1.
c4
Nf6
2.
g3
e6
3.
Bg2
d5
4.
Nf3
dxc4
5.
Qa4+
Nbd7
6.
Qxc4
c5
7.
O-O
b6
8.
b3
Bb7
9.
Bb2
Be7
10.
d3
O-O
11.
Nbd2
Nd5
12.
a3
Bf6
13.
Bxf6
1/2-1/2
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Event
Site
Budapest
Date
1975.12.??
White
Csom, Istvan
Black
Result
1/2-1/2
Score
[Event "HUN-ch31"] [Site "Budapest"] [Date "1975.12.??"] [Round "?"] [White "Csom, Istvan"] [Black "Portisch, Lajos"] [Result "1/2-1/2"] 1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 dxc4 5. Qa4+ Nbd7 6. Qxc4 c5 7. O-O b6 8. b3 Bb7 9. Bb2 Be7 10. d3 O-O 11. Nbd2 Nd5 12. a3 Bf6 13. Bxf6 1/2-1/2