Correct answer: Ng61...g:h4 2.Qf5# 1.Qg3?? zz 1...g:h4 2.Bf3# but 1...g4! 1.Ng2?? zz 1...Kg6 2.Qf7# 1...g4 2.Qf5# but 1...Kg4! 1.Ng6! zz 1...K