1.
e4
c5
2.
Nf3
d6
3.
d4
cxd4
4.
Nxd4
Nf6
5.
Nc3
a6
6.
Be2
e5
7.
Nb3
Be7
8.
O-O
O-O
9.
Be3
Qc7
10.
a4
b6
11.
Qd2
Be6
12.
Rfd1
Nbd7
13.
f3
Rfd8
14.
Nc1
Nf8
15.
Nd5
Nxd5
16.
exd5
Bf5
17.
c4
Nd7
18.
a5
bxa5
19.
Nb3
a4
20.
Rxa4
Nc5
21.
Nxc5
dxc5
22.
Qa5
Qd6
23.
b4
Bc2
24.
bxc5
Qg6
25.
Rda1
Bxa4
26.
Qxa4
Rdb8
27.
Rd1
Rb1
28.
Bd3
Qxd3
0-1
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Event
Site
Amsterdam
Date
1967.??.??
Round
4
White
Zuidema, Coen
Black
Donner, Jan Hein
Result
0-1
[Event "IBM"] [Site "Amsterdam"] [Date "1967.??.??"] [Round "4"] [White "Zuidema, Coen"] [Black "Donner, Jan Hein"] [Result "0-1"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Be3 Qc7 10. a4 b6 11. Qd2 Be6 12. Rfd1 Nbd7 13. f3 Rfd8 14. Nc1 Nf8 15. Nd5 Nxd5 16. exd5 Bf5 17. c4 Nd7 18. a5 bxa5 19. Nb3 a4 20. Rxa4 Nc5 21. Nxc5 dxc5 22. Qa5 Qd6 23. b4 Bc2 24. bxc5 Qg6 25. Rda1 Bxa4 26. Qxa4 Rdb8 27. Rd1 Rb1 28. Bd3 Qxd3 0-1