Critical move
A line-piece moves across a square (the critical square), on which it is interfered by another piece occupying this square.
See also: Anti-critical move; Indian; Maslar theme; Cheney-Loyd theme.
Loyd, Samuel
The Chess Monthly, 1860 (v)
h#3 (3+2)
1.Kf6
Ra8
2.Kg7
Bb8
3.Kh8
Be5#
Maslar, Zdravko
feenschach, 1986
2nd HM
h#3 2.1... (5+4)
1.Sb4
Ra1
2.Sa2
Bc6+
3.Ka6
Rxa2#
1.Bh3
Bh1
2.Bg2
Ra5+
3.Kc6
Bxg2#
Abdurahmanović, Fadil
Ellinghoven, Bernd
idee & form, 2000
2nd Prize
h#5 (2+4)
1.Ba2
Sb3
2.Kf8
Kxe6
3.e1=R+
Kf6
4.Re8
Sc5
5.Bg8
Sd7#