166- SELFMATE in three SOLUTION.

Solution: 1. Ra1-c1! waiting
 1... c3-c2 2. Qh8-a1 waiting
    2... c4-c3 3. Rc1xe1 ... f2xe1=Q, f2xe1=R, f2xe1=B, f2xe1=S#

 White forces Black to give mate in 3 moves.