1.
d4
Nf6
2.
c4
d6
3.
Nf3
Bg4
4.
Qb3
Qc8
5.
h3
Bxf3
6.
Qxf3
g6
7.
Bg5
Bg7
8.
Nc3
Nbd7
9.
e3
c6
10.
Be2
O-O
11.
O-O
Qc7
12.
Rfd1
Rfe8
13.
e4
c5
14.
d5
a6
15.
Qd3
e6
16.
dxe6
Rxe6
17.
f4
Rae8
18.
Bf3
b5
19.
Kh1
bxc4
20.
Qxc4
h6
21.
Bh4
Nb6
22.
Qxa6
d5
23.
Bxf6
Rxf6
24.
exd5
Rxf4
25.
d6
Qd7
26.
Qb7
Qf5
27.
d7
Nxd7
28.
Bc6
Ne5
29.
Bxe8
Nd3
30.
Qxf7+
1-0
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Event
Site
Eersel
Date
1966.02.05
Round
5
White
Black
Orbaan, Constant
Result
1-0
Score
[Event "Eersel Agio-03"] [Site "Eersel"] [Date "1966.02.05"] [Round "5"] [White "Ivkov, Borislav"] [Black "Orbaan, Constant"] [Result "1-0"] 1. d4 Nf6 2. c4 d6 3. Nf3 Bg4 4. Qb3 Qc8 5. h3 Bxf3 6. Qxf3 g6 7. Bg5 Bg7 8. Nc3 Nbd7 9. e3 c6 10. Be2 O-O 11. O-O Qc7 12. Rfd1 Rfe8 13. e4 c5 14. d5 a6 15. Qd3 e6 16. dxe6 Rxe6 17. f4 Rae8 18. Bf3 b5 19. Kh1 bxc4 20. Qxc4 h6 21. Bh4 Nb6 22. Qxa6 d5 23. Bxf6 Rxf6 24. exd5 Rxf4 25. d6 Qd7 26. Qb7 Qf5 27. d7 Nxd7 28. Bc6 Ne5 29. Bxe8 Nd3 30. Qxf7+ 1-0