Correct answer: N:c61...e:d4 2.Qf5# 1.Re7?? (2.R:d7#) 1...e:d4 2.Qf5# but 1...d6! 1.Kf3?? (2.Qe4#) but 1...c5! 1.Rb7?? (2.R:d7#) 1...e:d4 2.Qf5# but 1...d6!