[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.08.01"]
[Round "15"]
[White "Geller, Efim P"]
[Black "Ree, Hans"]
[Result "1-0"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 c5 6. Nf3 d6 7. O-O Nc6 8. d5 Na5 9. Nd2 e5
10. e4 Ng4 11. h3 Nh6 12. b3 f5 13. exf5 gxf5 14. Bb2 b6 15. f4 Bd7 16. Qc2 Qf6 17. Ne2
Qg6 18. Nf3 e4 19. Nh4 Qf7 20. Bxg7 Qxg7 21. Qc3 a6 22. Qxg7+ Kxg7 23. Rfc1 b5 24. Nc3
Rab8 25. Nd1 bxc4 26. bxc4 Rb4 27. Bf1 Rfb8 28. Ne3 Rb2 29. Rc3 R8b6 30. Ra3 Nb7 31. Re1
a5 32. Be2 Rb1 33. Rxb1 Rxb1+ 34. Kf2 a4 35. Bd1 Rb4 36. g4 fxg4 37. hxg4 Na5 38. g5 Nf7
39. Rc3 Rb2+ 40. Rc2 a3 41. Rxb2 axb2 42. Bc2 Bc8 43. Bxe4 Ba6 44. Bb1 Kg8 45. Nhf5 Nxc4
46. Nxc4 Bxc4 47. Ne3 Ba6 48. Kf3 Kg7 49. a4 Bb7 50. Nf5+ Kf8 51. Ke4 Ba6 52. a5 Bb7 53.
Ne3 Kg7 54. Kd3 h6 55. Nf5+ Kh7 56. Kc3 1-0