Correct answer: Qf41...b5 2.Q:b5# 1...a6 2.Q:b6# 1...Bc3 2.b:c3# 1...R:b3 2.Na6# 1.Q:a7?? (2.Q:b6#) but 1...b5! 1.Qf4! (2.Ke5#) 1...N6g4/Nf5/Nf