A piece plays to a square behind another unit so as to exploit the line-opening resulting from that unit’s move.
See also: Kluver 10 theme.
Feather, Christopher John
Schach-Aktiv, 1991
1.Kd4
Bb8
2.Rc2
Rxd3#
1.Kc4
Rb8
2.Bg1
Bxd3#
Paliulionis, Viktoras
Match Latvia-Lithuania-Leningrad, 1986
1st-2nd Prize
a) 1.Qc5+
Sd5
2.Qa3
Sb6#
b) 1.Qe3+
Be4
2.Qa3
Bc6#
Abdurahmanović, Fadil
The Problemist, 1990
1st Prize
1.Kf5
Qa5
2.Sg4
Bd3#
1.Kd6
Rd1
2.Bg2
Bb4#
Myllyniemi, Matti Arvo
Tidskrift för Schack, 1979
a) 1.Ke3
Qxe6
2.Bf4
Sxc4#
b) 1.Kxf3
Qc6
2.Rf4
Rxd3#
c) 1.Kf5
Qb5
2.Sf4
Sd6#
Paliulionis, Viktoras
harmonie-aktiv, 2013
1st HM
1...Bc2
2.d5
Bg6
3.Re7
Be8
4.Re1
Kc7
5.Kf3
Kd6
6.Ke2
Ke5
7.Kd1+
Kd4
8.Qe2
Kc3
9.d4+
Kb3
10.d3
Ba4
11.d2
Kb2#
Páros, György
Fleck, Ferenc
O. Bláthy MT, 1940
1st-3rd Prize
1.Rg5
Bh4
2.Qg4
Bxh3
3.Qg2
Bxd7
4.Rg3
Bd8#
Meinking, Dan
StrateGems, 2001
1st Prize
1.Qxg3
Ba2
2.Qg8
Rg6
3.Qxb3
Rc6
4.Qg8
Bd5
5.Qb8
Ra6#
1.Qxc2
Rh1
2.Qh7
Bg6
3.Qxh3
Be8
4.Qd7
Rh8
5.Qa7
Bc6#