[Event "San Antonio"]
[Site "San Antonio"]
[Date "1972.11.19"]
[Round "1"]
[White "Byrne, Donald"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]

1. g3 d5 2. Nf3 c6 3. Bg2 Bg4 4. b3 Nd7 5. Bb2 e6 6. O-O Ngf6 7. d3 Be7 8. c4 O-O 9. Nc3 a6 10. Rc1 Re8 11. Rc2 Bf8 12. Qa1 e5 13. cxd5 cxd5 14. Rfc1 e4 15. dxe4 dxe4 16. Nd4 Nb6 17. h3 Bd7 18. e3 Qe7 19. Nde2 Bc6 20. Nd4 Bd7 21. Nde2 Bc6 22. Nd4 Bd7 1/2-1/2