-Full detection of repeated positions (including turn)
-In UltimaChess, consider these rules modifications: http://www.inference.org.uk/mackay/ultima/ultima.html
+Chakart :)
+Checkered1 & 2 --> avec switch, coup roi sur roi.
+Ambiguous chess
+https://www.chessvariants.com/mvopponent.dir/ambiguous-chess.html
+[Sittuyin (burmese chess) --> probably not]