[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "5"]
[White "Ivkov, Borislav"]
[Black "Vasiukov, Evgeni"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. g3 c5 4. d5 Bg7 5. Bg2 O-O 6. Nf3 e6 7. Nc3 exd5 8. cxd5 d6 9. O-O a6 10. a4 Re8 11. Nd2 Nbd7 12. h3 Rb8 13. Nc4 Ne5 14. Na3 Ned7 15. Nc4 Ne5 16. Na3 1/2-1/2