Orthogonal-diagonal transformation
A theme framework, in which the strategic effects that take place on orthogonal lines in on phase are shown again in another, but changed to occur on diagonal lines, and vice versa.
See also: Analogy.
Alias: ODT; Diagonal/orthogonal correspondence.
Kirtley, Mark
The Problemist, 1988
1st HM
1.Bh7
Bd8
2.Rg6
Re2#
1.Rh6
Rf2
2.Bg6
Bc7#
Feather, Christopher John
Schach-Aktiv, 1991
1.Kd4
Bb8
2.Rc2
Rxd3#
1.Kc4
Rb8
2.Bg1
Bxd3#
Moen, Kabe
The Problemist Supplement, 2019
a) 1.Re5
Bh7
2.Sc5
Bd3
3.Sde6
Be4#
b) 1.Bd6
Rf1
2.Sc6
Rf7
3.Sed4
Rf5#
Feather, Christopher John
Schach-Echo, 1976
1.Qxb6
Rc1
2.Kd4
Qxd2#
1.Qxc6
Bg1
2.Kc4
Qb3#
Pachl, Franz
Schach, 1982
1.Bxf4+
Kg6
2.Bd6
Re3#
1.Rxe6+
Kg5
2.Re3
Bd6#
Abdurahmanović, Fadil
Magyar Sakkelet, 1979
1.Ba7
Bxh6
2.Rd4
Se3#
1.Rd1
Rxh6
2.Bd4
Sd6#
Visserman, Eeltje
Sahs/Shakhmaty (Riga), 1965
2nd Prize
1.Bxb2+
Kf7
2.Bf6
Sd5#
1.Rxf4+
Kg7
2.Rf6
Sd1#
Feather, Christopher John
Moultings 5, 1991
1.Qxg8
Rf3
2.Ke6
Re2#
1.Qxf8
Bc4
2.Kf6
Bc3#
Jones, Christopher James Austin
Springaren, 2012
1st Prize
1.Kd5
f4
2.Rb6
Rc6
3.Bd4
Bxg2#
1.Kd6
d4
2.Bb7
Bc6
3.Rc7
Rxf6#