,0,10,0,15,8,38,-41,-43,-43,-45,-42,-27,-111,-74,-98,-104,-93,-95,-93,-75,-91,-82,-78,-49,-137,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,-553,-529,-403,-416,-276,-300,-239,-278,-297,32767,32767,32767,32767,32767,32767,0,0,0,-12,0,0]} 1. e4 c5 2. Ne2 d6 3. g3 Nf6 4. Bg2 Nc6 5. O-O e6 6. d4 cxd4 7. Nxd4 Qc7 8. Nc3 a6 9. Kh1 Be7 10. f4 O-O 11. Be3 Bd7 {LiveBook: 31 Games} 12. Nxc6 {B80: Sicilian Scheveningen: 6 g3 and 6 Be3, including English Attack} (12. Nb3 $14 b5 13. g4 b4 14. Na4 d5 15. Nb6 Rad8 16. exd5 Nxd5 17. Nxd5 exd5 18. Qf3 Na5 19. Nxa5 Qxa5 {½-½ (31) Guseinov,G (2609)-Mchedlishvili,M (2656) Tbilisi 2012}) 12... Bxc6 13. Qe2 $146 ({Predecessor:} 13. g4 Rfe8 14. g5 Nd7 15. Rf3 b5 16. Rh3 b4 17. Qh5 Nf8 18. Ne2 Qb7 19. Ng3 g6 {½-½ (48) Rabatin,J (2281)-Oberhofer,C (2091) Pardubice 2016}) 13... b5 14. a3 Qb7 15. e5 (15. Bd4 $11) 15... Ng4 16. Rg1 Nxe3 17. Qxe3 dxe5 18. fxe5 Rac8 19. Ne4 Bd5 20. c3 Qc7 21. Rge1 ({White should play} 21. Qf4 $15) 21... Qxe5 22. Rad1 Qc7 23. Rd2 Rfd8 24. Rde2 Bc4 25. Rf2 f5 26. Qf3 fxe4 27. Qf7+ Kh8 28. Bxe4 Bd5 29. Bxd5 Rxd5 30. Qxe6 Rd7 31. Rf7 Qb7+ 32. Re4 Re8 33. Qe5 Rd1+ 34. Kg2 Rd2+ 35. Kh3 Qd7+ 36. Rg4 {[#]} Rxh2+ $1 37. Kxh2 Qxg4 $11 38. Qxe7 Qe2+ 39. Qxe2 Rxe2+ 40. Kh3 Kg8 41. Ra7 Rxb2 42. Rxa6 Rb3 43. a4 bxa4 44. Rxa4 Rxc3 45. Ra7 h6 46. Rb7 Kh7 47. Rb6 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.16"]
[Round "3"]
[White "Koes, Richard"]
[Black "Le Clercq, Maxim"]
[Result "1/2-1/2"]
[ECO "B00"]
[WhiteElo "1818"]
[BlackElo "1906"]
[Annotator "NA"]
[PlyCount "107"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 8,87,41,45,45,39,37,32,60,29,86,64,66,-12,-35,-45,-26,-40,36,19,42,28,51,38,41,36,41,-12,49,-47,-16,-57,-22,-66,32767,32767,32767,32767,32767,-85,-97,-183,32767,-360,-256,-455,32767,32767,32767,32767,32767,32767,32767,0,0,-64,-87,0,32767,32767,32767,-216,-208,-500,32767,32767,32767,32767,32767,32767,32767,32767,32767,-272,-308,32767,-305,-518,-98,-101,-97,-87]} 1. e4 Nc6 2. d4 d5 3. e5 f6 4. f4 {B00: Queen's Fianchetto Defence, Nimzowitsch Defence} Nh6 {LiveBook: 7 Games} (4... Bf5 5. Nf3 Qd7 6. c3 Nh6 7. Be3 e6 8. Nbd2 Be7 9. Be2 O-O 10. h3 fxe5 11. fxe5 Bg6 12. O-O Nf5 {1-0 (41) Bocharov,D (2560)-Schneider,I (2481) Berlin 2015}) 5. Nf3 Bf5 6. Bd3 e6 7. c3 Be4 8. Qe2 f5 9. Ng5 Qd7 10. Nxe4 $146 (10. O-O $14) ({Predecessor:} 10. Nd2 O-O-O 11. a4 Bxd3 12. Qxd3 Ng8 {1-0 (32) Cespedes,C (2094)-Montoya Perez,J (1928) Cartagena 2016}) 10... fxe4 11. Bb5 a6 12. Ba4 b5 ({Better is} 12... Nf5 $15) 13. Bc2 Be7 14. Qh5+ Kd8 15. a4 b4 16. a5 Na7 17. O-O (17. Ba4 $5 {[%cal Ra4d7]} c6 18. g4 $11) 17... Nb5 (17... Nf5 $11) 18. Ba4 (18. g4 $1 $14) 18... Nf5 19. Qe2 c5 20. Be3 ({Better is} 20. dxc5 $11 Bxc5+ 21. Kh1) 20... Qa7 21. Kh1 cxd4 22. Bxd4 Nbxd4 23. cxd4 Qxd4 24. Rc1 (24. Nd2 $17) 24... e3 25. b3 (25. Qc2 {was necessary.} Qa7 26. g4) 25... Bc5 ({Not} 25... Qxa1 26. Qc2 $16) 26. Ra2 Ke7 27. Bc6 Ra7 28. Rac2 Qxf4 29. Rxc5 Qxe5 30. Nd2 $1 Qb2 31. R5c2 (31. R1c2 $1 $11 Nd4 32. Qxe3 Nxc2 {[#]} 33. Rxc2 $1 {[%mdl 512]} Qxc2 34. Qxa7+ Kf6 35. Qf2+ Ke7 36. Qa7+ Kf6 37. Qf2+ Ke7 38. Qa7+) 31... exd2 32. Qxd2 Qd4 33. Qg5+ Qf6 34. Qg4 (34. Qd2 $17 {only move.}) 34... Nd4 {[#]} 35. Rd2 $2 (35. Rf2 $3 {[%mdl 512] only move.} Qxf2 36. Qxg7+ Kd6 37. Qxa7) 35... Nxc6 36. h3 h5 37. Qe2 Ne5 38. Qe3 Rd7 39. Qc5+ Ke8 40. Qc8+ Qd8 41. Qxa6 Ke7 42. Re2 $2 (42. Re1 Rd6 43. Qe2) 42... Qa8 $2 (42... Qb8 $19 {has better winning chances.} 43. Ree1 Rf8) 43. Qb6 Qb8 44. Qe3 $17 Ng4 45. Qxe6+ Kd8 46. g3 Qd6 47. hxg4 hxg4+ 48. Kg2 Qxe6 49. Rxe6 Re8 50. Rxe8+ Kxe8 51. Rc8+ Ke7 52. Rb8 Ra7 53. Rxb4 Rxa5 54. Rxg4 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Ikonnikov, Vyacheslav"]
[Black "Ypma, Peter"]
[Result "1/2-1/2"]
[ECO "A55"]
[WhiteElo "2538"]
[BlackElo "2283"]
[Annotator "TA"]
[PlyCount "144"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,144,73,71,80,58,94,72,98,52,50,54,52,56,59,37,56,29,28,24,44,19,22,-25,-26,-44,-24,-38,-27,-40,0,0,2,0,120,2,2,2,2,2,2,2,15,18,14,15,16,16,14,0,0,0,0,-8,-8,-8,-8,-8,0,-164,0,-8,-8,-8,0,-4,0,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,8,8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,0,0,-8,-8,-8,0,-8,-8,-7,-8,-8,-8,-8,0]} 1. d4 d6 2. Nf3 Nd7 3. c4 Ngf6 4. Nc3 e5 5. e4 Be7 6. Be2 c6 7. O-O Qc7 8. Qc2 {LiveBook: 11 Games} h6 {A55: Old Indian Defence with Nf3 and e4} (8... Nf8 9. Rd1 Ng6 10. Rb1 a5 11. dxe5 dxe5 12. Na4 Nf4 13. Bxf4 exf4 14. e5 Nd7 15. Qe4 f6 16. e6 {1-0 (43) Polak,T (2535)-Schweda,R (2457) Austria 2010}) 9. b4 $146 ({Predecessor:} 9. h3 Nf8 10. Rd1 g5 11. dxe5 dxe5 12. Ne1 Ng6 13. Be3 Be6 14. a3 g4 15. h4 Nxh4 16. Na4 {½-½ (50) Matic,P (2227)-Todic,Z (2314) Belgrade 2005}) 9... g5 10. d5 Nf8 {White is better.} 11. dxc6 bxc6 12. b5 Ne6 13. bxc6 Qxc6 14. Be3 Nf4 15. Bxf4 gxf4 16. Rfd1 Kf8 17. Rac1 Rg8 18. c5 Qxc5 19. Qd3 {Black must now prevent Nd5.} Qa3 20. Nd2 Be6 21. Nc4 Bxc4 (21... Qb4 $5 {[%cal Rf4f3]} 22. a3 Qb3 $15) 22. Qxc4 Kg7 23. Nb5 Qc5 {[#]} (23... Qa5 $1 $11 {remains equal.}) 24. Nxd6 (24. Qb3 $1 $16 Qb6 25. Rc7) 24... Bxd6 $11 25. Qxc5 Bxc5 26. Rxc5 Nxe4 27. Rxe5 Nc3 {Strongly threatening ...Rge8.} 28. Re1 Rae8 29. Bh5 Rxe5 30. Rxe5 {[%mdl 4096] Endgame KRB-KRN} Rb8 {( -> ...Rb1+)} 31. h4 Rb5 32. Rxb5 Nxb5 {KB-KN} 33. Kf1 Nc3 34. a3 Kf6 35. Ke1 Ke6 36. Be2 $2 (36. Kd2 $11 {and White has nothing to worry.} Nb1+ 37. Kd3) 36... Kd5 $2 (36... Nxe2 $19 37. Kxe2 Kf5) 37. Bd3 {The position is equal.} Kd4 38. Kd2 Nd5 39. Bc2 Nc3 (39... f3 $5 40. gxf3 Nb6 $11) 40. Bh7 f6 41. Bg6 Nb5 (41... a5 $5 {[%cal Rc3b5]}) 42. a4 {[%cal Ba3a4,Ba4a5,Ba5a6][%mdl 32]} Nd6 43. Ke2 Nc4 44. Bf5 Ne5 45. a5 Kc5 46. a6 Kb6 47. Bc8 f3+ 48. gxf3 Nc4 49. f4 (49. Kd3 $5 {[%cal Rd3c4]} Nd6 50. Bd7 $11) 49... Nd6 50. Be6 Kxa6 51. Kf3 $1 {[%cal Rf3g4] And now Kg4 would win.} h5 52. Ke3 Kb5 53. Kd4 Kc6 54. Bd5+ Kd7 55. Bf3 Nf5+ 56. Ke4 Ng7 57. Kd5 a5 58. Bd1 Ke7 59. Kc5 Ne6+ 60. Kb5 Nxf4 61. Kxa5 Kf7 62. Kb4 Kg6 63. Kc3 Ng2 64. Kd4 Nxh4 65. Ke4 Ng2 66. Kf3 Nh4+ 67. Ke4 Kg5 68. f4+ Kg6 69. Be2 f5+ 70. Ke5 Ng2 {[#] aiming for ...h4.} 71. Bxh5+ $1 {[%mdl 512]} Kxh5 72. Kxf5 Nxf4 {Precision: White = 58%, Black = 65%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Nijboer, Friso"]
[Black "Van Delft, Merijn"]
[Result "0-1"]
[ECO "B92"]
[WhiteElo "2528"]
[BlackElo "2384"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,83,7,15,0,8,0,0,0,13,0,0,0,0,0,0,0,0,0,0,-8,-4,-62,-20,-65,-65,-65,-65,-68,-62,-69,-63,-65,-58,-48,-41,-87,-86,-118,-104,-139,-109,-155,-168,-234,-231,-175,-79,-71,-91,-87,-97,-418,-420,-388,-384,-539,-537,-551]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Be3 Be6 10. Qd3 Nbd7 11. Nd5 Bxd5 12. exd5 Rc8 13. c4 Ne8 {B92: Sicilian Najdorf: 6 Be2} 14. Qd2 f5 {LiveBook: 6 Games. White must now prevent ...f4.} (14... b6 15. Rac1 a5 16. Na1 g6 17. b4 Ng7 18. bxa5 bxa5 19. Bd3 Nc5 20. Bc2 a4 21. Rb1 {0-1 (66) Carlsen,M (2853)-Grischuk,A (2771) Saint Louis 2015}) 15. g3 b6 {[#] The position is equal.} 16. Rac1 $146 ({Predecessor:} 16. Kh1 g6 17. Rae1 Ng7 18. Na1 Nc5 19. f3 a5 20. Nc2 Nh5 21. Bh6 {½-½ (49) Hjartarson,J (2545)-Yilmaz,M (2616) Baku 2016}) 16... a5 17. f3 Nc5 18. f4 Nxb3 19. axb3 exf4 20. Rxf4 Bg5 21. Rf2 Bxe3 22. Qxe3 g6 23. g4 Ng7 24. Rc3 (24. Rcf1 $11) 24... Qc7 25. Qh6 {And now Rh3 would win.} fxg4 26. Bxg4 Qc5 $36 {[%mdl 2048] Black is more active.} 27. Qe3 Rce8 28. Rxf8+ Kxf8 29. Qf2+ Qxf2+ 30. Kxf2 $15 {[%mdl 4096] Endgame KRB-KRN} Re4 31. Be2 Nf5 32. Rf3 {[#]} Rh4 $1 33. h3 Kg7 34. Bf1 Kf6 35. b4 (35. Bd3 $142) 35... axb4 $19 36. Rb3 Ke5 (36... Rf4+ $19 37. Kg1 Nd4 38. Rxb4 {[#]} b5 $1 {[%mdl 512]}) 37. Rxb4 $17 Rf4+ 38. Kg1 Ng3 39. Bg2 $2 {[%mdl 8192]} (39. Bd3 $17) 39... Ne2+ $19 40. Kh1 Rf2 41. Rxb6 (41. Rb3 {is a better defense.} Nf4 42. Bf3) 41... Nf4 42. c5 {Precision: White = 27%, Black = 63%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Gavrilov, Alexei"]
[Black "Perske, Thore"]
[Result "1/2-1/2"]
[ECO "C14"]
[WhiteElo "2491"]
[BlackElo "2413"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,74,47,52,83,60,61,56,50,50,58,67,58,53,63,62,66,72,70,53,84,80,94,67,65,70,76,72,83,85,72,82,86,85,121,86,136,148,144,147,153,137,150,139,133,55,44,27,72,62,137,134,114,86,79,-20,-25,-30,-25]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 a6 8. Nf3 Nb6 {C14: French: Classical System: 4 Bg5 Be7 main line} 9. Qd2 Bd7 10. a4 {LiveBook: 6 Games} a5 {White is slightly better.} 11. b3 $146 ({Predecessor:} 11. Qe3 Qb4 12. b3 Nc8 13. h3 Ne7 14. g4 c5 15. Kf2 cxd4 16. Nxd4 O-O 17. Bd3 Nbc6 18. Nf3 f6 19. Na2 Qa3 20. Nc3 Qb4 21. Na2 Qa3 22. Nc3 Qb4 {½-½ (22) Spassky,B (2548)-Kortschnoj,V (2567) Elista 2009}) 11... c5 12. dxc5 Qxc5 13. Qd4 Qxd4 14. Nxd4 Nc6 15. Ncb5 {aiming for Nxc6.} O-O 16. O-O-O Nc8 17. Kb2 N8e7 18. Be2 Nb4 19. Nd6 Rab8 20. Rd2 (20. Rhe1 {seems wilder.} Nc8 21. N6b5 Na6 22. Nc3 Ne7 23. h4) 20... Nc8 21. Nxc8 Rbxc8 22. Rc1 Nc6 23. Nb5 Ne7 24. Nd6 Rb8 25. c4 Bc6 26. Bf3 Rbd8 27. cxd5 Nxd5 28. Bxd5 Bxd5 29. Rc7 b6 30. Rdc2 f6 31. Ka3 (31. Ra7 $16 {Rcc7 is the strong threat.} fxe5 32. Rcc7 (32. fxe5 h6 $14) 32... Rxf4 33. Rxg7+ Kf8 34. Rxh7) 31... fxe5 $14 32. fxe5 h5 33. Re7 {[#] Hoping for Rcc7.} Rf4 (33... Kh7 $14) 34. Rcc7 $16 Rg4 35. g3 Rf8 {[#]} 36. Nf7 (36. Ne8 $1 $16) 36... Rb4 $11 37. Kb2 Rxb3+ {Precision: White = 65%, Black = 51%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Vrolijk, Liam"]
[Black "Warmerdam, Max"]
[Result "1-0"]
[ECO "E84"]
[WhiteElo "2419"]
[BlackElo "2357"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,51,43,55,45,56,59,61,50,66,48,76,70,89,100,62,74,47,43,154,173,255,251,290,293,304,301,623,620]} 1. d4 Nf6 2. c4 g6 3. f3 Bg7 4. e4 d6 5. Nc3 O-O 6. Nge2 Nc6 7. Be3 a6 8. Qd2 Rb8 9. Rc1 Bd7 10. Nd1 {E84: King's Indian: Sämisch Panno: 7 Nge2 a6 8 Qd2 Rb8} (10. h4 h5 11. Nd1 e5 12. d5 Ne7 13. Nf2 Nh7 14. c5 f5 15. Qb4 fxe4 16. fxe4 Rf6 17. cxd6 cxd6 {1-0 (37) Kovalenko,I (2667)-Smirin,I (2676) Poikovsky 2016}) 10... b5 11. c5 e6 12. Nf2 Ne7 13. g3 b4 {LiveBook: 13 Games} 14. Nf4 a5 {[#]} 15. Bd3 $146 ({Predecessor:} 15. cxd6 cxd6 16. Be2 Bb5 17. Bxb5 Rxb5 18. b3 Qd7 19. O-O Rbb8 20. Rc2 Rfc8 {½-½ (20) Moreno Ruiz,J (2536)-Vazquez Igarza,R (2572) Madrid 2011}) 15... Bb5 16. O-O e5 17. Ne2 {[%cal Bf4e2,Be2d4,Bd4c6][%mdl 32]} exd4 18. Nxd4 Bxd3 19. Nxd3 Nd7 20. cxd6 cxd6 21. Rfd1 d5 {[#]} (21... Rc8 $14) 22. exd5 $1 $16 {Black must now prevent d6.} Nxd5 (22... Bxd4 $142 23. Bxd4 Nxd5) 23. Nc6 $18 Qf6 24. Nxb8 Rxb8 25. Bf2 Qxf3 $2 {[#]} (25... N5b6 26. Qe2 Qf5) 26. Ne1 $1 {[%csl LRd5,LRf3] Precision: White = 93%, Black = 38%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Kuipers, Stefan"]
[Black "Shyam, Sundar M"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "2388"]
[BlackElo "2534"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,79,34,20,10,13,6,17,-16,-15,-14,0,-36,2,-13,62,68,57,72,70,71,87,46,46,45,55,42,64,31,95,100,93,87,97,93,95,81,152,141,184,177,233,158,192,0,0,0,160,0,0,0,2001,1955,2284,1823,5243,5235,5227,5097,5097,4602,1472,575]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c3 g6 7. O-O Bg7 8. Nbd2 O-O 9. Re1 Re8 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines} 10. h3 h6 {LiveBook: 10 Games} 11. Nf1 b5 {The position is equal.} 12. Bc2 d5 13. Qe2 Be6 {[#]} 14. a4 $146 ({Predecessor:} 14. Ng3 Qd7 15. Rd1 Rad8 16. a4 Qc8 17. Be3 dxe4 18. dxe4 {½-½ (44) Adams,M (2744)-Sokolov,I (2647) Prague 2002}) 14... b4 15. N1d2 Rb8 16. a5 {[#]} b3 $1 {[%mdl 512]} 17. Bxb3 $14 dxe4 18. dxe4 Rxb3 19. Nxb3 Bxb3 20. Ra3 Be6 21. Qxa6 Qa8 22. Qe2 Rb8 23. a6 {[%cal Ba5a6,Ba6a7][%mdl 32]} Ne8 {[#]} (23... Nd7 $14) 24. a7 $1 $16 {[%mdl 512]} Rb7 (24... Nxa7 25. Be3) 25. Be3 $36 {[%cal Bc1e3,Be3c5,Bc5b4][%mdl 2080] Keeping Black busy.} Nd6 26. Qa6 Nd8 27. Rd1 Rxb2 ({Better is} 27... Bc4 28. Qa5 Be2) 28. Bc5 Bc4 29. Qa5 Be2 (29... Nc6 {might work better.} 30. Qxc7 Nxe4) 30. Rd5 Bf8 31. Bb4 ({Worse is} 31. Qxc7 Ne6 $17) 31... Bxf3 32. gxf3 Ne6 {( -> ...Qd8)} 33. Rxd6 $2 (33. Rxe5 $16 Rb1+ 34. Kh2) 33... cxd6 $11 (33... Bxd6 $2 {perishes.} 34. Qd5 $18) 34. Qb6 $1 {[%cal Rb6b8]} Nf4 $2 {[%mdl 8192] [#]} (34... Ng5 $11 35. Qb8 Nxf3+ 36. Kg2 Nh4+ 37. Kg3 Qxe4 38. Qxf8+ Kxf8 39. a8=Q+ Qxa8 40. Rxa8+ Ke7 41. Kxh4 Rxf2) 35. Qb8 $1 $18 {White is clearly winning.} Nxh3+ 36. Kh2 Rxf2+ 37. Kxh3 Rxf3+ 38. Kg2 Qxe4 {[#]} 39. Qxf8+ $1 {[%mdl 512]} Kh7 {[#]} (39... Kxf8 40. a8=Q+) 40. Qh8+ $1 {[%mdl 512] Precision: White = 66%, Black = 45%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Visser, Henk-Jan"]
[Black "Sandipan, Chanda"]
[Result "0-1"]
[ECO "B08"]
[WhiteElo "2234"]
[BlackElo "2575"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,89,-5,-11,-11,-29,-10,-20,-3,-17,-6,-7,-7,-7,30,0,0,0,0,-17,0,-26,0,0,0,0,0,0,9,1,6,0,0,0,10,9,16,-27,-34,-60,134,114,175,150,130,56,109,86,87,83,89,20,18,20,21,19,21,-164,-152,-169,-127,-83,-27,-493,-494,-29995,-29996,-29996,-29997,-29997,-29998,-29999]} 1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Nf3 d6 5. h3 Nf6 6. Be3 O-O 7. a4 d5 8. e5 Ne4 9. Bd3 Nxc3 10. bxc3 c5 11. Qd2 {LiveBook: 4 Games. B08: Pirc Defence: Classical System} (11. h4 Nc6 12. h5 Qa5 13. Bd2 Qc7 14. hxg6 hxg6 15. Qc1 cxd4 16. cxd4 Bg4 17. Bh6 Nb4 18. Qd2 Nxd3+ 19. cxd3 f6 20. Bxg7 Kxg7 21. exf6+ Rxf6 22. Qh6+ Kf7 23. Ne5+ {1-0 (23) Jones,G (2663)-Wall,T (2193) Reading 2017}) 11... c4 12. Bf1 $146 ({Predecessor:} 12. Be2 Nc6 13. Bh6 f6 14. exf6 exf6 15. Bxg7 Kxg7 16. O-O Be6 17. Rfb1 Qd7 18. Nh2 h5 {1-0 (41) Moberg,K (2300)-Alquist,E Stockholm 1992}) 12... f6 13. g4 {The position is equal.} Nc6 {[%cal Rf6e5]} 14. Bg2 Be6 15. O-O Qd7 16. Rab1 h5 17. Nh2 (17. exf6 {seems wilder.} Bxf6 18. Nh2 hxg4 19. hxg4 Rf7 20. Qe2) 17... fxe5 18. dxe5 hxg4 19. hxg4 Nxe5 20. Bh6 Bxh6 21. Qxh6 Rf6 22. Rfe1 Nf7 $1 {[%cal Rf7h6]} (22... Nxg4 $6 23. Nxg4 Bxg4 24. Rb5 $16) 23. Qd2 Rd8 $132 {[%mdl 2048] Black is fighting back} 24. g5 Rf5 25. Ng4 {[%cal Bh2g4,Bg4e3,Be3f1][%mdl 32] Hoping for Qe3.} Kf8 26. f4 b6 27. Qd4 Qc7 28. Rxe6 Rxf4 29. Qd1 {Strongly threatening Qe2.} Qc5+ $2 (29... Qc8 $15 {stays ahead.} 30. Qe2 Nxg5) 30. Ne3 $1 $16 d4 (30... Nxg5 $16 {was called for.} 31. Re5 (31. Rb5 Qa3 $11) 31... Re4 32. Rxe4 Nxe4 33. Qf3+ Kg7) 31. cxd4 $18 Rdxd4 {[#]} 32. Qe2 ({White should try} 32. Qe1 $1 $16 Rd6 33. Rb5 Qxb5 34. axb5 Rxe6 35. Qg3) 32... c3 (32... Qxg5 $14 33. Rb5 Qg3) 33. Rb5 Qa3 {Threatens to win with ...Qc1+.} 34. Nf1 (34. Rxg6 Qa1+ 35. Bf1 Rd2 $19) 34... Qc1 {...Rd2 is the strong threat.} 35. Rd5 (35. Rxe7 $16 Rd1 36. Bh3 (36. Rxa7 Re1 $15)) 35... Rd2 $1 $11 {[%cal Rd2e2]} 36. Qe1 Qxe1 37. Rxe1 Rxc2 38. Be4 $2 (38. Ne3 $11 {and White is okay.} Ra2 39. Rd3) 38... Rg4+ $19 39. Kh1 Rf2 {White must now prevent ...Rxe4!} 40. Bxg6 {[#]} Nxg5 ({Better is} 40... e6 $1 $17 {[%cal Re6d5]} 41. Ne3 Rg3) 41. Rd8+ $2 {[%mdl 8192]} (41. Ne3 $11 Rh4+ 42. Kg1 Nh3+ 43. Kh1 Nf4+ 44. Kg1 Nh3+ 45. Kh1) 41... Kg7 {( -> ...Rh4+)} 42. Be8 (42. Rxe7+ $19 Kxg6 43. Ne3) 42... Rh4+ {Black mates.} 43. Kg1 Nh3+ 44. Kh1 Nf4+ 45. Kg1 Rg2# {Precision: White = 44%, Black = 37%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Den Hartog, Marijn"]
[Black "Pijpers, Arthur"]
[Result "0-1"]
[ECO "B63"]
[WhiteElo "2220"]
[BlackElo "2457"]
[Annotator "TA"]
