[Event "Eurotel Trophy"]
[Site "Prague CZE"]
[Date "2002.05.04"]
[Round "5.1"]
[White "Anand, Viswanathan"]
[Black "Karpov, Anatoly"]
[Result "1-0"]
[Annotator "Hathaway, Mark"]
[BlackElo "2690"]
[ECO "C42"]
[EventDate "2002.04.28"]
[WhiteElo "2752"]

1. e4 e5 2. Nf3 Nf6 { Petrov's Defense } 3. Nxe5 ( 3. d4 ) 3... d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 { There are at least five good moves on Black's sixth turn. This is the most common these days. It controls square e5 and perhaps prepares ...Bc8-g4 and in some cases aims at Bd3 (via ...Nb4) to fight for control of light squares. } 7. O-O Be7 { By closing the e-file Black makes it easier to support Ne4, so White has to do more to undermine it. } ( 7... Bg4 8. Re1 f5 9. c3 ) 8. c4 Nb4 9. Be2 O-O { The center appears to be opening quickly, so it's only safe to move the king away from the e-file. Neither White nor Black was threatening anything significant just yet, so this was a good moment to ensure the king's safety. } 10. Nc3 { Now White threatens 11. cxd5 which forces Ne4 to be exchanged by 11...Nxc3 12. bxc3. Then Nb4 would be threatened and c3-c4 to secure Pd5 requires 12...Nxd5. Nd5 is less appealing than Qd5 or to have an empty square. All this forces Black to resecure Ne4 or to retreat it: both have been tried. } 10... Bf5 { After this Black might retreat ...Ne4-f6 and play ...Nb4-c2 to gain a quick draw by repetition by threatening White's Ra1. White has to do more to challenge the light squares, so cxd5 or a2-a3 are candidate moves. } 11. a3 ( 11. cxd5 Nxd5 ( 11... Nxc3 $6 12. bxc3 Nxd5 ( 12... Nc2 $2 13. Rb1 Ne3 14. Bxe3 Bxb1 15. Qxb1 ) 13. Qb3 ) ( 11... Nf6 $1 12. Bg5 Nfxd5 13. Bxe7 Qxe7 { and Black's Nb4 refuses to budge until chased! } ) 12. Qb3 ) 11... Nxc3 12. bxc3 Nc6 { This is the best retreat White could force. Pd4 opposes Nc6, restraining it. } 13. Re1 ( 13. cxd5 { has been played, even recently, but seems to give Black less trouble since it assists him to develop Qd8xd5, clearing the back rank for the rooks } ) ( 13. c5 { leaves Black with better central control of light squares while attempting to threaten Black's queen-side, Pb7 in particular } ) ( 13. Bf4 dxc4 14. Bxc4 Na5 15. Ba2 ( 15. Be2 ) 15... c5 { and the only weak points on the board of any significance are in White's camp (Pa3, Pd4) . } ( 15... Bxa3 $2 16. Qa4 ) ) 13... Re8 14. Bf4 dxc4 { Black's need to maneuver pieces forces him to allow White's bishop onto the a2-g8 diagonal, controlling d5! } 15. Bxc4 Bd6 ( 15... Na5 16. Ba2 ) 16. Rxe8+ Qxe8 17. Ng5 { In this direct attack on Pf7 White also controls e4 and fights for control of light squares everywhere. } ( { Not as good is the immediate } 17. Bxd6 cxd6 18. Ng5 Nd8 { and the open c-file still allows Ra8 to become active } ) 17... Bg6 18. Bxd6 cxd6 19. h4 Qe7 { Karpov has always been a great defender and here he uses his queen rather than weaken his king's position with a pawn move. } ( 19... h6 $2 20. h5 Bxh5 ( 20... hxg5 $4 21. hxg6 Nd8 22. Qh5 ) 21. Qxh5 hxg5 22. Kh2 $13 { preparing Ra1-e1 might give White a continuing advantage } ) 20. Qg4 { over-protecting Ng5 to renew the threat of