Colour-switched moves

In the twin, the colour of a piece is changed, and the same moves are then made by a piece of the same type of the opposite colour.

Abdurahmanović, Fadil

Kalkavouras, Ioannis

Problem Paradise, 2015

1st Prize

Example: Colour-switched moves
h#4 b) wBe7↔bBh4  (3+10)

a) 1.Rc4 Bd8+ 2.Kc5 Bc7 3.Be1 Bb8 4.Bb4 Ba7#
b) 1.Bd8 Ke8 2.Bc7 Kd7 3.Bb8 Kc8 4.Ba7 Bd8#

View in Helpmate Analyzer

FEN: 6n1/4BK2/pkpp4/2rr4/P4n1b/3p4/8/8

External links:

Shorokhov, Boris

10th FIDE World Cup, 2022

4th Prize

Example: Colour-switched moves
h#4 b) wRa7  (5+15)

a) 1.Ra8 Sxe6 2.Rh8 Sxd4 3.Rh1 Sb5 4.Ra1 Sc3#
b) 1.Sxf8 Ra8 2.Se6 Rh8 3.Qb4 Rh1 4.Ka3 Ra1#

View in Helpmate Analyzer

FEN: 5N2/r1pb1p2/Pbp1nPp1/p1p5/P2p4/qp6/kn2K3/8

External links:

Semenenko, Valery

U.Degener-64 & M.Degenkolbe-60 JT, 2024

3rd Prize

Example: Colour-switched moves
h#5 b) wBb7  (2+13)

a) 1.Bc8 Kxg2 2.Bd7 Kf1 3.Be8 Ke2 4.Bg6 Ke3 5.Be4 dxe4#
b) 1.c3 Bc8 2.c2 Bd7 3.c1=S Be8 4.Sb3 Bg6 5.Sd4 Be4#

View in Helpmate Analyzer

FEN: 8/1b6/2ppp3/2rkn3/2p3pp/3P2pr/6p1/6K1

External links: