[Event "Zurich"] [Site "?"] [Round "0"] [White "Spassky"] [Black "Seirawan"] [Result "1-0"] [ECO "B08"] [Opening "Pirc: Classical, 5.h3"] 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. h3 O-O 6. Be3 a6 { White's slow development lets Black go for counterplay on the wings.} 7. a4 b6 {Black takes aim at White's center, but this move is risky. With the bishop off the c8-h3 diagonal White can often get an attack going quickly by e4-e5-e6 and jumping in with the rest of his pieces. Black should play 7...d5.} 8. Bc4 Bb7 {With White ready to jump in on e6 this is a mistake. He should try 8... Nc6, though Black's funny piece placement should let White keep the initiative. } 9. e5 Ne4 {Black hopes to trade pieces to dull White's attack, but this loses time when he can least afford it. 9...dxe5 would have been a better try, though White has a plus after 10.dxe5 Qxd1+ 11.Rxd1 due to space and Black's queenside.} 10. Nxe4 Bxe4 11. Ng5 {Black underestimated this move. White offers a pawn to get his pieces into the attack at warp speed.} 11... Bxg2 { Madness. Black simultaneously opens a line onto his own king and gives up two tempi. He would have done better to try 11...d5 or Bf5, though it's pretty bad anyway.} 12. Rg1 Bc6 {Black is probably lost after this. 12...d5 would have closed the a2-g8 diagonal. White could reopen it by 13.Bb3 Be4 14.Nxe4 dxe4 15. Qg4, but at least White would have one piece fewer to mate with.} 13. Qg4 e6 { Black finally does something about the a2-g8 diagonal, but with five pieces already aiming at his king, it's too late.} 14. O-O-O Nd7 15. h4 dxe5 16. dxe5 Qe7 {Black hopes to get his knight to f6 to defend his king, but...} 17. Rxd7 { Spassky nixes that idea with this fine sac. White now has all his pieces trained on Black's king, while Black's queen, queen bishop and queen rook aren't playing.} 17... Bxd7 18. h5 f5 {Getting the queen in, but exposing e6.} 19. Qh3 f4 {Trying to keep White's bishop out, but now e6 is terminal.} 20. hxg6 Bxe5 {Opening the g-file looks suicidal, but it doesn't matter anymore. After, e.g. 20...h6 21.Bd2 White adds the possibility of Nf7-h6+ to his bag of threats.} 21. Nxe6 Bxe6 22. Bxe6+ Kg7 23. gxh7+ 1-0