In all phases, all moves are made by the same pieces in the same order, and pieces of each side must be of a different kind.
The theme was proposed by Abdelaziz Onkoud for the 5th Azemmour TT in 2017.
External link: Award-Dresde-2017.pdf.
Alias: Skewer theme.
Azemmour TT-5, Dresden, 2017
Yasinovataya TT-6, 2002