Sharingan lvl 3 (puzzle)

I think there may be a flaw in your puzzle. What happens if instead of 1. . . KxQ, the black king retreats? 1. . . Ka6?

I think there may be a flaw in your puzzle. What happens if instead of 1. . . KxQ, the black king retreats? 1. . . Ka6?
well, most player will take the queen out of the board.