1.
Nf3
Nf6
2.
g3
g6
3.
c4
Bg7
4.
Bg2
O-O
5.
Nc3
c5
6.
d4
cxd4
7.
Nxd4
Nc6
8.
O-O
d6
9.
Nc2
Be6
10.
b3
Qd7
11.
Bb2
Bh3
12.
f3
Bxg2
13.
Kxg2
Rfd8
14.
e4
e6
15.
Ne3
1/2-1/2
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Event
Site
Varna
Date
1969.09.13
Round
11
White
Liebert, Heinz
Black
Result
1/2-1/2
[Event "Varna-08"] [Site "Varna"] [Date "1969.09.13"] [Round "11"] [White "Liebert, Heinz"] [Black "Krogius, Nikolai V"] [Result "1/2-1/2"] 1. Nf3 Nf6 2. g3 g6 3. c4 Bg7 4. Bg2 O-O 5. Nc3 c5 6. d4 cxd4 7. Nxd4 Nc6 8. O-O d6 9. Nc2 Be6 10. b3 Qd7 11. Bb2 Bh3 12. f3 Bxg2 13. Kxg2 Rfd8 14. e4 e6 15. Ne3 1/2-1/2