[Event "IBM"]
[Site "Amsterdam"]
[Date "1972.??.??"]
[Round "?"]
[White "Browne, Walter Shawn"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nb8 10. d4 Nbd7 11. Nh4 Nb6 12. Nd2 c5 13. dxc5 dxc5 14. Nf5 c4 15. Bc2 Be6 16. Nf3 Nfd7 17. Nxe7+ Qxe7 18. Ng5 Nc5 19. Nxe6 Qxe6 20. Be3 Nba4 21. Qg4 Qxg4 22. hxg4 Rac8 23. Rab1 Rfd8 24. Kf1 Nd3 25. Bxd3 Rxd3 26. Ke2 h6 27. Rec1 f6 28. Rc2 Kf7 29. Rd1 Rcd8 30. Rdc1 Rc8 31. Rd1 1/2-1/2