[Event "Piatigorsky-Cup 2nd"]
[Site "Santa Monica"]
[Date "1966.07.20"]
[Round "3"]
[White "Donner, Jan Hein"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 c6 6. e4 d6 7. Nge2 e5 8. O-O Nbd7 9. Rb1 Re8 10. h3 a6 11. b4 b5 12. cxb5 axb5 13. Be3 Bb7 14. Re1 exd4 15. Nxd4 Ne5 16. a4 bxa4 17. Nxa4 Nc4 18. Bc1 c5 19. bxc5 Bxe4 20. Rb4 Bxg2 21. Rxe8+ Nxe8 22. Kxg2 dxc5 23. Nxc5 Rc8 24. Ncb3 Qe7 25. Rb5 Ned6 26. Rc5 Qe4+ 27. Nf3 Rxc5 28. Nxc5 Qc6 29. Nb3 h6 30. Bf4 Nf5 31. Qd8+ Kh7 32. Qc7 Qd5 33. Qc5 Qe4 34. Qa7 g5 35. Nd2 Nxd2 36. Bxd2 Qd5 37. Be3 Bf6 38. Qa6 Kg7 39. Qe2 Qe4 40. Kg1 Qb1+ 41. Kh2 Qe4 1/2-1/2