October Revolution 50
 
Moscow / 1967.06.12
 
Black: Smyslov, Vassily
 

 
White: Portisch, Lajos

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E41: Nimzo-Indian, 4.e3 c5
 

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7 11. Bd2 Rc8 12. Bd3 cxd4 13. exd4 h6 14. Rfe1 Qd8 15. Qc1 Qf8 16. Ne5 Nc6 17. Nxd7 Nxd7 18. Re4 f5 19. Re1 Nxd4 20. Qd1 Nf6 21. Be3 e5 22. Qa4 Bb6 23. Bxd4 exd4 24. Ne2 Ne4 25. Nf4 Rc6 26. g3 Qf7 27. Bb1 Kh8 28. Ba2 Qf6 29. Bd5 d3 30. Bxc6 Bxf2+ 31. Kh1 Qxc6 32. Qxc6 bxc6 33. Red1 d2 34. Kg2 Bd4 35. Rab1 Rb8 36. Ne2 Bxb2 37. Kf3 Rb3+ 38. Kf4 Nd6 39. Rxd2 g5# (Black wins)