[Event "Moskva"] [Site "Moskva"] [Round "6"] [White "Capablanca"] [Black "Ragozin"] [Result "1-0"] [ECO "E20"] [Opening "Nimzo-Indian Defence"] {How Black should not treat the Wyvill formation} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 d6 6. Qc2 O-O 7. e4 e5 8. Bd3 c5 9. Ne2 Nc6 10. d5 Ne7 $2 { Here we see the Wyvill formation in its worst light for Black who 1) has blocked c5 so that his Knight can't use it 2) Has castled Kingside 3) can't now put pressure on the c-pawn, as he could have done by 10... Na5, followed by ... Pb5 and ...Ba6} 11. f3 Nd7 12. h4 Nb6 13. g4 f6 {Permits White to open the g-file, but also enables his own King to escape to the Queenside} 14. Ng3 Kf7 15. g5 Ng8 16. f4 Ke8 17. f5 Qe7 18. Qg2 {Now that B lack is deprived of all chance of counterplay, White can prepare the decisive action at leisure. It is clear that the g-file will be the scene of the final showdown} 18... Kd8 19. Nh5 Kc7 20. gxf6 gxf6 21. Ng7 Bd7 22. h5 Rac8 23. h6 {This support point at g7 is of the utmost importance. White will be able to switch the Knight at will to e6 and replace it with a Rook} 23... Kb8 24. Rg1 Rf7 25. Rb1 Qf8 26. Be2 Ka8 27. Bh5 Re7 28. Qa2 Qd8 29. Bd2 Na4 { Again we witness combined operations by White on both flanks} 30. Qb3 Nb6 ( 30... b6 31. Ne6) 31. a4 $1 Rb8 (31... Bxa4 32. Qa2 Bd7 33. Ne6 Bxe6 34. dxe6 Rec7 35. Rxb6) 32. a5 Nc8 33. Qa2 Qf8 34. Be3 b6 35. a6 Qd8 36. Kd2 Qf8 37. Rb2 Qd8 38. Qb1 b5 {An attempt to get some counterplay even now. If he continues to do nothing, White will penetrate via the g-file} 39. cxb5 Nb6 40. Qa2 c4 41. Qa3 Qc7 42. Kc1 Rf8 43. Rbg2 Qb8 44. Qb4 Rd8 45. Rg3 Rf8 46. Ne6 Bxe6 (46... Rc8 47. Bxb6 axb6 48. a7) 47. dxe6 Rc7 48. Qxd6 Ne7 49. Rd1 1-0