[Event "FIDE World Cup 2011"]
[Site "Khanty-Mansiysk RUS"]
[Date "2011.09.14"]
[Round "6.3"]
[White "Grischuk, Alexander"]
[Black "Ivanchuk, Vassily"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2746"]
[BlackElo "2768"]
[Annotator "Müller,Karsten"]
[PlyCount "87"]
[EventDate "2011.08.28"]
[Source "Chess Today"]
[SourceDate "2011.09.14"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Be2 Nge7 7. O-O Nf5 8. dxc5
Bxc5 9. Bd3 Nfe7 10. Nbd2 Ng6 11. Nb3 Bb6 12. Re1 Qb8 13. Qe2 Bc7 14. Bxg6 hxg6
15. h4 Rh5 16. Bg5 Nxe5 17. Nxe5 Bxe5 18. Qxe5 Qxe5 19. Rxe5 f6 20. Re3 fxg5
21. hxg5 Rxg5 22. Nc5 O-O-O 23. Nxe6 Bxe6 24. Rxe6 d4 25. cxd4 Rxd4 26. Rae1
Rd7 27. g3 a6 28. R1e2 Rf7 29. Rc2+ Kd7 30. Rb6 Kd8 31. Kg2 Ra5 32. a3 g5 33.
Rd6+ Ke7 34. Rc7+ Kxd6 35. Rxf7 Rb5 36. b4 a5 37. bxa5 Ke6 38. Rxg7 Rxa5 39.
Kh3 Kf6 40. Rxb7 Rxa3 41. Kg4 Ra4+ 42. Kh5 g4 $2 {Ivanchuk exposes his g-pawn.}
({The active} 42... Ra2 $1 {saves the day, e.g.} 43. Rb6+ Kf7 (43... Kg7 $5 {
is even easier, e.g.} 44. f3 Ra3 45. Rb7+ (45. Kg4 Ra5 $11) 45... Kf6 46. Rb8
Kg7 47. Kg4 Ra5 48. Rb6 Rc5 49. Kh5 Rc3 $11) 44. f3 (44. Kxg5 Rxf2 45. Rb7+ Kg8
46. Kg6 Rf8 $1 $11 {Against a g-pawn passive defence is sufficient.} ({But not
} 46... Kf8 $2 47. g4 Ra2 48. Rb8+ Ke7 49. g5 Rg2 50. Rg8 $1 $18 {[%cal Gg6h7]}
)) 44... Ra3 45. Kg4 Ra5 $1 (45... Rc3 $2 46. Rb5 Kf6 47. Rf5+ Kg6 48. Rxg5+
$18) 46. Rh6 {and now Black has two drawing options:} Ra3 (46... Re5 47. Rh5
Kf6 48. f4 gxf4 49. Rxe5 Kxe5 50. gxf4+ Kf6 $11) (46... Kg7 $2 47. Rh5 Kg6 48.
f4 $18) 47. Rh5 Kf6 48. Rxg5 Rxf3 49. Kxf3 Kxg5 $11) 43. Rb6+ $1 {The sting of
the scorpion.} (43. Rb5 $2 Ra2 $11) 43... Kf5 (43... Kf7 44. Kg5 Ra2 45. Rf6+
Kg7 46. Rf4 $18) (43... Kg7 44. Rg6+ $18) (43... Ke7 44. Kg5 Ra2 45. Rf6 $18)
44. Rb8 {[%cal Gb8f8,Gf8f4]} (44. Rb8 Kf6 (44... Rc4 45. Rf8+ Ke5 46. Kg5 Ra4
47. Rf4 $18) 45. Rf8+ Ke5 (45... Kg7 46. Rf4 $18) 46. Kg5 Rb4 47. Rf5+ Ke6 48.
Rf4 $18) 1-0

