-https://www.pychess.org/variant/shogun
-https://www.chessvariants.com/incinf.dir/bario.html
- https://www.chessvariants.com/index/listcomments.php?order=DESC&itemid=Bario
- https://www.bario-chess-checkers-chessphotography-spaceart.de/
- https://le-cdn.website-editor.net/20ef5f800ea646c29f6852cfc5ceda07/dms3rep/multi/opt/BAR028-e15a849c-960w.jpg
+Merge variants 1, 2 (3) into one with sub-variant selection when starting a game (New Game + vs engine + analyse)
+E.g. Checkered 1 & 2 into one, and so on.
+Need additional field in variant code... in a generic way (radiobutton or select or checkbox?)