1.
Nf3
Nf6
2.
c4
g6
3.
g3
Bg7
4.
Bg2
O-O
5.
Nc3
d6
6.
O-O
Nc6
7.
d4
a6
8.
d5
Na5
9.
Nd2
c5
10.
Rb1
Rb8
11.
b4
cxb4
12.
Rxb4
Qc7
13.
Na4
b5
14.
cxb5
axb5
15.
Nb2
Nxd5
16.
Bxd5
Qc5
17.
Nb3
Qxb4
18.
Bd2
Qa3
19.
Bxa5
Qxb2
20.
Bc7
Bh3
21.
Re1
Rbc8
22.
Ba5
Qxa2
23.
Bb4
Qc2
24.
Na5
Qxd1
25.
Rxd1
Rc2
26.
e3
Rfc8
27.
f4
Bc3
28.
Bxc3
R8xc3
29.
Re1
e6
30.
Be4
Ra2
0-1
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Event
Site
Seattle
Date
1966.08.19
Round
6
White
Koelsche, Giles A
Black
Result
0-1
Score
[Event "US Open-67"] [Site "Seattle"] [Date "1966.08.19"] [Round "6"] [White "Koelsche, Giles A"] [Black "Benko, Pal C"] [Result "0-1"] 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. O-O Nc6 7. d4 a6 8. d5 Na5 9. Nd2 c5 10. Rb1 Rb8 11. b4 cxb4 12. Rxb4 Qc7 13. Na4 b5 14. cxb5 axb5 15. Nb2 Nxd5 16. Bxd5 Qc5 17. Nb3 Qxb4 18. Bd2 Qa3 19. Bxa5 Qxb2 20. Bc7 Bh3 21. Re1 Rbc8 22. Ba5 Qxa2 23. Bb4 Qc2 24. Na5 Qxd1 25. Rxd1 Rc2 26. e3 Rfc8 27. f4 Bc3 28. Bxc3 R8xc3 29. Re1 e6 30. Be4 Ra2 0-1