[Event "Piatigorsky-Cup 2nd"]
[Site "Santa Monica"]
[Date "1966.08.01"]
[Round "10"]
[White "Najdorf, Miguel"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 c5 6. O-O Be7 7. b3 cxd4 8. exd4 d5 9. Bb2 O-O 10. Qe2 Nc6 11. Nbd2 Re8 12. Rad1 Bf8 13. Bb1 Rc8 14. Ne5 dxc4 15. Nxc6 Bxc6 16. bxc4 g6 17. Bd3 Bg7 18. Nf3 Nd7 19. Rfe1 Bb7 20. Qe3 Qc7 21. Bf1 Red8 22. Ng5 Nf6 23. h3 Ne8 24. Qb3 h6 25. Nf3 Bxf3 26. Qxf3 Nd6 27. Qb3 Nf5 28. d5 exd5 29. Rxd5 Rxd5 30. cxd5 Bxb2 31. Qxb2 Qd6 32. Ba6 Rd8 33. Bc4 Rb8 34. a4 Qf4 35. Bb5 Rd8 36. Bc6 Nd4 37. Qc3 Rc8 38. a5 bxa5 39. Qxa5 Rb8 40. Qa2 Rb6 1/2-1/2