[PlyCount "50"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,50,25,28,-31,-39,-39,-45,-70,-69,-72,-63,-83,-77,-172,-165,-195,-135,-279,-276,-317,-309,-408,-391,-670,-676,-878,-929,-1297,-1252]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Qb6 8. Nb3 a6 9. O-O-O Be7 10. f3 O-O 11. g4 Qc7 {B63: Sicilian: Richter-Rauzer: 7...Be7 and unusual Black 7th moves} 12. h4 b5 {[%cal Bb7b5,Bb5b4][%mdl 32] LiveBook: 8 Games} 13. Kb1 $146 ({White should play} 13. Bxf6 $11 Bxf6 14. Qxd6 Qxd6 15. Rxd6) ({Predecessor:} 13. Be3 Ne5 14. Qf2 Nfd7 15. Kb1 b4 16. Ne2 Bb7 17. Ng3 Rac8 18. g5 f5 19. exf5 exf5 {1-0 (84) Amonatov,F (2634)-Yakovich,Y (2567) St Petersburg 2008}) 13... Ne5 $15 {Black is slightly better.} 14. Rh3 b4 15. Ne2 d5 16. exd5 Nxd5 17. Bxe7 Qxe7 18. f4 (18. Nf4 $17) 18... Nxg4 $19 {Hoping for ...Nf2.} 19. Ned4 Bb7 (19... a5 $19 20. Nb5 Ba6) 20. Bd3 (20. Na5 $17) 20... a5 {[%cal Ba6a5,Ba5a4,Ba4a3][%mdl 32]} 21. Rg3 h5 (21... Qxh4 22. Rdg1 $15) 22. Re1 a4 23. Nf5 $2 {[#]} (23. Nc1) 23... Qf6 {Black is clearly winning.} 24. Nc5 exf5 25. Nxb7 a3 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Caglar, Sila"]
[Black "Pruijssers, Roeland"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "1976"]
[BlackElo "2508"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,72,0,0,0,0,-2,-2,19,0,0,0,2,0,0,-17,-13,-28,-25,-43,-53,-55,-55,-58,-49,-58,-54,-62,-64,-69,-50,-51,-41,-64,-16,-20,95,-6,133,154,141,115,269,251,499,493,475,468,885,885,885,871,853,851,1026,1026,29984,29983,29983]} 1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. Nf3 c6 5. a4 Nf6 6. Bc4 O-O 7. O-O d5 8. exd5 cxd5 9. Bb3 {LiveBook: 3 Games} Nc6 {B08: Pirc Defence: Classical System} 10. h3 e6 (10... Bf5 11. Ne2 Rc8 12. c3 Qb6 13. Ba2 Rfd8 14. Nf4 h6 15. Re1 g5 16. Nd3 Ne4 {1-0 (29) Minasian,A (2620)-Kazhgaleyev,M (2550) Linares 1999}) 11. Re1 Qb6 {The position is equal.} 12. Rb1 $146 ({Predecessor:} 12. Qd3 a6 13. Bf4 Bd7 14. Qd2 Na5 15. Ba2 Rac8 16. Ne5 Be8 {0-1 (41) Rolland,P-Tringov,G Bordeaux 1964}) 12... Bd7 13. Bg5 h6 14. Bf4 Rfc8 15. Ne5 Be8 16. Nxc6 bxc6 17. Qd2 Kh7 18. Be5 Nd7 19. Bxg7 Kxg7 20. Rbd1 a5 21. h4 h5 22. Ne2 Qd8 23. g3 c5 24. c4 dxc4 (24... Qb6 $5 {[%cal Rb6b3]} 25. Ba2 dxc4 $15) 25. Bxc4 Nb6 {[#]} (25... cxd4 $11 26. Bb5 (26. Qxd4+ Qf6 $15) 26... Qf6) 26. Bb5 (26. Bxe6 $1 $16 fxe6 27. Nf4) 26... Nxa4 (26... Bxb5 $11 27. axb5 Ra7) 27. Bxe8 $16 Qxe8 28. Nf4 {Threatens to win with b3.} Rd8 $2 {[#]} (28... Qe7 $16) 29. d5 $1 $18 Rab8 $2 {[#]} (29... Kg8 {was worth a try.} 30. b3 Nb6) 30. Nxh5+ $1 {[%mdl 512]} gxh5 31. Qg5+ Kf8 (31... Kh7 $142 32. Qxh5+ Kg7) 32. dxe6 fxe6 33. Qf6+ Kg8 34. Rxd8 Rxd8 35. Rxe6 Qf8 36. Qg5+ Kh7 {Precision: White = 55%, Black = 33%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Van Deutekom, Yde"]
[Black "Hilarius, Sander"]
[Result "1-0"]
[ECO "D17"]
[WhiteElo "1858"]
[BlackElo "1941"]
[Annotator "NA RC"]
[PlyCount "71"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Nfd7 11. Nxe5 Nxe5 12. Qb3 $146 {D17: Slav Defence: 5 a4 Bf5: Lines with 6 Nh4 and 6 Ne5} ({Predecessor:} 12. Qd4 f6 13. Bg2 Qa5 14. Bxe5 fxe5 15. Qe3 Qc5 16. Qg5 Bg6 17. Be4 Bxe4 18. Nxe4 Qb4+ 19. Nc3 Qe7 {½-½ (48) Genov,P (2498)-Ponomariov,R (2710) Bilbao 2004}) 12... Bd6 13. Bg2 O-O (13... Qe7 $5 {[%cal Re5d3]}) 14. O-O Be6 15. Qc2 Nc4 16. Bxd6 Qxd6 17. a5 (17. Ne4 $5 {[%cal Re4d6]} Qe7 18. b3 $11) 17... a6 18. Ne4 Qe5 19. b4 Rfd8 20. Rfd1 Bd5 21. Nc5 Bxg2 (21... Qe7 $16) 22. Kxg2 Nd6 {[#]} 23. Ra3 $1 Re8 24. Re3 $18 Qf6 25. Rxe8+ Rxe8 26. Qd3 Nb5 27. Qd7 Qe5 28. Rd3 Rf8 29. Re3 Qb2 30. Nd3 Qa2 31. Qxb7 Nd4 32. Qxa6 Nxe2 33. Qxc6 h5 34. Qe4 Nc3 35. Qe5 h4 36. Qxc3 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Coiffait, Casimir"]
[Black "Van Ginkel, Henk"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1853"]
[BlackElo "1846"]
[Annotator "NA RC"]
[PlyCount "35"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f3 c6 5. Be3 b5 6. Qd2 Nbd7 7. O-O-O Qa5 8. Kb1 Bb7 9. g4 Nb6 10. Nd5 Qxd2 11. Nxf6+ exf6 12. Bxd2 O-O-O $14 13. Nh3 Nc4 14. Bxc4 bxc4 15. Ba5 Rd7 16. Rhe1 d5 17. exd5 cxd5 18. Re8+ 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Sandipan, Chanda"]
[Black "De Rover, Yong Hoon"]
[Result "1-0"]
[ECO "E65"]
[WhiteElo "2575"]
[BlackElo "2385"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,47,29,37,34,28,37,29,31,43,0,0,-49,-62,-57,-65,-72,-8,-6,0,0,447,417,616,616,595,572]} 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nf3 Nf6 5. Nc3 O-O 6. O-O Nc6 7. d4 cxd4 8. Nxd4 d6 9. Nxc6 bxc6 10. Bxc6 Rb8 11. Bg2 Qa5 12. Nb5 Bb7 13. Bxb7 {E65: King's Indian: Fianchetto: 6...c5 7 0-0 without d5 by White} Rxb7 14. Bd2 Qa6 15. Bc3 {White has an edge.} Rc8 16. Na3 (16. b3 d5 17. Bxf6 Bxf6 18. Qxd5 Bxa1 19. Rxa1 Rbb8 20. Qe5 Qa5 21. Qxe7 {½-½ (137) Erdos,V (2621)-Navara,D (2718) Bol 2014}) 16... d5 17. cxd5 $146 ({Predecessor:} 17. Qc2 dxc4 18. Rfd1 Qe6 19. Rac1 Bh6 20. Bd2 Bg7 {0-1 (33) Dizdar,G (2470)-Sermek,D (2440) Pula 1991}) 17... Rxc3 $1 18. bxc3 {[#] Strongly threatening Rb1.} Qxa3 19. Qd3 Qc5 ({Black should play} 19... Nd7 $17) 20. Rab1 $11 Rxb1 21. Rxb1 Nxd5 $2 {[%mdl 8192] [#]} (21... h5 $11 {and Black is okay.}) 22. Rb5 $18 Qxc3 (22... Qc6 $142 23. Qxd5 Qxd5 24. Rxd5 Bxc3) 23. Rb8+ Bf8 24. Qxd5 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Pijpers, Arthur"]
[Black "Kristensen, Kaare Hove"]
[Result "1-0"]
[ECO "B65"]
[WhiteElo "2457"]
[BlackElo "2348"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,51,65,53,137,148,142,144,273,314,295,306,300,292,296,295,608,558,815,826,826,820,820,808,825,824,2240,811,797,797,765,754]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O Nxd4 9. Qxd4 O-O 10. f4 Qa5 11. h4 {[%cal Bh2h4,Bh4g5][%mdl 32] B65: Sicilian: Richter-Rauzer: 7...Be7 8 0-0-0 0-0 9 f4 Nxd4} (11. e5 dxe5 12. Qxe5 Qxe5 13. fxe5 Nd5 14. Bxe7 Nxe7 15. Bd3 b6 16. Be4 Rb8 17. Nb5 Bb7 18. Rhe1 a6 19. Nc7 a5 20. Rd7 Ng6 21. Nb5 Bc8 22. Rd6 Nxe5 23. Bxh7+ Kxh7 24. Rxe5 {½-½ (48) Vitiugov,N (2724)-Predke,A (2573) Moscow 2017}) 11... Rd8 12. Qe3 {LiveBook: 5 Games} Bd7 $146 (12... Kf8 $14) ({Predecessor:} 12... h6 13. Bd3 Bd7 14. Qg3 Nh5 15. Qf3 Nf6 16. Qg3 Nh5 17. Qf3 Nf6 18. Qg3 {½-½ (18) Solak,D (2613)-Morovic Fernandez,I (2582) Moscow 2012}) 13. e5 $1 $16 {[%cal Re5f6] White is clearly better.} dxe5 14. fxe5 Ng4 {[#]} (14... Bc5 $16 15. Qg3 Nd5) 15. Qg3 $1 $18 Bxg5+ 16. hxg5 Nxe5 {[#]} 17. Bb5 $1 {[%mdl 512]} a6 (17... Bxb5 18. Qxe5) 18. Qxe5 axb5 $2 (18... Bxb5 19. a4 Qb6) 19. Qe4 {White is clearly winning.} Bc6 20. Qxh7+ Kf8 21. Qh8+ Ke7 22. Qxg7 {Threatening mate with Qf6+.} Rxd1+ 23. Rxd1 Rf8 24. Qe5 (24. Qf6+ $142 Ke8 25. Qe5) 24... Rd8 25. Qf6+ Ke8 26. Rf1 {Precision: White = 87%, Black = 21%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Perske, Thore"]
[Black "Tomov, Georgi"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2413"]
[BlackElo "2273"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,111,20,3,9,9,7,9,5,0,0,0,0,0,-5,-19,-35,-26,0,-6,11,0,0,0,0,0,0,0,13,0,0,0,15,15,17,16,16,14,13,13,33,0,0,0,0,0,0,0,0,0,0,0,30,0,277,8,8,8,80,79,80,80,240,226,578,433,1087,1016,975,769,769,707,1016,1058,1247,1216,1125,908,2481,2478,2589,3426,2816,2864,4610,4610,29973,29976,29977,29978,29977,29977,29977,29978,29976,29977]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Ne7 6. O-O c5 7. dxc5 Nec6 {B12: Caro-Kann: Advance Variation} 8. a3 (8. Be3 Nd7 9. c4 dxc4 10. Bxc4 Bxc5 11. Qe2 Bxe3 12. Qxe3 Qb6 13. Qxb6 axb6 14. Bb5 Ke7 15. Bxc6 bxc6 {0-1 (52) Akopian,V (2648)-Ivanchuk,V (2726) Berlin 2015}) 8... Bxc5 9. b4 Bb6 10. Bb2 {LiveBook: 4 Games} Nd7 11. c4 O-O $146 ({Predecessor:} 11... dxc4 12. Nbd2 c3 13. Bxc3 O-O 14. Nc4 Bc7 15. b5 {0-1 (22) Jimenez Fraga,P (2463)-Obregon Rivero,J (2509) Havana 2014}) 12. cxd5 exd5 13. b5 Ne7 14. Nc3 Nc5 15. Nd4 Bg6 16. Na4 Nxa4 17. Qxa4 Qc7 18. e6 Qd6 19. Qb4 Qxb4 20. axb4 Nf5 21. exf7+ Rxf7 22. Rfd1 Raf8 23. Bf3 Nxd4 24. Bxd4 Be4 25. Bxe4 dxe4 26. Bxb6 axb6 $11 {[%mdl 4096] Endgame KRR-KRR} 27. Ra2 h6 28. h3 Rf4 29. Rd4 e3 30. fxe3 Rxd4 31. exd4 {KR-KR} Rf5 32. Rb2 h5 33. Kh2 Rd5 34. Rd2 Rxb5 35. Kg3 g5 $2 {[%mdl 8192] [#]} (35... Kf7 $11 {and Black is okay.}) 36. Kf3 $2 (36. d5 $18 h4+ 37. Kf3 Rxb4 38. d6 Rf4+ 39. Ke3) 36... Kf7 37. Ke4 Rxb4 (37... h4 $11 {keeps the balance.}) 38. Kf5 $16 g4 {[#]} 39. h4 $1 Rb5+ $2 (39... Rc4 $16) 40. d5 $18 Ke7 $2 (40... Rc5 {is tougher.} 41. Kg5 b5) 41. Kg5 Kd6 (41... Ra5 $142 42. Kxh5 Kd6) 42. Kxh5 g3 43. Kg4 Rb1 44. Kxg3 b5 45. Kg4 b4 46. Kh5 b3 47. g4 b5 48. g5 Rc1 49. g6 Rc2 50. Rd1 b2 51. g7 Rc1 52. g8=Q {White mates.} Rxd1 53. Qg3+ Kc5 54. Qc3+ Kb6 55. Qxb2 Rxd5+ 56. Kg4 {Precision: White = 61%, Black = 37%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Van Delft, Merijn"]
[Black "Vrolijk, Liam"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2384"]
[BlackElo "2419"]
[Annotator "TA"]
[PlyCount "32"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,27,13,20,5,15,15,14,8,16,13,11,11,11,11]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 O-O {The position is equal.} 9. Nc3 {[%cal Bb1c3,Bc3d5,Bd5e3,Be3f5,Bf5e7][%mdl 32] C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4} (9. d4 Bf6 10. Re1 Nf5 11. d5 d6 12. Nd2 Re8 13. Ne4 Bd7 14. c3 h6 15. Bd3 Nh4 16. g3 Ng6 17. f4 c6 18. Be3 {½-½ (70) Anand,V (2786)-Kramnik,V (2808) Leuven 2017}) 9... Ne8 (9... Bf6 $5 {[%cal Rf6e5]} 10. Re1 Re8 $11) 10. Nd5 Bd6 11. Re1 c6 12. Ne3 Bc7 13. Nf5 d5 14. Ne7+ {[#]} {Predecessor:} Kh8 $146 15. Nxc8 Rxc8 16. d4 Nf6 {½-½ (29) Kuzubov,Y (2637)-Naiditsch,A (2700) Minsk 2017} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Warmerdam, Max"]
[Black "Ikonnikov, Vyacheslav"]
[Result "1/2-1/2"]
[ECO "B32"]
[WhiteElo "2357"]
[BlackElo "2538"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,71,50,54,51,51,30,51,41,51,51,51,21,51,51,78,65,77,70,86,58,108,106,127,110,112,72,81,42,49,37,54,39,80,0,0,0,0,0,0,0,0,2,0,1]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. c4 Be7 7. N1c3 a6 8. Na3 Be6 9. Be2 Bg5 10. O-O Bxc1 11. Rxc1 Nf6 12. Nc2 O-O 13. Qd2 Qb8 14. Rfd1 {B32: Sicilian: Löwenthal and Kalashnikov Variations} Rd8 15. Qe3 (15. f3 Qa7+ 16. Kh1 Rac8 17. Nd5 Bxd5 18. cxd5 Ne7 19. g3 Rc5 20. b4 Rc7 21. Ne3 Rdc8 22. Rxc7 Rxc7 {0-1 (47) Warmerdam,M (2181)-Ikonnikov,V (2570) Delft 2014}) 15... Qa7 {LiveBook: 3 Games} 16. Qxa7 {White is slightly better.} Nxa7 {[#]} 17. Rd2 $146 ({Predecessor:} 17. f3 Rac8 18. b3 Kf8 19. Nb4 Nc6 20. Nxc6 Rxc6 21. Nd5 Rdc8 22. Nb4 Rb6 23. Nd5 Rbc6 24. Nb4 Rb6 25. Nd5 {½-½ (25) Asrian,K (2515)-Sveshnikov,E (2570) St Petersburg 1997}) 17... Kf8 18. Rcd1 Ke7 19. f3 Rac8 20. Na4 Rc7 21. b3 $36 {[%mdl 2048] White has the initiative.} Nc8 22. Nb4 Rdd7 23. Kf2 g6 24. g3 Nh5 25. Nc3 {Strongly threatening Ncd5+.} Nf6 26. f4 a5 27. Nc2 b5 28. fxe5 ({Much weaker is} 28. Nxb5 $6 Nxe4+ 29. Kg2 Rc5 $11) 28... dxe5 {[%cal Rb5c4]} 29. Rxd7+ Bxd7 30. Ne3 Nb6 31. Ncd5+ ({Much worse is} 31. Nxb5 Bxb5 32. cxb5 Nxe4+ 33. Ke1 Nd6 $11) (31. g4 $16 {Threatens to win with g5.} h6 32. h4 (32. Nxb5 Bxb5 33. cxb5 Nxe4+ 34. Ke1 Rc8 $11) 32... bxc4 33. bxc4) 31... Nbxd5 $11 {The position is equal.} 32. Nxd5+ Nxd5 33. Rxd5 bxc4 34. Bxc4 a4 35. Rxe5+ Be6 $1 36. Bxe6 {Precision: White = 63%, Black = 49%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Slingerland, Fred"]
[Black "Nijboer, Friso"]
[Result "1/2-1/2"]
[ECO "C12"]
[WhiteElo "2335"]
[BlackElo "2528"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,110,0,0,0,0,0,-20,0,-27,25,29,28,26,29,12,19,18,25,21,23,0,0,0,0,0,0,-34,0,0,0,0,0,0,6,-16,-9,-16,0,-21,-13,-32,-22,-33,-21,-41,-45,-62,-9,-10,-10,-11,-11,-11,0,0,0,0,0,0,0,0,0,0,0,0,8,7,96,95,89,89,89,97,104,30,72,8,8,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. exd5 Qxd5 6. Bxf6 Bxc3+ 7. bxc3 gxf6 8. Qg4 {C12: French: Classical System: McCutcheon Variation} (8. Qd2 Qa5 9. Bd3 Bd7 10. Ne2 Bc6 11. f3 Nd7 12. c4 Qxd2+ 13. Kxd2 Nb6 14. h4 Rg8 15. Rhg1 Rd8 16. Ke3 {½-½ (69) Hou,Y (2652)-Vallejo Pons,F (2710) Moscow 2017}) 8... Qa5 9. Ne2 {LiveBook: 3 Games} Bd7 10. Qg7 Rf8 11. Qxf6 Bc6 12. Qe5 $146 (12. Qh4 {seems wilder.} Nd7 13. f3 Nb6 14. Kf2 h5 15. g3) ({Predecessor:} 12. h4 Nd7 13. Qg5 Qa3 14. Rh3 Be4 15. Qc1 Qa4 {1-0 (31) Huerga Leache,M (2440)-Plazuelo Pascual,J (2139) Madrid 2014}) 12... Qxe5 (12... Bd5 $142 $1) 13. dxe5 $11 Nd7 14. f4 O-O-O 15. Nd4 Bd5 16. c4 Be4 17. O-O-O Nc5 18. Nb3 Rxd1+ 19. Kxd1 Rd8+ 20. Kc1 Na4 $1 21. Nd2 Bc6 22. Bd3 Nc5 23. Be2 $1 Bxg2 24. Rg1 Bh3 $1 25. Bg4 Bxg4 26. Rxg4 {[%mdl 4096] Endgame KRN-KRN} Kd7 27. Rg7 Ke7 28. Rxh7 Rd4 29. Rh4 Na4 30. Rg4 Nc3 31. a3 $1 Rxf4 ({Black should try} 31... b6 $15) 32. Rxf4 Ne2+ 33. Kd1 Nxf4 {KN-KN} 34. Nf3 f6 35. exf6+ Kxf6 36. Kd2 e5 37. Ke3 Ne6 38. h4 c6 39. Nd2 Nd4 40. Kd3 Nf5 41. h5 Nh6 (41... Kg7 $11 {remains equal.}) 42. Ne4+ $16 Kf5 43. Nd6+ Kf4 44. Nxb7 {Strongly threatening Nd8.} e4+ 45. Ke2 (45. Kd2 $16) 45... Nf5 $11 46. Ke1 (46. Nd8 $16) 46... Kg5 {The position is equal.} 47. Nc5 Nd6 48. Ke2 Kxh5 49. Ke3 Nxc4+ 50. Kxe4 Nxa3 51. c3 Nb5 52. Ke5 Nxc3 53. Kd6 a5 54. Kxc6 a4 {[#]} 55. Nxa4 $1 {[%mdl 512]} Nxa4 {Precision: White = 63%, Black = 52%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Ypma, Peter"]
[Black "Beerdsen, Thomas"]
[Result "1/2-1/2"]
[ECO "A46"]
[WhiteElo "2283"]
[BlackElo "2452"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,76,-10,-10,-15,0,-1,-4,0,16,-23,-37,-28,-14,-44,-24,-21,-45,-51,-52,-42,0,0,38,0,75,83,84,99,113,122,82,100,82,54,75,54,52,63,58,63,64,68,68,43,43,20,75,65,71,65,65,51,55,47,67,59,63,58,62,75,97,104,96,93,91,92,91,91,95]} 1. d4 Nf6 2. Bf4 e6 3. Nf3 Be7 4. h4 $146 ({Predecessor:} 4. c3 c5 5. e3 Nh5 6. Bxb8 Rxb8 7. Nbd2 O-O 8. Bd3 b6 9. g4 Nf6 10. h4 cxd4 11. cxd4 Bb7 {0-1 (26) Salomon,J (2501)-Moiseenko,A (2676) Khanty-Mansiysk 2017}) 4... c5 5. c3 Nc6 6. e3 {A46: 1 d4 Nf6 2 Nf3 e6: Torre, London and Colle Systems} b6 7. Nbd2 Bb7 8. Bd3 {The position is equal.} h6 9. Rh3 d6 10. Qe2 Qc7 11. e4 cxd4 12. Nxd4 e5 13. Nxc6 Bxc6 14. Be3 O-O-O 15. c4 Nd7 16. b4 Nf8 (16... f5 $11 17. b5 Bxb5) 17. a4 $16 Ne6 18. a5 Nf4 19. Bxf4 $1 exf4 20. axb6 axb6 21. Bc2 Kb7 22. Rha3 Ra8 23. Qf3 {[#] Black must now prevent b5.} Bf6 24. Rxa8 Rxa8 25. Rxa8 Kxa8 26. b5 Bb7 27. Qxf4 Qe7 (27... Qc5 $11 {keeps the balance.}) 28. Qe3 Ka7 29. g3 $36 {[%mdl 2048] White fights for an advantage.} Qe5 30. Qa3+ Kb8 31. Nf3 Qe7 32. Qd3 Qc7 33. Nd4 Qc5 34. Nf5 Be5 {White is better.} 35. f4 Qg1+ 36. Kd2 Bb2 {[#]} 37. Bd1 $1 Qf2+ 38. Be2 Qg1 {Precision: White = 63%, Black = 67%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Caglar, Sila"]
[Black "Kuipers, Stefan"]
[Result "0-1"]
[ECO "C47"]
[WhiteElo "1976"]
