1. d4 e6 2. Nf3 c5 3. e3 Nf6 4. Bd3 b6 5. O-O Bb7 6. Nbd2 cxd4 7. exd4 Be7 8. Re1 O-O 9. c3 d6 10. Qe2 Re8 11. Nf1 Nbd7 12. Ng3 Bf8 13. Bg5 h6?! 14. Bd2 Qc7 15. Bc2

Makes e6-e5 less dangerous and prepares the cannon 16. Qd3 etc.

15... Bd5 16. b3 Qb7

"Fasten seatbelts, and no smoking" as Hoi wrote in his comments.

17. Nh4!

Provokes a black advance on the king's side.

17... b5 18. Qd3

Now black must prevent 19. Nh5 followed by 20. Re3 and 21. Rg3 with a strong attack.

18... g5 19. Nf3 Bxf3?

Better 19... Bg7

20. gxf3 Bg7 21. h4! gxh4 22. Ne4 Qc6 23. Kh1 Nh5

Threatens to win a piece with 24... f5 To continue the attack white must sacrifice.

24. Rg1! Kf8

Even if it looks very dangerous black should have played 24... f5 25. Bxh6 fxe4 26. Qe3! Re7! with a very messy position. After Kf8 it seems to be a forced win.

25. Rxg7! Kxg7

25... Nxg7 26. Bxh6

26. Bxh6+!

26. Rg1+ Kf8 27. Bxh6+ Ke7 is unclear.

26... Kxh6 27. Rg1!

Blocks the escape route.

27... f5

27... Nf4 28. Ng5!! f5 29. Qe3 e5 30. Nf7+ Kh7 31. Bxf5+

28. Qe3+ f4

28... Kh7 29. Qg5

29. Nxd6!! Qxd6

29... Ng3+ 30. Rxg3 fxe3 31. Nf7+ Kh5 32. Rg5#

30. Qd3 Nf8?

30... Ng3+! 31. Rxg3 Nf8 32. Rg6+ Kh5 33. Rf6 Qe7 34. Rxf8 Qg7 35. Rxf4 Rf8 36. Rg4 Qf7 37. Kg2 and white wins due to the exposed black king.

31. Qh7+!!

Comments based on Carsten Hoi's in Skakbladet 1988.

1-0