153-Mate in two solution.

Solution: 1. Qg6! [threats 2. Qe6#]
 1... Sxd6 2. Qxd6#
 1... Bf6, Re7 2. Q(x)f6#
 1... Bxg4 2. Sxg4#
 1... Bxg6 2. Sxg6#