[BlackElo "2388"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,114,11,13,0,7,5,-87,-87,-87,-88,-88,-94,-99,-93,-94,-83,-108,-108,-108,-108,-124,-124,-118,0,-108,-108,-108,-108,-122,-116,-122,-125,-122,-117,-146,-116,-123,-115,-117,-108,-108,-108,-109,-52,-52,-49,-41,-37,-40,-17,-67,-43,-43,-39,-54,-48,-66,0,-6,-7,0,0,-47,-37,-50,-39,-77,-43,-43,-42,-72,-66,-66,-66,-66,-66,-66,-56,-66,-66,-66,-71,-187,0,-266,-261,-403,-395,-379,-382,-362,-345,-1114,-1079,-1039,-1005,-1295,-1272,-1049,-1034,-1153,-1139,-1070,-1069]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bc5 6. Nxc6 bxc6 7. Bc4 {Black must now prevent e5.} O-O {C47: Scotch Four Knights and Four Knights with 4 g3} 8. O-O Qe7 (8... d6 9. Bg5 Qe7 10. Qf3 Bd4 11. Rae1 Qe5 12. Bf4 Qa5 13. e5 dxe5 14. Bg5 Bxc3 15. bxc3 Nd5 16. Rxe5 Ba6 17. Bxa6 Qxa6 {½-½ (38) Zidu,J (2533)-Kleinert,S (2503) Remote email 2013}) 9. Re1 {[#]} (9. Qf3 $11) 9... Bxf2+ $1 $17 {[%mdl 512] Black is better.} 10. Kxf2 Qc5+ 11. Be3 Qxc4 12. Kg1 $146 ({Predecessor:} 12. Bd4 Ng4+ 13. Kg1 d6 14. b3 Qe6 15. Nb1 {½-½ (39) Lin,A (2180)-Vang,T Ho Chi Minh City 2003}) 12... d6 $1 (12... Nxe4 13. Nxe4 Qxe4 14. Bc5 $14) 13. Qd4 Qe6 14. h3 Re8 15. Bg5 Nd7 16. Rf1 Ne5 17. Bf4 Nd7 (17... Qg6 $17 18. Kh1 Nd7) 18. Rae1 (18. Bg5 $1 $11 {was the only way to keep the balance.}) 18... f6 19. Bg3 Bb7 20. Qb4 Nb6 21. a4 a5 22. Qd4 c5 23. Qd1 Bc6 24. b3 Rab8 25. Rf5 Qf7 26. Bf2 Qg6 {...Bxe4! is the strong threat.} 27. Qd3 Re5 (27... Re7 $17 28. Rf4 Rbe8) 28. Rxe5 $15 fxe5 29. Nb5 Qf7 30. Rf1 Qd7 31. Be1 {[#]} c4 $1 {[%mdl 512]} 32. bxc4 Nxa4 33. Bxa5 Nc5 (33... Bxb5 34. Qd5+ Kh8 35. Qxb5 $1 $16 {[%mdl 512]}) 34. Qd1 Rc8 (34... Bxe4 35. Bxc7 Rc8 36. Bxd6 $16 (36. Qxd6 Qxd6 37. Bxd6 Nd7 $14)) (34... Nxe4 $15 35. Nxc7 Nf6) 35. Na7 $11 Ra8 (35... Bxe4 $6 36. Nxc8 Qxc8 37. Bb4 $16) 36. Nxc6 Qxc6 37. Qf3 {Intending Qf7+ and mate.} (37. Bxc7 $5 Nxe4 38. Qf3 Qxc7 39. Qxe4 Qc5+ 40. Kh2 $11) 37... Qd7 (37... Qxe4 38. Qf7+ Kh8 39. Qf8+ $1 {[%mdl 512]} Rxf8 40. Rxf8#) 38. Bd2 Qe6 $36 {[%mdl 2048] Black has some pressure.} 39. Qe2 h6 {Threatens to win with ...Ra4.} 40. Bb4 Nd7 41. Qd3 c5 42. Bc3 Nb6 43. Rb1 Ra6 44. Kh2 Kh7 ({Not} 44... Qxc4 45. Rxb6 $1 {[%mdl 512]} Qxd3 46. Rb8+ Kf7 47. cxd3 $16) 45. Rb3 Nxc4 46. Rb7 Ra3 47. Rc7 {[#]} (47. Rb3 $17 {keeps fighting.}) 47... Nb2 $1 {[%mdl 512]} 48. Qg3 $2 {[%mdl 8192]} (48. Qf3 $1 $11) (48. Bxb2 Rxd3) 48... Qf6 $19 49. Qe1 (49. Bxe5 $142 Qxe5 50. Qxe5 dxe5 51. Rxc5) 49... Qf4+ 50. Kg1 ({Don't go for} 50. g3 $2 Qf3 $19) 50... Nc4 51. Rd7 Qg5 {aiming for ...Ne3.} ({Don't play} 51... Ne3 52. Bd2 $19) 52. Kh2 $2 (52. Rf7 Qe3+ 53. Qxe3 Nxe3 54. Be1) 52... Ne3 {[%csl Ge3][%cal Rg5g2] Black is clearly winning.} 53. g3 Nxc2 54. Qd2 Qxd2+ 55. Bxd2 Nd4 56. Kh1 Ra1+ 57. Kg2 Ra2 {Precision: White = 51%, Black = 67%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Koelmans, Jan Willem"]
[Black "Van Deutekom, Yde"]
[Result "1/2-1/2"]
[ECO "A52"]
[WhiteElo "1916"]
[BlackElo "1858"]
[Annotator "NA"]
[PlyCount "41"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:05]} 2. c4 {[%emt 0:00:00]} e5 {[%emt 0:00:11]} 3. dxe5 {[%emt 0:00:00]} Ng4 {[%emt 0:00:08]} 4. Nf3 {[%emt 0:00:11]} Bc5 {[%emt 0:00:22]} 5. e3 {[%emt 0:00:11]} Nc6 {[%emt 0:00:28]} 6. Be2 {[%emt 0:00:28]} Ngxe5 {[%emt 0:01:29]} 7. O-O {[%emt 0:00:36]} O-O {[%emt 0:00:22]} 8. Nc3 {[%emt 0:01:11]} a6 {[%emt 0:07:10]} 9. a3 {[%emt 0:04:50]} h6 {[%emt 0:07:47]} 10. b4 {[%emt 0:00:46]} Be7 {[%emt 0:02:46]} 11. Nxe5 {[%emt 0:10:52]} Nxe5 {[%emt 0:00:22]} 12. Nd5 {[%emt 0:00:10]} Bf6 {[%emt 0:01:49]} 13. Nxf6+ {[%emt 0:01:48]} Qxf6 {[%emt 0:00:34]} 14. Qd4 {[%emt 0:01:49]} Qe7 {[%emt 0:05:18]} 15. Bb2 {[%emt 0:01:28]} f6 {[%emt 0:00:05]} 16. c5 {[%emt 0:00:39]} d6 {[%emt 0:05:42]} 17. cxd6 {[%emt 0:00:24]} Qxd6 {[%emt 0:00:03]} 18. Qxd6 {[%emt 0:00:45]} cxd6 {[%emt 0:00:02]} 19. Rfd1 {[%emt 0:00:55]} Be6 {[%emt 0:02:36]} 20. Rxd6 {[%emt 0:06:17]} Bc4 {[%emt 0:01:08]} 21. Bxe5 {[%emt 0:01:30]} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Coiffait, Casimir"]
[Black "Holwijn, Melvin"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "1853"]
[BlackElo "1932"]
[Annotator "NA RC"]
[PlyCount "99"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 {[%emt 0:00:00]} e5 {[%emt 0:00:16]} 2. Bc4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:20]} 3. d3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:27]} 4. Nf3 {[%emt 0:00:00]} Be7 {[%emt 0:00:31]} 5. c3 {[%emt 0:00:19]} O-O {[%emt 0:00:36]} 6. O-O {[%emt 0:00:08]} d6 {[%emt 0:00:24]} 7. Bb3 {[%emt 0:00:12]} Nh5 {[%emt 0:03:07] C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack} (7... Na5 8. Bc2 c5 9. h3 Nc6 10. Re1 Qc7 11. Nbd2 Be6 12. Nf1 Nd7 13. Ng5 Bxg5 14. Bxg5 d5 15. exd5 Bxd5 16. Ne3 Be6 17. Qh5 Rfe8 18. b4 Nf8 19. bxc5 Qa5 20. d4 exd4 21. cxd4 Nxd4 22. Bf4 Nxc2 23. Nxc2 Qa4 {0-1 (23) Bortnyk,O (2588)-Wang,H (2712) Abu Dhabi 2016}) 8. d4 {[%emt 0:16:16]} Nf6 {[%emt 0:07:11]} 9. Bc2 {[%emt 0:02:22]} Bg4 $146 {[%emt 0:01:43]} ({Predecessor:} 9... d5 10. h3 b6 11. Re1 Bb7 12. Nbd2 Re8 13. Nf1 Bd6 14. Ng3 Ne7 15. Nxe5 Nc6 16. f4 {1-0 (30) Lagno,K (2355)-Dincok,B Antalya 2002}) 10. Be3 {[%emt 0:08:16]} exd4 {[%emt 0:01:16]} 11. cxd4 {[%emt 0:00:23]} Nb4 {[%emt 0:03:00]} 12. Nbd2 {[%emt 0:00:23]} Nxc2 {[%emt 0:01:55]} 13. Qxc2 {[%emt 0:00:02]} d5 {[%emt 0:00:25]} 14. Ne5 {[%emt 0:05:52]} Be2 {[%emt 0:05:02]} 15. Rfe1 {[%emt 0:00:41]} Ba6 {[%emt 0:00:26]} 16. Bg5 {[%emt 0:11:48]} Re8 {[%emt 0:09:26]} 17. exd5 {[%emt 0:11:02]} Nxd5 {[%emt 0:00:45]} 18. Bxe7 {[%emt 0:00:52]} Rxe7 {[%emt 0:00:31]} 19. Ndf3 {[%emt 0:01:28]} Nb4 {[%emt 0:12:16]} 20. Qb3 {[%emt 0:05:03]} Nd5 {[%emt 0:01:13]} 21. Qc2 {[%emt 0:04:53]} Qd6 {[%emt 0:03:59]} 22. Ng5 {[%emt 0:04:38]} Nf6 {[%emt 0:06:27]} (22... g6 $1 $11) 23. Rad1 {[%emt 0:05:38]} (23. Ng4 $1 $16 {[%cal Rg4f6]} g6 24. Rxe7 Qxe7 25. Nh6+ Kg7 26. Nhxf7) 23... Qd5 {[%emt 0:02:57]} 24. Nef3 {[%emt 0:13:19]} Rae8 {[%emt 0:01:35]} 25. Re5 {[%emt 0:01:00]} Qxa2 {[%emt 0:02:33]} 26. Rde1 {[%emt 0:01:03]} Rxe5 {[%emt 0:02:01]} 27. dxe5 {[%emt 0:00:11]} h6 {[%emt 0:02:16]} 28. exf6 {[%emt 0:05:22]} Rxe1+ {[%emt 0:00:07]} 29. Nxe1 {[%emt 0:00:04]} hxg5 {[%emt 0:00:07]} 30. fxg7 {[%emt 0:00:39]} Qc4 {[%emt 0:00:35]} ({Reject} 30... Kxg7 $6 31. Qf5 $11) 31. Qxc4 {[%emt 0:00:42]} Bxc4 {[%emt 0:00:06]} 32. Nf3 {[%emt 0:00:35]} f6 {[%emt 0:00:08]} ({And not} 32... Kxg7 33. Nxg5 a5 34. f3 $11) 33. Nd2 {[%emt 0:00:03]} Bd3 {[%emt 0:00:51]} 34. Nb3 {[%emt 0:00:32]} Bc4 {[%emt 0:02:17]} 35. Nd2 {[%emt 0:01:15]} Bd5 {[%emt 0:00:22]} 36. f3 {[%emt 0:00:51]} (36. b4 {was necessary.}) 36... Kxg7 {[%emt 0:00:14]} 37. Kf2 {[%emt 0:00:14]} f5 {[%emt 0:01:02]} 38. Ke3 {[%emt 0:01:16]} (38. b4 {might work better.}) 38... c5 {[%emt 0:00:37]} 39. f4 {[%emt 0:00:35]} Kg6 {[%emt 0:01:39]} ({Weaker is} 39... Bxg2 40. fxg5 Kg6 41. h4 $17) 40. g3 {[%emt 0:01:13]} b5 {[%emt 0:31:38]} 41. h3 {[%emt 0:08:29]} a5 {[%emt 0:00:00]} 42. g4 {[%emt 0:00:26]} gxf4+ {[%emt 0:00:00]} 43. Kxf4 {[%emt 0:00:09]} fxg4 $19 {[%emt 0:00:00]} 44. hxg4 {[%emt 0:00:05]} a4 {[%emt 0:00:00]} 45. Ke5 {[%emt 0:00:52]} Bf7 {[%emt 0:00:00]} 46. Kd6 {[%emt 0:00:30]} b4 {[%emt 0:00:00]} 47. Nb1 {[%emt 0:01:26]} c4 {[%emt 0:00:00]} 48. Kc5 {[%emt 0:00:21]} c3 {[%emt 0:00:00]} 49. bxc3 {[%emt 0:00:44]} a3 {[%emt 0:00:00]} 50. Kd4 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Ikonnikov, Vyacheslav"]
[Black "Lai, Hing Ting"]
[Result "1-0"]
[ECO "E44"]
[WhiteElo "2538"]
[BlackElo "2393"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,67,12,14,18,-24,34,26,39,26,27,20,44,52,58,30,79,52,54,60,49,42,76,63,78,56,80,63,94,79,107,103,115,100,159,159,177,168,178,172,158,154,230,239,252,225,222,200,196,196,261,252]} 1. d4 Nf6 {[%cal Bg8f6,Bf6e4,Be4d2][%mdl 32]} 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ne4 6. Bd2 Nxd2 7. Qxd2 O-O {E44: Nimzo-Indian: Rubinstein: 4...b6 5 Ne2} 8. g3 (8. a3 Be7 9. d5 exd5 10. cxd5 c5 11. d6 Bf6 12. Nd5 Nc6 13. Rd1 Bb7 14. Nec3 Be5 15. Nc7 Rc8 16. Ba6 Na5 17. Bxb7 Nxb7 {0-1 (50) Kozionov,K (2437)-Rozum,I (2599) Voronezh 2017}) 8... Ba6 9. a3 Be7 10. b3 {LiveBook: 4 Games} Nc6 11. Nf4 $146 ({Predecessor:} 11. Bg2 Na5 12. Qc2 c6 13. c5 Nb7 14. b4 Bc4 15. O-O Qc7 16. Ne4 b5 {½-½ (29) Feldmann,G (2000)-Lafarga Santorroman,D (2260) IECG email 2001}) 11... e5 (11... Na5 $11 12. Qb2 Bb7) 12. dxe5 $14 Nxe5 13. Be2 Bb7 14. Nfd5 c6 15. Nxe7+ Qxe7 16. O-O (16. f4 $5 {[%cal Rf4e5]} Ng6 17. O-O $14) 16... c5 17. Nd5 (17. f4 $5 {[%cal Rf4e5]} Nc6 18. Nd5 $16) 17... Bxd5 18. Qxd5 d6 19. Rad1 Rfd8 20. Rd2 Rac8 21. Rfd1 Rc7 22. Kg2 Ng6 23. Qf5 Nf8 24. Bf3 Ne6 25. h4 Nf8 ({Black should play} 25... g6 26. Qc2 h5) 26. Qg5 $16 f6 27. Qd5+ Kh8 28. Qe4 Qxe4 29. Bxe4 Kg8 (29... g6 $16 30. g4 (30. Rxd6 Rcd7 $16) 30... Re7) 30. Rxd6 $18 Rcd7 31. Rxd7 Rxd7 32. Rxd7 Nxd7 33. f4 g6 (33... h6 $142 34. Kh3 Nf8) 34. g4 {Precision: White = 81%, Black = 30%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Nijboer, Friso"]
[Black "Warmerdam, Max"]
[Result "1/2-1/2"]
[ECO "E81"]
[WhiteElo "2528"]
[BlackElo "2357"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,134,40,10,23,0,0,0,7,0,0,0,7,0,0,0,0,-5,0,-22,14,-34,12,-19,0,0,34,11,47,15,31,15,23,16,21,-57,0,-3,8,-8,-14,-29,-13,-34,-23,-286,-281,-286,-282,-274,-241,-528,-522,-512,-275,-281,-269,-279,-270,-260,-260,-257,-252,-246,-241,-241,-241,-220,-176,-180,-24,-24,-24,-24,-20,-20,-20,-20,0,-20,0,-20,-20,-20,-20,-20,-20,-20,-16,-16,-16,-20,-20,-20,-20,-28,-12,-12,-12,-28,-28,-28,-28,-28,-28,-28,-28,-28,-30,-52,-52,-61,-61,-61,-61,-68,-68,-83,8]} 1. d4 Nf6 2. c4 g6 3. f3 Bg7 4. e4 d6 5. Nc3 O-O 6. Be3 c6 7. Bd3 a6 8. Nge2 Nbd7 9. O-O b5 10. Rc1 e5 {E81: King's Indian: Sämisch: 6th move deviations (including 6 Be3 c6)} (10... Bb7 11. Qd2 bxc4 12. Bxc4 d5 13. Bb3 dxe4 14. fxe4 Ng4 15. e5 Nxe3 16. Qxe3 e6 17. Ne4 c5 18. Nxc5 Nxc5 19. dxc5 {½-½ (69) Richter,M (2517)-Thiede,L (2437) Berlin 2015}) 11. cxb5 (11. d5 $5 {[%cal Rd5c6]} bxc4 12. Bxc4 $14) 11... axb5 12. b4 Bb7 $146 {The position is equal.} ({Predecessor:} 12... exd4 13. Nxd4 Ne5 14. h3 Be6 {1-0 (42) Shakhov,M (1792)-Novy,F (1824) Maribor 2012}) 13. Qb3 exd4 14. Nxd4 Re8 15. Bf2 Ne5 16. Be2 Nh5 17. g3 Nf6 18. Rfe1 Qe7 19. h3 Ned7 (19... Qd7 $5 {[%cal Rd7h3]} 20. Kg2 Bc8 $11) 20. a4 bxa4 21. Nxa4 Rac8 (21... Nxe4 $5 22. Bf1 (22. fxe4 Bxd4 23. Bxd4 Qxe4 $17) 22... Bxd4 23. Bxd4 Nd2 $15) 22. Bf1 c5 23. bxc5 Nxc5 24. Nxc5 dxc5 25. Nb5 {Black must now prevent e5.} Nd7 26. Qd1 (26. f4 $11) 26... Red8 ({Black should try} 26... Ne5 $1 $15) 27. Nd6 (27. Qd6 $5 {[%cal Rd6e7]} Qf8 28. Be2 $11) 27... Rb8 {[%cal Bc8b8,Bb8b7,Bb7b2][%mdl 32]} 28. Nxb7 Rxb7 29. Qe2 Ne5 30. Bxc5 Qg5 $36 {[%mdl 2048] Black fights for an advantage.} 31. g4 $2 {[%mdl 8192] [#]} (31. Bf2 $11 {and White has nothing to worry.} Nd3 32. f4 Nxc1 33. Rxc1) 31... Rb2 $1 {[%mdl 512]} 32. Qe3 (32. Qxb2 Nxf3+) 32... Qxe3+ 33. Rxe3 {f4 is the strong threat.} Bh6 34. Bg2 $2 (34. Rce1 {was called for.} Bxe3+ 35. Rxe3) 34... Rdd2 $19 35. Bh1 {If only White now had time for Ra3....} Nd3 36. Rxd3 Rxd3 37. Rf1 Be3+ 38. Bxe3 Rxe3 {[%mdl 4096] Endgame KRR-KRB} 39. h4 Ree2 40. f4 Rh2 41. Bf3 Rxh4 42. Rf2 Rxf2 43. Kxf2 {[#] KR-KB} h6 $2 (43... Rh2+ $1 $19 44. Bg2 f6) 44. Kg3 $11 g5 45. e5 Kf8 46. Bg2 Ke7 (46... f6 $5 47. exf6 Kf7 $17) 47. Bf3 Kf8 48. Bg2 Kg8 49. Bd5 Kg7 50. Bf3 f6 51. exf6+ $1 Kxf6 52. Bg2 Ke6 (52... h5 $5 {[%cal Rh4g4]} 53. fxg5+ Kxg5 54. gxh5 Rxh5 $11) 53. Bf3 Kd6 54. Bg2 Kc5 55. Ba8 Kd4 56. Bf3 Ke3 57. f5 h5 $1 {[%cal Rh5g4] Strongly threatening ...hxg4.} 58. gxh5 (58. f6 $5 {[%cal Rf6f7]} hxg4 59. Bd5 $11) 58... Kd4 {Threatens to win with ...Rf4.} 59. f6 Ke5 60. f7 Rf4 61. h6 Rxf7 {Hoping for ...Rf4.} 62. Kg4 Kf6 {aiming for ...Kg6.} 63. Be4 Re7 64. Bc2 Rc7 65. h7 Rc4+ 66. Kg3 Kg7 67. Bb1 Rc2 {Precision: White = 59%, Black = 47%.} ({Black should play} 67... Kh8 $17 68. Bg6 Kg7) 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Pruijssers, Roeland"]
[Black "Slingerland, Fred"]
[Result "1-0"]
[ECO "B56"]
[WhiteElo "2508"]
[BlackElo "2335"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,67,24,21,22,18,22,40,34,40,32,66,48,54,43,39,29,64,46,64,54,111,70,168,128,192,161,189,146,182,175,341,332,518,439,606,606,590,601,1452,1345,1693,1693,1694,1685,1566,1159,29992,29993]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f3 b5 10. Kb1 Be7 11. Nxc6 Bxc6 12. h4 {B67: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 Bd7, lines without 9 f4 Be7} Rc8 13. Ne2 Bb7 14. Nd4 {White is slightly better.} Nd7 15. g4 $146 ({Predecessor:} 15. Qe3 O-O 16. g4 Ne5 17. Bxe7 Qxe7 18. g5 Qc7 19. Bd3 d5 {½-½ (62) Bok,B (2322)-Gupta,A (2577) Wijk aan Zee 2010}) 15... Ne5 16. Qe3 h6 17. Bxe7 Qxe7 18. Be2 g6 19. Nb3 Qc7 20. c3 Ke7 (20... h5 $14) 21. Ka1 Nc6 (21... Nd7 $14) 22. Rd2 Ba8 (22... Ne5 $16 {was worth a try.}) 23. Rhd1 Rcd8 24. f4 {[%cal Bf3f4,Bf4f5][%mdl 32]} Qa7 25. Qg3 Qb8 $2 {[#]} (25... Qc7 26. Qf2 Ke8) 26. g5 $18 a5 (26... hxg5 $142 27. Qxg5+ f6) 27. f5 hxg5 28. fxe6 Ne5 29. exf7 gxh4 30. Qg5+ Kxf7 31. Bg4 {[#] White threatens Rf2+ and mate.} Qc7 32. Rf2+ Ke8 33. Qf6 Qh7 34. Rxd6 {Precision: White = 86%, Black = 27%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Gavrilov, Alexei"]
[Black "Ypma, Peter"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "2491"]
[BlackElo "2283"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,110,40,51,39,56,39,91,64,68,37,117,78,123,137,131,143,112,112,147,153,262,153,161,109,113,92,101,83,118,88,96,90,99,93,80,0,0,0,0,0,18,0,39,-9,-8,-8,-8,-8,-8,-8,-8,-20,-20,-63,-68,-79,-80,-102,-8,-8,-8,-8,-8,-8,0,0,0,0,-7,0,0,0,0,-8,-8,-8,-8,-1436,-8,-1941,-1537,-29965,-29966,-29966,-29967,-29966,-29969,-29966,-10855,-29968,-29964,-29969,-29973,-29971,-29974,-29971,-29972,-29987,-29988]} 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. O-O c6 7. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Qc7 8. Ba2 {C41: Philidor Defence} h6 9. Qd3 $146 ({Predecessor:} 9. dxe5 dxe5 10. Nh4 Nc5 11. Nf5 Bxf5 12. exf5 O-O 13. Be3 e4 14. Qe2 Qe5 15. Rae1 Rae8 {0-1 (26) Bok,B (2587)-Rapport,R (2704) Riga 2014}) 9... g5 (9... exd4 $14 10. Nxd4 (10. Qxd4 Ne5 $11) 10... O-O) 10. Be3 {White is better.} Nf8 11. Qc4 Rh7 (11... Ne6 $14) 12. a5 Ng6 13. dxe5 dxe5 14. Nd5 Nxd5 15. exd5 Bd7 16. Rfd1 Qb8 (16... Rg7 $16 17. a6 b6) 17. dxc6 (17. a6 $18) 17... Bxc6 $16 18. Bb3 (18. a6 $18) 18... a6 19. Ba4 Qc8 20. h3 f6 21. Nd2 (21. Qg8+ {feels hotter.} Nf8 22. Bb3 Qf5 23. c3 h5 24. Rd2) 21... Bxa4 22. Qxa4+ Qc6 23. Qxc6+ bxc6 24. g4 (24. Ne4 $16) 24... h5 $11 25. Ne4 hxg4 26. hxg4 Kf7 27. Kg2 Rah8 28. Rh1 (28. Rd7 {looks sharper.} Rh2+ 29. Kf3 R8h3+ 30. Ng3 f5 31. gxf5 e4+ 32. Ke2) 28... Nf4+ 29. Bxf4 $1 Rxh1 30. Rxh1 Rxh1 31. Kxh1 {[#] Hoping for Bd2.} exf4 {[%mdl 4096] Endgame KB-KN} 32. Kg2 Ke6 33. Kf3 f5 34. Nd2 Bc5 35. c3 fxg4+ (35... Ba7 $17) 36. Kxg4 Bxf2 37. Kxg5 Be3 38. Nf3 c5 {[#] Threatens to win with ...c4.} (38... Kd5 $5 {[%cal Rc6c5]}) 39. c4 Bc1 40. b3 Be3 41. Kg6 Bc1 42. Kg5 $1 Be3 43. Kg4 Kf6 44. Ne1 Ke5 {...Kd4 is the strong threat.} 45. b4 $2 {[%mdl 8192]} (45. Nf3+ $11 Ke4 46. Ng5+ Ke5 47. Nf3+ Ke4 48. Ng5+ Kd3 49. Ne6) 45... cxb4 $19 46. Nd3+ $1 Ke4 47. Nxb4 f3 48. Kg3 Bd2 49. Nd5 Be1+ 50. Kh2 Bxa5 51. Kg1 Bd8 {Black mates.} 52. Kf2 Bh4+ 53. Kf1 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 54. Nb6 Kd4 55. Nd7 a4 {Precision: White = 45%, Black = 57%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Beerdsen, Thomas"]
[Black "Shyam, Sundar M."]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2452"]
[BlackElo "2534"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,60,47,-4,34,-1,32,31,10,32,37,-18,-22,-28,-28,-30,-29,-32,-13,-46,-46,-70,-63,-130,-123,-114,-89,-105,-87,-84,-88,-121,-131,-118,-116,-175,-150,-168,-147,-593,-632,-679,-657,-746,-722]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. f4 a6 7. Nxc6 Qxc6 8. Bd3 b5 9. Qe2 Bb7 10. O-O {LiveBook: 17 Games} (10. Bd2 $14) 10... h5 {B43: Sicilian: Kan Variation: 5 Nc3} (10... b4 11. Nd5 Ne7 12. c4 exd5 13. exd5 Qf6 14. f5 Kd8 15. Be3 Nc8 16. Rad1 a5 17. c5 Ba6 18. d6 Bxd3 19. Qxd3 h6 20. Bd4 Qh4 21. Rfe1 f6 22. Qf3 Rb8 23. Re4 {1-0 (23) Zubarev,A (2597)-Philippe,C (2413) Metz 2012}) 11. h3 $146 ({Predecessor:} 11. f5 Nf6 12. Bg5 b4 13. Bxf6 gxf6 14. Nd5 Qc5+ 15. Ne3 Bh6 16. Rae1 e5 17. Kh1 Bxe3 18. Qxe3 {½-½ (31) Stanculescu,C (2096)-Baratosi,D (2140) Buzias 2002}) 11... Nf6 12. a3 Bc5+ {White is slightly better.} 13. Be3 h4 14. Bxc5 (14. Qf2 $14 Bxe3 15. Qxe3) 14... Qxc5+ $11 15. Qf2 Qxf2+ 16. Rxf2 d6 17. Rd1 Rd8 18. Rfd2 Ke7 19. Kf2 Rhg8 20. a4 (20. Kg1 $15) 20... b4 $17 21. Na2 a5 22. c3 Bxe4 23. cxb4 g5 $36 {[%cal Bg7g5,Bg5f4][%mdl 2080] Black is really pushing.} 24. bxa5 gxf4 25. Kf1 Ba8 {Strongly threatening ...Nd5.} 26. Nc3 (26. Nb4 $17) 26... d5 {[%cal Bd6d5,Bd5d4][%mdl 32]} 27. Bb1 {[#]} d4 $1 {[%cal Rd4c3][%mdl 512]} 28. Nb5 $2 {[%mdl 8192]} (28. Rxd4 $17 {nothing else works.} Bxg2+ 29. Kf2) 28... Nd5 $19 {Black is clearly winning.} 29. Rc1 Ne3+ 30. Kg1 Bxg2 {Precision: White = 23%, Black = 72%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Vrolijk, Liam"]
