white to move and win.



This may be the most famous composed problem ever and is called the Saavedra position. It is named after Fr. Saavedra; a priest living in Glasgow when this position was published in the Glasgow Weekly Citizen, in 1895. The original compostion was published with colors reversed, the pawn on c7, and the caption "white to play and draw." Saavedra's sole contribution was the simple c8/R, which secured a win for white as well as a place in chess history for Fr. Saavedra. This position has been an inspiration to many composers, who might wonder "If all this is possible with just four pieces, think what is possible with a full set!"
More interesting stuff if you Wikipedia "Saavedra position."

No kidding, there's no reason whatsoever for not choosing the queen . This is a terrible puzzle!
If you choose the queen, then black rook will move to C4+, forcing newly promoted queen to kill Rook QxR, resulting in a stalemate. This is what Andy mentioned in his post...