[Event "Piatigorsky Cup 2nd"]
[Round "4"]
[Site "Santa Monica"]
[Date "1966"]
[White "Petrosian, Tigran V"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "E74"]
[Opening "King's Indian, Averbakh, 6...c5"]
 1. d4   Nf6
 2. c4   g6
 3. Nc3  Bg7
 4. e4   d6
 5. Be2  O-O
 6. Bg5  c5
 7. d5   a6
 8. a4   Qa5
 9. Bd2  e6
10. Nf3  exd5
11. cxd5 Re8
12. O-O  Qc7
13. Qc2  Bg4
14. b3   Nbd7
15. h3   Bxf3
16. Bxf3 c4
17. b4   Re7
18. Rfe1 Rae8
19. Rac1 h6
20. a5   Qb8
21. Qb1  Kh8
22. Na4  Ne5
23. Be2  Ned7
24. Bf3  Ne5
25. Be2  Ned7
1/2-1/2