Correct answer: Ba81...a4 2.K:b4# 1...b3 2.Kc3# 1...Nb3/Nc2 2.K:b3# 1.Qg2?? (2.Qb7#/Qa8#) 1...a4 2.Qa8# 1...Nc6 2.Q:c6# 1...Nc8 2.Qb7#
