[Event "Hastings 1975/76"]
[Site "Hastings ENG"]
[Date "1976.01.02"]
[EventDate "1975.12.29"]
[Round "4"]
[Result "1-0"]
[White "Viktor Korchnoi"]
[Black "Gudmundur Sigurjonsson"]
[ECO "E80"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "49"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 O-O 6. Bg5 c5
7. d5 e6 8. Qd2 exd5 9. cxd5 Nbd7 10. Nh3 a6 11. Nf2 Rb8
12. Be2 b5 13. O-O Re8 14. Rab1 Qa5 15. a3 c4 16. Kh1 Nc5
17. Qf4 Nfd7 18. Ng4 h5 19. Nh6+ Kh7 20. Nxf7 Rf8 21. Be7 Bb7
22. Bxd6 Kg8 23. Bxb8 Nxb8 24. Qd6 Nbd7 25. Ng5 1-0