[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.03"]
[Round "9"]
[White "Diez del Corral, Jesus"]
[Black "Kortschnoj, Viktor Lvovich"]
[Result "0-1"]
[ECO "E24"]
[WhiteElo "2360"]
[BlackElo "2665"]
[Annotator "Cabrilo,G"]
[PlyCount "63"]
[EventDate "1978.10.25"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Spain"]
[BlackTeam "Switzerland"]
[WhiteTeamCountry "ESP"]
[BlackTeamCountry "SUI"]

{Inf.26/646} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 d6 $5 (5... c5)
(5... b6 $5) 6. f3 Nh5 7. Nh3 e5 8. Nf2 O-O 9. e4 Nc6 10. g4 Nf6 11. Bg5 $6 (
11. Be3 $5) 11... b6 12. Qd2 (12. d5 Na5 13. Bd3 Ba6 14. Qe2 Nb3 {/\ Nc5-/+})
12... Na5 13. Rb1 Ba6 $15 {[><c4]} 14. Nd1 $2 (14. c5 $5) 14... Bxc4 15. Bxc4 (
15. Ne3 Bxf1 16. Rxf1 Nxe4 $1 $19) 15... Nxc4 16. Qd3 d5 $1 $17 17. O-O (17.
exd5 Qxd5 18. Bxf6 gxf6 19. O-O exd4 20. cxd4 Rfd8 $19) 17... h6 18. Bh4 (18.
Bxf6 Qxf6 19. exd5 Qg6 $1 20. Qxg6 fxg6 $17) 18... c6 19. f4 exf4 20. e5 g5 21.
exf6 Qxf6 $1 $19 22. Bf2 Qe6 $1 23. Nb2 (23. h3 Qe4 $1 $19) 23... Nxa3 24. Rbe1
Qxg4+ 25. Kh1 Rae8 26. Re5 Rxe5 27. dxe5 Qe6 28. Re1 Re8 29. h3 Nc4 30. Nxc4
dxc4 31. Qf3 Rd8 32. Kh2 0-1

[Event "World-ch14 Alekhine-Bogoljubow +8-3=15"]
[Site "Germany"]
[Date "1934.04.22"]
[Round "8"]
[White "Alekhine, Alexander"]
[Black "Bogoljubow, Efim"]
[Result "1/2-1/2"]
[ECO "E24"]
[Annotator "ChessBase"]
[PlyCount "127"]
[EventDate "1934.04.01"]
[EventType "match"]
[EventRounds "26"]
[EventCountry "GER"]
[SourceTitle "MainBase"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "2"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 (5... O-O 6. f3 d5 7. cxd5
(7. e3 c5 8. Qc2 Nc6 9. Bd3 $6 (9. cxd5 $5) 9... dxc4 10. Bxc4 e5 $1 11. dxc5
Qa5 12. Ne2 Qxc5 13. Bd3 e4 $1 $17 {0-1 Szulmistrat,E-Poehlmann,E/ corr/1991})
7... exd5 8. e3 Bf5 9. Ne2 Re8 $5) 6. Nf3 (6. f3 d5 7. e3 O-O (7... Nc6 8. cxd5
exd5 9. Bd3 O-O 10. Ne2 $14 Ne7 11. O-O Bf5 $2 12. Bxf5 Nxf5 13. e4 $1 dxe4 14.
fxe4 $16 {Euwe-Bogoljubow/Zьrich/1934}) 8. cxd5 exd5 9. Bd3 b6 $1 10. Ne2 Ba6
$10) 6... O-O 7. Bg5 d6 $5 (7... Qa5) 8. Qc2 Re8 9. e4 h6 10. Be3 (10. Bf4 cxd4
11. cxd4 e5 $1 12. dxe5 dxe5 13. Bxe5 $4 Rxe5 14. Nxe5 Qa5+ $19) (10. Bh4 cxd4
11. cxd4 Qa5+ 12. Nd2 Nc6 $1 13. Bxf6 gxf6 14. Qd3 e5 15. d5 Nd4 $17) 10... Qa5
11. Bd2 (11. Nd2 Ng4 {[%cal Ye6e5] /\e5=}) 11... e5 12. Bd3 Nc6 (12... Bg4 $5
13. Ng1 $1 {[%cal Yf2f3,Yg1e2] /\f3, Ne2} (13. O-O Bxf3 14. gxf3 Nh5 15. Qc1
Qd8 $17) (13. Nh4 exd4 14. cxd4 Qd8 $17)) 13. O-O (13. h3) 13... Qc7 14. d5 (
14. Be3 Bg4 15. dxc5 dxc5 16. Bxc5 Bxf3 (16... Na5 $5) 17. gxf3 Ne7 18. Be3 Ng6
19. Kh1 Nh5 {Lasker}) 14... Ne7 $15 15. Nh4 $6 (15. Ne1 $142 {[%cal Yg2g3,
Ye1g2,Yf2f3] /\g3, Ng2, f3=}) (15. Kh1 $142 {[%cal Yf3g1,Yg2g3,Yf2f3,Yf1f2] /
\Ng1, g3, f3, Rf2}) 15... g5 16. Nf5 $2 (16. f4 exf4 17. Bxf4 gxf4 $1 18. Rxf4
Kg7 $1 19. Raf1 Neg8 20. Qf2 Qe7 $19) 16... Nxf5 17. exf5 e4 18. Be2 Bxf5 19.
h4 (19. f3 exf3 20. Qxf5 fxe2 21. Rf2 (21. Rf3 Ne4 22. Be1 Re5 $17) 21... Ne4
$1 22. Rxe2 Nxd2 23. Rxd2 Re5 24. Qf6 Qe7 $17) 19... Nh7 20. g4 e3 $1 (20...
Bd7 $2 21. f4 $1 (21. Kh1 $2 Qc8 22. Rg1 Re5) (21. f3 $2 e3) 21... exf3 22. Bd3
(22. Rxf3 $2 Bxg4 (22... Rxe2 $2 23. Rxf7 $1) 23. Bd3 Nf8 $19) 22... Nf8 23.
hxg5 hxg5 24. Rxf3 $40) 21. Qxf5 Re5 $1 (21... exd2 22. Bd3 f6 $15 (22... Nf8
$15) 23. h5 Re5 24. Qf3) 22. Qd3 (22. Qxe5 exf2+ (22... dxe5 23. Bxe3) 23. Rxf2
dxe5 $17 {/-+}) 22... exd2 23. Qxd2 Rae8 24. Bd3 Qe7 25. Bf5 (25. f4 $2 Re3 $19
) 25... Re2 26. Qd3 Nf8 (26... Nf6 $2 27. Be6 $1 Re4 28. f3) 27. h5 Qe5 28.
Rab1 b6 {[%cal Ye5f4,Ye8e3] /\Qf4, R8e3} (28... Qf4 29. Rxb7 R8e3 30. Qxe3 Rxe3
31. fxe3 Qxe3+ 32. Kh1 Qxc3) 29. Qf3 Qf6 $138 (29... Ra2 $1 {Mьller} 30. Ra1 (
30. Rfe1 Qxe1+ 31. Rxe1 Rxe1+ 32. Kg2 Rxa3 33. Qg3 Re5 $17) 30... Qe2 31. Qxe2
(31. Qg3 Re5 32. f4 Rxa1 33. Rxa1 Re3 $19) 31... Rexe2 {[%cal Re2f2] /\Rf2} 32.
Rxa2 Rxa2 $17) 30. a4 Kg7 (30... Ra2) 31. Qd3 R8e7 32. Ra1 Qe5 33. a5 Nd7 34.
Qf3 (34. Bxd7 Rxd7 {[%cal Yf7f5] /\f5}) 34... Qf6 $2 (34... bxa5 35. Rxa5 Nb6
36. Bd3 Rd2 37. Ra3 Qf4 $17) 35. axb6 Nxb6 36. Rxa7 Nxc4 37. Rxe7 Rxe7 $17 {
/=/+} 38. Rd1 $6 (38. Qd3 Ne5 39. Qg3) 38... Ra7 39. Rc1 Qe5 40. Bd3 $6 (40.
