Solal35 #2King of hill: http://fr.lichess.org/king-of-the-hillChess960: en.m.wikipedia.org/wiki/Chess960Antichess: http://en.m.wikipedia.org/wiki/Losing_chessAtomic: http://www.freechess.org/Help/HelpFiles/atomic.htmlTree-check: http://en.m.wikipedia.org/wiki/Three-check_chess