Correct answer: Qf71...N:b4+ 2.N:b4# 1.Qf7! (2.Nef4#/Nf8#/Ng5#/Ng7#/Nd8#/Nec5#/Nc7#) 1...N:b4+ 2.N:b4# 1...Nc5/c5 2.Ne:c5# 1..
