1.
Nf3
Nf6
2.
c4
g6
3.
Nc3
Bg7
4.
e4
d6
5.
d4
O-O
6.
Be2
e5
7.
Be3
Ng4
8.
Bg5
f6
9.
Bh4
Nc6
10.
d5
Ne7
11.
Nd2
Nh6
12.
f3
c5
13.
a3
Nf7
14.
b4
b6
15.
Rb1
Kh8
16.
Bd3
Ng8
17.
Bc2
Bh6
18.
Qe2
a6
19.
Ba4
Ra7
20.
Rb3
Bg5
21.
Bf2
f5
22.
O-O
Nf6
23.
bxc5
bxc5
24.
Rfb1
Bxd2
25.
Qxd2
fxe4
26.
Nxe4
Nxe4
27.
fxe4
Ng5
28.
Re3
Raf7
29.
Bg3
h5
30.
Bh4
Rf4
31.
Bg3
R4f7
32.
Bh4
Kg7
33.
Bc2
Nf3+
34.
Rxf3
Qxh4
35.
Rxf7+
Rxf7
36.
Bd3
Bd7
37.
Rf1
Rxf1+
38.
Kxf1
Qxh2
39.
Qa5
Qf4+
40.
Kg1
Qe3+
41.
Kh2
Kh6
42.
Qd8
1/2-1/2
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Event
Site
Petropolis
Date
1973.07.29
Round
5
White
Black
Biyiasas, Peter
Result
1/2-1/2
Score
[Event "Interzonal-09b"] [Site "Petropolis"] [Date "1973.07.29"] [Round "5"] [White "Ivkov, Borislav"] [Black "Biyiasas, Peter"] [Result "1/2-1/2"] 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be2 e5 7. Be3 Ng4 8. Bg5 f6 9. Bh4 Nc6 10. d5 Ne7 11. Nd2 Nh6 12. f3 c5 13. a3 Nf7 14. b4 b6 15. Rb1 Kh8 16. Bd3 Ng8 17. Bc2 Bh6 18. Qe2 a6 19. Ba4 Ra7 20. Rb3 Bg5 21. Bf2 f5 22. O-O Nf6 23. bxc5 bxc5 24. Rfb1 Bxd2 25. Qxd2 fxe4 26. Nxe4 Nxe4 27. fxe4 Ng5 28. Re3 Raf7 29. Bg3 h5 30. Bh4 Rf4 31. Bg3 R4f7 32. Bh4 Kg7 33. Bc2 Nf3+ 34. Rxf3 Qxh4 35. Rxf7+ Rxf7 36. Bd3 Bd7 37. Rf1 Rxf1+ 38. Kxf1 Qxh2 39. Qa5 Qf4+ 40. Kg1 Qe3+ 41. Kh2 Kh6 42. Qd8 1/2-1/2