Black has to try to pin or x-ray attack the rook to draw the game while avoiding the loss of his own bishop will lose the game.

1.Rf5 Bd6 2.Ke2 Kd7 3.Ke3 Ke7 4.Ke4 Bg3 5.Rf3 Bd6 6.Kd5 Bb4 7.Re3+ Kd7 8.Rh3 Be7 9.Rh7 Kd8 the only move to save the game [If 9...Ke8 10.Ke6 will force the issue 10...Bc5 (10...Bf8 11.Rh8 Kd8 12.Rxf8+ wins; 10...Bg5 11.Rh8# ; 10...Kd8 11.Rxe7 wins; 10...Ba3 11.Ra7 Bc5 12.Ra8# ) 11.Rc7 Bb6 12.Rc8+ Bd8 13.Rb8 A waiting move.. 13...Kf8 14.Rxd8+ wins]

10.Ke6 Bc5 11.Rf7 Be3 12.Kd6 Kc8 13.Kc6 Kb8 the White King can not come right in front of the Black King and hence can not checkmate straight away.

14.Re7 Bg1 15.Re8+ Ka7 16.Re1 Bf2 17.Ra1+ Kb8 18.Ra2 Be3 19.Rb2+ Ka7 [If 19...Kc8 20.Re2 Bg5 21.Re8+ Bd8 22.Rf8 again... that waiting move! 22...Kb8 23.Rxd8+ Ka7 another quiet one 24.Rc8 Ka6 25.Ra8# ] 1/2-1/2

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