[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.14"]
[Round "1"]
[White "Hartoch, Robert G"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]

1. c4 Nf6 2. g3 c6 3. b3 d5 4. Bb2 Bf5 5. Nf3 h6 6. Bg2 e6 7. O-O Nbd7 8. d3 Be7 9. Nbd2 O-O 10. Qc2 Bh7 11. a3 a5 12. Bc3 Qb8 13. Qb2 Bd6 14. Bxf6 Nxf6 15. b4 e5 16. c5 Bc7 17. Ne1 e4 18. Nb3 axb4 19. axb4 Rxa1 20. Qxa1 h5 21. Qc1 Re8 22. dxe4 dxe4 23. Nc2 Nd5 24. Ne3 Nxb4 25. Qc4 Na6 26. Rd1 Qc8 27. h4 Kf8 28. Kh2 Qe6 29. Bh3 Qxc4 30. Nxc4 f6 31. Nd6 Rd8 32. Nd4 Bg8 33. Nxb7 Rb8 34. Ra1 Be5 35. Rxa6 Bxd4 36. e3 1/2-1/2