An aerial cycle (rundlauf), each move of which can be replaced by null-moves without affecting the solution. This is a special case of a tempo maneuver.
See also: Tempo maneuver; Areal cycle.
Linss, Torsten
Paliulionis, Viktoras
Die Schwalbe, 2020
1st Prize
1...Bh4
2.Kd6
Bd8
3.g5
Ba5
4.g4
Bd2
5.Bg5
Be3
6.Rf5
Bf2
7.Ke5
Bh4
8.Kf4
Kf2
9.Re4
Bg3#