[Event "Olympiad-04"]
[Site "Prague"]
[Date "1931.07.14"]
[Round "5"]
[White "Opocensky, Karel"]
[Black "Halvorsen, Trygve"]
[Result "1-0"]

1. b4 e5 2. Bb2 d6 3. c4 Be6 4. e3 Be7 5. Nc3 Nf6 6. Nf3 O-O 7. Qc2 Nc6 8. a3 a5 9. b5 Nb8 10. Be2 Qd7 11. O-O Bf5 12. e4 Bg4 13. d4 exd4 14. Nxd4 Bxe2 15. Qxe2 Re8 16. Nf5 Bf8 17. Qf3 Qe6 18. Rfe1 Nbd7 19. Nd5 Nxd5 20. cxd5 Qg6 21. Rac1 Rac8 22. Re3 b6 23. Qh3 Ne5 24. Rg3 Qf6 25. Bd4 Kh8 26. f4 g6 27. fxe5 dxe5 28. Rc6 1-0