the unusual question by doug was 'how can i check the white king' he he,
which is unusual because the goal of chess is checkmate, not checking the
king. check's mean nothing really if the king being checked can easily
move out of the way or block the check.
still, asking how can i check the white king, indicates that black has the
move, he he, and if this is so, black can check straight away, playing
bishop takes bishop, check, and this move also wins on the spot.
a very interesting chess problem despite it's easiness lol :)