Set:

 1...Ke4 2.Sb5  Kxe5 3.Rxe6# (A),

 1...Kxe5 2.Rxe6+ (A) Kd4 3.Sf5#.

 1.Rf1! -zz,

 1...Ke4 2.Re1+ (B) Kd4 3.Sxe6#,

 1...Kxe5 2.Sb5 Ke4 3.Re1# (B).

Change of play,change of White's moves' functions (Rxe6&Re1).