>>20821black queen X white rook, check
forces white knight X queen
black rook X white knight on f7 threatening white queen
white queen retreats to guard the white knight
black rook X white knight, check w/ queen fork
white queen X black rook
black bishop X white queen
white king X black bishop
black to move, up a bishop, for an easy victory
in the actual game, white resigned after black rook X white knight on f7
unfortunate.