131-SELFMATE SOLUTION.

Solution: 1. Sxh4! [2. Sg2 waiting
    2... g4 3. fxg4 ... Se8, Se6, Sf5, Sxh5#]
 1... gxh4 2. f4 waiting
    2... h3 3. Bh2 ... Se8, Se6, Sf5, Sxh5#
White moves and forces Black to mate White in three moves.