Qe4 Qxe4 41. Bxe4 Nd2 42. Bg2 $15) 40... Nd2 $1 41. Qf5 $19 {the sealed move} (
41. Qe3 $19) (41. Qe2 Qf4 $1 42. Kg2 Re7 $1 43. Qd1 (43. Qxe7 Qxg4+ 44. Kh2
Nf3+ 45. Kh1 Qh3#) 43... Re1 $19) (41. Qd1 Qf4 $1 42. Be2 (42. Kg2 Re7 $1 43.
Rc2 (43. Bf5 Nf3 $19) 43... Re1 44. Qxd2 Qxg4+ 45. Kh2 Qh4+ 46. Kg2 Qh1+ 47.
Kg3 Rg1#) 42... Ne4 43. Qf1 Ra2 {[%cal Ra2e2,Rf4c1] /\Re2} 44. Re1 (44. Rb1 Nd2
) 44... Nxc3 $19) 41... Qxf5 42. Bxf5 Nf3+ $1 43. Kg2 (43. Kf1 Ra2 (43... Ra4 {
[%cal Rf3h2,Rh2g4] /\Nh2-g4} 44. Ke2 (44. c4 $2 Rxc4 $1) 44... Nh4 $1 45. Bd7
Ra2+ 46. Ke3 (46. Kf1 Rd2 47. c4 (47. Bc6 Nf3 {[%cal Yf3e5,Re5g4]}) 47... Nf3 {
[%cal Yf3e5,Re5c4,Re5g4,Rd2d4] /\Ne5}) 46... Ng2+ 47. Kf3 Nf4 $1 48. Bc6 (48.
Rd1 Rc2) (48. c4 $4 Nd3 49. Rf1 Ne5+ $19) 48... Nd3 (48... Rxf2+ $143 49. Kxf2
Nd3+ 50. Ke3 Nxc1 51. Ba4) 49. Rf1 Ne5+ 50. Kg3 Rc2 $19) 44. Rd1 Kf6 45. Rd3
Ne5 $19) 43... Nh4+ 44. Kg3 Nxf5+ 45. gxf5 Kf6 46. Re1 (46. Kg4 Ra2 47. f4 (47.
f3 Rg2+ 48. Kh3 Rd2) 47... gxf4 48. Kxf4 Rf2+ $19) 46... Ra4 (46... Re7 $1 47.
Rxe7 (47. Ra1 Re5 48. c4 Rxf5 49. Ra6 Ke5) 47... Kxe7 48. Kf3 (48. Kg4 Kf6 49.
f4 gxf4 50. Kxf4 c4 51. Ke4 Kg5 52. Kd4 Kxf5 53. Kxc4 Ke4 $19) 48... Kf6 49.
Ke4 g4 $1 50. Kf4 c4 51. Ke4 (51. Kxg4 Ke5 52. Kf3 Kxf5 $19) 51... Kg5 52. Kd4
Kxf5 53. Kxc4 Ke4 $19) 47. Re8 Rc4 (47... Rh4 $142) 48. Rh8 Rxc3+ 49. Kg2 (49.
Kg4 Rc4+ 50. Kg3 Rh4 51. Rxh6+ Ke5 52. Rh7 f6 53. h6 Kxd5 $19) 49... Kxf5 50.
Rxh6 f6 51. Rh7 Ke5 (51... Rd3 52. Rd7 Rxd5 53. h6 Rd4 54. h7 Rh4 55. Rxd6 Rxh7
56. Rd5+ Kf4 57. Rxc5) 52. h6 Ra3 (52... Rc4 53. Re7+ Kxd5 54. Re3 Ra4 $19 (
54... Rh4 $2 55. Rh3 $1)) 53. Re7+ Kxd5 54. h7 Ra8 55. Kg3 f5 56. f4 gxf4+ $2 (
56... g4 57. Kh4 c4 (57... Ra1 $19) 58. Kg5 c3 59. Kxf5 g3 60. Kg6 c2 61. Re1
Kd4 62. Kg7 Kd3 63. h8=Q Rxh8 64. Kxh8 Kd2 (64... g2 65. f5 Kd2 66. Rg1 c1=Q
$19) 65. Rg1 c1=Q $19) 57. Kxf4 c4 58. Kxf5 c3 (58... Kd4 59. Rd7 d5 60. Ke6
Re8+ 61. Re7 Ra8 62. Rd7 Ra6+ 63. Rd6) 59. Rd7 Rc8 $2 (59... Rh8 $1 $19 60. Kf6
(60. Rc7 Kd4) (60. Kg6 Kc6 61. Rg7 (61. Ra7 d5 62. Kg7 Rxh7+ 63. Kxh7 d4 $19)
61... c2 62. Rg8 c1=Q 63. Rxh8 Qg1+ 64. Kf5 (64. Kh6 Qh2+ 65. Kg6 Qg3+ 66. Kh6
Qh4+ 67. Kg6 Qg4+ 68. Kh6 Qe6+ $19) 64... Qf2+ 65. Ke4 Qh4+ $19) 60... Kc6) 60.
Rc7 Rf8+ 61. Kg6 Kd4 62. Kg7 Rb8 63. h8=Q Rxh8 64. Kxh8 (64. Kxh8 d5 65. Kg7
Kd3 66. Kf6 d4 67. Ke5 c2 68. Kd5 Kd2 69. Rxc2+ Kxc2 70. Kxd4) 1/2-1/2

[Event "Christmas Congress 1934/35-15 Premier"]
[Site "Hastings White Rock Pavilion"]
[Date "1935.01.01"]
[Round "5"]
[White "Lilienthal, Andor"]
[Black "Capablanca, Jose Raul"]
[Result "1-0"]
[ECO "E24"]
[Annotator "ChessBase"]
[PlyCount "52"]
[EventDate "1934.12.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "HCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "2"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 {1)Lilienthal:Schach war mein Leben.1988. S.67} Nf6 2. c4 e6 3. Nc3 Bb4
4. a3 Bxc3+ 5. bxc3 b6 6. f3 d5 7. Bg5 h6 8. Bh4 Ba6 9. e4 {Dieses Bauernopfer
wurde zuerst von Aljechin auch in Hastings ein Jahr davor angewendet. Sein
Gegner Eliskases lehnte es ab - ebenso wie auch jetzt Capablanca.} Bxc4 (9...
dxe4 10. fxe4 g5 11. Bg3 Nxe4 12. Be5 {Mit folgendem Qe2 oder Bd3 bietet Weiß
Angriffsmöglichkeiten.} Nd7) (9... g5 10. Bg3 dxe4 {Hier kan Weiß statt 11.
fxe4 vielleicht noch stärker} 11. Be5 {ziehen.Ein Beispiel:} Nbd7 12. Qa4 Bb7
13. h4 gxh4 (13... O-O $2 14. hxg5 hxg5 15. Qxd7 $1 $18) 14. Rxh4 Nd5 {Mit
Verwicklungen}) 10. Bxc4 dxc4 11. Qa4+ Qd7 12. Qxc4 Qc6 (12... Nc6 13. Ne2 Na5
14. Qd3 Qc6 15. O-O O-O-O 16. Rab1 (16. e5 {wurde als Verbesserung
vorgeschlagen} g5 17. exf6 gxh4 18. Qe4 Qc4 {Lilienthal: Ich fühlte, daß
Schwarz jetzt ausreichendes gegnspiel hat.} (18... Qxe4 19. fxe4 {Lilienthal:
Der Damentausch ist für Schwarz nicht gut, da der h-Bauer hngt.} {RR: Schwarz
kann sich mit} e5 {ausreichendes Gegenspiel sichern.} ({oder} 19... h3))) 16...
g5 17. Bg3 Nh5 18. f4 f6 19. Rb4 Rhg8 20. f5 e5 21. d5 Nxg3 22. Nxg3 Qc5+ 23.
