[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.10"]
[Round "14"]
[White "Sosonko, Gennadi"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]
[WhiteElo "2575"]
[BlackElo "2620"]
1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O 7. O-O Nbd7 8. Qb3 c6 9. Nc3 b6 10. Rac1 Bb7 11. Rfd1 Rc8 12. Bf4 Nh5 13. Bd2 Nhf6 14. Bf4 c5 15. cxd5 Nxd5 16. Nxd5 Bxd5 17. Qa4 Bc6 1/2-1/2