[Event "October Revolution 50"]
[Round "1"]
[Site "Moscow"]
[Date "1967.05.21"]
[White "Portisch, Lajos"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[ECO "E75"]
[Opening "King's Indian, Averbakh, Main line"]
 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