Correct answer: a31.Kc4?? (2.Q:b4#) but 1...Ka3! 1.Kc5?? (2.Q:b4#) but 1...Ka3! 1.Qe6?? (2.Qa6#) 1...Ka3 2.Q:b3# but 1...b:a2! 1.a3! (2.Q:b4#)