h4-h5xg6 } 20... h6 21. Nh3 { The knight had to retreat, but keep your eyes open, there's a new threat: Qxg6! } ( 21. Nf3 { is also playable, but doesn't seem to directly lead to anything advantageous } ) 21... Qf6 ( 21... Qe4 22. Nf4 Bf5 23. Qg3 ( 23. Bd3 Bxg4 24. Bxe4 ) 23... Ne7 24. Bd3 Qc6 ) 22. Re1 Bf5 23. Qf3 Kf8 24. Nf4 Bd7 ( 24... Qxh4 $2 { The pawn is somewhat poison: } 25. Bxf7 Qg4 ( 25... Kxf7 $4 26. Qd5+ Kf6 ( 26... Kf8 27. Qxf5+ $18 ) 27. Re6+ Bxe6 28. Qxe6+ Kg5 29. Nh3+ Kh5 30. Qf5+ g5 31. Qf7+ Kg4 32. Qf3# ) 26. Qxg4 Bxg4 27. Bd5 { and the threat of Nf4-g6# is very strong } ) 25. g3 { White controls the light squares fairly well, but he hasn't been able to make any severe dents in Black's position. By defending both Nf4 & Ph4 he's probably preparing to move Qf3, though I'm not sure where he would need it most, perhaps Qf3-d5-b5. } 25... Re8 26. Rxe8+ Bxe8 ( 26... Kxe8 27. Qe4+ Kf8 28. Qh7 Ne7 { is still very much a fight and one requiring great precision from both players } ) 27. Qe4 g5 ( 27... Bd7 28. Qh7 Ne7 { is a transposition to the previous note } ) 28. hxg5 Qxg5 ( 28... hxg5 ) 29. Bd5 Bd7 30. Qh7 Qf6 $4 ( 30... Qg7 $2 31. Qb1 { This dramatic change of direction can't be defended by Black. } 31... b6 32. Qb5 Qg5 33. Qa4 a5 34. Bxc6 b5 35. Qxa5 Bxc6 36. Qc7 $18 ) ( 30... Be8 { is advantageous for White, but there's no immediate knockout } ) 31. Bxf7 $1 { This is the surprising impossible move which can in fact be played. } 31... Ne7 32. Bb3 ( 32. Ng6+ Nxg6 33. Bxg6 Qg7 $16 ) 32... Bf5 33. Nh5 Bxh7 34. Nxf6 Bg6 { So, they play an endgame with Anand having an extra pawn. } 35. Ng4 Kg7 36. Ne3 { Ne3 opposes Ne7 and creates a neat perimeter from the a-file to the h-file. } 36... Be4 37. g4 Kf6 38. Kh2 b6 39. Kg3 Kg5 40. Bf7 { preparing Ne3-c4 to threaten Pd6 } 40... Kf6 41. Bc4 Kg5 42. Bb3 Kf6 43. f3 Bg6 44. f4 Be4 45. Bc4 { White clearly isn't in any hurry and is thinking through his options. } 45... Bc6 46. Bd3 Bb7 ( 46... b5 $6 47. c4 bxc4 48. Nxc4 Ke6 49. f5+ $18 ) 47. Kh4 Bf3 48. Nc4 Nd5 ( { Worth a try was } 48... Nc8 49. Nd2 Bc6 50. Bf5 Ne7 51. Ne4+ Bxe4 52. Bxe4 ) 49. Kg3 Bd1 50. Nxd6 Nxc3 51. Nf5 Kg6 52. d5 { It's time for Black to resign. He can't touch Pd5 because of Nf5-e3+, picking up Bd1, so Pd5 will continue advancing! } 52... Ba4 53. d6 Bd7 54. Kh4 { Bd3 and Nf5 do a neat job of tying-up Nc3 and this just moves off a square where the knight might (!) have a chance to check. White is lining up all his ducks for the final breakthrough at d7. } 54... a5 55. Ne3+ Kf7 56. Kh5 ( { Continuing to try to pick off Black pawns is still a wise policy. } 56. Nc4 Nd5 57. Ne5+ Ke8 58. f5 Nf6 ( 58... b5 59. Kh5 b4 60. axb4 Nxb4 61. Be4 { Be4 dominates Nb4 to prevent it from returning to the king-side and Ne5 can stop Pa5. On the king-side White will grab Ph6 and run a pawn through to win. } ) 59. g5 hxg5+ 60. Kxg5 Nh7+ 61. Kg6 Nf8+ 62. Kg7 { and all of Black's forces are well corralled } ) 56... b5 57. Kxh6 ( { It's time for White to get rid of Bd7 to simplify this ending. } 57. Bf5 Bxf5 58. Nxf5 Ke6 59. Kxh6 b4 60. axb4 a4 61. Ne3 Kxd6 62. g5 ) 57... Ke6 58. g5 Kxd6 59. g6 1-0