A move which enables a tempo move.
See also: Tempo move.
Kricheli, Josif
Sahs/Shakhmaty (Riga), 1964
2nd HM
1.Sd6
Rc1
2.Bd3
Sf4#
1.Re3
Kg1
2.Se5
Se7#
Feather, Christopher John
Best Problems, 2007
1st Prize
1...Bb5
2.Rg8
fxg8=S
3.axb5
Sxe7#
1...Rf6
2.Re8
fxe8=S
3.exf6
Sc7#
Jones, Christopher James Austin
Orbit, 2002
2nd Prize
1.Sf1
Kg1
2.Sxh2
Kf2
3.Sf3
Ke3
4.Sd2
Kd4
5.Sb3+
Kxc4
6.h2
cxb3#
Feather, Christopher John
Broodings, 2005
1.d1=R
Sg3
2.Rd2
Sxe4
3.Rg2
Sd2
4.Kg3
e4
5.Kh2
Sf1#
Turevsky, Dmitry
Shorokhov, Boris
KoBulChess, 2013
4th Prize
1.Bb3
Ke4
2.Bxa4
Kd5
3.Bb3+
Kc6
4.Ke8
Ba4
5.Bf7
Kc7#
Hernitz, Zvonimir
Wola Gulowska, 1995
1st Prize
1.Sxf4
Kg1
2.Sd5
Sc5#
1.Rxd3
c3
2.Rd5
Sg5#
1.Qxf3
Kh2
2.Qd5
f5#
Jonsson, Bernt Christer
Australasian Chess, 2012
1.Sxd2
Sf4
2.Sb1
Sd2
3.gxf4
Sb3#
1.Sxb4
Sg3
2.Sa2
Sb4
3.hxg3
Sc2#
II) B-W: Black allows a white tempo at B1.