|achieve: 46. Ra4 Bc5
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-- which position was reached in the rapid game today... Indeed like many I thought this would be an easy win, and took a few minutes to formulate a plan to exchange the light pieces, and aim for a technically won KPP v KPPPP. My plan and method hinged of course on getting the <a-pawn> on <a6>, and play the White Knight to <d4> via 'f3' following Ke2 to lift the "pin"...
I played white and rybka played black at 10-60 secs per move
47. a6 Ba7 48. Ke2 Kg5 <expected, of course, but allowing the intended piece trade by force> 49. Nf3+ Kf6 50. Nd4 Bxd4 51. Rxd4 Ra1 52. Rd7
All quite natural moves, as I am aiming to get 2 connected passers on f&g files, and push the h-pawn to trade off for the remaining g-pawn; but first give the a-pawn for Black's rook pawn (55.Rxh7 - of course Black may have a stronger defence but it's VERY hard to - if at all possible - find the best plan to annoy white as much as possible...)
Ra2+ 53. Ke3 Ra3+ 54. Kf4 Rxa6 55. Rxh7
The lion's share of the work has now been done, and a technical win remains. Still not easy to convert this but at top junior level you expect this to be an "ABC": keep creating a tempo and thus overburdening the defending rook and threatening to push back the Black King toward the edge of the board; its own back rank, and fall off...
g5+ 56. Kg3 Ra2 57. h4 Kg6 58. Rh8 gxh4+ 59. Rxh4 Kf5 60. f3 Ke5 61. Rh5+ Kd6
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This is now a formality at top level, but humans make mistakes, so still accuracy required.
This is the remainder of the execution in moving up the pawns, pushing back the Black King, and of course stay alert for stalemate traps and other swindles/tricks...
62. f4 Ke6 63. Kh3 Kf6 64. g4 Ra4 65. Kg3 Ra3+ 66. Kh4 Ra4 67. f5 Rd4 68. Rh6+ Kg7 69. Rb6 Kf7 70. Kg5 Rd7 71. Rb5 Kg8 72. f6 Ra7 73. Kg6 Rg7+ 74. Kf5 Ra7 75. g5 Kh7 76. g6+ Kh6 77. Re5 Rb7 78. g7 Rb8 79. Re4 Rb5+ 80. Ke6 Rb8 81. Rg4 Rb6+ 82. Kd7 Rb7+ 83. Kc6 Rb8 84. g8=Q Rxg8 85. Rxg8 Kh7 1-0
In retrospect I think this was a surprising let-off by Kramnik, and he surely (as is already confirmed) must have been too low on time to formulate a plan to simplify to a won endgame.