Correct answer: Kg71...d4 2.e:d4# 1...f:e3/f3 2.Qh2# 1.Rg6?? (2.Q:f6#) but 1...f:e3! 1.Be7?? (2.Q:f6#) but 1...f:e3! 1.Bb6?? (2.Bc7#) 1...f:e3 2.Qh2# but 1...K