08-08-2014, 12:35 PM
Paradoxically (or not given, as Robert Lothian commented, the h-pawn makes no difference in some lines) the winning line involves giving up the h-pawn.
49. ... Rc4+ 50. Kf3 only winning move Kg7 51. Rg5+ only winning move White loses the h-pawn but after White's next move the White rook defends the a-pawn from the side and the Black king is cut-off Kh6 52. Rg4 only winning move Rc3+ 53 Ke4 only winning move Kxh5 54. Rf4 only winning move Kg5 and only now do both 55. Ke5 and 55, Rf5+ win
A very narrow winning path and far from obvious
Edit You can also use <!-- m --><a class="postlink" href="http://www.shredderchess.com/online-chess/online-databases/endgame-database.html">http://www.shredderchess.com/online-che ... abase.html</a><!-- m --> as well as the site Jonathan mentioned
49. ... Rc4+ 50. Kf3 only winning move Kg7 51. Rg5+ only winning move White loses the h-pawn but after White's next move the White rook defends the a-pawn from the side and the Black king is cut-off Kh6 52. Rg4 only winning move Rc3+ 53 Ke4 only winning move Kxh5 54. Rf4 only winning move Kg5 and only now do both 55. Ke5 and 55, Rf5+ win
A very narrow winning path and far from obvious
Edit You can also use <!-- m --><a class="postlink" href="http://www.shredderchess.com/online-chess/online-databases/endgame-database.html">http://www.shredderchess.com/online-che ... abase.html</a><!-- m --> as well as the site Jonathan mentioned