[Event "October Revolution 50years"]
[Site "Moscow"]
[Date "1967.05.21"]
[Round "1"]
[White "Portisch, Lajos"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 8. Nf3 h6 9. Bh4 exd5 10. cxd5 g5 11. Bg3 Nh5 12. Nd2 Nxg3 13. hxg3 Nd7 14. Nc4 Qe7 15. g4 Ne5 16. Ne3 a6 17. a4 Bd7 18. a5 b5 19. axb6 Rfb8 20. Na4 Bxa4 21. Rxa4 Rxb6 22. Nf5 Qf6 23. b3 a5 24. O-O Rb4 25. Qa1 Qd8 26. Qa2 Rab8 27. Rb1 Rxa4 28. bxa4 Rb4 29. Rxb4 cxb4 30. Qc2 1/2-1/2