This mate in 3 begins with white playing Qxf7, check. Black is virtually forced to play Bxf7. (If he plays K-h8, white mates with Q-f8.)  So , after Bxf7, white plays Rxc8 check. Then after black plays  B-e8, whites mates with Rxe8.

I hope you found the answer. Look for another new challenging chess puzzle in my next post!