[Event "Olympiad-10 Preliminaries A"]
[Site "Helsinki"]
[Date "1952.08.14"]
[Round "5"]
[White "Jacob, Franz"]
[Black "Ortega, Rogelio"]
[Result "0-1"]

1. d4 e6 2. Nf3 f5 3. g3 Nf6 4. Bg2 d5 5. O-O Bd6 6. c4 c6 7. cxd5 cxd5 8. Nc3 Nc6 9. Bg5 O-O 10. e3 Bd7 11. Rc1 Rc8 12. Qe2 a6 13. Rfd1 Qe8 14. Bxf6 Rxf6 15. Qd2 Qh5 16. a3 Rcf8 17. Na4 g5 18. Nc5 Bc8 19. e4 fxe4 20. Qxg5+ Qg6 21. Qxg6+ hxg6 22. Ng5 Bxc5 23. Rxc5 Rxf2 24. b4 Kg7 25. Bh3 e3 26. Re1 e2 27. Bg2 Nxd4 28. Rxc8 Rxg2+ 29. Kxg2 Rxc8 30. Nf3 Nxf3 31. Kxf3 Rc3+ 32. Kxe2 Rxa3 33. Kf2 Kf6 34. Rb1 e5 35. b5 a5 36. b6 e4 37. Rb5 Ke5 38. Rc5 Rb3 39. Rxa5 Rxb6 40. Ra8 Rb2+ 0-1