Kh1 Kb7 24. Rfb1 c6 $11 {1/2-1/2 (67) Alekhine,A-Eliskases,E Hastings White
Rock Pavilion 1933}) 13. Qd3 {Lilienthal: Ich wich dem Damentausch aus, Denn
ich hoffte, mein bewegliches Bauernzentrum zur Geltung bringen zu können.}
Nbd7 14. Ne2 Rd8 ({Von dem sich anbietenden 0-0 oder 0-0-0 sah Capablanca wegen
} 14... O-O-O 15. c4 {ab. Zwar gewinnt Schwarz nach} Ne5 16. Qc3 Nxc4 {einen
Bauern, aber} 17. Rc1 b5 18. a4 a6 19. O-O $16 {läßt Weiss zu einer
ausgezeichneten Angriffsstellung kommen.}) (14... O-O 15. c4 (15. O-O) 15... e5
16. O-O Rad8 17. Bf2 $14) 15. O-O a5 (15... Ne5 16. Qc2 Nc4 17. d5 $1 exd5 18.
Nd4) 16. Qc2 (16. f4 $6 Nc5 17. Qc4 Qxe4 $1 18. Bxf6 gxf6 19. f5 Qd3 $1 20.
Qxd3 Nxd3 21. Rab1 e5 22. Rf3 Nf4 23. Nxf4 exf4 24. Rxf4 $11) 16... Qc4 17. f4
{Verhindert g7-g5 und droht e4-e5} (17. e5 g5 18. exf6 gxh4 19. Rfe1 Nxf6 20.
Nf4 O-O 21. Qd2 Kh7 22. Nd3 Nd5 23. Rac1 Ne7 24. Ne5 Qd5 25. Qf4 $11) 17... Rc8
18. f5 e5 19. dxe5 Qxe4 $2 {Lilienthal: Offen gesagt bin ich Capablanca für
diesen Zug sehr dankbar. Es sind schon viele Jahre seitdem vergangen, als wir
die Partie spielten. Aber wohin ich auch in der Sowjetunion zu Vortragskursen
reiste, baten mich die Schachliebhaber immer, ihnen zu zeigen, wie ich gegen
den großen Kubaner die Dame geopfert hatte.} (19... Qc5+ {Euwe} 20. Bf2 {
Lilienthal} (20. Nd4 Nxe5 21. Bf2 Nfg4 22. Ne6 Qd6 23. Nf4 Nxf2 24. Qxf2 Rd8
25. Qg3 O-O 26. Nh5 g5 27. Rfd1 Qc5+ 28. Kh1 Rxd1+ 29. Rxd1 Qe7 30. f6 Qe6 31.
h3 $11) 20... Qxe5 21. Bd4 Qxe4 22. Qxe4+ Nxe4 23. Bxg7 Rh7 24. f6 {Lilienthal
hält optimistisch die schwarze Stellung für hoffnungslos.} Ndc5 {RR} 25. Rad1
Nd6 26. Nd4 Kd7 $11) (19... Nxe5 {Lilienthal: die beste Verteidigung} 20. Nf4
Nfd7 21. Rad1 O-O 22. Nd5 {/\f5-f6 und Nd5-e7+} Qc5+ {RR} 23. Kh1 f6 24. Bf2
Qxa3 25. Ra1 Qd6 26. Rfd1 Nc5 27. Nf4 Qc6 28. Bxc5 Qxc5 29. Ne6 Qe3 30. Nxf8
Rxf8 $11) 20. exf6 $1 $18 {Der Grundgedanke des Opfers ist, daß der schwarze
König im Zentrum steckenbleibt. Auch die Türme sind in der Entwicklung
zurückgeblieben.} Qxc2 21. fxg7 Rg8 22. Nd4 {Die schwarze Dame gerät nun
auch ins Kreuzfeuer. Es gibt kein Feld, wohin der schwarze König ausweichen
könnte, Es droht ein tödliches Schach von e1 aus.} Qe4 (22... Qa4 23. Rae1+
Ne5 24. Rxe5+ Kd7 25. Rd5+ Ke8 26. Re1#) (22... Qd2 23. Rfe1+ Ne5 24. Rxe5+ Kd7
25. Rd5+ Ke8 26. Re1+ Qxe1+ 27. Bxe1 $18) 23. Rae1 Nc5 24. Rxe4+ Nxe4 25. Re1
Rxg7 26. Rxe4+ {Im Turnierbulletin stand unkorekt, daß Capablanca hier aufgab.
Noch nicht, er zog noch} Kd7 (26... Kd7 {Als er aber sah, daß Weiß nach} 27.
Re7+ Kd6 28. f6 Rh7 {mit} 29. Bg3+ {gewinnen kann, wartete er meine Antwort
nicht mehr ab. Er lächelte, reichte mir die Hand und gratulierte.}) 1-0

[Event "HUN-ch 55th"]
[Site "Kazincbarcika"]
[Date "2005.05.12"]
[Round "3"]
[White "Berkes, Ferenc"]
[Black "Almasi, Zoltan"]
[Result "1/2-1/2"]
[ECO "E24"]
[WhiteElo "2617"]
[BlackElo "2628"]
[Annotator "Gavrikov,V"]
[PlyCount "57"]
[EventDate "2005.05.10"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "HUN"]
[EventCategory "12"]
[SourceTitle "CBM 107"]
[Source "ChessBase"]
[SourceDate "2005.08.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.08.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 Nc6 $5 5. a3 ({A sound answer to} 5. e4 {is
} d5 {:} (5... e5 6. a3 $5 (6. d5 Nd4 7. a3 Be7 {/\ c5}) 6... Bxc3+ 7. bxc3 d6
8. Be3 O-O 9. Bd3 b6 10. Ne2 Ba6 11. Ng3 Na5 12. Qe2 Qe8 13. O-O Qa4 14. f4 $1
$36 {1/2-1/2 Moskalenko,V-Douven,R/Metz 1990/EXT 99 (38)}) 6. cxd5 (6. e5 Ng8
7. a3 Bxc3+ 8. bxc3 dxc4 9. Bxc4 $140 $2 Nxe5 $1) 6... exd5 7. e5 Ng8 8. Be3
Nge7 9. f4 Ba5 $5 10. Qd2 O-O 11. O-O-O f6 12. Bd3 fxe5 13. fxe5 Bf5 14. Nf3
Qd7 {1-0 Volkov,S-Ionov,S/St Petersburg 2004/CBM 102 (36) with solid position
for Black.}) 5... Bxc3+ 6. bxc3 b6 7. e4 Ba6 8. Bg5 Na5 (8... Qc8 9. Bd3 (9. e5
Ng8 10. f4 Na5) 9... Na5 10. Qe2 Qb7 {was played in Williams,
A-Dzindzichashvili,R/Thessaloniki 1984/EXT 97-B (44)} (10... d6 11. Nh3 Nd7 12.
f4 f6 13. Bh4 Qb7 14. O-O O-O-O 15. Rab1 $14 {1-0 Radjabov,T-Dizdarevic,E/
Mallorca 2004/CBM 104 no vc (40)}) {and now} 11. e5 Ng8 12. Be4 c6 13. Bd3 {
looks unpleasant for Black}) ({more popular move order is} 8... h6 9. Bh4 Na5 {
when White mostly continued} 10. Qa4 {but after} Qc8 {is not easy to achieve
any advantage,e.g.} 11. Nh3 (11. Bd3 Qb7 12. e5 Nd5 $1 13. cxd5 Bxd3 14. Rd1
Qa6 $1 15. dxe6 fxe6 16. Nh3 g5 17. Bg3 O-O-O 18. Nf2 Bg6 $132 {1/2-1/2
Rainieri de Luca,P-Vehi Bach,V/Barcelona 2003/EXT 2004 (41)}) 11... Qb7 12. Nf2
(12. d5 {1/2-1/2 Radjabov,T-Jakovenko,D/Saint Vincent 2001/CBM 080 ext (12)})
12... Qc6 13. Qxc6 dxc6 14. Bxf6 gxf6 15. Ng4 f5 16. exf5 exf5 17. Ne5 $11 {
1/2-1/2 McCambridge,V-Sosonko,G/New York 1984/MCD (29)}) 9. e5 h6 10. Bh4 g5
11. Bf2 Nh5 ({This retreat has a better reputation than} 11... Nh7 {which can
be met by} 12. f4 $1 (12. Qa4 $6 f5 $1 13. Bd3 O-O 14. Ne2 d5 15. exd6 cxd6 $17
{0-1 Lomaya,T-Antoshin,V/Moscow 1963/EXT 99 (39)}) 12... Qe7 (12... Bxc4 13.
