Scottrf, I think you meant that the person is playing black. I think I've seen puzzles declined due to have multiple replies from the computer that result in the same outcome, but I'm willing to accept I could be wrong.
DJDopamine, Rc4+ is a great move. It's too bad they're not accept puzzles.
He was clearly just demonstrating the mate threat to show that white can't queen.
Other moves are more obviously losing because you win the bishop with check.
And btw it doesn't matter that black has multiple moves to choose from, since you're playing white.