-https://www.chessvariants.com/other.dir/fugue.html
-https://www.chessvariants.com/rules/spartan-chess
-https://www.chessvariants.com/mvopponent.dir/avalanche.html
-https://www.chessvariants.com/mvopponent.dir/hypnotic-chess.html
-https://www.chessvariants.com/mvopponent.dir/mesmer-chess.html
-
-Squatter Chess: safe on last rank = win
-Companion Chess : pieces of same nature don't attack each others
-Crossing Chess = win when the king cross half-board
-Crown Chess: place all units on move 1 (similar to Sittuyin, more freely --> in own half-board, possible pawns on 1st rank)
-Medusa Chess = Isardam
---> à chaque déplacement, check attaques directes + découvertes autour de case de départ dans 8 directions (pas caval)
-
-Kingmaker: pawns can promote also into enemy king
---> no king tracking, getCheckSquares + underCheck test all kings
+NEW VARIANTS:
+http://history.chess.free.fr/rollerball.htm
+ https://www.chessvariants.com/40.dir/rollerball/index.html