[Event "Piatigorsky Cup 1st"]
[Round "12"]
[Site "Los Angeles"]
[Date "1963"]
[White "Olafsson, Fridrik"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]
[ECO "E21"]
[Opening "Nimzo-Indian, Three knights variation"]
 1. d4   Nf6
 2. c4   e6
 3. Nc3  Bb4
 4. Nf3  c5
 5. e3   O-O
 6. Bd3  d5
 7. O-O  cxd4
 8. exd4 dxc4
 9. Bxc4 Nc6
10. Bg5  Be7
11. Re1  a6
12. a4   Bd7
13. Qe2  Nb4
14. Ne5  Be8
15. Rad1 Rc8
16. Bb3  Kh8
17. Qf3  Bc6
18. Qh3  Nfd5
19. Bxe7 Qxe7
20. Qg3  Nf6
21. Qh4  Bd5
22. Nxd5 Nbxd5
23. Rd3  Rc7
24. Rf3  Rd8
25. g4   g5
1/2-1/2