[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.18"]
[Round "5"]
[White "Tringov, Georgi Petrov"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]

1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. dxe5 Nxe5 7. Nxe5 dxe5 8. Qxd8+ Bxd8 9. Be3 c6 10. f3 Bb6 11. Bg5 Nd7 12. O-O-O f6 13. Bd2 Nc5 14. b4 Ne6 15. b5 Ba5 16. bxc6 bxc6 17. Na4 Bxd2+ 18. Rxd2 Ke7 19. Rhd1 Rd8 20. Bxe6 Rxd2 21. Rxd2 Bxe6 22. Nc5 Rb8 23. Rd3 Rb5 24. Nxe6 Kxe6 25. Rd8 Rb7 1/2-1/2