[Event "Baarn"] [Site "?"] [Round "0"] [White "Kramer"] [Black "Euwe"] [Result "0-1"] [ECO "E46"] [Opening "Nimzo-Indian: 4.e3 O-O"] {Black provokes Pd5 without playing ... Pc5} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. a3 Bxc3+ 6. bxc3 d6 7. Bd3 e5 8. Ne2 b6 9. Ng3 Nc6 10. Bb2 Ba6 11. e4 Qe8 12. Qe2 Na5 {Master play has few examples of the Wyvill formation with Black's c-pawn unmoved. The reason is obvious: the advance of Black's c-pawn is usually the only way of forcing White to push his d-pawn to d5. Only under very exceptional circumstances will he do it voluntarily} 13. a4 $2 { An instructive mistake, after which Black can force White's Pd5} (13. Nf1 { With his c-pawn thus secured, White could have set about preparing Kingside operations}) 13... Qe6 $1 14. d5 Qg4 15. f3 Qh4 16. O-O Nh5 $1 {Even now White' s best chance would be to force Pf4, and Black's maneuvers are directed against this possibility} 17. Nf5 Qg5 18. Bc1 (18. h4 Qd8 19. g3 g6) 18... Nf4 19. Bxf4 exf4 {Strategically Black's superiority seems overwhelming. He has support points at a5, c5 and e5, and White has the bad Bishop. Even so, the realisation of these advantages is far from simple} 20. Nd4 Rfe8 21. Nb5 (21. Rfb1 -- 22. Nb3) 21... Bxb5 22. cxb5 {The characteris tic doubled pawn of the Wyvill formation has gone, but White's strategic problems have not gone with it.} 22... Qf6 23. Ra3 Re5 24. Qd2 Rh5 25. g3 Rg5 26. Kf2 $1 Qh6 27. Kg2 Rh5 ( 27... fxg3 28. h4 Qxh4 29. Rh1 $18) 28. Rh1 g5 29. g4 Rh4 30. h3 Re8 31. Bf1 Qf6 32. Kf2 (32. Qd4) 32... h5 33. Rg1 hxg4 34. Rxg4 Rxg4 35. hxg4 Qh6 36. Kg1 Kg7 37. Qh2 Qg6 38. Ra2 Rh8 39. Qf2 Qh6 40. Qh2 Qf6 41. Qc2 Nb7 42. Qd2 Qh6 43. Qd4+ f6 44. Bg2 Nc5 45. Kf1 Qh2 46. a5 $2 (46. Qg1 {could still hold out}) 46... bxa5 47. Qg1 (47. Rxa5 Nb3 48. Qxa7 Nd2+ $1) 47... Qg3 48. Qf2 a4 49. Qxg3 fxg3 50. Ke2 Rh2 51. Ke3 Nb3 52. f4 Nc1 53. Ra1 (53. Rc2 gxf4+ 54. Kxf4 Nd3+ 55. Kxg3 Ne1 $19) 53... Rxg2 54. Rxc1 Rb2 0-1