[Event "Interzonal-13a"]
[Site "Tunis"]
[Date "1985.05.17"]
[Round "16"]
[White "Sosonko, Gennadi"]
[Black "Zapata, Alonso"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2535"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 c5 6. d5 d6 7. Be2 e6 8. O-O Re8 9. Bf4 exd5 10. exd5 Ne4 11. Nxe4 Rxe4 12. Qd2 Bg4 13. Rae1 Qf6 14. Bg5 Qxb2 15. Qxb2 Bxb2 16. h3 Bd7 17. Bd3 Rxe1 18. Rxe1 Bg7 19. Nd2 Be5 20. Nf3 Bg7 1/2-1/2