Annotated by lrgraham (1578): This move caused me to end in a draw... I should have moved
64. Nc3 a5
65. bxa5 Ka6
66. Kb4 Kb7
67. Kxb5 Kc7
68. a6 Kb8
69. Kb6 Ka8
70. Nd5 Kb8
71. Nc7 Kc8
72. a7 Kd7
73. a8=Q
Black's powerful move here forces the loss of white's only pawn...…
