Correct answer: e41...f3 2.Qb6# 1.Ka2?? (2.Qb6#) but 1...e4! 1.Ka4?? (2.Qb6#) but 1...e4! 1.Kb2?? (2.Qb6#) but 1...e4! 1.Rb1?? zz 1...f3 2.Qb6# but 1...e4