The white queen is making every move for her side. No less than three moves are required.
See also: Crusader theme; Durbar theme.
Rotenberg, Jacques
Loustau, Jean-Marc
Phénix, 1992
2nd Prize
a) 1.Sd3
Qe6
2.Re3
Qxa6
3.R8e5
Qxc4#
b) 1.Se3
Qb5
2.Qd3
Qxe8
3.Bc4
Qxe5#
Meinking, Dan
Die Schwalbe, 2002
4th Prize
a)
1...Qxb2+
2.Ke6
Qxb5
3.Qf6
Qxd3
4.Re5
Qd7#
1...Qxb5+
2.Kd6
Qxb2
3.Rc5
Qg7
4.Qe5
Qd7#
b)
1...Qxb2+
2.Ke4
Qxb5
3.Qd4
Qh5
4.Re5
Qf3#
1...Qxb5+
2.Kf4
Qxb2
3.Rg5
Qb7
4.Qe5
Qf3#