[Event "NED-ch"]
[Site "Leeuwarden NED"]
[Date "1971.04.15"]
[EventDate "?"]
[Round "10"]
[Result "1-0"]
[White "Paul Boersma"]
[Black "Willem Andriessen"]
[ECO "A01"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "55"]

1. b3 c5 2. Bb2 Nc6 3. c4 e5 4. g3 g6 5. Bg2 Bg7 6. d3 Nge7
7. Nc3 d6 8. Qd2 O-O 9. e3 Be6 10. Nd5 Qd7 11. h4 Bxd5
12. cxd5 Nb4 13. e4 f5 14. a3 Na6 15. Nf3 c4 16. bxc4 Nc5
17. Ng5 Bh6 18. Qe2 Qa4 19. O-O f4 20. Rab1 Rae8 21. d4 exd4
22. Bxd4 Bxg5 23. hxg5 f3 24. Bxf3 Nxd5 25. Bg2 Nb6 26. e5 Nb3
27. Bxb6 axb6 28. Qd1 1-0