[Event "Mar del Plata International-20"]
[Site "Mar del Plata"]
[Date "1957.03.30"]
[Round "12"]
[White "Ader Hausman, Walter"]
[Black "Najdorf, Miguel"]
[Result "0-1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 O-O 8. c3 d6 9. h3
Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Re8 13. Nf1 Bf8 14. Bg5 Nd7 15. Ne3 Nb6 16. Bh4 f6 17.
b4 Nac4 18. Nd5 Nxd5 19. exd5 cxb4 20. cxb4 Qf7 21. Nh2 Bb7 22. Qd3 g5 23. Ng4 gxh4 24.
Nxf6+ Kh8 25. Nxe8 Rxe8 26. f4 e4 27. Rxe4 Rxe4 28. Qxe4 Bxd5 29. Qf5 Qxf5 30. Bxf5 Bg7
31. Kh2 Ne3 32. Bc8 Bxd4 33. Re1 Bxa2 34. Bxa6 Bc4 35. g4 d5 36. Bc8 Bb6 37. f5 d4 38. Ra1
Bd5 39. Bd7 d3 40. Bxb5 d2 41. Be2 Kg7 42. b5 Bc4 43. Bf3 Kf6 44. Ra6 Nd5 45. Ra1 Ke5 46.
Rb1 Ne3 47. Ra1 0-1