[Event "San Antonio IT"]
[Round "9"]
[Site "San Antonio"]
[Date "1972"]
[White "Petrosian, Tigran V"]
[WhiteElo "2645"]
[Black "Keres, Paul"]
[BlackElo "2600"]
[Result "1/2-1/2"]
[ECO "A17"]
[Opening "English Opening, Hedgehog Defence"]
 1. c4   Nf6
 2. Nc3  e6
 3. Nf3  c5
 4. g3   Be7
 5. Bg2  O-O
 6. d4   d5
 7. cxd5 Nxd5
 8. O-O  Nc6
 9. Nxd5 exd5
10. dxc5 Bxc5
11. Qd3  h6
12. a3   a5
13. Bd2  b6
1/2-1/2