A piece moves along the line toward another piece closing its line of action.
See also: Bristol.
Petkov, Petko A.
Shakhmatna Misl, 1979
1st Prize
1.Bd5
Re2
2.dxe2
Bd4#
1.Qc4
Be3
2.fxe3
Rh2#
Abdurahmanović, Fadil
Schach-Echo, 1980 (v)
4th HM
1.Se3
Sxf3+
2.Qe5
Rd4#
1.Sd4
Sc4+
2.R1e5
Se3#
1.Se7
Sd7+
2.Be5
Sf6#
1.Sf6
Sxc6+
2.R8e5
Se7#