Bxc4 Nxc4 $13) 13. Nf3 gxf4 $6 14. Bd3 $1 Ng5 15. h4 $44 {1-0 Spassky,
B-Nikolaevsky,Y/Moscow 1963/EXT 2000 (40)}) 12. h4 f5 $5 ({Black increases the
scope of his pieces on the kingside, but the immediate} 12... Bxc4 {is quite
playable alternative:} 13. hxg5 Qxg5 14. Nh3 Qe7 15. Bxc4 (15. g4 {gives Black
a supplementary possibility} Bxf1 16. Kxf1 Ng7 17. Nf4 h5 $1 18. Ke2 Qg5 {
0-1 Yakovich,Y-Minasian,A/Moscow 1991/URS-ch (30)}) 15... Nxc4 16. g4 Ng7 17.
Qa4 ({or} 17. Nf4 Qg5 $1 18. Nh3 (18. Nd3 $6 h5 19. Qe2 d5) (18. Qc1 $6 h5 19.
Nxh5 Qxc1+ 20. Rxc1 Nxh5 21. gxh5 f6 $1) 18... Qe7 19. Nf4 Qg5 $11) 17... Na5
18. Nf4 h5 ({also possible is} 18... Qg5 $5 19. Be3 Qe7 {when it is doubtful
if White has something better than a repetition of moves} 20. Bf2 Qg5 21. Be3)
19. Bh4 (19. Rh3 Qf8 $1 20. gxh5 Nf5 21. d5 Qg7 $1 $132) 19... hxg4 $1 (19...
Qf8 $2 20. O-O-O $16) 20. Bxe7 Rxh1+ 21. Kf2 Rxa1 22. Bf6 Ra2+ (22... g3+ 23.
Kxg3 Nf5+ 24. Kf2 c6 $13) 23. Kg1 Ra1+ 24. Kf2 Ra2+ {with perpetual check.})
13. g3 $146 {White creates the threat 14.hxg5 Qxg5 15.f4, however it seems to
me that this new move is also insufficient for cause Black serious
difficulties.} ({Wrong is} 13. exf6 $2 Qxf6 14. c5 Bxf1 15. Kxf1 g4 $1 16. Qd3
O-O $17 {0-1 Simagin,V-Petrosian,T/Moscow 1950/EXT 99/[ChessBase] (40)}) ({
strong looks} 13. hxg5 Qxg5 14. Nh3 Qg6 15. g4 {but Black has a way to solve
all his problems by} fxg4 $1 16. Bd3 Qf7 17. fxg4 Nf4 18. Nxf4 Qxf4 19. Bg6+ (
19. Qe2 O-O-O) 19... Kd8 20. Qe2 Kc8 $1 21. Qe3 Rf8 22. Qxf4 Rxf4 23. Rxh6 Rxg4
24. c5 Kb7 {0-1 Agrest,E-Sokolov,A/St Petersburg 1993/CBM 034 (39) with better
prospects for Black in this ending as Whiteґs queenside pawns are weak.}) 13...
f4 $1 (13... Ng7 $6 {is unsatisfactory after} 14. hxg5 Qxg5 15. Qa4 ({less
promising is} 15. Nh3 Qh5 16. c5 Bxf1 17. Kxf1 bxc5 18. dxc5 Nc6 19. Kg2 Qf7 (
19... Nxe5 $4 20. Bd4 d6 21. f4 $18) 20. Qe2 Nh5 $132) 15... O-O-O 16. Be2 Qg6
17. c5 Bb7 (17... Bxe2 18. Nxe2 Nh5 19. c4 $36) 18. Nh3 Nh5 19. Rg1) 14. hxg5
Qxg5 ({White might be able to claim an advantage after} 14... fxg3 $6 15. Be3 (
15. Rxh5 gxf2+ 16. Kxf2 Qe7 17. gxh6 Qf8 $44) 15... Ng7 16. gxh6 (16. Bd3 Nf5
17. Bxf5 exf5 18. Qc2 Nxc4 19. Bf4 Qe7 20. gxh6 O-O-O $13) 16... Nf5 17. Bf4
Bxc4 18. Bxc4 Nxc4 19. Qd3 b5 20. Ne2) 15. Nh3 Qg8 16. gxf4 $6 ({The
continuation} 16. g4 Ng3 17. Bxg3 fxg3 18. c5 (18. Rg1 Bxc4 19. Bxc4 Nxc4 20.
Rxg3 O-O-O $132) 18... Bxf1 19. Kxf1 bxc5 20. Kg2 h5 {gives Black adequate
counterplay but the text is obviously worse because weakens f5-square and
misplaces the knight on h3.}) 16... O-O-O $6 ({Undoubtedly stronger was} 16...
Bxc4 $1 17. Bxc4 Nxc4 18. Qd3 d5 $15) 17. f5 $1 exf5 18. f4 Nf6 $5 ({Black
prefers to sacrifice the material instead of} 18... Qf7 19. Be2 Ng7 20. d5 Bxc4
21. Bxc4 Nxc4 22. Qd3 Na5 23. c4 {when White has compensation for the pawn but
perhaps only enough for an equal game.}) 19. Bh4 ({After} 19. exf6 Re8+ 20. Kd2
Bxc4 {White does not succeed to obtain more than a draw in variation} 21. Rg1
Qe6 22. Bxc4 Qxc4 23. Rb1 Qa2+ 24. Kd3 Qc4+ 25. Kd2 Qa2+) 19... Ne4 20. Rg1 Qf7
21. Bxd8 Rxd8 22. Nf2 Bxc4 23. Nxe4 fxe4 24. f5 (24. Qg4 {is well answered by}
Bxf1 25. Rxf1 Qb3 26. Rc1 Qxa3 {, for example:} 27. Rc2 (27. Kf2 Nc4 28. f5
Qa2+ 29. Qe2 e3+ 30. Kf3 Nd2+ 31. Kxe3 Nxf1+ 32. Rxf1 Qb3 33. Qa6+ Kb8 34. Ra1
Qxc3+ 35. Ke2 Qc2+ 36. Ke3 Qc3+ $11) 27... Nc4 28. Qe2 d5 29. f5 Rg8 $1 30. f6
Qa1+ 31. Kf2 e3+ 32. Kf3 Qa4 33. f7 $140 $2 (33. Qd3 $13) 33... Nxe5+ $1 34.
Kxe3 Nxf7 $19) 24... Qxf5 25. Qg4 Qf7 26. Qxe4 c6 27. Bxc4 Qxc4 28. Rg3 Rf8 {
The unsafe position of White king makes it difficult to play for win and after}
29. Qe2 {draw was agreed.} (29. Qe2 Qb3 30. a4 Qd5 $44) 1/2-1/2

[Event "Candidates Tournament"]
[Site "Budapest"]
[Date "1950.05.09"]
[Round "14"]
[White "Kotov, Alexander"]
[Black "Keres, Paul"]
[Result "1-0"]
[ECO "E24"]
[Annotator "Knaak,R"]
[PlyCount "65"]
[EventDate "1950.04.11"]
[EventType "tourn"]
[EventRounds "18"]
[EventCountry "HUN"]
[SourceTitle "Candidates"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "2"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 Nc6 6. f3 b6 7. e4 Ba6 8. e5
(8. Bg5 h6 9. Bh4 Na5 10. Qa4 Qc8 $1 {Geller,E-Smyslov,V/URS-ch17/1949/Moscow/
1/2-1/2/}) 8... Ng8 9. Nh3 (9. Bd3 Na5 10. Qa4 f6 (10... f5) (10... Qc8)) 9...
Na5 10. Qa4 Ne7 (10... Qc8 $142) 11. Bd3 (11. Ng5 $5) (11. Bg5 $5) 11... O-O (
11... h6 $5 12. Nf4 O-O $13 {/\d6}) 12. Bg5 h6 13. Bh4 d5 $2 (13... Qe8 $142 $5
14. Bb1 d6 15. Qc2 Ng6) 14. Bb1 $16 g5 (14... Bxc4 15. Qc2 g6 16. Qd2 $5 (16.
Nf4 $1) 16... Kh7 17. Bf6 Nb3 18. Qf4 Nxa1 19. Qh4 Rh8 $1 20. Bxe7 Qe8 21. Nf4
$40) 15. Qc2 Ng6 16. Nf4 $1 gxh4 (16... Qe8 17. Nh5 $1 $18) 17. Nxg6 Re8 18.