[Black "Sandipan, Chanda"]
[Result "1/2-1/2"]
[ECO "A65"]
[WhiteElo "2419"]
[BlackElo "2575"]
[Annotator "TA"]
[PlyCount "124"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,124,24,0,8,0,34,0,0,0,43,-95,-100,-101,-88,-91,-97,-93,-88,-91,-77,-99,-81,-47,-10,-18,-23,-57,-8,-8,-14,-19,-10,-13,-19,-18,-18,-25,-31,-28,-24,-63,-50,-91,-90,-129,-142,-160,-169,-135,-82,-89,-89,-82,-91,-83,-83,-72,-8,-8,-8,-9,0,0,0,0,0,0,0,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8]} 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f3 Bg7 8. Nge2 O-O 9. Ng3 a6 10. a4 h5 {A65: Modern Benoni: 6 e4} (10... Nbd7 11. Be2 Ne8 12. O-O Rb8 13. f4 Nc7 14. e5 dxe5 15. f5 b5 16. d6 Ne8 17. axb5 axb5 18. Nce4 c4 19. Bg5 {½-½ (28) Aronian,L (2780)-Nepomniachtchi,I (2767) Wijk aan Zee 2017}) 11. Bg5 Qe8 12. Bd3 Nbd7 13. O-O Nh7 14. Be3 {LiveBook: 3 Games} f5 15. Qd2 {[%cal Re4f5]} Ne5 16. Be2 h4 17. Nh1 fxe4 $146 (17... h3 $5) ({Predecessor:} 17... h3 18. g3 fxe4 19. Nxe4 {0-1 (57) Vasilevich,T (2372)-Bodnaruk,A (2463) Sochi 2016}) 18. fxe4 (18. Nxe4 $14 {was forced to keep a grip.} Ng4 19. fxg4 Rxf1+ 20. Rxf1 Qxe4 21. Nf2) 18... h3 $17 19. g3 Ng4 20. Bxg4 Bxg4 21. Nf2 Bd7 22. Bh6 Qe5 23. Nd3 Bxh6 24. Qxh6 Qd4+ 25. Nf2 Qg7 26. Qxg7+ Kxg7 27. e5 $132 {[%mdl 2048] White is not keeping still} dxe5 28. Nd3 Rxf1+ 29. Rxf1 Bf5 30. Nxe5 Nf6 31. Rd1 Re8 32. Nc4 $1 Bc2 33. Rc1 Bb3 34. Nd6 Re7 35. Nc8 Re3 $1 36. d6 Rd3 {...Rd2 is the strong threat.} 37. Re1 {[#]} Rd2 (37... b5 $142 $1 {[%mdl 512]} 38. axb5 axb5) 38. Re2 Rxe2 39. Nxe2 Bxa4 {[%mdl 4096] Endgame KBN-KNN} 40. Nf4 Bd7 41. Nb6 Bf5 ({Black should try} 41... Kf7 $17 {Strongly threatening ...Bf5.} 42. Nxd7 Nxd7) 42. g4 $1 $11 {[%cal Rg4f5] The position is equal.} Bxg4 43. Nd3 Kf7 (43... c4 $5 44. Nc5 Kf7 $15) 44. Nxc5 Bf3 45. d7 Ke7 46. Nc8+ $1 Kd8 47. Nb6 Bd5 48. Nxd5 Nxd5 49. Nxb7+ Kxd7 {KN-KN} 50. Nc5+ Kc6 51. Nxa6 Kb6 52. Nb8 Nf6 {White must now prevent ...Kb7.} 53. Kf2 Kb7 54. Kg3 Kxb8 55. Kxh3 {KN-KPP} Kc7 {With the idea ...Kd6.} 56. Kg3 Kd6 {And now ...Ke5 would win.} 57. Kf4 Ke6 58. b4 Kf7 59. h4 Kg7 60. b5 Kh6 61. Kg3 Nd5 62. Kg4 Nb6 {Precision: White = 76%, Black = 78%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Perske, Thore"]
[Black "Pijpers, Arthur"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2413"]
[BlackElo "2457"]
[Annotator "TA"]
[PlyCount "32"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,32,10,29,10,10,5,9,6,4,1,8,8,10,0,0,-25,-4,-5,-6,-6,-5,-10,12,14,20]} 1. e4 c5 2. Nf3 Nc6 3. Nc3 d6 4. Bb5 Bd7 5. O-O Nf6 6. Bxc6 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7} Bxc6 7. e5 dxe5 8. Nxe5 Qc7 9. Re1 e6 10. Qe2 $146 ({Predecessor:} 10. d3 Bd6 11. Nxc6 Qxc6 12. Bg5 Be7 13. Qe2 h6 {½-½ (56) Andriasian,Z (2460)-Iskusnyh,S (2510) Moscow 2006}) 10... Bd6 11. d3 O-O 12. Bf4 Nd7 13. Nxd7 {The position is equal.} Qxd7 14. Bxd6 Qxd6 15. Qe5 Qxe5 16. Rxe5 b6 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Kuipers, Stefan"]
[Black "Van Delft, Merijn"]
[Result "1/2-1/2"]
[ECO "B97"]
[WhiteElo "2388"]
[BlackElo "2384"]
[Annotator "NA"]
[PlyCount "41"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 8,41,25,22,16,14,25,6,0,0,0,32767,32767,32767,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,32767,0]} 1. e4 {[%emt 0:00:00]} c5 {[%emt 0:00:06]} 2. Nf3 {[%emt 0:00:00]} d6 {[%emt 0:00:04]} 3. d4 {[%emt 0:00:00]} cxd4 {[%emt 0:00:07]} 4. Nxd4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:08]} 5. Nc3 {[%emt 0:00:00]} a6 {[%emt 0:00:03]} 6. Bg5 {[%emt 0:00:02]} e6 {[%emt 0:05:42]} 7. f4 {[%emt 0:01:06]} Qb6 {[%emt 0:00:18]} 8. Qd2 {[%emt 0:01:16]} Qxb2 {[%emt 0:00:28]} 9. Rb1 {[%emt 0:00:08]} Qa3 {[%emt 0:00:11]} 10. f5 {[%emt 0:01:19]} Nc6 {[%emt 0:05:39]} 11. fxe6 {[%emt 0:01:56]} fxe6 {[%emt 0:00:09]} 12. Nxc6 {[%emt 0:00:21]} bxc6 {[%emt 0:00:09]} 13. Be2 {[%emt 0:00:12]} Be7 {[%emt 0:00:33]} 14. O-O {[%emt 0:00:20]} O-O {[%emt 0:00:57]} 15. Rb3 {[%emt 0:01:22]} Qc5+ $1 {[%emt 0:01:08]} 16. Be3 {[%emt 0:00:08]} Qe5 {[%emt 0:00:39]} 17. Bd4 {[%emt 0:00:13]} Qa5 $1 {[%emt 0:00:15]} 18. Bb6 {[%emt 0:00:06]} Qe5 {[%emt 0:00:20]} 19. Bd4 {[%emt 0:00:19]} Qa5 {[%emt 0:00:25]} 20. Bb6 {[%emt 0:00:05]} Qe5 {[%emt 0:00:47]} 21. Bd4 $11 {[%emt 0:00:09] LiveBook: 140 Games} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Le Clercq, Maxim"]
[Black "Coiffait, Casimir"]
[Result "1/2-1/2"]
[ECO "A47"]
[WhiteElo "1906"]
[BlackElo "1853"]
[Annotator "NA RC"]
[PlyCount "139"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 13,131,-14,32767,32767,32767,7,32767,32767,0,-17,32767,32767,32767,32767,32767,-21,47,60,98,64,82,49,90,71,74,32767,32767,32767,32767,-74,-46,38,-50,-53,-63,-161,32767,-135,-137,-151,-97,32767,32767,32767,32767,32767,-40,-74,-13,32767,-13,-23,-25,32767,32767,32767,32767,-31,-20,32767,-134,-156,37,27,47,-235,13,28,24,31,39,45,46,0,0,0,87,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,43,5297,5051,5069,6156,5314,6029,12841,0,32767,32767,32767,32767,0,0,0,0]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:07]} 2. Bf4 {[%emt 0:00:39]} e6 {[%emt 0:00:09]} 3. Nf3 {[%emt 0:00:49]} b6 {[%emt 0:00:40]} 4. e3 {[%emt 0:06:14]} Bb7 {[%emt 0:00:34]} 5. Bd3 {[%emt 0:01:15]} c5 {[%emt 0:00:09]} 6. c3 {[%emt 0:01:59]} Be7 {[%emt 0:00:20]} 7. Nbd2 {[%emt 0:01:05]} cxd4 {[%emt 0:00:08]} 8. exd4 {[%emt 0:01:04]} O-O {[%emt 0:00:30]} 9. h4 {[%emt 0:07:37] A47: 1 d4 Nf6 2 Nf3 b6: Torre, London and Colle Systems} d6 {[%emt 0:03:49]} 10. Qe2 {[%emt 0:03:42]} Nbd7 {[%emt 0:04:16]} 11. O-O-O {[%emt 0:08:51]} (11. Bg5 a6 12. Ne4 Bxe4 13. Bxe4 Nxe4 14. Qxe4 b5 15. O-O Nb6 16. Bxe7 Qxe7 {½-½ (56) Winants,L (2545)-Naiditsch,A (2709) Tromsoe 2014}) 11... Nd5 {[%emt 0:19:58]} 12. Bh2 $146 {[%emt 0:04:12]} ({Predecessor:} 12. Bg5 N7f6 13. Ne4 Rc8 14. Nxf6+ Bxf6 {0-1 (73) Pacheco,D (2312)-Palu,A (2170) Mina Clavero 2016}) 12... N7f6 {[%emt 0:01:43]} 13. Ng5 {[%emt 0:04:43]} b5 {[%emt 0:00:40]} 14. Kb1 {[%emt 0:01:48]} b4 {[%emt 0:02:50]} 15. c4 {[%emt 0:00:54]} Nb6 {[%emt 0:04:26]} 16. Bf4 {[%emt 0:07:40]} Nbd7 {[%emt 0:23:56]} ({Don't go for} 16... Bxg2 $2 17. Rhg1 $18) 17. Ndf3 {[%emt 0:07:34]} b3 {[%emt 0:10:45]} (17... Qb6 $14) 18. axb3 {[%emt 0:03:23]} Qb6 {[%emt 0:00:58]} 19. Rh3 {[%emt 0:07:28]} a5 {[%emt 0:10:24]} 20. Qc2 {[%emt 0:15:59]} h6 {[%emt 0:02:33]} 21. Nh7 {[%emt 0:02:33]} (21. Bd2 $11) 21... Nxh7 {[%emt 0:03:04]} 22. Bxh7+ {[%emt 0:00:02]} Kh8 {[%emt 0:00:06]} 23. Ng5 {[%emt 0:01:20]} Nf6 {[%emt 0:06:40]} ({But not} 23... Bxg2 $6 24. Rg3 $11) ({Don't blunder} 23... hxg5 $2 24. hxg5 g6 25. Bxg6+ Kg8 26. Rh7 $18) 24. Bd3 {[%emt 0:01:09]} (24. d5 $17) 24... a4 {[%emt 0:01:00]} 25. b4 {[%emt 0:05:58]} Qxb4 {[%emt 0:01:25]} 26. Bf1 {[%emt 0:02:07]} a3 {[%emt 0:01:29]} ({Better is} 26... Kg8 27. Bd2 Qb6) 27. Rb3 {[%emt 0:00:39]} a2+ {[%emt 0:00:04]} 28. Ka1 {[%emt 0:00:02]} Qa4 {[%emt 0:00:05]} 29. Qd3 {[%emt 0:02:33]} Bc6 {[%emt 0:01:33]} ({Black should play} 29... hxg5 $19 30. hxg5 Be4) 30. Be2 {[%emt 0:00:01]} Qa7 {[%emt 0:00:35]} (30... hxg5 31. hxg5 Be4 32. Rh1+ Kg8 33. Qh3 $18) (30... Kg8 $5 {[%cal Rh6g5]} 31. Nf3 Ne4 $17) 31. Rh1 {[%emt 0:00:42]} Qd7 {[%emt 0:00:27]} ({Better is} 31... Bxg2 $17 32. Rg1 Bc6) 32. Bd1 {[%emt 0:00:02]} Ba4 {[%emt 0:00:10]} (32... Bxg2 $2 33. Rg1 $19) 33. Ra3 {[%emt 0:00:58]} Bxd1 {[%emt 0:00:28]} 34. Rxa8 {[%emt 0:00:24]} Rxa8 {[%emt 0:00:01]} 35. Qxd1 {[%emt 0:01:20]} Kg8 {[%emt 0:00:54]} ({Don't blunder} 35... hxg5 $2 36. hxg5+ Kg8 37. gxf6 $18) 36. Qd3 {[%emt 0:00:24] [#]} e5 $1 {[%emt 0:00:51]} 37. Be3 {[%emt 0:00:40]} hxg5 $2 {[%emt 0:00:36]} (37... Qb7 $19 38. d5 Rb8) 38. hxg5 {[%emt 0:00:01]} e4 {[%emt 0:00:04]} 39. Qe2 $2 {[%emt 0:00:39]} (39. Qc2 $14 {was forced to keep a grip.}) 39... g6 $2 {[%emt 0:00:46]} ({Better is} 39... Ng4 $19 40. Bd2 Qe6) 40. gxf6 {[%emt 0:00:27]} Bxf6 {[%emt 0:30:04]} 41. g3 {[%emt 0:30:56]} Qa7 {[%emt 0:00:00]} 42. Qd2 {[%emt 0:00:00]} Qa4 {[%emt 0:00:00]} 43. Bg5 {[%emt 0:00:00]} Bg7 {[%emt 0:00:00]} 44. Bh6 {[%emt 0:00:00]} Bh8 {[%emt 0:00:00]} (44... Bf6 $11) 45. Bf8 {[%emt 0:00:00]} Kxf8 {[%emt 0:00:00]} 46. Rxh8+ {[%emt 0:00:00]} Ke7 {[%emt 0:00:00]} 47. Qg5+ {[%emt 0:00:00]} Kd7 {[%emt 0:00:00]} 48. Rxa8 {[%emt 0:00:00]} Qxa8 {[%emt 0:00:00]} 49. Qf6 {[%emt 0:00:00]} Qa4 {[%emt 0:00:23]} 50. Qxf7+ {[%emt 0:00:00]} Kd8 {[%emt 0:00:03]} 51. Qg8+ {[%emt 0:02:04]} Kd7 {[%emt 0:00:08]} 52. Qf7+ {[%emt 0:00:10]} Kd8 {[%emt 0:00:17]} 53. Qg8+ {[%emt 0:00:48]} Kd7 {[%emt 0:00:05]} 54. Qh7+ {[%emt 0:00:19]} Kd8 {[%emt 0:01:57]} 55. Qh4+ {[%emt 0:00:04]} Kd7 {[%emt 0:00:21]} 56. Qg4+ {[%emt 0:00:50]} Kc7 {[%emt 0:02:54]} 57. Qe2 {[%emt 0:00:01]} Qb3 {[%emt 0:00:31]} 58. Qd2 {[%emt 0:00:52]} ({But not} 58. Qxe4 $6 Qd1+ 59. Kxa2 Qa4+ 60. Kb1 Qd1+ 61. Ka2 Qa4+ 62. Kb1 Qd1+ 63. Ka2 $11) 58... Qxc4 $2 {[%emt 0:02:07]} (58... Kd7 $14) 59. Qc3 {[%emt 0:00:40]} d5 {[%emt 0:00:04]} 60. Qxc4+ {[%emt 0:00:06]} dxc4 {[%emt 0:00:04]} 61. Kxa2 {[%emt 0:00:14]} Kc6 {[%emt 0:00:08] [#]} 62. Kb1 $2 {[%emt 0:02:56]} ({Only move:} 62. b4 $1 $18 cxb3+ 63. Kxb3) 62... Kd5 {[%emt 0:00:08]} 63. Kc2 {[%emt 0:00:01]} Kxd4 {[%emt 0:00:09]} 64. Kd2 {[%emt 0:00:01]} g5 {[%emt 0:00:54]} 65. g4 {[%emt 0:02:27]} Kd5 {[%emt 0:00:20]} 66. Ke2 $11 {[%emt 0:00:33]} Ke6 {[%emt 0:02:09]} 67. Kd2 {[%emt 0:00:29]} Kd6 {[%emt 0:00:14]} 68. Ke2 {[%emt 0:00:26]} Ke6 {[%emt 0:00:43]} 69. Kd2 {[%emt 0:00:17]} Kd5 {[%emt 0:00:16]} 70. Ke2 {[%emt 0:00:07]} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Oostvogels, Niek"]
[Black "Boeters, Stefan"]
[Result "0-1"]
[ECO "C24"]
[WhiteElo "1905"]
[BlackElo "1798"]
[Annotator "NA RC"]
[PlyCount "114"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 12,102,34,32767,32767,6,32767,0,0,0,32767,32767,-51,-45,-49,-43,32767,32767,-68,-75,-77,-75,-77,-84,-58,-60,-66,-88,-59,-89,32767,-85,-77,-88,-77,-85,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,-99,32767,32767,-132,-194,-212,-227,-136,-112,-142,-149,-146,-150,-162,-137,-170,-145,-149,-149,-141,-152,-138,-141,-137,-204,-160,-187,-153,32767,32767,32767,32767,32767,-215,-204,-221,-214,-210,-209,-216,-209,-209,-221,-233,-239,-297]} 1. e4 {[%emt 0:00:00]} d6 {[%emt 0:07:47]} 2. Bc4 {[%emt 0:00:16]} Nf6 {[%emt 0:00:28]} 3. d3 {[%emt 0:00:28]} e5 {[%emt 0:00:28]} 4. Nf3 {[%emt 0:01:16]} Be7 {[%emt 0:01:00]} 5. O-O {[%emt 0:00:57]} O-O {[%emt 0:00:28]} 6. c3 {[%emt 0:02:43]} Nbd7 {[%emt 0:01:26] LiveBook: 5 Games C24: Bishop's Opening: 2...Nf6} (6... c6 7. Re1 Nbd7 8. Bb3 Nc5 9. Bc2 Bg4 10. Nbd2 Nfd7 11. h3 Bh5 12. Nf1 Ne6 13. Ng3 Bxf3 14. Qxf3 g6 15. Bh6 Re8 16. Rad1 Bg5 17. Bxg5 Qxg5 18. d4 {½-½ (55) Ghaem Maghami,E (2570)-Bu,X (2670) Moscow 2012}) 7. Nbd2 {[%emt 0:05:01]} c6 {[%emt 0:00:38]} 8. d4 {[%emt 0:06:43]} exd4 $146 {[%emt 0:01:34]} ({Predecessor:} 8... Qc7 9. dxe5 dxe5 10. a4 Nc5 11. Qe2 Nh5 12. Nb3 Ne6 13. Be3 Nef4 14. Qc2 Bg4 15. Ne1 Be6 16. Bxe6 Nxe6 {½-½ (16) Ganger,R (1991)-Richardt,M (2022) England 2015}) 9. cxd4 {[%emt 0:05:14]} Nxe4 {[%emt 0:02:47]} 10. Nxe4 {[%emt 0:09:01]} d5 {[%emt 0:00:19]} 11. Bd3 {[%emt 0:00:12]} dxe4 {[%emt 0:00:08]} 12. Bxe4 {[%emt 0:00:06]} Nf6 {[%emt 0:02:29]} 13. Bc2 {[%emt 0:03:31]} Bg4 {[%emt 0:05:51]} 14. Be3 {[%emt 0:07:26]} Qd5 {[%emt 0:04:04]} 15. Bb3 {[%emt 0:16:17]} Bxf3 {[%emt 0:01:19]} 16. Qxf3 {[%emt 0:00:06]} Qxf3 {[%emt 0:00:26]} 17. gxf3 {[%emt 0:00:05]} Rad8 {[%emt 0:03:12]} 18. Rad1 {[%emt 0:02:43]} Nd5 {[%emt 0:02:17]} 19. Rfe1 {[%emt 0:04:34]} Rfe8 {[%emt 0:02:42]} 20. Re2 {[%emt 0:02:19]} Bf6 {[%emt 0:03:21]} 21. Kf1 {[%emt 0:03:52]} Kf8 {[%emt 0:03:10]} 22. Rde1 {[%emt 0:04:29]} h6 {[%emt 0:07:40]} 23. Kg2 {[%emt 0:03:18]} Rd7 {[%emt 0:07:23]} 24. Kf1 {[%emt 0:05:28]} Bd8 {[%emt 0:02:00]} 25. Bd2 {[%emt 0:05:49]} Rxe2 {[%emt 0:05:21]} 26. Rxe2 {[%emt 0:00:08]} Bc7 {[%emt 0:01:24]} 27. h3 {[%emt 0:02:12]} Nf4 {[%emt 0:04:55]} 28. Bxf4 {[%emt 0:01:04]} Bxf4 {[%emt 0:01:16]} 29. d5 {[%emt 0:07:07]} cxd5 {[%emt 0:01:10]} 30. a4 {[%emt 0:00:43]} d4 {[%emt 0:04:26]} 31. Ke1 {[%emt 0:00:54]} (31. Rc2 $17) 31... d3 {[%emt 0:01:53]} 32. Re4 {[%emt 0:00:18]} Bc1 {[%emt 0:01:13]} ({Black should play} 32... g5 $19 33. Bc4 a6) 33. Bc4 {[%emt 0:00:44]} d2+ {[%emt 0:01:22]} 34. Kd1 {[%emt 0:00:01]} Bxb2 {[%emt 0:00:10]} 35. Bb5 {[%emt 0:01:12]} Rd8 {[%emt 0:00:36]} 36. Re3 {[%emt 0:00:35]} Bf6 {[%emt 0:03:57]} 37. Rd3 {[%emt 0:00:53] [#]} Rxd3 $1 {[%emt 0:01:49]} 38. Bxd3 {[%emt 0:00:02]} Bc3 {[%emt 0:00:55]} 39. Kc2 {[%emt 0:00:21]} Ke7 {[%emt 0:00:36]} 40. Be2 {[%emt 0:00:05]} Ba5 {[%emt 0:30:36]} 41. Kb3 {[%emt 0:30:22]} Kd6 {[%emt 0:00:22]} 42. Kc4 {[%emt 0:00:00]} Kc6 {[%emt 0:00:00]} 43. Bd1 {[%emt 0:00:00]} a6 {[%emt 0:00:00]} 44. Bc2 {[%emt 0:00:00]} b5+ {[%emt 0:00:00]} 45. Kd3 {[%emt 0:00:00]} Kc5 {[%emt 0:00:00]} 46. Bd1 {[%emt 0:00:00]} bxa4 {[%emt 0:00:00]} 47. Bxa4 {[%emt 0:00:00]} Kb4 {[%emt 0:00:00]} 48. Bd1 {[%emt 0:00:00]} Ka3 {[%emt 0:00:00]} 49. Kc2 {[%emt 0:00:00]} Bb4 {[%emt 0:00:00]} 50. Be2 {[%emt 0:00:00]} a5 {[%emt 0:00:00]} 51. Bb5 $19 {[%emt 0:00:00]} a4 {[%emt 0:00:00]} 52. Bc4 {[%emt 0:00:00]} d1=Q+ {[%emt 0:00:00]} 53. Kxd1 {[%emt 0:00:00]} Kb2 {[%emt 0:00:00]} 54. Bxf7 {[%emt 0:00:00]} a3 {[%emt 0:00:00]} 55. f4 {[%emt 0:00:00]} a2 {[%emt 0:00:00]} 56. Bxa2 {[%emt 0:00:00]} Kxa2 {[%emt 0:00:00]} 57. f5 {[%emt 0:00:00]} Be7 {[%emt 0:00:00]} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Sandipan, Chanda"]
[Black "Perske, Thore"]
[Result "1/2-1/2"]
[ECO "A65"]
[WhiteElo "2575"]
[BlackElo "2413"]
[Annotator "TA"]
[PlyCount "122"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,122,15,37,9,20,16,28,17,36,15,30,31,26,0,18,12,52,26,46,33,35,0,0,0,0,-1,-7,0,0,-6,0,-7,0,0,3,-31,0,0,25,25,27,26,26,0,21,0,83,80,128,100,116,64,56,10,14,21,19,-8,-8,-8,-8,-7,87,87,89,94,93,64,93,101,48,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. cxd5 Re8 10. f3 a6 11. a4 Qa5 {LiveBook: 11 Games. A65: Modern Benoni: 6 e4} 12. Ra2 $146 ({Predecessor:} 12. Ra3 Nbd7 13. Nh3 Qc7 14. Nf2 b6 15. O-O Kh8 16. Bh6 Bxh6 17. Qxh6 Ng8 18. Qf4 Ne5 19. Qd2 {½-½ (37) Yu,Y (2738)-Maze,S (2613) Caleta 2017}) 12... Qb4 13. a5 b5 14. axb6 $1 Qxb6 15. Bd1 Nbd7 16. Nge2 Ne5 17. Bc2 Rb8 18. O-O Bd7 19. Rfa1 Qc7 20. Qc1 Bb5 21. Nxb5 axb5 22. Ra7 Rb7 23. Ra8 Rxa8 24. Rxa8+ Rb8 25. Qa1 h6 (25... Qc8 $5 {[%cal Rb8a8]} 26. Rxb8 Qxb8 $14) 26. Bc1 Rxa8 27. Qxa8+ Kh7 28. h3 Qb6 (28... c4 $5 {[%cal Rc7c5]} 29. Be3 Nd3 $14) 29. Kf2 b4 30. b3 Qc7 31. f4 $36 {[%mdl 2048] White is pushing.} Ned7 32. g4 (32. Be3 {seems wilder.} Nb6 33. Qa6 Kg8 34. Bd3 Nfd7 35. Qa2) 32... Nb6 (32... c4 $5 {[%cal Rc4b3]} 33. Qc6 Qa7+ 34. Be3 Qa1 35. Qxc4 Qh1 $14) 33. Qc6 Qxc6 (33... Qa7 $11) 34. dxc6 $16 Ne8 35. Be3 Bf8 36. Nc1 (36. Bd3 $16) 36... Nc8 $14 37. Bd3 {Black should prevent Ba6.} Nc7 $1 38. e5 d5 39. f5 Na7 40. e6 {Bf4 is the strong threat.} Nxc6 41. Bf4 Nxe6 (41... Na8 $1 $11) 42. fxe6 $16 fxe6 43. Bb5 Nd4 44. Bd7 Kg7 45. Be5+ Kf7 46. Bxd4 cxd4 {The position is equal.} 47. Nd3 {[#] aiming for Nf4.} Bd6 48. Bc6 Ke7 49. h4 g5 50. hxg5 hxg5 51. Kf1 Kd8 52. Ne1 Be7 53. Ke2 Kc7 54. Be8 e5 55. Bf7 Kc6 56. Kd3 Kc5 57. Bg6 $1 Bd8 58. Nf3 Bf6 59. Nd2 Bd8 60. Bh7 Be7 61. Bf5 e4+ {Precision: White = 60%, Black = 61%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Shyam, Sundar M."]
