I was wondering if ther were other "li____.org"s
litafl.com/tafl
Also, if you want to experience the thrill of different chess variants, then gridgrove.gg/play
I recently created a variant of Tsuitate Shogi (ついたて将棋) for standard chess:
www.chess.com/blog/Pokshtya/yuurei-chesu-chess-with-invisible-pieces
Enjoy!