Nh8 $1 {><f7} Re7 19. Qh7+ Kf8 20. f4 $1 Nxc4 21. f5 exf5 22. O-O $1 Bc8 23.
Bxf5 Bxf5 24. Rxf5 Ke8 25. Rxf7 Kd7 26. Qf5+ Kc6 27. Qf6+ Kd7 28. e6+ Kc6 (
28... Kd6 29. Rxe7 Qxe7 30. Nf7+ $18) 29. Rxe7 Qxh8 30. Rxc7+ $1 Kb5 (30...
Kxc7 31. Qe7+ Kc8 32. Rf1 $18) 31. Qe7 a5 32. Qd7+ Ka6 33. Rb1 1-0

[Event "Olympiad-39"]
[Site "Khanty-Mansiysk"]
[Date "2010.09.24"]
[Round "4.1"]
[White "Jobava, Baadur"]
[Black "Carlsen, Magnus"]
[Result "1-0"]
[ECO "E24"]
[WhiteElo "2710"]
[BlackElo "2826"]
[Annotator "Krasenkow,M"]
[PlyCount "127"]
[EventDate "2010.09.21"]
[EventType "team-swiss"]
[EventRounds "11"]
[EventCountry "RUS"]
[SourceTitle "CBM 139"]
[Source "ChessBase"]
[SourceDate "2010.11.18"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.18"]
[SourceQuality "1"]
[WhiteTeam "Georgia"]
[BlackTeam "Norway"]
[WhiteTeamCountry "GEO"]
[BlackTeamCountry "NOR"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 Nc6 {A rare continuation 
(with the idea of ...e6-e5), to which White replies with a genuine novelty on
move 6!} 6. e4 $5 $146 {[%mdl 8] Practice had seen:} (6. Bg5 e5 $5 7. e3 h6 8.
Bh4 Qe7 9. Nf3 d6 10. Be2 g5 11. Bg3 Ne4 12. Rc1 f5 {(..) 1/2 Stahlberg,
G-Porat,Y/Warsaw 1935/EXT 2004}) (6. Nf3 d6 $5 7. Nd2 e5 8. e4 $6 exd4 9. cxd4
Nxd4 10. Bb2 Ne6 11. Bd3 b6 12. O-O Bb7 13. Re1 O-O $15 {1/2 Kuzminykh,
E-Bronstein,D/Leningrad 1970/EXT 2001 (25)}) (6. e3 $5 e5 7. Bd3 O-O {leads to
a position from the 5...0-0 system}) (6. f3 e5 (6... d6 7. e4 O-O {leads to
the 5...0-0 system}) (6... b6 7. e4 Ba6 {leads to a popular position from the
5...b6 system (6.f3 Ba6 7.e4 Nc6).}) 7. e4 d6 8. Be3 b6 9. Bd3 Na5 10. Ne2 Ba6
11. Ng3 h6 (11... O-O $142 {- 5...0-0}) 12. O-O Qd7 13. Qe2 O-O-O $6 14. Nf5 $1
Rh7 15. c5 $1 $16 {1-0 Lazarev,E-Romantchouk,J/Ternopol 1964/EXT 1999 (22)})
6... Nxe4 7. Qg4 f5 (7... Nf6 8. Qxg7 Rg8 9. Qh6 e5 $5 {needs testing.}) 8.
Qxg7 Qf6 9. Qxf6 Nxf6 {This position presents a typical positional conflict:
White has a bishop pair with an asymmetrical pawn structure (which should
favour him) but his own pawn chain is damaged (doubled pawns). Such positions
are very hard to evaluate; usually the better player prevails.} 10. Nf3 b6 11.
d5 $5 {A curious pawn sacrifice, which Black, however, rejects.} Na5 (11...
exd5 12. cxd5 Nxd5 13. Bd3 $5 (13. Bc4 Nce7) 13... O-O 14. Bc4 Nce7 15. Bg5 Kg7
16. O-O-O $44) 12. Nd4 Kf7 13. dxe6+ dxe6 14. Bf4 Ba6 {Black keeps the tension.
He had a good chance to simplify the game:} (14... e5 $1 15. Bxe5 Re8 16. f4
Ng4 17. O-O-O (17. Be2 Nxe5 18. fxe5 Rxe5 19. O-O c5 $1 20. Bf3 Rb8 21. Nb5 Kf6
22. Nxa7 Bb7 $15) (17. Nf3 Nc6 $15) 17... Nf2 $1 (17... Nxe5 18. fxe5 Rxe5 19.
Bd3 $36 {[%csl Rf7]}) 18. Be2 Nxh1 19. Bh5+ Kf8 20. Rxh1 Bd7 $1 (20... Re7 $143
21. Bf3 Bb7 22. Bxb7 Nxb7 23. Nxf5 $44) 21. Bxe8 Rxe8 $15 {/=}) 15. Nf3 Ne4 16.
Ne5+ Kf6 17. f3 (17. h4 $5 Nxc3 18. Rh3 Ne4 19. Re3 $44 {[%cal Yg2g4]}) 17...
Nd6 18. O-O-O Rhd8 $6 {Again avoiding drawish lines like} (18... Naxc4 19. Nxc4
(19. Rxd6 Nxe5 $1 20. Bxe5+ Kxe5 21. Rc6 Bxf1 22. Rxf1 Kf6 23. Re1 Rae8 24.
Rxc7 Re7 25. Rc6 h5 $11) 19... Bxc4 (19... Nxc4 20. Rd4 e5 21. Bxc4 Bxc4 22.
Rxc4 exf4 $11) 20. Rxd6 $1 Bxf1 21. Rd7 Bb5 22. Rxc7 Rac8 $11) (18... Ndxc4 $6
19. Bxc4 Nxc4 20. Rhe1 Nd6 21. Nc6 $44) (18... Bxc4 $6 19. Rxd6 cxd6 20. Nxc4
Nxc4 21. Bxc4 Rac8 22. Bb3 Rxc3+ 23. Kb2 Rd3 24. Rc1 $132) ({To complicate the
game,} 18... Rhg8 $5 {was probably more appropriate; if} 19. h4 {then} Bxc4 {
gains in strength.}) ({Or the mysterious} 18... Rac8 $5 19. c5 Bxf1 20. Rhxf1
Nb3+ 21. Kc2 Nxc5 22. Rfe1 $44) 19. h4 $1 {[%mdl 160] Now White obtains
pressure on the kingside.} Nf7 20. Nd7+ Kg7 (20... Ke7 $2 21. Bg5+ $1 Nxg5 22.
hxg5 $16) 21. Rh3 $1 (21. g4 $5 Bxc4 22. Bh3 $36) 21... Kh8 $1 22. Bg5 $6 (22.
Bxc7 $142 Rdc8 23. Bf4 Nxc4 24. Rd4 $1 $16 {[%cal Yh3g3]} (24. Rg3 e5 $1 25.
Nxe5 Nfxe5 26. Bxe5+ Nxe5 27. Bxa6 Rxc3+ $11) 24... e5 $140 $2 25. Bxc4 $1 Bxc4
26. Nxe5 $18) 22... Nxg5 23. hxg5 Kg7 (23... Bxc4 24. g6 (24. Nf6 Rxd1+ 25.
Kxd1 Kg7 26. Rxh7+ Kg6) (24. Bxc4 $5 Nxc4 25. f4 Kg7 26. Rh6 $16 {-23...Kg7})
24... h6 $1 25. Bxc4 Nxc4 26. Rxh6+ Kg7 27. Rh7+ Kxg6 28. Rdh1 $40) 24. Rh6 $1
Bxc4 25. Bxc4 Nxc4 26. Rdh1 (26. f4 $5) 26... Rh8 27. f4 $6 (27. Rxe6 Rae8 28.