[Black "Van Delft, Merijn"]
[Result "1-0"]
[ECO "B26"]
[WhiteElo "2534"]
[BlackElo "2384"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,75,0,0,19,0,0,0,32,12,77,47,89,52,117,26,20,32,14,18,21,0,0,0,0,0,34,37,82,74,66,69,27,42,52,45,115,38,37,37,41,24,521,522,2335,2318,2125,2220,2151,2129,1919,1862,29989,5435,29965,29962,29993,29994]} 1. e4 c5 2. Ne2 Nf6 3. Nbc3 d6 4. g3 Nc6 5. Bg2 g6 6. O-O Bg7 7. d3 O-O 8. h3 Rb8 9. Be3 b5 10. Qd2 b4 11. Nd1 Re8 {B26: Closed Sicilian: 3 g3, lines with early Be3} (11... Nd7 12. Bh6 Bxh6 13. Qxh6 Nd4 14. Qd2 e5 15. Ne3 Nf6 16. Kh2 Nh5 17. Nxd4 cxd4 18. Nc4 Be6 19. b3 {½-½ (51) Vachier Lagrave,M (2745)-Dominguez Perez,L (2754) Beijing 2013}) 12. f4 Qc7 13. f5 a5 {The position is equal.} 14. Bh6 Bh8 (14... e6 $11) 15. Ne3 Ne5 16. Nf4 Bb7 ({Black should play} 16... Qa7 $14) 17. Qf2 $146 (17. g4 $16) ({Predecessor:} 17. g4 a4 18. g5 Nfd7 19. h4 {½-½ (48) Iakymov,V (2413)-Yastreb,K (2288) Alushta 2007}) 17... Bg7 $11 18. Bxg7 Kxg7 19. fxg6 hxg6 20. g4 Rh8 21. c3 {[#] Hoping for d4.} g5 22. Nfd5 $1 {[%cal Rd5c7]} Bxd5 23. exd5 Nxd3 24. Qf5 c4 25. Qxg5+ Kf8 {aiming for ...Qc5.} 26. Nf5 {Threatens to win with Qg7+.} Rh7 27. Qe3 Qc5 (27... Nxb2 $6 28. g5 $16) ({Black should try} 27... Ne5 $14) 28. Nd4 (28. Qxc5 $16 dxc5 29. d6) 28... Nxd5 29. Qe4 bxc3 30. bxc3 $40 {[%mdl 128] [#] White is up to no good.} ({Much worse is} 30. Qxh7 Qxd4+ 31. Kh1 (31. Kh2 Qe5+ 32. Kh1 Qg7 $17) 31... Qg7 $17) 30... Nxc3 $2 {[%mdl 8192]} (30... Rxh3 $1 $11 {[%mdl 512] and Black is okay.} 31. Qxd5 (31. Bxh3 $2 {loses.} Nxc3 32. Rxf7+ Kxf7 $17) 31... Qxd5 32. Bxd5 Ne5) 31. Qxh7 $18 {[%csl Gf1][%cal Rh7f7]} Ne2+ 32. Kh1 {[%csl Gf1][%cal Rh7f7]} Ng3+ 33. Kh2 {[%csl Gf1][%cal Rh7f7]} Nxf1+ 34. Rxf1 {[%csl Gf1][%cal Rh7f7]} Qe5+ 35. Kh1 {[%csl Gf1][%cal Rh7f7]} Ke8 36. Nc6 (36. Qg8+ $142 Kd7 37. Qxb8 d5 38. Qb7+ Qc7 39. Qxd5+ Qd6 40. Qb7+ Ke8 41. Qc8+ Qd8 42. Bc6+ Kf8 43. Qxd8+ Kg7 44. Qxe7 Kh6 45. Rf6+ Kh7 46. Rxf7+ Kh8 47. Rf8#) 36... Nf2+ 37. Rxf2 Rb1+ 38. Qxb1 {Precision: White = 47%, Black = 27%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Pijpers, Arthur"]
[Black "Ikonnikov, Vyacheslav"]
[Result "1/2-1/2"]
[ECO "B32"]
[WhiteElo "2457"]
[BlackElo "2538"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,82,27,21,36,22,33,36,40,42,34,26,53,37,41,31,51,46,52,15,60,60,67,62,60,62,58,47,54,52,61,30,73,42,38,31,42,30,31,10,10,33,29,24,10,22,24,23,47,42,47,39,55,55,55,55,55,55,55,55,55,55,55,55,55,55,662]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 {[%cal Bd4b5,Bb5a3,Ba3c4][%mdl 32]} d6 6. N1c3 a6 7. Na3 Be6 8. Nc4 b5 9. Ne3 Nf6 {B32: Sicilian: Löwenthal and Kalashnikov Variations} 10. g3 {LiveBook: 25 Games} g6 (10... b4 11. Ncd5 Nxe4 12. Bg2 f5 13. O-O Be7 14. a3 bxa3 15. Rxa3 O-O 16. f4 g6 17. c3 exf4 18. gxf4 Bh4 19. Ra4 Nc5 20. Rc4 {½-½ (20) Motylev,A (2687)-Shirov,A (2703) Poikovsky 2014}) 11. Bg2 Bg7 {The position is equal.} 12. O-O O-O 13. Ncd5 Rb8 14. c3 Na5 $146 ({Predecessor:} 14... Ne7 15. Nxf6+ Bxf6 16. a4 Qd7 17. axb5 axb5 {½-½ (32) Povarov,V (2132)-Moskvichev,V (2118) ICCF email 2011}) 15. Qd3 Nxd5 16. Nxd5 Nc4 17. Rd1 Qd7 18. a4 Nb6 19. Nxb6 Rxb6 20. axb5 axb5 21. Be3 Bc4 22. Qd2 (22. Qb1 $5 {[%cal Re3b6]} Rc6 23. Qc2 $14) 22... Rc6 23. Ra7 Qe6 24. Rda1 Rfc8 25. Rb7 R6c7 26. Rxc7 Rxc7 27. Ra8+ Bf8 $1 28. Bf1 (28. Qe1 {keeps more tension.} Rc8 29. Qa1 Qe8 30. Ra7 Qc6 31. h4) 28... Bxf1 29. Kxf1 Rc8 30. Rxc8 Qxc8 31. Qd5 Qc4+ 32. Ke1 Kg7 33. Kd2 {White is slightly better.} Be7 34. b3 Qxd5+ 35. exd5 $14 {[%mdl 4096] Endgame KB-KB} Kf8 36. Kd3 $1 Ke8 37. c4 $1 Kd7 38. cxb5 f5 39. f3 Kc7 40. h3 Kb7 41. g4 e4+ $2 {[%mdl 40960] Precision: White = 69%, Black = 58%. . An unexpected result.} (41... Bd8 $14) 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Lai, Hing Ting"]
[Black "Verstraeten, Rein"]
[Result "1-0"]
[ECO "E63"]
[WhiteElo "2393"]
[BlackElo "2316"]
[Annotator "TA"]
[PlyCount "121"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,121,1,34,40,96,25,34,40,33,28,41,25,28,16,18,4,9,0,12,13,20,0,34,0,0,0,6,0,0,0,0,0,0,0,11,-37,0,0,0,0,0,0,0,-8,-15,-40,-13,-13,0,0,252,248,251,252,247,251,313,322,621,585,564,184,145,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,220,212,195,195,407,297,297,290,290,290,357,330,409,381,480,480,441,403,555,543,787,762,5506,5309]} 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 Rb8 8. e3 a6 9. Qe2 {E63: King's Indian: Fianchetto: Panno Variation with 7...a6} e6 {LiveBook: 4 Games} (9... b5 $5) 10. Rd1 (10. b3 b5 11. Bb2 bxc4 12. Qxc4 Nb4 13. a3 Nbd5 14. b4 a5 15. b5 c6 16. a4 cxb5 17. axb5 {½-½ (29) Jakovenko,D (2736)-Wang,H (2739) St Petersburg 2012}) 10... d5 $146 (10... b5 $14) ({Predecessor:} 10... b5 11. e4 bxc4 12. Qxc4 Bb7 13. Qe2 d5 14. Bg5 h6 15. Bxf6 Bxf6 16. e5 Be7 {0-1 (43) Pustovoitova,D (2331)-Bodnaruk,A (2425) Moscow 2011}) 11. e4 (11. Ne5 $16) 11... dxe4 $11 12. Nxe4 Nxe4 13. Qxe4 Ne7 14. b3 b5 15. Qe1 Bb7 16. Ba3 Re8 17. Ne5 Bxg2 18. Kxg2 Qc8 19. Kg1 (19. Bxe7 $5 Qb7+ 20. Kg1 Rxe7 21. Rac1 $14) 19... Qb7 20. Rac1 b4 21. Bb2 Rbd8 22. Rd3 Nf5 23. Rcd1 a5 24. a3 Rd6 25. axb4 axb4 26. Qd2 Red8 (26... Bxe5 $5 27. dxe5 Rxd3 28. Qxd3 c5 $15) 27. d5 exd5 28. cxd5 Ne7 {[%cal Re7d5]} 29. Qf4 f6 30. Nc4 {[%cal Be5c4,Bc4e3,Be3f5][%mdl 32]} Rxd5 31. Rxd5 Rxd5 {[%cal Rd5d1]} 32. Re1 {Black must now prevent Qe4.} Qc6 33. Ne3 Rd2 $2 {[%mdl 8192]} (33... Rb5 $11 {and Black is okay.}) 34. Nf5 $1 $18 {[%cal Rf5e7]} ({And not} 34. Qxb4 Rxb2 35. Qxe7 Bf8 $11) 34... Nxf5 35. Qxd2 Bf8 36. Qd8 Kg7 37. Re8 Bc5 $2 (37... Qd6 38. g4 Nh6 39. Bxf6+ Qxf6) 38. Rg8+ Kh6 39. Qd2+ $2 (39. Bc1+ Be3 40. Bxe3+ Nxe3 41. fxe3 Qc1+ 42. Kg2 Qc2+ 43. Kf3 Qf5+ 44. Ke2 Qh5+ 45. Ke1 Qxh2 46. Qxf6 (46. Qxc7 Qh1+ 47. Kf2 Qh2+ 48. Kf3 Qh1+ 49. Kf4 g5+ 50. Kf5 Qd5+ 51. Kxf6 Qxg8 $11) 46... Qxg3+ 47. Qf2) 39... g5 {[#]} 40. Rd8 ({White should play} 40. Bxf6 $1 $16 {[%mdl 512]} Qxf6 41. h4) 40... Qe4 $11 {Black wants to play ...Ne3!} 41. Rd3 ({But not} 41. Bxf6 $2 {[#]} Ne3 $1 $19 {[%mdl 512]}) 41... Kg6 42. Rd5 Bb6 43. Rd8 Bc5 44. Qd1 h5 $1 45. Rg8+ Kh7 46. Rc8 Kg6 47. Rh8 g4 {Threatens to win with ...Ne3!} 48. Rd8 $40 {[%mdl 128] White attacks.} Bb6 49. Rd2 Qe6 $2 (49... Ne3 $11 {and Black stays safe.} 50. fxe3 Bxe3+ 51. Rf2 Qf5) 50. Re2 $18 Qc6 51. Qd3 h4 $2 (51... Qd6 52. Qxd6 cxd6) 52. Qe4 Qxe4 53. Rxe4 hxg3 54. hxg3 {[%mdl 4096] Endgame KRB-KBN} Kg5 55. Kf1 Bc5 56. Rc4 Bd6 57. Bc1+ Kh5 58. Bf4 Bf8 {Now ...c5 and Black clings on.} 59. Rxc7 {White is clearly winning.} Nd4 60. Rf7 Bc5 61. Rxf6 {Precision: White = 49%, Black = 48%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "7"]
[White "Kuipers, Stefan"]
[Black "Vrolijk, Liam"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2388"]
[BlackElo "2419"]
[Annotator "TA"]
[PlyCount "171"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,171,20,22,22,22,16,20,13,17,12,20,21,20,12,11,23,30,21,25,24,37,35,31,37,37,25,25,20,25,27,28,24,24,0,42,46,70,47,51,47,48,48,48,54,68,66,74,72,152,152,147,133,186,131,139,153,149,149,143,133,131,120,139,14,65,27,162,168,162,159,341,319,426,445,451,457,462,385,415,410,389,357,368,357,329,312,475,436,409,420,585,712,573,623,5273,5501,1356,109,111,111,114,11,165,11,14,8,11520,10088,29952,6099,29965,29968,29968,1486,29969,29970,29970,29970,29968,29971,29971,29972,29973,29973,29976,29974,29975,29975,29976,29977,29977,29978,29977,29979,29979,29976,29976,29977,29977,29977,29978,29979,29979,29980,29980,29981,29981,29981,29982,29981,29981,29982,29982,29983,29983,29984,29982,29983,29981,29982,29988,29989,29989,29990]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 {[%cal Bd2d3,Bd3d4][%mdl 32]} Bc5 5. Bxc6 dxc6 6. O-O {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5} Nd7 7. c3 O-O 8. d4 {The position is equal.} Bd6 9. Bg5 f6 10. Qb3+ Kh8 11. Bh4 Qe8 $146 ({Predecessor:} 11... b6 12. Nbd2 Ba6 13. Rfe1 Qe7 14. dxe5 Nxe5 15. Nxe5 Qxe5 {1-0 (46) Eljanov,P (2751)-Radjabov,T (2710) Shamkir 2017}) 12. Nbd2 Nb6 13. Bg3 Be6 14. c4 {[%cal Rd4e5]} exd4 15. Bxd6 cxd6 16. Nxd4 Bg8 17. Rfe1 Qe5 18. Qd3 Rfe8 19. N2f3 {[%cal Bd2f3,Bf3h4,Bh4f5][%mdl 32]} Qa5 20. b3 Rad8 21. Nf5 Nc8 22. Rad1 Qc7 23. Qc3 Ne7 24. N3h4 (24. Ng3 {seems wilder.} Bf7 25. Re3 a6 26. Nd4 c5 27. Ndf5) 24... Nxf5 25. Nxf5 Be6 26. Ne3 Bc8 27. f3 Re5 28. Rd3 Rde8 (28... Ree8 $142) 29. Red1 $16 f5 30. Rxd6 Qe7 (30... h5 $16 {might work better.} 31. Nxf5 Bxf5) 31. Rd8 (31. Nxf5 $18 Bxf5 32. exf5) 31... Rxd8 32. Rxd8+ Qxd8 33. Qxe5 fxe4 34. fxe4 h6 35. h3 Kh7 36. c5 (36. Kf2 $16) 36... Qd2 $11 37. Nf1 Qd3 (37... Qc1 $11) 38. Ng3 $1 $18 b6 39. Kh2 $36 {[%mdl 2048] Black is under strong pressure.} Qd2 $2 (39... Qa6 $16 40. Qd6 Qb7) 40. Qc7 Bd7 41. Qxa7 bxc5 42. Qxc5 Qxa2 43. Qe7 Qd2 44. e5 c5 {( -> ...Bc6)} 45. Qxc5 Be6 46. Qd6 $1 {[%cal Rd6d2]} Bd5 {[%csl Gd5][%cal Rd2g2] [#]} 47. Ne2 $1 {[%mdl 512]} h5 (47... Qxe2 {was called for.} 48. Qxd5 Qe3) 48. e6 {Strongly threatening Nf4.} Qg5 {[%csl Gd5][%cal Rg5g2]} 49. Qg3 Qxg3+ 50. Kxg3 Bxe6 {[%mdl 4096] Endgame KB-KN} 51. b4 g5 52. Nd4 Bd5 53. b5 $2 (53. Nf5 $1 $18 {and the rest is easy.} h4+ 54. Kf2) 53... Kg6 $16 54. Kf2 Kf6 55. g3 (55. Ne2 $16) 55... Ke5 $2 (55... Ke7 $1 $11 {and Black is okay.}) 56. Ke3 $2 (56. Nf3+ $1 $18 Kf5 57. Ke3) 56... Kd6 $11 57. b6 (57. Nf3 $5 {[%cal Rf3g5]} Bc4 58. Nxg5 Bxb5 59. Ke4 $16) 57... Kc5 $2 {[%mdl 8192] [#]} (57... h4 $11) 58. Ne6+ $1 $18 {[%mdl 512]} Kxb6 (58... Bxe6 59. b7) 59. Nxg5 Kc5 60. Ne4+ Kc6 61. Kf4 (61. h4 $142 Bc4 62. Kf4 Bf1 63. Nf6 Kd6 64. Nxh5 Ke6 65. Kg5 Kf7 66. Nf4) 61... Be6 62. h4 {White mates.} Bf7 63. Kg5 Kd7 64. Nf6+ Ke7 65. Nxh5 Kf8 66. g4 Be6 67. Nf4 Bd7 68. h5 {[%cal Bh4h5,Bh5h6][%mdl 32]} Kg7 69. Ng6 Bc8 70. Ne5 Be6 71. h6+ Kh7 72. Kh5 Bb3 73. Nd7 Bd1 74. Nf6+ Kh8 75. Kg5 Bc2 76. Kf4 Bg6 77. g5 Bc2 78. Ke5 Bb1 79. Ng4 Kh7 80. Kf6 Bc2 81. Ne3 Bg6 82. Nf5 Bh5 83. Ng7 Bg6 84. Ne6 Bd3 85. Nf8+ Kg8 {[#]} 86. g6 $1 {Precision: White = 68%, Black = 42%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Ypma, Peter"]
[Black "Pruijssers, Roeland"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2283"]
[BlackElo "2508"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,60,42,34,22,20,51,42,47,26,25,0,58,54,113,93,112,119,115,97,175,157,279,281,475,475,495,481,474,468,482,439,433,287,490,525,955,942,1964,1908,29991,29992,29993,29994,29994,29989,29999]} 1. d4 f5 2. Nf3 Nf6 3. Bf4 e6 4. h3 b6 5. e3 Bb7 6. Bd3 Be7 7. Nbd2 O-O 8. c3 Ne4 9. Rg1 {LiveBook: 3 Games. A80: Dutch Defence: Unusual White second moves} d5 (9... Bd6 10. Ne5 Qh4 11. Qe2 Nxd2 12. Kxd2 Bxe5 13. dxe5 d6 14. exd6 cxd6 15. Bxd6 Rd8 16. Bg3 Qc4 {1-0 (94) Tikkanen,H (2503)-Sagit,R (2406) Stockholm 2017}) 10. Qe2 $146 ({Predecessor:} 10. g4 c5 11. Qe2 c4 12. Bc2 Nc6 13. Ne5 Nxe5 14. Bxe5 Bf6 15. Bf4 b5 16. Nxe4 fxe4 {0-1 (31) Knoblauch,P-Kabir,S (2115) Germany 1996}) 10... Nd7 11. g4 {White is slightly better.} Bd6 12. Bxd6 cxd6 13. gxf5 exf5 (13... Rxf5 $11 14. O-O-O g6) 14. O-O-O Qf6 ({Better is} 14... Qe7 $14) 15. Rg2 $1 $16 Rae8 16. Rdg1 $1 Re7 17. Ng5 h6 {[#]} (17... Rc8 $16 {was worth a try.}) 18. Ngf3 $1 $18 Qe6 {[#]} (18... Kh7 $16) 19. Nh4 $1 g5 $2 (19... Rff7 {was called for.} 20. Ng6 Nf8 21. Nxe7+ Rxe7) 20. f4 {[%cal Bf2f4,Bf4g5][%mdl 32]} Rg7 21. fxg5 h5 22. Qf3 b5 23. Bxb5 Nb6 24. Qxh5 Nc4 $2 (24... Nxd2 25. Kxd2 Nc4+ 26. Bxc4 dxc4) 25. Qh6 Qc8 26. Nxe4 dxe4 27. g6 f4 28. Rg5 {White mates.} Qxh3 29. Bxc4+ d5 30. Nf5 {[%csl Gf5][%cal Rh6g7]} Qf3 31. Qxg7# {Precision: White = 89%, Black = 23%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Fossum, Oystein Boyum"]
[Black "Nijboer, Friso"]
[Result "0-1"]
[ECO "A25"]
[WhiteElo "2247"]
[BlackElo "2528"]
[Annotator "TA"]
[PlyCount "92"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,92,16,14,2,-27,31,-8,-3,-28,-34,-55,-55,-61,-29,-47,-39,-41,21,0,7,20,15,-35,-24,-32,-8,-76,-66,-65,0,-46,-42,-46,-12,-30,-36,-55,-31,-44,-44,-46,-22,-16,-14,-25,0,0,16,10,33,31,37,0,0,-50,-35,-117,-49,-54,-66,-88,-147,-97,-34,-454,-439,-1047,-1033,-1020,-1032,-923,-879,-29994,-29995,-29995,-29996,-29996,-29997,-29998,-29999]} 1. Nf3 g6 2. c4 Bg7 3. g3 e5 4. Nc3 Nc6 5. Bg2 f5 6. O-O d6 7. Rb1 {A25: English Opening vs King's Indian with ...Nc6 but without early d3} (7. d3 Nf6 8. Rb1 a5 9. a3 O-O 10. b4 axb4 11. axb4 h6 12. b5 Ne7 13. Bb2 Be6 14. Ra1 Qd7 15. Nd2 c6 16. Qc2 Kh7 17. Na4 Rae8 18. bxc6 bxc6 19. c5 Bd5 20. cxd6 Qxd6 21. Nc4 Bxc4 22. Qxc4 {1-0 (42) Ivanchuk,V (2726)-Vitiugov,N (2725) Berlin 2015}) 7... Nf6 8. b4 {LiveBook: 4 Games} a6 9. b5 $146 {The position is equal.} ({Predecessor:} 9. a4 e4 10. Ne1 O-O 11. d3 exd3 12. Nxd3 Ne5 13. c5 Nxd3 14. Qxd3 dxc5 {1-0 (34) Marchio,E (2336)-Schneider,B (2410) Germany 2011}) 9... Na5 (9... axb5 $11 10. cxb5 Nd4) 10. d3 (10. b6 $5) 10... axb5 11. Rxb5 O-O 12. Bd2 Bd7 13. Rb1 Kh8 14. Qc1 Bc6 15. c5 Qe7 ({Black should play} 15... dxc5 $15 16. Nxe5 Bxg2 17. Kxg2 b6) 16. cxd6 $11 cxd6 17. Nb5 Rfc8 18. Qe1 b6 19. Be3 Nb7 20. Nc3 {[#]} (20. Bxb6 $11 {remains equal.} Nc5 21. Nc3) 20... Nd7 $1 $17 21. d4 Bxf3 (21... Na5 $15) 22. Bxf3 (22. exf3 {feels hotter.} Na5 23. f4 e4 24. f3 exf3 25. Bxf3 Nc4 26. Bf2) 22... e4 $1 {[%cal Re4f3]} 23. Bg2 Qe6 24. Rb4 (24. g4 $5) 24... d5 25. Qa1 Nd6 26. Bc1 Nc4 27. e3 Ra5 28. Rd1 Bf8 29. Rb3 Qc6 {Strongly threatening ...b5.} 30. a4 Nf6 (30... Raa8 $5 {[%cal Rc4a5]} 31. Bb2 Qb7 $15) 31. Qb1 h5 32. Bf1 Ra6 33. Re1 (33. Ba3 $5) 33... h4 34. Re2 hxg3 35. hxg3 (35. fxg3 $15 Raa8 36. Rb5) 35... Ng4 (35... Ra7 $17) 36. Rc2 $15 Qd7 37. Rb5 {And now Be2 would win.} Qh7 {[%csl Gg4][%cal Rh7h2]} 38. Bg2 {[#]} Bd6 $1 $40 {[%mdl 128] White needs to defend precisely.} 39. Nxd5 $2 {[%mdl 8192] [#]} ({White has to play} 39. Ne2 $1 $15) 39... Bxg3 $1 $19 {[%mdl 512]} 40. fxg3 (40. Qa2 $142 Bxf2+ 41. Rxf2 Qh2+ 42. Kf1) 40... Qh2+ 41. Kf1 Qxg3 42. Re2 Ra7 {( -> ...Nh2+)} 43. Rbb2 Nh2+ {Black mates.} 44. Kg1 Nf3+ 45. Kf1 Rh7 46. Bxf3 Qxf3+ {Precision: White = 26%, Black = 56%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Visser, Henk-Jan"]
