| offramp: Hmmm. I think we need to look a bit more closely at a crucial line, especially thee, <acirce>! After the brilliant move 63.Nc6 we have this position:
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In Informator Eingorn gives this variation: 63... Bxc6 64. bxc6 a6 65. c7 b5 66. Bxb5 axb5 67. Kb4 Ke6 68. Kxb5 Kd7 69. Kb6 which looks more or less forced and which he gives as  .
It does look fairly bleak for black,
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as white is free to play a3-a4/5/6/7 and queen. But black has a knight to give up for the a8(Q) eventuality and thereupon the black king takes the c7 pawn. For example: 69...Nc8+
<(69... Kc8 seems to lead to the same position: 70. a4 g4 71. fxg4 fxg4 72. a5 h5 73. a6 Kd7 74. a7 Nc8+ 75.Kb7 Nxa7 76. Kxa7 Kxc7)>
70. Kb7 g4 71. fxg4 fxg4 72.a4 h5 73. a5 Ne7 74. a6 Nc8 75. Kb8 Ne7 76. a7 Nc6+ 77. Kb7 Nxa7 78. Kxa7 Kxc7 and that leads us to this position:
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which I think is a draw!
Eingorn was still definitely playing the best moves, though. | 
sac: 64.bxa6