Rc6 Re7 (28... Nxa3 29. Nf6 $16 Re7 $140 30. Nd5 Rd7 31. Nxc7 $18 {[%cal Rc1b2]
}) 29. Nf6 Ne5 30. Nh5+ Kf8 31. Rf6+ $1 Rf7 32. Rh6 $16 {[%cal Yh5f4]}) 27...
c5 $6 (27... Rad8 $142 28. Nf6 c5 (28... Rd3 $2 29. Rxh7+ Rxh7 30. Rxh7+ Kg6
31. Rh6+ Kf7 32. Nh5 {[%cal Rg5g6]} Rxc3+ 33. Kb1 Rb3+ 34. Kc2 $18) 29. Rxh7+
$140 ({maybe it is better not to hurry:} 29. a4) 29... Rxh7 30. Rxh7+ Kg6 31.
Rh6+ Kf7 32. Nh5 Rg8 $1 {- Black holds on.}) 28. Rxe6 Rae8 29. Rxh7+ (29. Rxe8
$5 {was also good:} Rxe8 30. Nf6 Re3 (30... Rh8 31. Rh6 {etc.}) 31. Rxh7+ Kg6
32. Rh6+ Kf7 33. Nh5 Kg8 34. Rg6+ (34. g6 Re1+ 35. Kc2 Re6 $1 {-that's the
point!}) 34... Kf8 35. Rf6+ Kg8 (35... Ke7 36. g6) 36. g6 {[%cal Rg6g7]} Re1+
$8 37. Kc2 Rh1 38. Ng3 Ne3+ 39. Kd3 Nd5 40. Rc6 $1 Rd1+ 41. Kc4 Ne3+ 42. Kb5
$18) 29... Rxh7 30. Rxe8 {[%mdl 4096]} Kf7 (30... Nxa3 31. Ne5 {[%cal Yg2g4]})
(30... Rh1+ 31. Kc2 Nxa3+ 32. Kb3 Nb1 33. Re7+ $18) 31. Ra8 Rh1+ 32. Kc2 a5 (
32... Nxa3+ 33. Kb3 Nb5 34. Ne5+ Kg7 (34... Ke7 35. g6 Kf6 36. Rf8+ Kg7 37.
Rf7+ Kh8 38. g4 $1 $18) 35. g4 $1 fxg4 36. f5 {, and White's connected passed
pawns decide the game.}) (32... Ke6 33. Ne5 $1 Nxe5 34. Re8+ $18 {e.g.} Kd5 35.
Rxe5+ Kc4 36. g4 $1 fxg4 37. g6 Rh8 38. g7 Rg8 39. Rg5 b5 40. Kd2 a5 41. Rxg4
Kd5 42. Kd3 $18 {_|_}) 33. Ra7 (33. Kd3 $142 $1 b5 (33... Nb2+ 34. Ke2 Nc4 35.
Rf8+ Ke7 36. g6 $18) 34. Ra7) 33... Nxa3+ 34. Kd2 $1 Rh2 $2 (34... Nb5 35. Rb7
Nd6 {was the last chance. A possible line:} 36. Ne5+ Kg8 37. Rxb6 Ne4+ 38. Kd3
Rd1+ (38... Rc1 39. Kc4 {[%cal Yc4d5,Yd5e6]} a4 40. Rb8+ Kg7 41. Rb7+ Kg8 42.
Ra7 Nxc3 43. g3 $22 Kf8 (43... a3 44. Nd3 Rc2 45. Kb3) 44. Ng6+ Ke8 45. Nh4
Ne4+ 46. Kd5 Nxg3 47. Rxa4 $18) (38... a4 39. Kc4) 39. Kc4 Nd6+ 40. Kxc5 Ne4+
41. Kb5 Nxc3+ (41... Rb1+ 42. Kxa5 Rxb6 43. Kxb6 Nxc3 44. Kc6 $18) 42. Kc6 Ne2
43. Rb8+ Kg7 44. Rb7+ Kg8 45. Ng6 Rd4 46. Ne7+ Kf8 47. g6 Rb4 48. Ra7 Nxf4 49.
g3 $1 Ne6 50. Nd5 {, and White should win.}) 35. Nxb6+ Kg6 36. Rxa5 Rxg2+ 37.
Kd1 Nb1 (37... Nc2 38. Nd5) 38. Rxc5 {, and White converted his material
advantage without major problems:} Nd2 39. Nd5 Ne4 40. Rc6+ Kf7 41. Ne3 Rg3 42.
Ke2 Ke8 43. Re6+ Kf7 44. Re5 Nxc3+ 45. Kf2 Rh3 46. Rxf5+ Kg6 47. Rf6+ Kg7 48.
Nf5+ Kg8 49. Kg2 Rd3 50. Rd6 Ne2 51. Rg6+ Kh8 52. Rh6+ Kg8 53. Ne7+ Kf7 54. Ng6
Kg7 55. Kf2 Nc3 56. Ne7 Ne4+ 57. Ke2 Ra3 58. Nf5+ Kg8 59. Re6 Nc3+ 60. Kf3 Nd5+
61. Kg4 Ra1 62. Re5 Rg1+ 63. Kf3 Rf1+ 64. Kg2 1-0

[Event "EU-ch 13th"]
[Site "Plovdiv"]
[Date "2012.03.27"]
[Round "7"]
[White "Bosiocic, Marin"]
[Black "Postny, Evgeny"]
[Result "1/2-1/2"]
[ECO "E24"]
[WhiteElo "2562"]
[BlackElo "2662"]
[Annotator "Postny,E"]
[PlyCount "91"]
[EventDate "2012.03.20"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "BUL"]
[SourceTitle "CBM 148"]
[Source "ChessBase"]
[SourceDate "2012.05.16"]
[SourceVersion "1"]
[SourceVersionDate "2012.05.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 {The old Saemisch Variation is currently a
rare guest in grandmaster practice.} Bxc3+ 5. bxc3 d6 {The main move is 5...c5,
but I chose a different setup.} 6. f3 Nc6 $5 {This is quite rare. More common
moves are 6...c5 and 6...0-0. Korchnoi once played 6...Nh5!? - worth
investigation as well.} 7. e4 e5 8. Bg5 {This is natural, but the author of
the system developed the bishop on e3.} (8. Be3 b6 9. Bd3 Ba6 $4 (9... Na5 $5)
10. Qa4 Bb7 11. d5 $18 {1-0 Saemisch,F-Capablanca,J/Karlsbad 1929/HCL (62)})
8... Qe7 (8... h6 9. Bh4 (9. Be3 {is possible, of course, but then it's more
precise to play it one move earlier. The extra move h7-h6 might be useful for
Black.}) 9... g5 $6 (9... Qe7 $142) 10. Bf2 Ne7 11. h4 $14 {1/2-1/2 Yang,D 
(2378)-Papp,G (2542)/Lubbock 2010/CBM 135 Extra (25)}) 9. Ne2 Bd7 {Planning to
hide the king on the queenside.} 10. Ng3 h6 {Now I must play this in view of
the threat Ng3-h5.} 11. Be3 b6 12. Bd3 O-O-O 13. O-O $6 {Castling o opposite
sides usually leads to a sharp fight. The current game wasn't an exception. In
fact White wasn't forced to determine the location of his king right now.} (13.
Rb1 $1 {was a more flexible move which I was concerned about. Later on the
c4-c5 thrust will be on the agenda.} {Now} h5 $6 {would be met by} 14. h4)
13... h5 $1 {Now he wouldn't dare to play 14.h4, as the Ph4 would be an easy
target for Black's queen.} 14. Re1 g6 {Covering the f5-square.} (14... h4 $6
15. Nf5 Bxf5 16. exf5 $14) 15. Bf2 $6 {This move loses control over the
f4-square where Black's knight will arrive soon.} (15. Nh1 h4 16. Nf2 Nh5 17.