[Black "De Rover, Yong Hoon"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2234"]
[BlackElo "2385"]
[Annotator "TA"]
[PlyCount "126"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,126,59,52,52,41,41,52,57,43,43,46,35,107,120,168,162,147,155,148,147,211,196,281,279,262,266,261,88,124,124,233,222,233,164,172,126,113,32,63,0,242,0,0,0,0,-152,-145,-325,-289,-333,-341,-336,-358,-351,0,0,0,0,0,-128,-113,-122,-116,-116,-60,-60,0,-201,-199,-279,-271,-279,-271,-290,-284,-266,-177,-308,-302,-274,-49,-103,-127,-126,131,-372,-372,-369,-362,-345,0,-3302,-2270,-12837,-12837,-12838,-12825,-12843,-12843,-12844,-12844,-12845,-12845,-12846,-12846]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. h3 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} (8. Qd2 Nbd7 9. O-O-O Be7 10. f4 b5 11. Kb1 Qc7 12. h3 Nb6 13. Bxb6 Qxb6 14. Bd3 exf4 15. Qxf4 O-O 16. Nd5 Bxd5 17. exd5 {½-½ (39) Wei,Y (2728)-Areshchenko,A (2649) Khanty-Mansiysk 2017}) 8... h5 9. Qd2 Nbd7 10. f4 Rc8 11. O-O-O Be7 12. Kb1 b5 {LiveBook: 12 Games} 13. Bd3 Qc7 14. f5 Bc4 15. a3 h4 $146 16. Rhe1 Rb8 17. Qe2 Nb6 (17... Bxd3 $14 18. Qxd3 (18. Rxd3 b4 $11) 18... Kf8) 18. Bxb6 $1 $16 Rxb6 19. Bxc4 $1 bxc4 20. Na5 O-O 21. Nxc4 Rb7 (21... Rc6 $16 22. b3 Rb8) 22. Ka2 a5 (22... Rc8 $142) 23. a4 $18 Rb4 24. b3 Rc8 25. Nb5 $2 (25. Nd5 $1 $18 {[%cal Rd5c7] and the rest is easy.} Nxd5 26. Rxd5) 25... Qb8 {Threatening ...Rcxc4.} 26. c3 Rxb5 (26... Rbxc4 $16 {keeps fighting.} 27. bxc4 Nd7) 27. axb5 Rc5 28. Na3 d5 29. exd5 Nxd5 30. Rxd5 (30. Nb1 $16 {And now c4 would win.} Rxb5 31. f6 Bxf6 32. Qc4) 30... Rxd5 $14 31. c4 ({Better is} 31. Rd1 $1 $14 Rxd1 32. Qxd1) 31... Rd6 $2 (31... Qd6 $1 $11 {and Black has nothing to worry.} 32. Nb1 (32. cxd5 Qxa3+ 33. Kb1 Qxb3+ 34. Qb2 Qd3+ 35. Qc2 Qxb5+ 36. Ka1 Qxd5 $11) 32... Rd3) 32. Rd1 $2 (32. Nc2 $18) 32... Rxd1 $11 33. Qxd1 e4 $1 {[%cal Re4e3]} 34. Qd4 $2 (34. Nc2 $1 $11) 34... Qf4 $17 {[%mdl 1024] Black has strong compensation.} 35. Nc2 $2 (35. b6 $17 {was called for.} Bf6 36. Qd1 Qf2+ 37. Nc2) 35... Bf6 $1 $19 {[%cal Rf6d4]} 36. Qe3 Qe5 $1 {[%csl Gf6][%cal Re5b2]} 37. Qc1 Qc3 $1 {Strongly threatening ...e3!} 38. b6 {[#]} a4 $2 (38... e3 $1 $19 {[%cal Re3e2][%mdl 512] Hoping for ...e2.} 39. Ka3 (39. Qxe3 Qb2#) 39... e2) 39. Qb1 $36 {[%mdl 2048] White fights for an advantage.} a3 40. b7 (40. Nxa3 $2 e3 $19) 40... Be5 41. b4 (41. c5 $1 $11) 41... Qxc4+ $17 42. Kxa3 Qa6+ 43. Kb3 Qxb7 (43... Qd3+ $1 $17 44. Ka2 Qd5+ 45. Qb3 Qxb7) 44. Qf1 $1 $15 Qc8 (44... Bf6 $15 45. Qc4 Qe7) 45. Qd1 $2 (45. Qe2 $11) 45... Bf6 $1 $19 46. Qd2 (46. Qe2 {is a better defense.} Qxf5 47. Ne3) 46... Qxf5 47. Ne3 Qg5 48. Nc4 Qg3+ 49. Ka4 Qc7 50. Qd5 (50. Kb3 {only move.}) 50... Qe7 51. Qc5 {intending Qxe7.} Qxc5 $2 (51... Qd7+ $19 52. Ka3 Bd4) 52. bxc5 {[%mdl 4096] Endgame KB-KN} Kf8 53. Kb5 {[#]} Ke7 $2 {[%mdl 8192] [#]} (53... g6 $1 $17 {and life is bright.} 54. Ka6 Bd8) 54. Ka6 $2 {[%mdl 8192]} (54. c6 $1 $16 {is necessary to keep the advantage.}) 54... Bg5 55. c6 Bf4 56. Kb7 Ke6 {...Kd5 is the strong threat.} ({Not} 56... Kd8 57. Nb6 $15) 57. c7 $2 {[%mdl 8192] [#]} (57. Ne3 $11) 57... Bxc7 $1 {[%mdl 512] Black is clearly winning.} 58. Kxc7 {KN-KP} Kd5 59. Ne3+ Kd4 60. Nf1 e3 {[%cal Be4e3,Be3e2][%mdl 32]} 61. Kd6 e2 62. Nd2 Ke3 63. Nf3 Kf2 {Precision: White = 44%, Black = 54%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Holwijn, Melvin"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "1932"]
[BlackElo "1866"]
[Annotator "NA"]
[PlyCount "46"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. Nc3 Bg4 5. e3 c5 6. Be2 cxd4 7. exd4 {A41: 1 d4 d6: Tartakower System and Modern Defence} Nh6 (7... Nc6 8. d5 Bxf3 9. Bxf3 Ne5 10. Be2 Rc8 11. Qb3 Qc7 12. O-O a6 13. Be3 h5 14. Bb6 Qb8 15. h3 Nh6 {1-0 (37) Korobov,A (2692)-Onischuk,V (2601) Doha 2016}) 8. h3 Bxf3 9. Bxf3 Nc6 10. g4 O-O 11. h4 $146 ({Predecessor:} 11. Be3 e5 12. dxe5 Nxe5 13. Bd5 Kh8 14. Qd2 Ng8 15. f4 Nc6 {1-0 (32) Svane,R (2367)-Danielsen,H (2511) Helsingor 2012}) 11... e5 12. Bxc6 bxc6 13. dxe5 Re8 14. Qe2 Bxe5 15. Be3 Qa5 16. O-O Qd8 17. g5 Nf5 18. Qg4 d5 19. Bf4 Qc7 20. Bxe5 Rxe5 21. cxd5 cxd5 22. Rae1 $1 Qd6 23. Qf4 $19 (23. Rxe5 $15 Qxe5 24. Qf3) 23... Rxe1 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Boeters, Stefan"]
[Black "Geboers, Jimmy"]
[Result "0-1"]
[ECO "A36"]
[WhiteElo "1798"]
[BlackElo "1852"]
[Annotator "NA"]
[PlyCount "104"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 34,91,116,32767,32767,32767,32767,58,73,115,100,91,207,210,285,-275,-221,-250,-267,-261,-258,-258,-263,-266,-181,-231,-113,32767,-10,32767,32767,32767,32767,32767,32767,32767,-357,-323,-347,-29991,-342,-2093,-254,-293,-301,-403,-339,-326,-370,-29989,-29990,-29990,-29991,-29991,-327,-341,-296,-453,-375,-364]} 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. e3 d6 6. Nge2 e5 7. O-O {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7} f5 (7... Nge7 8. d3 O-O 9. b3 Be6 10. Nd5 e4 11. Rb1 exd3 12. Qxd3 Nxd5 13. cxd5 Ne5 14. Qc2 Bd7 15. h3 Bb5 16. Rd1 Bxe2 17. Qxe2 {0-1 (48) Markowski,T (2576)-Heberla,B (2573) Gorzow Wielkopolski 2014}) 8. f4 Nge7 9. a3 $146 ({Predecessor:} 9. Nd5 O-O 10. Nec3 a6 11. a3 Be6 12. Rb1 Rb8 13. b4 b5 14. cxb5 axb5 15. Nxe7+ Nxe7 16. bxc5 dxc5 {0-1 (30) Dzyuba,A-Sadovnikov,I Russia 2004}) 9... Be6 10. d3 O-O 11. Rb1 a5 12. b3 d5 13. fxe5 Bxe5 14. d4 cxd4 15. exd4 Bg7 16. c5 b6 17. b4 axb4 18. axb4 bxc5 19. bxc5 f4 20. Rxf4 Rxf4 21. Bxf4 Nf5 22. Nb5 Qf6 (22... Qd7 $16 {was necessary.} 23. Ra1 Rxa1 24. Qxa1 h6) 23. Nc7 Rd8 {[#]} 24. Bg5 $4 (24. Rb6 $1 $18 {[%cal Rb6c6] was the only winning move.} Ncxd4 25. Kh1 Nxe2 26. Nxe6 (26. Rxe6 Nc3 $18) 26... Nxf4 27. Nxd8 (27. Nxf4 Qc3 $16) 27... Qxd8 28. gxf4) 24... Qxg5 25. Nxe6 Qe3+ 26. Kh1 Qxe6 27. Nf4 Qf7 28. Qb3 Nce7 ({Weaker is} 28... Bxd4 29. Bxd5 Rxd5 30. Qxd5 $15) 29. Qb6 Rc8 (29... Re8 $19 30. Ne6 Kh8 31. Nxg7 Qxg7) 30. Qb7 Qe8 ({Of course not} 30... Bxd4 $6 31. Bxd5 Nxd5 32. Qxc8+ Kg7 33. Ne6+ Kh6 34. Nxd4 $11) ({But not} 30... Nxd4 $6 {[#]} 31. Qxc8+ $1 {[%mdl 512]} Nxc8 32. Bxd5 $11) (30... Re8 $17 31. c6 Bxd4) 31. Nxd5 Nxd5 32. Bxd5+ Kh8 33. c6 Bxd4 34. c7 Kg7 35. Bc6 Qe6 36. Bd5 $2 {[#]} (36. Bg2 $19) 36... Qd7 $2 (36... Nxg3+ $1 {[%mdl 512] mates} 37. Kg2 (37. hxg3 Qh3#) 37... Qe2+ 38. Kh3 {[#]} Nf1 $1 {[%mdl 512]} 39. Qb2 Qh5+ 40. Kg2 Qxd5+ 41. Kxf1 Qf3+ 42. Ke1 Re8+ 43. Kd2 Re2+ 44. Kd1 Qf1#) 37. Rc1 $2 {[#]} (37. Bc6 Qd6 38. Be4 Rxc7 39. Qxc7+ Qxc7 40. Rb7 Qxb7 41. Bxb7) 37... Nd6 $2 (37... Nxg3+ $1 {[%mdl 512]} 38. Kg2 (38. hxg3 Qh3#) 38... Ne2) 38. Qb4 Bf6 39. Rc6 Ne8 40. Bf3 Rxc7 41. Rb6 $2 (41. Rxc7 $19 Nxc7 42. Kg2) 41... Rc1+ 42. Kg2 Rc2+ 43. Kh1 Qd2 $2 (43... Qh3 {mates} 44. Rb7+ Kh6 45. Qf4+ g5 46. Rxh7+ Kxh7 47. Qe4+ Kg7 48. Qg6+ Kxg6 49. Be4+ Kh6 50. Kg1 Rxh2 51. Bf3 Bd4#) 44. Qxd2 Rxd2 45. h4 Bd4 46. Rb7+ $19 Kf8 47. h5 Nf6 48. hxg6 hxg6 49. g4 Rb2 50. Rc7 Rf2 51. Rc4 Rxf3 52. Rxd4 Rg3 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Ikonnikov, Vyacheslav"]
[Black "Sandipan, Chanda"]
[Result "1/2-1/2"]
[ECO "A81"]
[WhiteElo "2538"]
[BlackElo "2575"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,98,35,21,29,10,10,10,31,29,40,14,19,21,14,17,14,-9,25,24,25,8,12,13,20,0,0,-19,1,0,20,23,16,0,0,0,0,0,0,0,88,75,107,86,83,84,87,61,52,63,63,0,0,0,2,8,7,7,8,1,5,-35,-17,-37,-19,-43,-31,-45,0,0,0,0,0,0,0,0,0,0,5,6,8,0,0,0,0,0,0,0,0]} 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. b3 Bg7 5. Bb2 O-O 6. Nf3 d5 7. O-O e6 {A81: Dutch Defence: 2 g3} 8. Nbd2 {[%cal Bb1d2,Bd2f3,Bf3e5][%mdl 32]} (8. c4 b6 9. Qc2 Bb7 10. cxd5 exd5 11. Rc1 c6 12. Ne5 Ng4 13. Nd2 Nxe5 14. dxe5 {1-0 (51) Anand,V (2770)-Anton Guijarro,D (2627) Leon 2016}) 8... Nbd7 9. c4 c6 10. Qc2 Re8 $146 ({Predecessor:} 10... Ne4 11. b4 Ndf6 12. a4 Bd7 13. Nb3 Rc8 14. Ne5 Ne8 15. c5 Ng5 {1-0 (24) Ftacnik,L (2599)-Ferguson,R (2246) Greenville 2006}) 11. Rfd1 b6 12. Ne5 Bb7 13. Ndf3 Rc8 14. c5 Ng4 15. Nxd7 Qxd7 16. h3 Nf6 17. Ne5 Qe7 18. b4 Ne4 19. e3 Ba6 20. Kh2 $36 {[%mdl 2048] White fights for an advantage.} Bxe5 21. dxe5 bxc5 22. bxc5 (22. f3 $5 {[%cal Rf3e4]}) 22... Rb8 {[%cal Bc8b8,Bb8b4,Bb4c4][%mdl 32]} ({Not} 22... Nxc5 $2 23. Ba3 $18) 23. Bd4 Rb4 24. Rab1 Rc4 25. Qb2 Nxc5 {[#]} (25... Ra4 $11) 26. Bf1 $1 $16 Na4 27. Qb3 Bb5 28. Bxc4 dxc4 29. Qb4 (29. Qc2 {is interesting.} Rd8 30. e4 fxe4 31. Qxe4 a6 32. Rdc1) 29... Qxb4 30. Rxb4 a6 {Hoping for ...c5.} 31. Rbb1 ({White should play} 31. Ba1 $1 $14) 31... Rd8 $11 32. Rbc1 c5 33. Ba1 Rd3 $1 34. g4 Kf7 35. Kg3 Nb6 36. Kf3 Ba4 37. Rg1 Ra3 38. gxf5 exf5 39. h4 Rxa2 40. h5 {The position is equal.} gxh5 41. Kg3 {[#]} h4+ $1 42. Kxh4 Rxf2 43. Kg3 Re2 44. Rh1 Rxe3+ 45. Kf2 f4 46. Rh4 Nd5 {[#]} 47. Rxf4+ $1 {[%mdl 512]} Nxf4 48. Kxe3 Nd5+ 49. Kd2 Bb5 {Precision: White = 64%, Black = 70%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Nijboer, Friso"]
[Black "Shyam, Sundar"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2528"]
[BlackElo "2534"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,87,12,6,36,33,33,41,45,31,27,28,35,31,37,29,35,32,42,16,29,0,34,-60,-53,-43,-20,-27,-18,-60,-46,-51,-43,-43,-10,-70,-56,-68,-62,-53,-26,-43,-30,-64,-70,-60,-50,-48,-46,-50,-28,-79,-47,-41,-27,-63,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Ne7 6. Nbd2 {B12: Caro-Kann: Advance Variation} h6 7. Nb3 Nd7 8. O-O g5 9. Bd2 Bg7 10. a4 {LiveBook: 6 Games} O-O 11. a5 $146 ({Predecessor:} 11. h4 g4 12. Ne1 f6 13. exf6 Nxf6 14. Nd3 Ng6 15. h5 Nxh5 16. Bxg4 {0-1 (26) Ragger,M (2703)-Akesson,R (2420) Graz 2017}) 11... f6 12. exf6 Bxf6 13. Bb4 Rf7 14. Nc5 Nxc5 15. Bxc5 Ng6 16. Bd3 Be7 17. Bxe7 Qxe7 18. Ra3 Raf8 19. Re1 Qf6 {Black wants to play ...Bxd3.} 20. Ne5 (20. h3 $14) 20... Nxe5 $15 21. dxe5 Qg7 {Threatens to win with ...Bxd3.} (21... Qe7 {seems wilder.} 22. h3 Bxd3 23. Qxd3 Kg7 24. Re2 Qc5) 22. f3 Bxd3 23. Rxd3 Rf5 24. Rde3 Qc7 25. Qd2 b6 26. b4 (26. axb6 $11 axb6 27. c4) 26... Rf4 27. axb6 Qxb6 28. c3 R8f5 29. Qf2 Rc4 30. Rd3 c5 31. bxc5 Qxc5 32. Qxc5 Rxc5 {[%mdl 4096] Endgame KRR-KRR} 33. Rb1 Rc7 34. Rb8+ (34. Re3 $11) 34... Rf8 35. Rb5 Kf7 36. Ra5 Ke7 (36... Rb8 $15) 37. Rd2 {The position is equal.} Rb8 38. Rda2 Rbb7 ({Much weaker is} 38... Rxc3 $6 39. Rxa7+ Kd8 40. Rh7 $16) 39. Kf2 Kf7 40. g4 Rxc3 41. Rxa7 Rc2+ 42. Kg3 Rxa7 43. Rxa7+ Kf8 44. Ra8+ {Precision: White = 52%, Black = 41%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Pruijssers, Roeland"]
[Black "Warmerdam, Max"]
[Result "1/2-1/2"]
[ECO "B67"]
[WhiteElo "2508"]
[BlackElo "2357"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,77,44,39,31,31,25,29,21,29,35,29,31,29,15,98,66,120,103,144,145,117,126,122,108,177,130,167,150,206,40,213,205,213,213,201,208,193,199,202,8,8,16,8,21,11,0,0,-68,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f3 b5 10. Kb1 Be7 11. Nxc6 Bxc6 12. h4 {B67: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 Bd7, lines without 9 f4 Be7} (12. Bxf6 Bxf6 13. Qxd6 Qxd6 14. Rxd6 Rc8 15. Rd2 Ke7 16. Bd3 Bxc3 17. bxc3 Rc7 18. Kb2 Rhc8 19. Be2 Be8 {½-½ (28) Mastrovasilis,D (2590)-Stocek,J (2556) Germany 2017}) 12... Rc8 13. Ne2 Bb7 14. Nd4 {White has an edge.} h6 15. Be3 Nd7 16. g4 Ne5 (16... Bxh4 17. g5 $1 $16 {[%mdl 512]}) 17. Qg2 Nc4 (17... Bxh4 $11 {keeps the balance.} 18. g5 hxg5) 18. Bc1 $146 ({NOTEXT:} 18. Bxc4 Rxc4 19. g5 hxg5 20. hxg5 Rxh1 21. Rxh1 {1-0 (47) Makropoulou,M (2287)-Czarnota,D (2238) Ermioni Argolidas 2005}) 18... Qb6 ({Better is} 18... g6 $14) 19. g5 $1 $16 hxg5 20. hxg5 Rxh1 21. Qxh1 g6 22. Qh8+ Bf8 (22... Kd7 $16 23. Qg7 Rf8) 23. b3 e5 24. Bh3 {And now Ne6 would win.} Rc7 (24... exd4 $16 {might work better.} 25. Bxc8 (25. bxc4 $2 bxc4+ 26. Ka1 Rb8 $19) 25... Bxc8) 25. Ne2 $2 ({Not} 25. bxc4 exd4 26. Bb2 (26. Rxd4 bxc4+ 27. Ka1 Bc8 $14) (26. Qxd4 Qxd4 27. Rxd4 Rxc4 $11) 26... bxc4 $14) (25. Ne6 $18 fxe6 26. Qf6 (26. bxc4 bxc4+ 27. Ka1 Bc8 $11)) 25... Na5 $2 (25... Ne3 $14 26. Bxe3 Qxe3 27. Rxd6 Qxg5) 26. Rd3 $1 $18 b4 {[#]} 27. Be3 $1 {[%cal Re3b6]} Qc6 {[#]} 28. c4 $1 Bc8 29. Bxc8 Rxc8 30. Rd5 $2 (30. Nc1 $18) 30... Nxc4 $1 $11 31. bxc4 Qxc4 32. Rd2 {Threatening Kb2.} b3 {[%cal Bb4b3,Bb3a2][%mdl 32]} 33. Qh1 d5 34. exd5 (34. Qh8 $11 bxa2+ 35. Ka1) 34... Bb4 ({Black should play} 34... bxa2+ $15 35. Ka1 Bg7) 35. Qh8+ {The position is equal.} Kd7 36. Qf6 bxa2+ 37. Ka1 Bc3+ $1 38. Nxc3 Qxc3+ 39. Rb2 {Precision: White = 60%, Black = 52%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Gavrilov, Alexei"]
[Black "Slingerland, Fred"]
[Result "1/2-1/2"]
[ECO "B72"]
[WhiteElo "2491"]
[BlackElo "2335"]
[Annotator "TA"]
