146-Mate in two solution

Solution: 1. Bg7xf6! waiting
 1... d7 ad lib 2. Qe7xe6#
 1... Qe6xe7 2. Bf6-d4#
 1... Qe6-e5 2. Qe7xe5#
 1... Qe6-e4 2. Qe7xe4#
 The aggressive key is justified by the self-pin theme