Correct answer: O-O-O1...B:b4+ 2.a:b4# 1...Bb6/Nf2/Nf6/Ng3/Ng5/Nd2/Nd6/Nc3/Nc5 2.N:b6# 1...B:c7 2.N:c7# 1...Ne6/Nf7/Nc6/Nb7 2