[PlyCount "168"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,168,47,49,36,47,79,36,50,47,124,73,60,56,54,75,80,18,45,39,41,0,0,-10,0,0,66,52,116,113,122,114,116,77,98,87,77,98,102,0,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 g6 7. Be3 Bg7 8. Qd2 O-O 9. O-O-O Nxd4 10. Bxd4 Be6 11. h4 Qa5 12. Qg5 {B72: Sicilian Dragon: 6 Be3, lines with h3+Bc4 and sidelines} Qxg5+ 13. hxg5 Nd7 14. Nd5 Bxd5 15. exd5 {LiveBook: 5 Games} Bxd4 16. Rxd4 Kg7 {[#]} 17. f4 $146 (17. Re1 {seems wilder.} Rfe8 18. Bb5 Rad8 19. Ba4 a6 20. c4) ({Predecessor:} 17. Re4 Rfe8 18. Bb5 Rad8 19. Reh4 Rh8 {½-½ (50) Nabaty,T (2523)-Can,E (2477) Chotowa 2010}) 17... a6 18. Re1 h5 (18... Rfe8 $14) 19. Bf3 (19. gxh6+ $142 Kxh6 20. Bf3) 19... Rfe8 $16 20. Rc4 Nc5 21. b4 b5 22. Rc3 (22. Rxc5 $16 dxc5 23. bxc5) 22... Na4 23. Rc6 Kf8 24. c4 bxc4 25. Rxc4 Rec8 26. Rc6 Nb6 (26... Rcb8 $1 $11) 27. Kb2 Rxc6 (27... Rcb8 $14) 28. dxc6 $14 {[%mdl 4096] Endgame KRB-KRN} d5 29. Kb3 e6 30. a4 a5 31. bxa5 Rxa5 {[#]} 32. Kb4 $1 {[%cal Rb4a5]} Ra8 33. c7 ({White should play} 33. a5 $16 Nc8 34. Kb5) 33... Rc8 {The position is equal.} 34. Kb5 (34. Kc5 $5 {[%cal Rc5b6]} Na8 35. a5 $11) 34... Na8 35. Ka6 Rxc7 36. Rb1 Rc4 37. a5 $1 {[#] aiming for Rb8+.} Nc7+ 38. Kb6 Ke7 39. Be2 $1 {[%cal Re2c4]} Rc2 {Threatens to win with ...Na8+.} 40. Bd1 Rc3 41. a6 Nxa6 $1 42. Kxa6 $11 {KRB-KR} Rc4 43. g3 (43. f5 $5) 43... h4 44. gxh4 {And now h5 would win.} Rxf4 45. h5 gxh5 46. Bxh5 Ra4+ 47. Kb5 Rh4 48. Be2 Rh2 49. Bg4 Rg2 50. Rb4 (50. Bf3 $5 {[%cal Rf3g2]} Rg3 51. Bd1 $11) 50... Kd6 51. Bh5 Rxg5 52. Bxf7 e5 53. Ra4 e4 54. Ra6+ Ke7 55. Bg6 Re5 56. Kc5 Re6 57. Ra7+ Kf6 58. Bh5 (58. Kxd5 $5 {[%cal Ra7f7]} Re5+ 59. Kd6 $11) 58... Re7 59. Ra8 Ke5 60. Rc8 d4 61. Kc4 d3 62. Kc3 Rg7 63. Kd2 Rg2+ (63... e3+ $5 64. Kxe3 (64. Kxd3 Kf4 $14) 64... Kf6 $14) 64. Ke3 Rg3+ 65. Kd2 Rg2+ 66. Ke3 Rg3+ 67. Kf2 Rg5 68. Ke3 Rg3+ 69. Kf2 Rg5 70. Rc4 Kf4 ({Not} 70... Rxh5 $2 71. Rc5+ Kf4 72. Rxh5 $18) (70... e3+ $5 71. Kxe3 Kf6 $14) 71. Bf3 Re5 72. Bg2 Re7 73. Ra4 Re5 74. Rd4 Re7 (74... d2 $5) 75. Rb4 (75. Bf3 $5) 75... Re5 76. Ra4 Re7 77. Rc4 Re5 78. Rd4 Re7 79. Rd8 e3+ 80. Ke1 Ra7 {[%cal Ra7a1]} 81. Rxd3 Ra1+ 82. Ke2 Ra2+ 83. Kf1 Ra1+ 84. Ke2 Ra2+ {Precision: White = 61%, Black = 68%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Vrolijk, Liam"]
[Black "Lai, Hing Ting"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2419"]
[BlackElo "2393"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,81,-44,-47,-66,-37,-38,-86,-85,-88,-81,-83,-93,-107,-108,-109,-99,-127,-98,-131,-160,-189,-170,-202,-205,-184,-84,-156,-166,-160,-95,-131,-121,-104,-112,-131,-120,-119,-123,-128,-116,-135,-72,-61,0,0,0,0,0,0,16,18,8,8,8,8,8,8,114,82,438,444,435,433]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Bb4+ 5. Nd2 O-O 6. Ngf3 dxc4 7. O-O b5 {E04: Open Catalan: 5 Nf3} 8. a4 c6 9. axb5 cxb5 10. Ng5 Nd5 11. e4 {LiveBook: 7 Games} Nc7 $1 (11... Qxg5 12. exd5 exd5 13. Nxc4 $1 $14 {[%mdl 512]}) (11... Ne7 12. e5 Nd5 13. Nxh7 Kxh7 14. Qh5+ Kg8 15. Ne4 f6 16. Nxf6+ gxf6 17. Qg6+ Kh8 18. Qh5+ Kg8 {½-½ (18) Ivanchuk,V (2732)-Hou,Y (2649) Shenzhen 2017}) 12. Ndf3 $146 {Strongly threatening Nxh7!} ({Predecessor:} 12. Nxh7 Kxh7 13. Qh5+ Kg8 14. e5 Bxd2 15. Bxd2 {0-1 (30) Wang,K (2367)-Friedel,J (2528) Madison 2017}) 12... h6 13. Nh3 Bb7 14. Qe2 Nc6 {[%cal Bb8c6,Bc6a5,Ba5b3][%mdl 32]} 15. Rd1 Na5 16. Bf4 Nb3 17. Rab1 Bd6 18. Ne5 Qe7 $36 {[%mdl 2048] Black is in control.} 19. Qh5 Ne8 $1 20. Bxh6 {[#]} Bxe5 $1 21. dxe5 gxh6 22. Qxh6 {[#]} f6 (22... Nc5 $1 $19 {and Black stays clearly on top. ...a6 is the strong threat.} 23. Ra1 (23. Ng5 $2 f6 $19) 23... a6) 23. Nf4 (23. exf6 $142 Qxf6 24. Qh5) 23... fxe5 ({Resist} 23... Qg7 24. Qh3 $11) 24. Nxe6 Qf6 (24... Rf6 $142 25. Qg5+ Ng7 26. Nxg7 Qxg7 27. Qxe5 a6) 25. Qxf8+ $17 Qxf8 26. Nxf8 Kxf8 27. Rd7 Nc5 28. Rh7 Bxe4 29. Bxe4 Nxe4 30. Rh5 Kf7 (30... a5 $142 31. Rd1 a4 32. Rxe5 N4d6) 31. Re1 Nd2 (31... N4d6 $15) 32. Rf5+ $11 Nf6 33. Rexe5 b4 $1 34. g4 {aiming for g5.} Kg6 35. Re6 Rf8 $1 36. h4 {[%cal Bh2h4,Bh4h5][%mdl 32] White wants to play h5+.} c3 37. bxc3 b3 {White must now prevent ...b2.} 38. Rb5 {Threatens to win with g5.} Re8 (38... Kg7 $11 {remains equal.}) 39. Rd6 b2 $2 {[%mdl 8192]} (39... Nc4 $16 40. h5+ Kf7) 40. h5+ $18 ({Not} 40. Rxd2 Re1+ 41. Kg2 b1=Q $14) 40... Kf7 41. Rxb2 {Precision: White = 69%, Black = 45%.} ({Weaker is} 41. Rxd2 Re1+ 42. Kg2 b1=Q $14) 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "De Rover, Yong Hoon"]
[Black "Pijpers, Arthur"]
[Result "1/2-1/2"]
[ECO "B30"]
[WhiteElo "2385"]
[BlackElo "2457"]
[Annotator "TA"]
[PlyCount "150"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,150,20,27,6,6,0,19,17,20,16,35,24,35,15,18,5,15,5,14,8,10,9,0,24,37,-14,53,20,20,0,0,9,17,15,35,-15,6,5,15,4,8,7,60,71,112,65,101,19,16,0,0,0,27,8,8,8,8,8,8,8,13,8,8,8,86,86,110,77,71,68,121,121,103,67,128,66,61,59,70,70,70,70,70,70,70,70,72,70,72,70,69,69,150,155,154,147,152,110,110,110,110,110,110,110,110,32,32,0,0,0,0,0,0,0,32,0,0,0,0,0,0,0,32,0,6,0,32,32,32,32,32,7,1055]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. Bxc6 bxc6 5. b3 f6 6. O-O Nh6 7. d4 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6} Nf7 8. Ba3 cxd4 (8... Qb6 9. Nc3 cxd4 10. Na4 Qa5 11. Bxf8 Kxf8 12. Nxd4 g6 13. f4 Kg7 14. Kh1 c5 {½-½ (30) Naiditsch,A (2711)-Krasenkow,M (2614) Jurmala 2015}) 9. Bxf8 Kxf8 10. Qxd4 e5 {LiveBook: 5 Games} 11. Qc5+ Qe7 12. Qa5 $146 ({Predecessor:} 12. Qxe7+ Kxe7 13. c4 a5 14. Nc3 d6 {½-½ (34) Pavlikov,A-Dobrica,D RCCA 2004}) 12... g6 13. c4 d6 14. Nc3 Be6 15. Rad1 Kg7 16. Rfe1 Qb7 17. Rd3 Qb6 18. Qa3 a5 19. Qc1 Rhd8 20. Red1 Qa7 21. h3 h6 22. Qe3 (22. Na4 $14) 22... f5 (22... a4 $11) 23. Qxa7 Rxa7 24. Nd2 Rad7 25. f3 Ng5 26. Na4 Bf7 27. c5 {Black must now prevent Nb6.} dxc5 (27... d5 $5 {[%cal Rd5e4]} 28. Nb6 Rc7 $11) 28. Rxd7 Rxd7 29. Nxc5 Rd4 30. Kf2 a4 (30... Ne6 $11 31. Nxe6+ Bxe6) 31. h4 Ne6 32. Nxa4 fxe4 {[#]} 33. fxe4 (33. Nc3 $1 $16) 33... g5 $11 {...Bh5 is the strong threat.} 34. Nc3 {And now Nf3 would win.} Nc5 $1 35. hxg5 hxg5 36. Ke2 Bh5+ 37. Nf3 {Black should prevent Ke3.} Nxe4 38. Nxe4 Rxe4+ {[%mdl 4096] Endgame KRB-KRN} 39. Kf2 g4 40. Rd7+ Kf6 41. Nd2 Rf4+ (41... g3+ $11 {remains equal.} 42. Kxg3 Re2) 42. Ke3 $16 Be8 43. Rd6+ (43. Rc7 {with more complications.} Rd4 44. a4 Rd5 45. Nc4 Rd1 46. a5) 43... Ke7 44. Rh6 Rd4 (44... g3 $14) 45. Nc4 Rd5 46. Ke4 g3 (46... Rd1 $14) 47. Nxe5 (47. a4 $16) 47... Rd2 $14 48. Kf3 $1 c5 49. Ra6 Bb5 50. Ra5 Bf1 51. Ng6+ $1 Kd6 52. Nf4 c4 53. bxc4 Bxc4 54. a3 Kc6 55. Kxg3 Ra2 {[#]} (55... Bb5 $14) 56. Kh4 $1 $16 Kb6 57. Ra8 Bb5 58. Rb8+ Kc5 59. Ne6+ Kd6 60. Rxb5 Kxe6 {KR-KR} 61. g4 Rxa3 62. Rf5 (62. Kg5 $16) 62... Ra8 $14 63. Kg3 Rb8 64. Kf4 Ra8 65. Kg3 Rg8 66. Rf4 Ke5 67. Rf2 Ke6 68. Kh4 {Hoping for g5.} Rh8+ $1 69. Kg3 Rg8 70. Rf5 Ra8 71. Kf4 Rb8 72. Kg3 Rg8 73. Rf1 Ke5 74. Rf3 Ke6 75. Kh4 {Strongly threatening g5.} Ke5 $2 {[%mdl 40960] Precision: White = 52%, Black = 52%. . An unexpected result.} (75... Rh8+ $11 76. Kg3 Rh7) 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Van Delft, Merijn"]
[Black "Perske, Thore"]
[Result "1/2-1/2"]
[ECO "C18"]
[WhiteElo "2384"]
[BlackElo "2413"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,107,0,1,0,12,0,6,12,108,107,113,104,90,88,172,182,167,160,216,9,15,0,0,0,0,0,0,0,0,0,13,14,44,5,22,-8,-2,-9,-9,-9,-8,-12,-12,-12,-20,-17,-23,-20,-13,-97,-8,-8,-8,-8,-8,-29,-29,-29,-29,-29,-29,-29,-29,-29,-29,-29,-29,-29,-29,-29,0,0,0,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qa5 7. Bd2 Qa4 8. Qg4 Kf8 9. Nf3 Ne7 10. Be2 {C18: French: 3 Nc3 Bb4: Main line: 7 h4 and 7 Qg4} (10. h3 Nd7 11. Bd3 c4 12. Be2 Qxc2 13. O-O h6 14. Rfe1 Qe4 15. Qxe4 dxe4 16. Nh2 Nb6 17. a4 Bd7 {1-0 (60) Motylev,A (2660)-Kovalenko,I (2667) Poikovsky 2016}) 10... Nbc6 11. O-O Qxc2 (11... b6 {seems wilder.} 12. Qf4 Ba6 13. Bxa6 Qxa6 14. dxc5 bxc5 15. Ng5 Nd8) 12. dxc5 Qe4 (12... Nxe5 $11 13. Nxe5 Qxd2) 13. Qxe4 $16 dxe4 {[#]} 14. Ng5 $1 Nxe5 15. Nxe4 f5 $146 (15... Bd7 $16) ({Predecessor:} 15... N7c6 16. f4 Nd7 17. Be3 Ke7 {1-0 (37) Haug,J (2307)-Robertsen,B (1809) Oslo 2016}) 16. Nd6 $18 Nd7 17. Bf3 e5 (17... Nxc5 $16 {was necessary.} 18. Rfb1 e5) 18. Nxc8 $2 (18. Be3 $18) 18... Rxc8 $11 19. Bxb7 Rc7 20. Rab1 Kf7 21. c6 Nxc6 22. Bxc6 Rxc6 23. Rb7 Rd6 24. Be3 f4 25. Bxa7 (25. Bc5 $5 Rd5 26. Bb4 $11 (26. Bxa7 Rc8 $11) (26. Rxa7 Rxc5 27. Rxd7+ Kg6 $11)) 25... Rc8 26. h4 Ke6 27. Rc1 Rdc6 28. f3 Rxc3 29. Rxc3 Rxc3 {[%mdl 4096] Endgame KRB-KRN} 30. a4 Ra3 31. Rb4 Ra1+ 32. Kh2 h6 33. g3 {[#]} (33. g4 $11) 33... g5 ({Better is} 33... Ra2+ $1 $17 34. Kh3 fxg3 35. Kxg3 Nf6) 34. hxg5 hxg5 35. gxf4 gxf4 36. Kg2 (36. Bb6 $5) 36... Ra2+ 37. Kf1 Kf5 38. Bb8 Nxb8 39. Rxb8 Rxa4 {KR-KR} 40. Rb2 Ra3 41. Kf2 Kg5 42. Rc2 Kh4 43. Kg2 {[#]} e4 $1 {[%mdl 512]} 44. fxe4 {The position is equal.} Kg4 45. e5 Re3 {[#]} 46. e6 $1 {[%mdl 512]} Rxe6 47. Kf2 Rh6 {( -> ...Rh2+)} 48. Rc3 Rh2+ 49. Kf1 $1 Rd2 50. Ra3 f3 {Strongly threatening ...Kg3.} 51. Ra8 Rd1+ 52. Kf2 Rd2+ 53. Kf1 Rd1+ 54. Kf2 {Precision: White = 63%, Black = 52%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Ypma, Peter"]
[Black "Kuipers, Stefan"]
[Result "1/2-1/2"]
[ECO "A01"]
[WhiteElo "2283"]
[BlackElo "2388"]
[Annotator "NA"]
[PlyCount "34"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

{[%evp 8,32,-2,-6,32767,32767,0,21,27,24,16,7,25,4,35,28,30,18,32767,32767,24,14,7,25,20,-14,12]} 1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 4. Bb5 Bd6 5. Ne2 {LiveBook: 112 Games} O-O {A01: Nimzowitsch-Larsen Opening} (5... a6 6. Bxc6 dxc6 7. d3 Qe7 8. Nd2 Be6 9. a4 O-O-O 10. a5 h5 11. Ra4 h4 12. h3 Nd7 13. Qa1 {0-1 (58) Rapport,R (2694)-Riazantsev,A (2654) Geneve 2017}) 6. O-O e4 7. Ng3 Be5 8. Bxe5 $146 ({Predecessor:} 8. Qc1 Re8 9. d4 exd3 10. cxd3 Ng4 11. Bxe5 Ncxe5 12. d4 Ng6 13. Nd2 {½-½ (30) Sundararajan,K (2424)-Wichmann,C (2361) Dresden 2014}) 8... Nxe5 9. d4 exd3 10. cxd3 d5 11. d4 Ng6 12. Be2 Re8 13. Nd2 Qd6 14. Rc1 c6 15. Qc2 Bg4 16. Qc5 Qd7 $11 17. b4 Bxe2 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Le Clercq, Maxim"]
[Black "Geboers, Jimmy"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "1906"]
[BlackElo "1852"]
[Annotator "NA"]
[PlyCount "75"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 a5 7. a4 {LiveBook: 3 Games} cxd4 8. cxd4 Bb4+ 9. Nc3 Nge7 10. Bd3 Bd7 11. Be3 $11 Ng6 12. O-O Ngxe5 13. dxe5 d4 14. Nxd4 Nxd4 15. Bb5 Bc5 16. Bxd7+ Kxd7 17. Nb5 Rhd8 18. Bxd4 Bxd4 19. Qxd4+ Qxd4 20. Nxd4 Ke7 21. Nb5 Rd2 22. Rac1 Rad8 23. Rc7+ R8d7 24. Rfc1 Rxb2 25. g3 Rb4 26. Rxd7+ Kxd7 27. Rc7+ Ke8 28. Rxb7 Rxa4 29. Nd6+ Kf8 30. Rxf7+ Kg8 31. Re7 h6 32. Re8+ Kh7 33. Rxe6 Ra1+ 34. Kg2 a4 35. Nf5 a3 36. Ra6 a2 37. Ne3 Kg8 38. Nc2 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Van der Knaap, Jan"]
[Black "Coiffait, Casimir"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1866"]
[BlackElo "1853"]
[Annotator "NA"]
[PlyCount "94"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. a3 f6 7. Bd3 fxe5 {LiveBook: 54 Games} 8. Nxe5 Nxe5 9. dxe5 g6 10. O-O Nh6 11. Nd2 Nf7 $14 12. f4 Bg7 13. Nf3 Qc7 14. Be3 O-O-O 15. b4 c4 16. Bc2 g5 17. Qe2 gxf4 18. Bxf4 Rdf8 19. Rae1 Qd8 20. Qe3 Kb8 21. Nd4 h5 22. Bg6 Nh6 23. h3 h4 24. Bg5 Qc8 25. Rf4 Be8 26. Bc2 Nf7 27. Bf6 Bh6 28. Bxh8 Rxh8 29. Qf2 Bxf4 30. Qxf4 Qd7 31. Rf1 Qe7 32. Bg6 Nd8 33. Qf6 Qxf6 34. Rxf6 Bxg6 35. Rxg6 Rh5 36. Nxe6 Nxe6 37. Rxe6 Kc7 38. Kf2 Rg5 39. Re7+ Kc6 40. Rh7 Rf5+ 41. Kg1 Rf4 42. Rh6+ Kc7 43. Rd6 d4 44. cxd4 c3 45. Rd5 b6 46. e6 c2 47. Rd7+ Kc8 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Sandipan, Chanda"]
[Black "Ypma, Peter"]
[Result "1-0"]
[ECO "A21"]
[WhiteElo "2575"]
[BlackElo "2283"]
[Annotator "TA"]
[PlyCount "49"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,49,60,52,52,62,55,54,61,214,150,180,164,152,160,198,121,121,108,115,114,152,137,303,301,359,333,324,231,231,164,165,132,157,130,133,144,193,191,225,211,646,645]} 1. c4 e5 2. Nc3 d6 3. Nf3 f5 4. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} (4. g3 c6 5. d4 e4 6. Ng5 Be7 7. Nh3 Nf6 8. Bg5 O-O 9. Nf4 Na6 10. e3 Nc7 11. h4 Ne6 12. Nxe6 Bxe6 13. Be2 h6 14. Bxf6 Bxf6 15. h5 c5 16. dxc5 Bxc3+ 17. bxc3 dxc5 {½-½ (36) Wojtaszek,R (2749)-Agrest,E (2593) Tallinn 2016}) 4... Nc6 5. d5 Nce7 6. e4 {A21: English Opening: 1...e5 2 Nc3} g6 7. c5 Nf6 8. Bb5+ $146 {White is slightly better.} ({Find the theoretical novelty and annotate with similar games:} 8. Ng5 Bg7 9. Bc4 O-O 10. O-O fxe4 11. Ncxe4 Nxe4 12. Nxe4 Bf5 13. f3 Kh8 {0-1 (73) Ferreira,A (2221)-Danek,P (2234) Dos Hermanas 2003}) 8... c6 $2 (8... Kf7 $1 $14) 9. dxc6 Nxc6 10. Bg5 {[#] aiming for Nxe5!} h6 11. Bxf6 Qxf6 12. Qd5 ({White should try} 12. O-O $18) 12... Bd7 $16 13. O-O-O $36 {[%mdl 2048] White has strong initiative.} O-O-O 14. cxd6 Bg7 15. Kb1 Rhe8 $2 {[#]} (15... Kb8 $16 16. Rhe1 Rhf8) 16. Qc5 $18 Bf8 17. Bxc6 Bxc6 18. Nb5 Kd7 19. Nc7 {Black must now prevent Nd5.} ({Less strong is} 19. Nxa7 Bxe4+ 20. Ka1 Bxd6 $16) 19... Bxd6 20. Nxe8 Kxe8 21. Qxa7 Bxe4+ 22. Ka1 g5 23. Rhe1 g4 24. Nd2 Bb8 $2 (24... Bxg2 25. Nc4 Bc6) 25. Nxe4 {Precision: White = 80%, Black = 37%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Shyam, Sundar"]
[Black "Vrolijk, Liam"]
[Result "1-0"]
[ECO "C03"]
[WhiteElo "2534"]
[BlackElo "2419"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,95,11,8,31,20,27,0,18,22,19,0,0,0,0,0,0,0,-4,0,4,14,7,0,41,30,29,38,46,35,92,84,126,0,202,214,208,218,211,211,211,209,210,193,193,169,220,219,219,211,215,216,223,202,193,41,44,79,200,200,250,194,191,169,125,119,302,256,773,752,12832,12834,12841,12839,29988,29989,29990,29991,29994,29995,29995,29996]} 1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 cxd4 5. Nxd4 Nf6 6. exd5 Nxd5 7. c3 Be7 8. N2f3 O-O 9. Bd3 b6 {C03: French Tarrasch: Unusual Black 3rd moves} (9... Nc6 10. Nxc6 bxc6 11. O-O Qc7 12. Qe2 Nf4 13. Bxf4 Qxf4 14. Rad1 Bf6 15. Be4 Rb8 16. Bxc6 Rb6 17. Be4 {½-½ (31) Ortiz Suarez,I (2568)-Espinosa Veloz,E (2499) Merida 2016}) 10. O-O Bb7 11. Qc2 h6 {The position is equal.} 12. Qe2 {Strongly threatening Qe4.} Nd7 13. Nxe6 fxe6 14. Qxe6+ Kh8 15. Qg6 {[%csl Gd3][%cal Rg6h7]} N5f6 $146 {[#] ...Bxf3 is the strong threat.} ({Find the theoretical novelty and annotate with similar games:} 15... N7f6 16. Bxh6 gxh6 17. Qxh6+ {1-0 (33) Csiba,D (2327)-Peitl,T (2167) Ruzomberok 2010}) 16. Bxh6 $1 {[%csl Gh6][%cal Rg6g7][%mdl 512]} Rg8 $1 (16... gxh6 17. Qxh6+) 17. Bf4 $1 {And now Ng5 would win.} Bxf3 18. gxf3 Nf8 $132 {[%mdl 2048] Black is not keeping still} (18... Nc5 $6 19. Bc4 $16) 19. Qf5 Rc8 20. Qh3+ {[%mdl 1024] White has compensation.} N8h7 21. Rad1 Qe8 $1 22. Rfe1 {Threatens to win with Bd6!} Qf7 ({Black should play} 22... Rc5 $14) 23. Bg5 {Black must now prevent Rxe7!} Rce8 24. f4 ({White should try} 24. Kf1 $1 $16) 24... Bd8 $2 (24... Bc5 $11) 25. Rxe8 $18 Rxe8 26. Bxh7 $1 Nxh7 27. Rxd8 Rxd8 28. Bxd8 Qxa2 29. Bg5 Kg8 30. Kg2 Qc4 (30... Nxg5 $142 31. Qc8+ (31. fxg5 Qd5+ 32. Kg3 Qxg5+ 33. Qg4 Qb5 $14) 31... Kh7 32. Qf5+ (32. fxg5 Qd5+ 33. Kg3 Qxg5+ 34. Qg4 Qb5 $16) 32... g6 33. Qxg5 Qe6) 31. Qf3 Nf8 32. f5 Nd7 33. Be3 Ne5 34. Qa8+ Kh7 35. Bd4 $2 ({And not} 35. Qxa7 Qg4+ 36. Kf1 Qd1+ 37. Kg2 Qg4+ 38. Kf1 Qd1+ 39. Kg2 Qg4+ $11) (35. h3 $1 $18) 35... Nc6 $14 36. b3 Qe2 (36... Qb5 $16) 37. h3 $1 $18 (37. Qxc6 Qg4+ 38. Kh1 Qd1+ 39. Kg2 Qg4+ 40. Kh1 Qd1+ 41. Kg2 Qg4+ $11) 37... Qe4+ 38. f3 Qc2+ 39. Kg3 Nxd4 40. cxd4 {[%mdl 4096] Endgame KQ-KQ} Qc1 $2 {[#]} (40... Qxf5 $16 41. Qe4 (41. Qxa7 Qg5+ 42. Kh2 Qd2+ 43. Kh1 Qf2 $11) 41... Kg6) 41. Qe4 $1 ({Worse is} 41. Qxa7 Qg5+ 42. Kh2 Qd2+ 43. Kh1 Qd1+ 44. Kh2 Qd2+ 45. Kg1 Qd1+ 46. Kf2 Qd2+ 47. Kg3 Qg5+ 48. Kh2 Qd2+ $11) 41... Qg1+ $2 (41... Qg5+ 42. Qg4 Qc1) 42. Kh4 Qf2+ 43. Kh5 Qg1 44. d5 a5 45. d6 {White mates.} Qg3 {[#]} 46. h4 $1 Qxd6 47. f6+ $1 Kg8 48. Qe8+ {Precision: White = 63%, Black = 39%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Pijpers, Arthur"]
