-MarseilleChess: revise bot and test
-Translations (including About page), refresh rules
+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]