Qc1 {I would still prefer Black in this position, but both sides have chances.}
) 15... h4 16. Nf1 Nh5 17. Ne3 Qg5 18. c5 $6 {Sooner or later White has to go
for this breakthrough, but it wasn't really the best timing for this.} (18. Nd5
Bh3 19. Bf1 Bxg2 20. Be3 Nf4 21. Bxf4 exf4 22. Bxg2 h3 23. Ra2 $15) 18... dxc5
19. d5 Na5 {Basically Black now has a pawn and compensation.} 20. Ng4 Nf4 ({
From a practical point of view the best was} 20... Kb8 $1 21. Be3 Qe7 {and
then Black can prepare and carry out the f7-f5 advance at the right moment.})
21. Be3 Rde8 $6 {I was uncertain about 21...f5, but the move in the text is
just a waste of time.} (21... f5 22. exf5 (22. Bxf4 exf4 23. Ne5 h3 24. Ra2 Rh7
25. exf5 Bxf5 $17) 22... gxf5 23. Bxf4 exf4 24. Ne5 h3 25. Ra2 Rh7 26. Kh1 {
I was calculating this and thought that White is getting some counterplay. My
knight is stuck on a5, and in the heat of the battle on the opposite flank
this could become apparent. An engine evaluates this position as clearly
better for Black, so I guess I was missing something...}) 22. Ra2 $1 Qe7 ({Here
} 22... f5 $6 {would be worse than on the previous move as White can quickly
double the rooks along the e-file.} 23. Bxf4 exf4 24. Ba6+ Kb8 25. exf5 Qxf5
26. Rae2 $13) 23. Bxf4 exf4 24. e5 c4 25. Be4 $1 {The position has become
double-edged, even if objectively Black is still better.} Qc5+ ({The central
pawn is taboo:} 25... Bxg4 26. fxg4 Qxe5 $4 27. Bf5+ $16 {[%csl Re5]}) 26. Kh1
Nb3 $6 {It was useful to insert h4-h3 first, harassing the shelter of White's
monarch.} (26... h3 $1 27. gxh3 Nb3 28. Qe2 Re7 29. e6 fxe6 30. Bxg6 Qxd5 31.
Ne5 Bc6 $17) 27. h3 Qa5 $6 {Somewhere here we entered into a phase of mutual
time trouble. The quality of moves decreases accordingly.} (27... Re7 $1 $17)
28. d6 c6 $6 (28... Be6 29. Nf6 Rd8 $17) 29. Qe2 (29. Nf6 {Here are a couple
of spectacular lines from the "Houdini" kitchen which show that Black's
position has become pretty dangerous.} Rxe5 30. Rae2 Re6 $1 (30... Qxc3 $6 31.
Bxc6 $1 Bxc6 32. Rxe5 Rd8 33. d7+ Kb7 34. Qd6 Bxf3 $1 35. Rg1 $1 Nd4 36. Re8
Nf5 37. Qxf4 Bc6 38. Ne4 $1 Bxe4 39. Qxe4+ Kc7 40. Qf4+ Kxd7 41. Rxd8+ Kxd8 42.
Rc1 $16) 31. Bxc6 $1 Bxc6 32. Rxe6 fxe6 33. d7+ Kc7 34. Rxe6 Qc5 35. Ne8+ Kd8
36. Nf6 Kc7 $11) 29... Nc5 30. Nf6 Qxc3 (30... Rxe5 31. Nxd7 Nxd7 32. Qxc4 Qc5
33. Qxf7 Qxd6 34. Qxf4 g5 $13) 31. Nxd7 Kxd7 32. Rc2 Qxe5 33. Qxc4 Qf6 34. a4
$2 ({I saw the following forced draw during the game:} 34. Bxc6+ $1 Kxc6 35.
Rxe8 Rxe8 36. Qa4+ b5 37. Qa6+ Kd5 38. Rd2+ Kc4 39. Rc2+ Kd5 $11) 34... Re6 35.
a5 Rb8 $2 (35... Rxd6 36. axb6 axb6 37. Ra2 Rb8 38. Ra7+ Rb7 39. Qa2 Kc7 40.
Rb1 Qe6 41. Qa3 Nxe4 42. Qa6 (42. Rxb6 Rd1+ 43. Kh2 Rxa7 44. Qxa7+ Kd6 45. fxe4
f3) 42... Rxa7 43. Qxb6+ Kd7 44. Qxa7+ Ke8 {In both cases Black's king escapes.
Of course, these lines are impossible to calculate in time trouble, only
intuition could help...}) 36. axb6 axb6 37. Qb4 Nxe4 38. fxe4 Qe5 39. Rd1 Qxe4
$2 {This is the losing move! You don't believe it? At first I didn't believe
it myself!} (39... f3 $1 40. gxf3 Qg3 41. Qa3 Ra8 $1 42. Qxa8 Qxf3+ 43. Kh2
Qg3+ $11) 40. Rc4 c5 41. Qb3 Qc6 (41... Qb7 42. Rxf4 Rf8 43. Qa2 {[%cal Gf4a4]}
b5 44. Qf2 {[%csl Rc5,Rf7]} f5 45. Qxc5 Re2 46. Rf2 Rxf2 47. Qxf2 $18 {[%csl
Rd7]}) 42. Rxf4 Rf8 43. Ra4 Rb8 {The more I looked at my position, the less I
liked it. I have some extra pawns, but my king is unsafe and threats are
coming from both sides.} (43... Re2 44. Ra7+ Kd8 45. Qd5 Re1+ 46. Kh2 Qxd5 47.
Rxd5 $18 {[%cal Ga7a8]}) 44. Rf4 {Luckily, my opponent didn't suspect anything
and continued to repeat moves.} (44. Qa2 $1 Rb7 (44... Ke8 45. Rxh4 $18) 45.
Rf4 Kd8 46. Rxf7 Rxf7 47. Qxe6 Qd7 48. Qe4 Qb7 49. Qxg6 $18) (44. Qc4 {Less
accurate than 44.Qa2, but also wins.} b5 45. Qf4 f6 (45... bxa4 46. Qxf7+ Kc8
47. Qxe6+ Qd7 48. Qg8+ Qd8 49. Qd5 $18) 46. Ra7+ Rb7 47. Ra8 Qe4 48. Qh6 Rxd6
49. Rd8+ $1 Kxd8 50. Qf8+ Qe8 51. Qxd6+ Kc8 52. Ra1 Rb8 53. Qxc5+ $18) 44...
Rf8 45. Ra4 Rb8 46. Rf4 {Here a draw was agreed as a threefold repetition
follows anyway. As you can see from the analysis, both players have grounds to
feel disappointed.} 1/2-1/2

[Event "RUS-Cup03 Geller Memorial"]
[Site "Moscow"]
[Date "1999.02.07"]
[Round "6"]
[White "Kozlov, Vladimir N"]
[Black "Yemelin, Vasily"]
[Result "0-1"]
[ECO "E24"]
[WhiteElo "2327"]
[BlackElo "2550"]
[Annotator "Tisdall,J"]
[PlyCount "68"]
[EventDate "1999.02.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "CBM 070"]
[Source "ChessBase"]
[SourceDate "1999.06.08"]
[SourceVersion "1"]
[SourceVersionDate "1999.06.08"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 d6 6. f3 Nfd7 {An extremely
interesting old line that deserves much more testing from black. He sets up
the thematic assault on the white c4 pawn while not allowing Bg5, and not
committing to castling too early. This allows for a nice non-theoretical and
strategically clear-cut approach to the variation.} 7. e4 Nc6 8. f4 b6 (8...
Qh4+ 9. g3 Qe7 10. Nf3 b6 11. Bd3 Ba6 (11... Na5 12. O-O Ba6 13. e5 Bxc4 14. f5
Bxd3 15. Qxd3 dxe5 16. fxe6 Qxe6 17. Ng5 Qg6 18. Qxg6 fxg6 19. Ne6 Ke7 20. Nxc7
Raf8 21. Bg5+ Kd6 22. Nb5+ Kd5 23. Rfd1 $13 {1/2-1/2 Gutman,L-Taimanov,M/Baku
1977/MCL (48)}) 12. Be3 Na5 13. Qe2 f5 14. e5 O-O 15. O-O c5 16. Nd2 Rac8 17.
Rfc1 Kh8 18. h3 Bb7 19. Kh2 cxd4 20. cxd4 d5 $36 {0-1 Van der Sterren,
P-Ligterink,G/Amstredam 1980/EXT 98 (53)}) 9. Nf3 Ba6 10. Ra2 Na5 11. Rf2 $6 (
11. Qa4 {to defend the c-pawn for a little while deserved a look.}) 11... Bxc4
$17 12. Bxc4 Nxc4 13. O-O O-O 14. Ng5 h6 15. Qh5 Qe8 (15... hxg5 16. fxg5 Qe8 {
was not out of the question since} 17. Rf3 f5 {is possible due to} 18. g6 Nf6 {
. Black's way is very practical as he has a pawn and a solid position and has
no need to expose his king.}) 16. Qe2 b5 17. Nf3 f5 18. e5 dxe5 $6 (18... Ndb6
{looks more solid, not activating white's bishop.}) 19. fxe5 Ndb6 20. Nh4 Nd5
21. g4 f4 (21... Nxc3 22. Qf3 Ne4 23. Rg2 (23. gxf5 Nxf2 24. Rxf2 exf5) 23...
