[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.27"]
[Round "11"]
[White "Hort, Vlastimil"]
[Black "Tringov, Georgi Petrov"]
[Result "1/2-1/2"]

1. c4 c5 2. Nf3 Nc6 3. e3 e6 4. d4 d5 5. Nc3 Nf6 6. a3 cxd4 7. exd4 Be7 8. Bg5 O-O 9. Bd3 dxc4 10. Bxc4 b6 11. O-O Bb7 12. Qd3 Nd5 13. Bxd5 Bxg5 14. Be4 g6 15. d5 exd5 16. Bxd5 Bh6 17. Rad1 Na5 18. h3 Bg7 19. b4 Bxc3 20. Bxf7+ Kxf7 21. Qxc3 Qf6 22. Rd7+ Kg8 23. Qxf6 Rxf6 24. bxa5 Bxf3 25. gxf3 bxa5 1/2-1/2