1.
d4
Nf6
2.
c4
e6
3.
Nc3
Bb4
4.
e3
O-O
5.
Bd3
c5
6.
Nf3
b6
7.
d5
exd5
8.
cxd5
d6
9.
O-O
Re8
10.
Ne2
a6
11.
a3
Ba5
12.
Ng3
Nbd7
13.
h3
Nf8
14.
b4
cxb4
15.
Bd2
bxa3
16.
Bxa5
bxa5
17.
Bc2
Bd7
18.
Rxa3
Bb5
19.
Re1
N8d7
20.
e4
g6
21.
Qd2
Rc8
22.
Bb1
a4
23.
Qh6
Qa5
24.
Rae3
Rc3
25.
Nh4
Kh8
26.
e5
Ng8
27.
Qf4
Rxe3
28.
Rxe3
Nxe5
29.
Qd4
Qc7
30.
Ne4
f6
31.
Rc3
Qe7
32.
f4
Nd7
33.
Kh2
Nc5
34.
Nxc5
dxc5
35.
Rxc5
Qe1
36.
Nxg6+
hxg6
37.
Bxg6
Re3
0-1
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Event
Site
Budapest
Date
1970.02.21
Round
12
White
Black
Csom, Istvan
Result
0-1
Score
[Event "Budapest International"] [Site "Budapest"] [Date "1970.02.21"] [Round "12"] [White "Portisch, Lajos"] [Black "Csom, Istvan"] [Result "0-1"] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 b6 7. d5 exd5 8. cxd5 d6 9. O-O Re8 10. Ne2 a6 11. a3 Ba5 12. Ng3 Nbd7 13. h3 Nf8 14. b4 cxb4 15. Bd2 bxa3 16. Bxa5 bxa5 17. Bc2 Bd7 18. Rxa3 Bb5 19. Re1 N8d7 20. e4 g6 21. Qd2 Rc8 22. Bb1 a4 23. Qh6 Qa5 24. Rae3 Rc3 25. Nh4 Kh8 26. e5 Ng8 27. Qf4 Rxe3 28. Rxe3 Nxe5 29. Qd4 Qc7 30. Ne4 f6 31. Rc3 Qe7 32. f4 Nd7 33. Kh2 Nc5 34. Nxc5 dxc5 35. Rxc5 Qe1 36. Nxg6+ hxg6 37. Bxg6 Re3 0-1