[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "4"]
[White "Spassky, Boris Vasilievich"]
[Black "Szabo, Laszlo"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ba6 6. Ng3 Bxc3+ 7. bxc3 d5 8. Ba3 Bxc4 9. Bxc4 dxc4 10. Qa4+ Qd7 11. Qxc4 Qc6 12. Qxc6+ Nxc6 13. c4 Na5 14. Rc1 Rc8 15. e4 c5 16. d5 O-O 17. O-O exd5 18. cxd5 Rfe8 19. Rfe1 Nd7 20. f4 b5 21. Nf5 Nb7 22. e5 g6 23. Ne3 c4 24. Ng4 Kg7 25. Bb2 Kf8 26. Ba3+ Kg7 27. Bb2 Kf8 28. Ba3+ Kg7 1/2-1/2