1. Qxc4? [2. Qb5 [C] , Qd5[B]#]
1. ... Qf4!

1. Qd1? [2. Qd5[B]#]
1. ... Qd7 [a] /e5 [b] 2. Q(x)d7 [A] #
1. ... Qd6 [b] 2. Qxd6 [D] #
1. ... Qd8 2. exd8S#
1. ... Bd2 2. Qh1#
1. ... Bf7!

1. Qb1! [2. Qb5 [A] #]
1. ... Qb7 2. Qxb7#
1. ... Qb6 2. Qxb6#
1. ... Qb8 2. axb8S#
1. ... Bb4 2. Qh1#