White makes all his moves by a single Knight. No less than four moves are required.
Luce, Sébastien
Die Schwalbe, TT-214, 2019
2nd HM
1...Sf6
2.Sg5
Sxh5
3.Kf3
Sf4
4.Kg4
Sd5
5.Kh5
Sf6#
1...Sc7
2.Kd3
Sxa6
3.Kc4
Sb4
4.Kb5
Sd5
5.Ka6
Sc7#