[Event "NED-ch27"]
[Site "Leeuwarden"]
[Date "1972.04.03"]
[Round "7"]
[White "Van den Berg, Ad"]
[Black "Hartoch, Robert G"]
[Result "1/2-1/2"]
[ECO "B06"]
[Opening "Modern Defense"]

1. e4 g6 2. d4 Bg7 3. c4 c5 4. Ne2 Nc6 5. d5 Nd4 6. Nxd4 cxd4 7. Bd3 d6 8. O-O Nf6 9. Nd2 O-O 10. b4 e5 11. c5 Ne8 12. Ba3 f5 13. Qb3 Qg5 14. Rad1 h5 15. Bc1 f4 16. Kh1 h4 17. h3 Nf6 18. Be2 Rf7 19. cxd6 Ne8 20. Nc4 Bf8 21. Bd2 Bxd6 22. a4 Qf6 23. Bf3 Bd7 1/2-1/2