[Event "Zuerich"]
[Site "Zuerich"]
[Date "1961.06.04"]
[Round "7"]
[White "Keller, Dieter"]
[Black "Petrosian, Tigran V"]
[Result "0-1"]

1. e4 c6 2. c4 g6 3. Nc3 Bg7 4. d4 d6 5. Be2 Nd7 6. Nf3 e5 7. O-O Ngf6 8. Bg5 h6 9. Bh4
O-O 10. Rb1 a5 11. Qc2 exd4 12. Nxd4 Qb6 13. Rbd1 Re8 14. Kh1 Nc5 15. f3 a4 16. Bf2 Nfd7
17. f4 Qa5 18. Bf3 Nf8 19. Nde2 Be6 20. Rxd6 Bxc4 21. e5 Red8 22. Bxc5 Qxc5 23. Nxa4 Qb4
24. a3 Bb3 25. axb4 Bxc2 26. Rxd8 Rxd8 27. Nc5 Rd2 28. Nc3 Rd4 29. Rf2 Bf5 30. Nxb7 Rxf4
31. b5 cxb5 32. g3 Rd4 33. Nd6 Be6 34. Ndxb5 Rb4 35. Re2 Nd7 36. Kg2 Bc4 37. Rd2 Nxe5 38.
Nd6 Nxf3 39. Kxf3 Be6 40. Nde4 Bd4 41. Nf2 g5 42. Ke2 Kg7 43. Nfe4 Bg1 44. Kf3 g4+ 45. Kg2
Be3 46. Re2 Bc1 47. Nc5 Bc4 48. Re4 f5 49. Nd3 fxe4 50. Nxb4 e3 51. Nc2 Kf6 52. Nd1 e2 53.
Nf2 Bd5+ 54. Kg1 Be3 55. b4 h5 56. Ne1 Ke5 57. Nc2 Bc6 58. Ne1 Be4 59. b5 0-1