Correct answer: Qf11.Qf3+?? 1...Kc5 2.Qc6# 1...Ke6 2.Qf7# 1...e4 2.Qf5# but 1...g:f3! 1.Q:g4?? zz 1...b4 2.Qc4# 1...e4 2.Qf5# but 1...Kc5! 1.
