[Event "IBM"]
[Site "Amsterdam"]
[Date "1967.??.??"]
[Round "6"]
[White "Zuidema, Coen"]
[Black "Pachman, Ludek"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 b4 9. d3 d6 10. Nbd2 Na5 11. Ba2 c5 12. Nc4 Nxc4 13. Bxc4 a5 14. Nd2 Nd7 15. Nf1 Bg5 16. Bxg5 Qxg5 17. Qd2 Qxd2 18. Nxd2 Nb6 19. Nf1 1/2-1/2