[Event "IBM"]
[Site "Amsterdam"]
[Date "1962.08.21"]
[Round "6"]
[White "Dunkelblum, Arthur"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bg5 O-O 9. Rc1 b6 10. cxd5 exd5 11. Be2 Be6 12. O-O Ne4 13. Bxe7 Nxe7 14. Bd3 1/2-1/2