A piece captures an enemy piece and moves away, thus allowing another enemy piece to move to the vacated square.
See also: Annihilation; Unblocking sacrifice.
Alias: Square-clearance [FIDE Album].
Jonsson, Bernt Christer
Australasian Chess, 2012
1.Sxd2
Sf4
2.Sb1
Sd2
3.gxf4
Sb3#
1.Sxb4
Sg3
2.Sa2
Sb4
3.hxg3
Sc2#
Abdurahmanović, Fadil
Die Schwalbe, 1962 (v)
Prize
1...Sxa4
2.b5
Sb6
3.Kb3
Sd7
4.Ka4
Sc5#
1.Kb1
Bxd4
2.Kc2
Be3
3.Kc3
Bc1
4.Kd4
Bb2#