Correct answer: Bf71.Kd7?? zz 1...Kd5 2.Qd4# but 1...c5! 1.Nf4?? zz 1...c5 2.Bd3#/Bf7# but 1...Kc5! 1.Bf5?? zz 1...Kd5 2.Qd4# but 1...c5! 1.B