Whose birthday is it today?
a) 1.Kf4 Sxd5+ 2.Ke4 Sxe7 3.Bd6 Sg8 4.Kd5 Sf6# b) 1.e4 Bxd4 2.Kf4 Bc5 3.Ke5 Bxe7 4.Kd4 Bf6# c) 1.Kg4 Rxe6 2.Kf5 Rxe7 3.Kg6 Rf7 4.Kh6 Rf6#