[Event "Zonal-7 South America"]
[Site "Mar del Plata/ Buenos Aires"]
[Date "1954.05.??"]
[Round "18"]
[White "Castillo Larenas, Mariano"]
[Black "Najdorf, Miguel"]
[Result "0-1"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Ng4 9. Bg5
f6 10. Bc1 Nh6 11. dxe5 dxe5 12. b3 c6 13. a4 a5 14. Ba3 Re8 15. Qc1 Nf7 16. Rd1 Qc7 17.
b4 axb4 18. Bxb4 Bf8 19. Bxf8 Rxf8 20. Qe3 Ra5 21. Nd2 Nc5 22. Rdb1 Ng5 23. Nb3 Nxb3 24.
Rxb3 Ne6 25. Rd1 Qe7 26. Rb2 Qc5 27. Rbd2 Qxe3 28. fxe3 h5 29. h4 Nc5 30. Rd8 Be6 31.
Rxf8+ Kxf8 32. Rd8+ Ke7 33. Rb8 Ra6 34. Rh8 Rb6 35. Rh7+ Kf8 36. Rc7 Na6 37. c5 Nxc5 38.
Nd5 Rb2 39. Bf3 Bxd5 40. exd5 e4 41. dxc6 exf3 42. gxf3 bxc6 43. Rxc6 Nd7 44. f4 Ra2 45.
Rc4 Ke7 46. e4 Kd6 47. Rb4 Kc6 48. f5 gxf5 49. exf5 Nc5 0-1