Correct answer: Qa11...Nc1/Nc3+ 2.Qc3# 1...b2 2.Rc5# 1.Qe3?? (2.Qc5#/Qb6#/Qa7#) 1...Nc3+ 2.Q:c3# but 1...Nb4! 1.Qe7?? (2.Qc5#) 1...N