Qd8 24. gxf5 Qxd4+ 25. Kh1 Nxe5 {and materialism really should triumph, but
black prefers to keep things quieter.}) 22. Qd3 g5 23. Ng6 Rf7 24. h4 Rg7 25.
h5 a5 26. a4 Qc6 27. axb5 Qxb5 28. Qe4 Rb8 $19 {It is clear that white just
faces the promotion of the a-pawn unless desperate measures are taken.} 29.
Bxf4 gxf4 30. Nxf4 Nce3 31. Nxe6 (31. Nxd5 $5 Nxd5 $1 (31... Rxg4+ $2 32. Qxg4+
Nxg4 33. Ne7+ {and white draws with a rather unusual perpetual.})) 31... Qxf1+
$1 (31... Rxg4+ 32. Qxg4+ Nxg4 33. Rf8+ Rxf8 34. Rxf8+ Kh7 35. Rf7+ $11) 32.
Rxf1 Rxg4+ 33. Qxg4+ Nxg4 34. Rf3 Nde3 0-1

[Event "New York op"]
[Site "New York"]
[Date "1998.03.20"]
[Round "7"]
[White "Sagalchik, Gennadij"]
[Black "Akopian, Vladimir Eduardovic"]
[Result "0-1"]
[ECO "E24"]
[WhiteElo "2550"]
[BlackElo "2660"]
[Annotator "Tisdall,J"]
[PlyCount "72"]
[EventDate "1998.03.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 064"]
[Source "ChessBase"]
[SourceDate "1998.06.02"]
[SourceVersion "1"]
[SourceVersionDate "1998.06.02"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. e3 O-O 8. Bd3
Qc7 9. Qb3 {A rather artificial novelty, which sees white going into odd
contortions trying to keep his queenside weaknesses under control.} (9. Qc2
dxc4 10. Bxc4 b6 11. Bd2 cxd4 12. cxd4 Ba6 13. Rc1 Bxc4 14. Qxc4 Qxc4 15. Rxc4
Nbd7 16. Ne2 Rfc8 17. Rxc8+ Rxc8 18. Nc3 e5 19. Ke2 exd4 20. exd4 Nf8 21. Kd3
Ne6 22. Rb1 Nc7 23. a4 Kf8 24. Nb5 Ncd5 25. Nd6 Rd8 26. Nc4 Nc7 27. Bb4+ Kg8
28. Be7 Rd7 29. Bxf6 gxf6 30. Ne3 Ne6 31. Nf5 Nc5+ 32. Kc4 Nxa4 33. Kb4 b5 {
Berntsen,S-Edzgveradze,N/WchJW-U20 1994/EXT 94ch2/1/2-1/2 (51)}) 9... b6 10.
cxd5 exd5 11. Qb1 Ba6 12. Bxa6 Nxa6 13. Ne2 cxd4 14. cxd4 Qc4 15. Ra2 Rac8 16.
O-O Nc7 (16... Rc6 $5 {to triple on the c-line looks more promising.}) 17. a4
Rfe8 18. Ng3 g6 19. Bd2 {White has carefully unravelled his pieces from what
looked like a worried defensive huddle, and now has prospects for a slight
advantage, thanks to his bishop and more flexible pawn structure.} Ne6 20. a5
bxa5 21. Rc1 (21. Rxa5 Qc2 22. Bb4 Qxb1 23. Rxb1 Nd8 24. Bd2 Rc2 25. Nf1 Nc6 {
promises white nothing.}) 21... Qa6 22. Rxa5 (22. Rxc8 $5) 22... Rxc1+ 23. Qxc1
Qb6 24. Qa1 {Now the weak a and d-pawns should cause black some headaches.} Re7
25. Ne2 Rb7 26. Nc3 Qc7 $1 {The beginning of an elegant regrouping that
creates serious counterplay.} 27. Qa2 (27. Nxd5 Nxd5 28. Rxd5 Qc2 29. Qc3 Qd1+
(29... Rb1+ 30. Kf2 $16) 30. Be1 (30. Kf2 Rc7 $1) 30... Rb2 $1 31. Z0 $140 Qe2)
27... Qb8 28. Be1 $6 {The tension continues to increase while doubtless the
clocks begin to run short of time. The capture on d5 must be considered here:}
(28. Nxd5 $5 Nxd5 29. Qxd5 (29. Rxd5 Rb1+ 30. Kf2 Rb2 31. Qa5 Qb3 $1 $40) 29...
Rb1+ 30. Kf2 Qxh2 31. Rxa7 {and white's king is safer than black's:} Qh4+ (
31... Rb2 32. Ra2) 32. Ke2 Qg3 (32... Qh1 33. Ra8+ Nf8 (33... Kg7 34. Qe5+ Kh6
35. e4+ g5 36. Bxg5+ $1 Nxg5 37. Ra6+ $18) 34. Kd3 (34. Kf2 Qh4+ $11) 34...
Qf1+ (34... Qxg2 35. Qd6) 35. Ke4 {and black is on the ropes.}) 33. Ra8+ Kg7
34. Qe5+ Qxe5 35. dxe5 $16) 28... Rb2 29. Qa4 (29. Qa3 $5) 29... Ng5 $1 30. f4
(30. Qd1 $5 {looks better than conceding the e4 square but the game is
becoming ferociously complicated and time doubtless running low.} Nh3+ {
seems to be repulsed by} 31. Kh1 Rf2 32. Bd2 (32. Qd3 Qb2 $40)) 30... Ng4 31.
Rb5 $2 {[#]} (31. Rxa7 Rxg2+ $3 32. Kxg2 Qb2+ 33. Kg3 Qxh2+ 34. Kxg4 Qg2+ 35.
Kh4 Nf3#) (31. Nd1 $5 Rb1 (31... Re2 32. Bb4 $1 Ne4 (32... Nxe3 33. Nxe3 Qxf4
34. Qe8+ Kg7 35. Bf8+) 33. Rxa7 Nd2 (33... Ra2 34. Qxa2 Qxb4 35. Qe2) 34. Bxd2
Rxd2 35. Ra8 Rxd1+ 36. Qxd1 Qxa8 37. Qxg4 $16) 32. Rxa7 Rxd1 33. Qxd1 Qxa7 34.
Qxg4 Qa1 $44) 31... Rxg2+ $3 32. Kxg2 Nxe3+ 33. Kg3 $2 (33. Kf2 $1 Qxf4+ 34.
Ke2 Ng2 $1 {[%csl Ge1,Ge3,Gf3]} (34... Nc4 $2 {[%csl Gf3]} 35. Kd1 (35. Kd3 $2
Qf5+ $1) 35... Qxd4+ 36. Kc2 Nf3 37. Rb8+ Kg7 38. Qe8) 35. Bg3 (35. Bf2 Qf3+
36. Kf1 Nf4 $19 {[%csl Rc3,Rd3,Rf2,Rg2,Rh1]}) (35. Nxd5 Qe4+ 36. Kf1 Qd3+ 37.
Kg1 $8 Nxe1 $19) (35. Kd1 Qf3+ 36. Kc1 Nxe1 37. Nxd5 Nd3+ $17 {->}) 35... Qe3+
36. Kf1 Qf3+ 37. Bf2 Nf4 $19) 33... Nf1+ $1 34. Kg2 (34. Kf2 Qxf4+ 35. Kg1 Nh3+
36. Kg2 Ne3+) (34. Kg4 Qc8+ 35. Kxg5 Qf5+ 36. Kh4 Qh5#) 34... Qxf4 35. Bf2 Ne3+
$1 36. Bxe3 Qf3+ (36... Qf3+ 37. Kg1 Nh3#) 0-1

