Correct answer: Rb21.Nc1?? (2.Nb3#) but 1...Bc2+! 1.Qg2?? (2.Qg7#/Qb2#) 1...Bd3/Be4/Bf5/Bg6/Bh7 2.Qb2# 1...B:a2 2.Qb2#/Q:a2# b