[Black "Van Delft, Merijn"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2457"]
[BlackElo "2384"]
[Annotator "TA"]
[PlyCount "177"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,177,22,16,17,17,17,20,17,22,22,27,22,14,17,72,63,72,73,83,77,111,100,116,115,118,111,143,150,141,0,240,206,387,366,656,492,485,482,471,278,282,258,194,195,211,197,268,204,227,121,127,79,78,83,87,90,85,84,100,36,46,40,42,39,33,33,38,37,39,41,66,27,62,47,42,40,91,35,57,35,35,35,37,35,35,34,34,8,6,0,6,6,10,6,6,6,6,6,6,6,6,0,0,-706,0,0,16,6,6,6,6,6,6,6,6,6,31,31,31,6,6,6,6,6,14,6,18,6,14,0,14,22,46,46,48,48,97,97,104,104,104,97,97,97,127,118,302,273,266,260,260,247,224,137,421,425,895,888,1704,1466,1631,1681,1285,1429,1303,1220,29970,29967,29976,29978]} 1. e4 c6 2. d4 d5 3. e5 c5 4. Nf3 cxd4 5. Nxd4 e6 6. Nd2 {B12: Caro-Kann: Advance Variation} (6. c4 Bb4+ 7. Nc3 Ne7 8. Be2 Nbc6 9. Nxc6 Nxc6 10. O-O d4 11. Ne4 Nxe5 12. Bf4 Nc6 13. c5 {1-0 (45) Ragger,M (2697)-Van Foreest,J (2612) Wijk aan Zee 2017}) 6... Nc6 7. N2f3 Nge7 8. Bd3 {The position is equal.} Nxd4 9. Nxd4 Nc6 10. Nf3 Qc7 $146 ({NOTEXT:} 10... f6 11. Qe2 fxe5 12. Nxe5 Nxe5 13. Qxe5 {1-0 (67) Kryakvin,D (2566)-Airapetian,G (2440) Sochi 2012}) 11. O-O g6 (11... Be7 $11) 12. Bf4 $36 {[%mdl 2048] White is pushing.} Bg7 {[%cal Rc6e5]} 13. Re1 h6 14. Rc1 g5 15. Bg3 Qb6 16. c4 Qxb2 17. cxd5 exd5 18. e6 Bxe6 19. Rb1 (19. Bd6 $1 $16 {And now Rb1 would win.} Rd8 20. Bc5) 19... Qxa2 $2 (19... Qf6 $1 $11) 20. Rxb7 $18 ({Weaker is} 20. Re2 Qa3 $17) 20... O-O $2 {[#]} (20... Nd8 {was called for.} 21. Rc7 Kf8) 21. Nxg5 $1 {[%mdl 512]} Rfe8 $2 ({Avoid the trap} 21... hxg5 $2 22. Qh5 $18) (21... Rae8 22. Nxe6 Rxe6 23. Rxe6 fxe6) 22. Nxe6 Rxe6 23. Rxe6 fxe6 24. h3 (24. Rc7 $142) 24... Qa1 25. Bb1 Nd8 26. Rd7 {[%mdl 1024] White has strong compensation.} Nf7 27. Qd3 $1 Rc8 (27... Re8 {keeps fighting.} 28. Rb7 Rd8) 28. Kh2 Ng5 29. Qg6 (29. h4 $1 $18 {[%cal Rh4g5]} Ne4 30. Rxd5 $1 {[%mdl 512]} Nxg3 31. fxg3) 29... Qf6 $16 30. h4 Qxg6 31. Bxg6 Ne4 32. Bf7+ Kh8 33. Bxe6 Nxg3 34. fxg3 {[%mdl 4096] Endgame KRB-KRB} (34. Kxg3 $16 {Strongly threatening f4.} Rf8 35. Rxd5) 34... Re8 35. Bf7 Re3 36. Rd8+ Kh7 37. Bxd5 Be5 38. Rd7+ Kg6 39. Bf3 a5 40. Ra7 Ra3 41. Ra6+ Kg7 42. Kh3 a4 (42... Ra4 $14) 43. h5 (43. Kg4 $16) 43... Bf6 44. Kg4 Ra1 45. Kf5 Bg5 46. Ra7+ Kf8 47. Kg6 a3 48. Bd5 Rd1 49. Bc4 Rd6+ 50. Kf5 Rc6 51. Bd5 Rc3 52. g4 Ke8 53. Be4 Kd8 54. Ke6 Be3 55. Rd7+ Kc8 {...a2 is the strong threat.} 56. Bb7+ Kb8 {Threatens to win with ...a2.} 57. Bd5 Bf4 58. Rb7+ Kc8 59. Ra7 (59. Kf5 $5 {[%cal Rf5f4]} Be3 60. Rf7 $14) 59... Re3+ 60. Kf5 Bg5 61. Be4 Kb8 62. Ra6 Kc7 63. Ke5 Rb3 64. Bd5 Rd3 65. Rc6+ Kd7 66. Rb6 Kc7 (66... Bc1 $5 {[%cal Rc1b2]} 67. Rb7+ Kd8 $14) 67. Rb7+ Kc8 {( -> ...Rxd5+!)} 68. Ra7 Kb8 69. Ra8+ Kc7 70. Ra6 Be3 71. Rc6+ Kd7 72. Ke4 a2 73. Ra6 ({Much worse is} 73. Kxd3 $6 a1=Q $11) 73... Rd1 74. Rxa2 (74. Bxa2 {seems wilder.} Bg5 75. g3 Rf1 76. Bd5 Rf2 77. Ra5) 74... Bg5 75. Ke5 Re1+ 76. Be4 Kc7 77. Ra7+ Kb6 $2 (77... Kd8 $16 78. Rg7 Ra1) 78. Rb7+ Kc5 79. Rc7+ Kb4 80. Rg7 Bd2 {White must now prevent ...Bc3+.} 81. Kd5 Be3 $2 {[%mdl 8192] [#]} (81... Rc1 $16 82. Rb7+ Kc3) 82. g5 $1 $18 Bxg5 {[#]} (82... Rh1 $142 83. Rb7+ Kc3 84. Rc7+ Kb3) 83. Rxg5 $1 {[%mdl 512]} hxg5 {KR-KB} 84. h6 {[%cal Bh5h6,Bh6h7][%mdl 32]} Rh1 85. h7 g4 86. Ke5 Kc5 87. Bg6 Rh2 88. Kf6 Kd4 89. Kg5 {Precision: White = 62%, Black = 41%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Perske, Thore"]
[Black "Nijboer, Friso"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "2413"]
[BlackElo "2528"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,105,0,0,0,0,0,0,0,-6,0,0,-7,19,-47,9,2,34,39,81,75,128,121,175,191,253,191,190,166,176,167,172,141,164,123,167,176,143,135,208,200,245,250,206,121,229,216,235,225,219,233,215,221,231,204,268,271,347,321,278,265,262,250,560,558,558,548,540,538,513,446,450,446,5832,4640,5607,441,343,0,1448,668,29956,3062,29954,29962,29967,29968,12391,8502,29953,29956,8502,7426]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. O-O Nge7 5. c3 a6 6. Bxc6 Nxc6 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6} 7. d4 cxd4 8. cxd4 d5 {LiveBook: 5 Games. The position is equal.} 9. exd5 exd5 10. Re1+ (10. Nc3 Be7 11. Bf4 Be6 12. Ne5 Rc8 13. Na4 O-O 14. Rc1 Nxe5 15. Rxc8 Qxc8 16. Bxe5 {½-½ (27) Wang,Y (2445)-Kulaots,K (2578) Moscow 2016}) 10... Be7 11. Bg5 f6 12. Bf4 O-O 13. Nc3 g5 $146 ({Predecessor:} 13... Bg4 14. h3 Bxf3 15. Qxf3 Nxd4 16. Qxd5+ Qxd5 17. Nxd5 {0-1 (53) Lagunov,E-Warszawski,B Porz 1991}) 14. Be3 ({White should try} 14. Bg3 $11) 14... Bf5 (14... Bg4 $15) 15. Qb3 Nb4 {[#] And now ...Bc2 would win.} 16. Rec1 Kg7 17. a3 Nc6 (17... Nd3 $142) 18. Qxb7 $16 Na5 (18... Qd6 $16) 19. Qxd5 $18 Bd3 (19... Qxd5 $142 20. Nxd5 Bd6) 20. b4 Nc4 21. Rd1 Nxe3 22. Qxd8 Rfxd8 23. Rxd3 Nd5 24. Re1 Kf7 25. Nxd5 Rxd5 26. Nd2 Bd8 (26... Rc8 $16 {might work better.} 27. Rh3 h5) 27. Rc1 a5 28. Rc5 Rd7 {[#]} 29. bxa5 (29. b5 $1 $18) 29... Bxa5 (29... Rxa5 $16 30. Rcc3 Bb6) 30. Nc4 Bd8 31. d5 Rc7 32. Rxc7+ Bxc7 {[%mdl 4096] Endgame KRB-KRN} 33. Kf1 h5 34. h3 Rb8 35. Ke2 g4 36. hxg4 hxg4 37. f3 gxf3+ 38. gxf3 f5 $2 (38... Bf4 {is a better chance.} 39. Rd4 Bh2) 39. d6 {[%cal Bd5d6,Bd6d7][%mdl 32]} Bd8 40. Ne5+ Ke6 41. Nc6 Rb2+ 42. Kd1 Kd7 43. Nxd8 Kxd8 {KR-KR} 44. d7 Rf2 45. Ke1 (45. Kc1 $142 f4 46. Kb1) 45... Rc2 46. Kd1 $2 (46. a4) 46... Rf2 $1 47. Kc1 Ra2 48. Kb1 (48. f4 $142 Re2 49. Rd4 Re6 50. Kb2 Rh6 51. a4 Rh3 52. a5 Rh1 53. Rd5) 48... Rh2 49. f4 Rf2 50. Rd4 Rg2 51. a4 {[%cal Ba3a4,Ba4a5,Ba5a6][%mdl 32]} Rh2 52. a5 Rg2 53. a6 {Precision: White = 74%, Black = 38%.} 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Kuipers, Stefan"]
[Black "Ikonnikov, Vyacheslav"]
[Result "1/2-1/2"]
[ECO "B32"]
[WhiteElo "2388"]
[BlackElo "2538"]
[Annotator "TA"]
[PlyCount "33"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,33,31,31,46,40,46,14,50,49,53,47,43,43,38,41]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. c4 Be7 7. N1c3 a6 8. Na3 Be6 9. Be2 Nd4 {B32: Sicilian: Löwenthal and Kalashnikov Variations} (9... Rc8 10. O-O Nf6 11. Be3 O-O 12. Qd2 Nd7 13. Rac1 Nc5 14. f3 Nd4 15. Bxd4 exd4 16. Qxd4 Qb6 17. Rc2 Bf6 18. Qe3 Qb4 19. Qd2 Na4 20. Nd5 {½-½ (37) Anand,V (2779)-Caruana,F (2823) Saint Louis 2016}) 10. O-O Nxe2+ 11. Qxe2 {LiveBook: 3 Games} Rc8 12. Nd5 Nf6 13. b3 $146 ({NOTEXT:} 13. Bd2 Bxd5 14. cxd5 O-O 15. Rfc1 Rxc1+ 16. Rxc1 Qd7 17. f3 Rc8 18. Rxc8+ Qxc8 19. Qc4 Qd7 20. Qb3 Ne8 21. Nc4 Bd8 22. Be3 g6 {½-½ (22) Van Riemsdijk,H (2350)-Dumont,S (2250) Sao Paulo 1989}) 13... O-O 14. Nxe7+ {White is slightly better.} Qxe7 15. Bg5 h6 16. Bxf6 Qxf6 17. Rfd1 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Warmerdam, Max"]
[Black "De Rover, Yong Hoon"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2357"]
[BlackElo "2385"]
[Annotator "NA"]
[PlyCount "66"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 h5 9. Qd2 Nbd7 10. Nd5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} Bxd5 11. exd5 g6 12. Be2 (12. O-O-O Nb6 13. Qa5 Bh6 14. Bxh6 Rxh6 15. Qd2 Rh8 16. f4 exf4 17. Qxf4 {½-½ (57) Ponomariov,R (2699)-Wang,H (2698) Danzhou 2017}) 12... Bg7 13. c4 b6 14. O-O O-O {LiveBook: 19 Games} 15. Rac1 a5 16. Na1 Nc5 17. Nc2 Qd7 $146 ({Predecessor:} 17... Nfd7) 18. Na3 e4 19. Nb5 exf3 20. Bxf3 Ng4 21. Bxg4 hxg4 22. Bf4 Ne4 23. Qe3 f5 24. Qxb6 Rfd8 25. Rc2 g5 26. Be3 {[#]} Rdc8 (26... f4 $1 $19 27. Bd4 g3) 27. Rfc1 f4 $15 28. Bd4 Rab8 29. Qa6 g3 30. hxg3 fxg3 31. Bxg7 Qxg7 32. Re1 Qh7 33. Rxe4 Rf8 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Thakoerdien, Jerrel"]
[Black "Pruijssers, Roeland"]
[Result "1/2-1/2"]
[ECO "E62"]
[WhiteElo "2193"]
[BlackElo "2508"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,72,44,52,52,116,54,36,43,54,61,62,16,14,15,19,0,0,0,0,0,0,-14,-19,-42,-35,-52,-62,-117,-69,-108,-69,-95,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. g3 d6 6. Bg2 Nc6 7. d5 Na5 8. b3 a6 9. Bb2 Rb8 10. Nd2 c5 11. O-O b5 12. Qc2 bxc4 13. bxc4 e6 14. Rab1 {E66: King's Indian: Fianchetto: 6...c5 7 0-0 Nc6 8 d5} exd5 (14... Bd7 $14) 15. cxd5 ({White should try} 15. Nxd5 $16 Rxb2 16. Rxb2) (15. Nxd5 Rxb2 16. Rxb2 Bf5 17. e4 Nxd5 18. cxd5 Bd7 19. Rbb1 h5 20. Rfe1 h4 21. e5 hxg3 22. hxg3 Bxe5 23. Rxe5 dxe5 24. Qxc5 {½-½ (41) Ubilava,E (2540)-Llorente Zaro,A (2422) Benasque 2007}) 15... Re8 $146 ({Predecessor:} 15... Bd7 16. Nce4 Rxb2 17. Rxb2 Nxd5 18. Nxd6 Be6 19. N6e4 c4 20. Rbb1 c3 21. Nf3 Qe7 {1-0 (37) Anic,D (2430)-Stull,N (2215) Metz 1991}) 16. Rfe1 {White is slightly better.} Bf5 17. e4 Bd7 18. Rec1 Rb4 $1 19. a3 Rd4 20. Nf3 Rc4 $36 {[%mdl 2048] Black has good play.} 21. Nd2 Ba4 22. Qd3 Rd4 23. Qxa6 {Nf3 is the strong threat.} (23. Qe2 {looks sharper.} Bd7 24. Rc2 c4 25. Qf1 Qc8 26. Nf3) 23... Rxd2 24. Nxa4 {And now Bxf6 would win.} Nxe4 25. Bxg7 Kxg7 26. Bxe4 (26. Rf1 $15 Nxf2 27. Rxf2 Rxf2 28. Kxf2 Qf6+ 29. Kg1 Qd4+ 30. Kh1 Qxa4 31. Rf1) 26... Rxe4 $17 27. Nc3 Rc4 28. Rd1 $1 {[%cal Rd1d2] [#]} Rc2 (28... Rxf2 $1 $17 {[%mdl 512]} 29. Kxf2 Rxc3) 29. Nb5 $11 {[#]The position is equal.} Rf4 $1 {[%mdl 512]} 30. gxf4 Qh4 31. Rf1 Qg4+ 32. Kh1 Qf3+ 33. Kg1 Nc4 34. Rbe1 (34. Nxd6 {[#] is a self mate.} Ne3 $1 {[%mdl 512]} 35. Nf5+ gxf5 36. Qh6+ Kxh6 37. Rb6+ Kg7 38. Rg6+ fxg6 39. fxe3 Qg2#) 34... Qg4+ 35. Kh1 Qh3 {( -> ...Ne3!)} 36. Nxd6 Qf3+ {Precision: White = 41%, Black = 65%.} 1/2-1/2

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Van Dael, Siem"]
[Black "Gavrilov, Alexei"]
[Result "0-1"]
[ECO "C13"]
[WhiteElo "2132"]
[BlackElo "2491"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,52,13,6,0,-13,-12,-29,-34,-32,-24,-43,-36,-32,-36,-79,-78,-93,-87,-91,-89,-81,-81,-82,-70,-71,-54,-42,-42,-56,29,40,128,118,113,102,139,-533,-545,-531,-523,-526,-524]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Nbd7 6. Bd3 Be7 {C13: French: Classical System: 4 Bg5 Be7, Alekhine-Chatard Attack} 7. Bxf6 {LiveBook: 6 Games} Nxf6 8. Nxf6+ Bxf6 {The position is equal.} 9. Nf3 c5 10. c3 cxd4 11. Nxd4 Bd7 $146 ({Find the theoretical novelty and annotate with similar games:} 11... Bxd4 12. Qa4+ Bd7 13. Qxd4 O-O 14. Be4 Qc7 {½-½ (14) Kochetkov,G (2394)-Andreev,E (2451) Evpatoria 2007}) 12. Be4 Qb6 13. O-O Qxb2 14. Rb1 Qxc3 15. Ne2 Qc4 16. Rxb7 Rd8 17. Bd3 Qd5 ({Reject} 17... Qxa2 18. Rxd7 Rxd7 19. Bb5 $11) 18. Rxa7 Bc6 {[%csl Gc6][%cal Rd5g2]} 19. Nf4 Qd4 $36 {[%mdl 2048] Black is pushing.} 20. Rc7 {Black should prevent Nxe6.} Qd6 {[#]} (20... Bd7 $15 21. Rc4 Qd6) 21. Nxe6 $1 $11 {[%mdl 512] Strongly threatening Re1.} Qxe6 (21... Bd7 $1 $14 22. Rxd7 Rxd7) 22. Re1 $16 Be5 {[#]} 23. Qh5 $1 {[%csl LRe5,LRh7]} Rd5 24. Bc4 $2 {[%mdl 8192] [#]} (24. Bf5 $16 {is forced if you want to stay better.} Qf6 25. Rc8+ Ke7 26. Rxh8) 24... Bxh2+ $1 $19 {[%mdl 512] Black is clearly winning.} 25. Kf1 {[#]} (25. Kxh2 Rxh5+) 25... Qxe1+ $1 {[%mdl 512]} 26. Kxe1 Rxh5 {Precision: White = 57%, Black = 49%.} 0-1

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Holwijn, Melvin"]
[Black "Le Clercq, Maxim"]
[Result "1-0"]
[ECO "D46"]
[WhiteElo "1932"]
[BlackElo "1906"]
[Annotator "NA"]
[PlyCount "150"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c6 5. e3 Nbd7 6. Bd3 Bd6 7. O-O O-O 8. e4 dxe4 9. Nxe4 Nxe4 10. Bxe4 f5 11. Bc2 Nf6 12. Re1 Qc7 13. c5 Bf4 14. Ne5 Bxe5 15. dxe5 Nd5 16. g4 fxg4 17. Qxg4 Qf7 18. Qh4 h6 19. Re4 Qg6+ 20. Kh1 Qf5 21. Bxh6 Qxf2 22. Bxg7 Qxh4 23. Rxh4 Rf4 24. Rg1 Rxh4 25. Bf6+ Kf8 26. Bxh4 b6 27. Rf1+ Kg7 28. cxb6 axb6 29. Rg1+ Kf8 30. a3 Ra7 31. Bg5 Ba6 32. Bh6+ Ke8 33. Rg8+ Kd7 34. Bg5 Rb7 35. h4 Ne7 36. Bxe7 Kxe7 37. Bd3 Kf7 38. Bxa6 Ra7 39. Rc8 Rxa6 40. Rxc6 Ra4 41. Rxb6 Rxh4+ 42. Kg2 Re4 43. Rb5 Ke7 44. Kf3 Re1 45. b4 Kd7 46. a4 Kc6 47. Kf4 Re2 48. Kg5 Rf2 49. Ra5 Kb6 50. Kg6 Rf4 51. Rb5+ Kc6 52. Rb8 Kc7 53. Rb5 Kc6 54. Rc5+ Kd7 55. Rb5 Kc6 56. Kg5 Rf5+ 57. Kg4 Rf1 58. Rc5+ Kb7 59. a5 Rb1 60. b5 Ra1 61. a6+ Kb6 62. Rc6+ Kxb5 63. Rxe6 Kc5 64. Rd6 Rf1 65. a7 Ra1 66. Rd7 Kc6 67. e6 Ra5 68. Rf7 Kd6 69. e7 Kd7 70. Rh7 Ra4+ 71. Kf5 Ra5+ 72. Kf6 Ra6+ 73. Kf7 Rxa7 74. e8=Q+ Kd6+ 75. Kg8 Kd5 1-0

[Event "Leiden Chess Tournament"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Coiffait, Casimir"]
[Black "Thibaut-Coignec, Leopold"]
[Result "1-0"]
[ECO "D05"]
[WhiteElo "1853"]
[BlackElo "1648"]
[Annotator "NA"]
[PlyCount "55"]
[EventDate "2017.??.??"]
[EventCountry "NED"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/5400+30:1800+30"]

1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 c5 5. b3 Nc6 6. Bb2 Bd6 7. O-O O-O 8. Ne5 Qc7 9. f4 b6 10. dxc5 Bxc5 11. Nxc6 Bxe3+ 12. Kh1 Qxc6 13. Bxf6 e5 14. Bxe5 Bb7 15. Qf3 d4 16. Qxc6 Bxc6 17. c3 dxc3 18. Nxc3 Rfd8 19. Be4 Rac8 20. Bxc6 Rxc6 21. Rad1 Rxd1 22. Rxd1 Rc8 23. Nd5 Bc5 24. b4 Bf8 25. f5 Rd8 26. Nf6+ gxf6 27. Rxd8 fxe5 28. f6 1-0

