[Event "IBM"]
[Site "Amsterdam"]
[Date "1968.??.??"]
[Round "12"]
[White "Zuidema, Coen"]
[Black "Kotov, Alexander"]
[Result "0-1"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. f4 a6 5. Nf3 b5 6. Be3 Bb7 7. Bd3 Nd7 8. a4 b4 9. Nb1 c5 10. c3 Ngf6 11. Nbd2 bxc3 12. bxc3 O-O 13. Rb1 Rb8 14. O-O Ng4 15. Nc4 d5 16. exd5 Bxd5 17. Qe2 Rxb1 18. Rxb1 Nxe3 19. Nxe3 Bxf3 20. Qxf3 cxd4 21. cxd4 Bxd4 22. Kh1 Nc5 23. Bc4 Qa5 24. Ng4 Bg7 25. Qc6 Rd8 26. h3 e6 27. Rf1 Qb4 28. Bxa6 Ne4 29. Rf3 Nd2 30. Qc7 Rf8 31. Rd3 Qb1+ 32. Kh2 Nf1+ 33. Kg1 Ng3+ 34. Kf2 Ne4+ 35. Kf3 Qf1+ 36. Kxe4 Qe2+ 0-1