[Event "IBM"]
[Site "Amsterdam"]
[Date "1972.??.??"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "Ljubojevic, Ljubomir"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 g6 4. g3 b6 5. Bg2 Bb7 6. O-O Bg7 7. b3 d5 8. cxd5 Nxd5 9. Bb2 O-O 10. Qc1 Nc6 11. Nxd5 Qxd5 12. Bxg7 Kxg7 13. Qb2+ f6 14. Rfd1 Rfb8 15. e3 e5 16. d4 exd4 17. Nxd4 Qd7 18. Bxc6 Bxc6 19. Nxc6 Qxc6 20. Rd2 1/2-1/2