[Event "World U20-ch03 Preliminaries B"]
[Site "Antwerp"]
[Date "1955.07.21"]
[Round "1"]
[White "Portisch, Lajos"]
[Black "Donia, M"]
[Result "1-0"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 c5 5. d5 exd5 6. cxd5 d6 7. e3 Bf5 8. Qf3 Bg6 9. Bb5+ Nbd7 10. h4 h6 11. Bxf6 Qxf6 12. Qxf6 gxf6 13. Ne2 a6 14. Bxd7+ Kxd7 15. O-O-O Bh5 16. f3 f5 17. Nf4 Bg6 18. Rhe1 Rae8 19. Re2 Re7 20. Rh1 h5 21. Rh3 Ree8 22. Rg3 Rhg8 23. Nd1 Ba5 24. Nf2 Bd8 25. Rh3 Bf6 26. Rh1 Re7 27. N2d3 Rge8 28. Kd2 c4 29. Nxg6 fxg6 30. Nf4 Bxb2 31. Nxg6 c3+ 32. Kd3 Rh7 33. Nf4 b5 34. Kc2 a5 35. Nd3 Rhe7 36. Nxb2 cxb2 37. Rhe1 Re5 38. e4 fxe4 39. fxe4 Rg8 40. Kd3 Rg4 41. Rxb2 b4 42. Rf2 Kc7 43. Rf7+ Kb6 44. a4 Rxg2 45. Rc1 Rg3+ 46. Kd4 Rc3 47. Rxc3 bxc3 48. Rd7 Re6 49. dxe6 c2 50. Rxd6+ Kc7 51. Rd5 c1=Q 52. Rc5+ Qxc5+ 53. Kxc5 Kc8 54. Kc6 Kd8 1-0