[Event "IBM"]
[Site "Amsterdam"]
[Date "1962.08.30"]
[Round "11"]
[White "Hartoch, Robert G"]
[Black "Dunkelblum, Arthur"]
[Result "1/2-1/2"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Bd3 Ngf6 8. O-O e6 9. Bxg6 hxg6 10. Re1 Bd6 11. Qe2 O-O 12. Bg5 Qc7 13. a3 Rfe8 14. Ne5 Nf8 15. c4 N6h7 16. Bd2 Nf6 17. b4 Red8 18. Bc3 Be7 19. Ra2 N6d7 20. Ne4 Nxe5 21. dxe5 c5 22. b5 Rd7 23. Rd1 Rad8 24. Rad2 Rxd2 25. Rxd2 Rxd2 26. Qxd2 Nd7 1/2-1/2