[Event "Olympiad-19 Preliminaries A"]
[Site "Siegen"]
[Date "1970.09.08"]
[Round "4"]
[White "Petersen, Hans"]
[Black "Petrosian, Tigran V"]
[Result "0-1"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. a4 Nc6 8. Be3 Bd7 9. O-O
Be7 10. f4 O-O 11. g4 Nxd4 12. Bxd4 Bc6 13. Bd3 Nd7 14. Be3 Nc5 15. g5 d5 16. exd5 Bxd5
17. Nxd5 Qxd5 18. Be2 Qe4 19. Kf2 Rad8 20. Qc1 a5 21. Bf3 Qb4 22. b3 Ne4+ 23. Kg2 Nd6 24.
Bd2 Qc5 25. Be3 Qc7 26. c4 Nf5 27. Qe1 Bb4 28. Qe2 Nxe3+ 29. Qxe3 Bd2 30. Qe4 Bxf4 31.
Qxb7 Rd2+ 32. Rf2 Rxf2+ 33. Kxf2 Qc5+ 34. Kf1 Bxh2 35. Rd1 Qxg5 36. Ke1 g6 37. Rd7 Qc1+
38. Ke2 Bg3 39. Rd1 Qg5 40. Rd7 Bd6 41. Qc6 Bb4 42. Qe4 Rd8 43. Rxd8+ Qxd8 44. Qc2 Qd4 45.
Bc6 h5 46. Bg2 Bc5 47. Kf3 0-1