[Event "Moscow"] [Site "?"] [Round "0"] [White "Vaiser"] [Black "Kasparov"] [Result "0-1"] [ECO "E70"] [Opening "King's Indian: 4.e4 d6"] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 {The Four Pawn's Attack, once thought to be the refutation of the King's Indian Defense. A sharp and little investigated position arises which promises a tense struggle.} 5... O-O 6. Nf3 c5 7. d5 e6 {Vaiser stated after the game that this variation had served him well for the past 14 years.} 8. Be2 exd5 {Three years previous to this game Vaiser and I had played a blitz match. Every time I played Black we reached this position and Vaiser continued with 9.cxd5. However, I was in for an unpleasant surprise.} 9. e5 {The exclamation mark is based on psychological considerations. My opponent knew that of the three principal continuations, 9. exd5, 9.cxd5, and 9.e5, the third would come as the greatest surprise. Now I was improvising.} 9... Ng4 10. cxd5 dxe5 11. h3 e4 12. hxg4 {Before this game was played theory had ignored this move with 12.Nxe4 being preferred.} 12... exf3 13. gxf3 {Black's chief problem is his lack of useful squares for the development of his pieces on the queenside. Perhaps my experience at the board influences my pessimistic evaluation, today I would prefer to play White's position.} 13... Re8 {If I tried to prevent the advance f4-f5 by 13...f5, then the a2-g8 diagonal would be weakened, and that could prove the road to Black's destruction in the near future.} 14. f5 {Played with the idea of developing the dark squared bishop to h6 where it will disturb the only defender of the Black king, which is also Black's only active piece.} 14... Qb6 {14...gxf5 15. Bh6 Bxh6 16.Rxh6 Qg5 17.Qd2 Qxd2+ 18.Kxd2 fxg4 19.Ne4 Nd7 20.Rah1 With a winning initiative for White on the h-file.} 15. Bh6 {White pays no attention to the "mosquito bites" of his opponent and carries on with his general plan.} 15... Qxb2 {I recognized the danger facing the Black position, but decided to be consistent and took the pawn. Perhaps it will turn out all right...} 16. Bxg7 Kxg7 {The abundance of White's attacking possibilities is noticeable at first glance , but I comforted myself with the thought that not just any move would win.} 17. f6+ {Well here the pace picked up...White couldn't hold himself back from storming the walls of the king's fortress and sends in a single column of attack. 17.Rc1 During the game it seemed to me that this move was not sufficiently forcing. Detailed analysis, however, later showed that I was wrong.} 17... Kg8 {In this position I began to glance at the White king which has remained in the center.} 18. Qc1 {Vaiser proposes an endgame, where his opponent's lag in development and the strong pawn on f6 would be factors operating in White's favor. But has he got a surprise coming!} 18... Qb4 { This move seems suicidal, since the entrance of the White queen to h6 creates two deadly threats. However, I was well prepared for this.} 19. Kf1 {White shou ld have regrouped and, putting aside his ambitious thoughts, come to terms with the leveling of chances. 19.Qd2 should be preferred. 19.Qd2 Nd7 20.Rb1 Qd4 21.Qxd4 cxd4 22.Ne4 d3 23.Bxd3 Nxf6 24.Kf2 Nxd5 25.Rb5 is good for White due to the weak f6 square.} 19... Nd7 20. Bb5 {This move looks pretty convincing-there seems no way to keep the White queen from reaching the coveted h6 square. 20.Qh6 Nxf6 when Black's king is safe.} 20... Qd4 21. Kg2 { 21.Qh6 Nxf6 22.Bxe8 Qxc3 23.Kg2 Bxg4 24.Bxf7+ Kxf7 25.fxg4 Re8 when White's can do nothing against the united strengthofBlack's} 21... Re3 {This move is much stronger than the "greedy" 21...Qxf6, which would give White considerable counterplay. 21...Qxf6 22.Qh6 Qg7 23.Ne4 when Black has problems developing his queenside due to the pinned knight.} 22. Ne2 Qe5 23. Kf2 Rxe2+ 24. Bxe2 Nxf6 {Now one can sum up the results of White's "blitzkrieg". His attack has been exhausted, and the extra exchange hardly carries any importance. Black has two pawns for it, and the open position of White's king allow favorable tactics.} 25. Qxc5 {In avoiding the worst, White heads for an endgame, but Black manages to win another pawn, after his advantage is beyond doubt. It should be noted that we were both in time trouble at this point.} 25... Bxg4 26. Qe3 {26.fxg4 allows Black to win White's queen.} 26... Qxe3+ 27. Kxe3 Nxd5+ 28. Kf2 Be6 29. Rab1 { This position is superior for Black, as he has three pawns for the exchange.} 29... b6 30. Rbc1 Nf4 31. a3 Nxe2 32. Kxe2 b5 33. Rc7 a5 34. Rb1 Bc4+ 35. Kf2 a4 {Such an antipositional pawn structure is justified, since supported by the pawn the bishop is no less strong than the rook.} 36. Re1 Rd8 37. Re3 Rd2+ 38. Kg3 Kg7 39. f4 Rb2 40. Rc5 h5 {Here the game was adjourned, but White, having sealed 41.Kh4, resigned before resumption. One could argue with this, but Black does have a clear path to victory. For example (see variation). 40...h5 41.Kh4 Rb3 42.Rg3 Rb1 43.Re3 Rg1 44.Rg5 Rh1+ 45.Kg3 f5 cutting off the rook from the queenside.} 41. Kh4 0-1