[Event "Tilburg"] [Site "?"] [Round "0"] [White "Piket"] [Black "Kasparov"] [Result "0-1"] [ECO "A48"] [Opening "Neo-King's Indian"] 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 e5 7. O-O (7. dxe5 dxe5 8. Qxd8 Rxd8 9. Nxe5 Nxe4 10. Nxf7 Bxc3+ 11. bxc3 Kxf7) 7... Nc6 { This is the classical treatment of the King's Indian Defense. White maintains the broad center, which will eventually become closed. Then it will become a battle on both flanks.} 8. d5 Ne7 9. Ne1 {This retreat is well-established, but the alternative 9.Nd2 is also popular. In either case White needs to regroup on the kingside, and find a home for the dark-squared bishop.} 9... Nd7 10. Be3 f5 {Here we go. Black is going straight after the enemy king. If the plan does not succeed then White will have a free hand on the queenside.} 11. f3 f4 12. Bf2 g5 13. b4 {White has many other possibilities, but this is the most direct move. Still, there is much to be said for 13.Nb5.} 13... Nf6 14. c5 Ng6 15. cxd6 cxd6 {White has opened the c-file and will now occupy it.} 16. Rc1 Rf7 {This guards the critical f7-square.} 17. a4 Bf8 {A good move, because d6 will need support, and in any event the bishop is no longer very useful at g7, because it is blocked in by the pawn wedge.} 18. a5 Bd7 19. Nb5 {See how useful Bf8 turned out to be! White should perhaps have attended to the safety of the king with 19.Kh1.} 19... g4 {Black can't afford to waste any time.} 20. Nc7 g3 21. Nxa8 {Perhaps this is the decisive mistake. After 21.hxg3 the position would be very complicated, but there is no immediate win. Here is one suggested line . 21.hxg3 fxg3 22.Bxg3 Bh6 23.Nxa8 Nh5 24.Bf2 Ngf4 25.Nd3 Rg7 26.Nxf4 Bxf4 27.g4 Bxc1 28.Qxc1 Nf4 29.Qe3 h5 30.Rc1 hxg4 31.fxg4 Nxe2+} 21... Nh5 {By resisting the temptation to advance the h-pawn, I managed to keep this square free for the knight.} 22. Kh1 gxf2 23. Rxf2 Ng3+ 24. Kg1 Qxa8 25. Bc4 { Now how do I continue the attack? I need to involve my queen somehow.} 25... a6 {Aha! I can use it on the a7-g1 diagonal.} 26. Qd3 Qa7 27. b5 axb5 28. Bxb5 { Now for the kill! Do you see the move?} 28... Nh1 29. Kxh1 Qxf2 30. Rb1 Bxb5 31. Qxb5 Rc7 0-1