An officer (queen, rook, bishop, or knight) makes three or more moves in the same phase.
Kirtley, Mark
U.S. Problem Bulletin, 1997
1st-2nd Prize
a) 1...Sa5
2.Rb5
Sxb3
3.Qc2+
Sd2
4.Qa4
Sf3
5.Ka5
Se5
6.Bb6
Sc6#
b) 1...Se7
2.Ka5
Sxg6
3.Bb6
Sh4
4.Qe4+
Sf3
5.Qa4
Sd4
6.Rb5
Sc6#
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#