1.
Nf3
d5
2.
d4
e6
3.
c4
c6
4.
Nc3
dxc4
5.
e3
b5
6.
a4
Bb4
7.
Bd2
a5
8.
Ne5
Bb7
9.
Qg4
1/2-1/2
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Event
Site
Chicago
Date
1979.08.09
Round
11
White
Diesen, Mark C
Black
Result
1/2-1/2
WhiteElo
2487
BlackElo
2445
[Event "US Open-80"] [Site "Chicago"] [Date "1979.08.09"] [Round "11"] [White "Diesen, Mark C"] [Black "Bisguier, Arthur Bernard"] [Result "1/2-1/2"] [WhiteElo "2487"] [BlackElo "2445"] 1. Nf3 d5 2. d4 e6 3. c4 c6 4. Nc3 dxc4 5. e3 b5 6. a4 Bb4 7. Bd2 a5 8. Ne5 Bb7 9. Qg4 1/2-1/2