[Event "Olympiad-08 Preliminaries C"]
[Site "Buenos Aires"]
[Date "1939.08.24"]
[Round "1"]
[White "Gudmundsson, Jon"]
[Black "De Groot, Adriaan"]
[Result "0-1"]
1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. d5 a5 9. a3 Nb6 10. b3 a4 11. Be3 Nfd7 12. Nd2 axb3 13. Qxb3 Nc5 14. Bxc5 dxc5 15. Nde4 Nd7 16. Qb5 b6 17. Qc6 Ra7 18. Nb5 Nb8 19. Nxa7 Nxc6 20. Nxc6 Qe8 21. a4 f5 22. Nd2 e4 23. Ra3 Bd7 24. Na7 Bxa4 25. Rb1 Qd7 26. Nb5 Bxb5 27. Rxb5 c6 28. Rxb6 cxd5 29. Rba6 Rb8 30. Ra7 Rb7 31. Ra8+ Kf7 32. h4 Bb2 33. Ra2 Bc3 34. cxd5 Qxd5 35. Nf1 Bd4 36. e3 Bb2 37. Nh2 c4 38. Bf1 c3 39. R2a4 Rc7 40. R8a5 Qc6 41. Ra7 Rxa7 0-1