| Peligroso Patzer: This game is analyzed as Game #14 in the recently-published book, <The Greatest Ever chess endgames> (<sic>), by Giddins, Steve, Everyman Chess ©2012, at pp. 65-67. I highly recommend this book, both for its selection of games and its very instructive analysis and commentary. Giddinss commentary on <41.
g6> (bringing about the position in the diagram below) 
click for larger view is one instance in which he might have been a bit more expansive. He mentions that the move controls the f5-square (preparing
e5 without allowing Nf5 in reply) and then says: <Naturally, there can be no question of White entering the king and pawn ending, because Black will simply win the queenside pawns with
Kc5-b4.> (Op. cit., p. 66) The king and pawn ending would, of course, be winning for Black, but it is not quite as simple as the foregoing statement implies. White can get his King to c2 in time to hold the Q-side pawns after <42.Nxc6 Kxc6 43.Ke3 Kc5 44.Kd3 Kb4 45.Kc2>, resulting in this position: 
click for larger view From this position, Black wins easily by continuing <45.
e5>, and the White King must either let the Black e-pawn run through to promotion or abandon the Q-side pawns. After <42.Nxc6 Kxc6>, White can actually put up much tougher resistance with <43.b4> (rather than <43. Ke3>), creating blockage on the Q-side dark squares (and possibly deserving to be annotated !, although the defense remains ultimately futile). In this line, Black wins from the resulting position: 
click for larger view as follows: <43.b4 axb4 44.Ke3 Kc5 45.b3> (or <45.Kd3 e5 46.fxe5> (Hopeless is <46.g3 b3!> (zugzwang) <47.fxe5 (or 47.Kc3 e4 48.Kxb3 e3 49.Kc3 e2 50.Kd2 Kxc4 51.Kxe2 Kb3+) 47...fxe5 48.Ke4 Kxc4 49.Kxe5 Kd3 50.Kf6 Kc2 51.Kxg6 Kxb2 52.Kxh5 Kc2> and Black's passer is much faster.] <46...fxe5 47.b3 Kd6 48.Ke3 Ke6 49.Ke4 Kf6 50.Ke3 Kf5 51.Kf3 e4+ 52.Ke3 Ke5 53.Ke2 Kd4>, etc.) <45...e5 46.g3> (or <46.fxe5 fxe5 47.Ke4 Kd6 48.Kf3 Ke6 49.Ke4 Kf6 50.Ke3 Kf5 51.Kf3 e4+ 52.Ke3 Ke5 53.Ke2 Kf4 54.Kf2 e3+ 55.Ke2 Ke4 56.Ke1 Kd3>, etc.) <46...Kd6 47.Kf3 (or 47.Ke4 Ke6 48.Ke3 Kf5 49.Kf3 g5> +) <47...Ke6 48.Ke4 f5+ 49.Kd3 e4+ 50.Ke2 Kd6 51.Kd2 Kc5 52.Ke3 b5 53.cxb5 Kxb5 54.Kd2 Kc5 55.Ke3 (or 55.Ke2 Kd4 56.Kd2 e3+ 57.Ke2 Ke4 58.Ke1 Kd3 59.Kd1 Kc3+) 55...Kd5 56.Ke2 Kd4 57.Kd2 e3+ 58.Ke2 Ke4 59.Ke1 Kd3 60.Kd1 Kc3> +. | 
Kibitzing
>, but not quite as simply as the comment from Giddins (as quoted in previous post) implies.
