1.Bg2-d5 ? threat: 2.Kg3-g2 # 2.Kg3-f3 # 2.Sc3-e4 # but 1...Sf8-e6 ! {Since Bg2 doesn’t cross square g2, 2.Kg2# isn’t a MAB effect.} 1.Bg2-e4 ? threat: 2.Kg3-g2 # 2.Kg3-f3 # but 1...g5-g4 ! 1.Bg2-f3 ? threat: 2.Kg3-g2 # 1...Sf8-d7 2.Re7-e6 # 1...Sf8-e6 2.Qc4*e6 # but 1...Sc2-e3 !
1.Qc4-b5 ! threat: 2.Qb5-e5 # 1...Ba8-f3 2.Kg3*f3 # {(2.Qe5? Kc6!)} 1...Ba8-e4 2.Sc3*e4 # (2.Qe5? Kc6!)