Correct answer: Nb6+1...Kb5 2.Qb3# 1.Qd3?? (2.Nc5#/Nb6#) but 1...e:d3! 1.Qc3?? zz 1...Kb5 2.Qc6#/Qb3# but 1...e3! 1.Qg3?? zz 1...Kb5 2.Qb
