Transcendental Chess of one side can be any of 4²×6!÷2² = 2880. There is no castling. On the first turn a player, instead of making a move, can transpose any of two pieces on the back row. In Chess960 the back rows are mirror images, but in Transcendental Chess the setup of black and white is different 2879 out of every 2880 times (there being a 1–in–2880 chance that both sides will draw the same setup). This can create inequalities in the position. One way to equalize these inequalities is to play a couplet: the players play two games, one each as
Portal Chess starting location of these portals can be different when the game begins, but the image shows the standard set-up. In this game the portal pieces move around by very specific rules. This version of the game has "player-controlled portals", which are linked to each other. The rules for these portals are worked out as though they make the squares they cover into one square. In the set up to the right, a5 and e4 can be conceptualized as the same square. The specific rules for portal use are as follows: Portal Chess Portal Chess is a chess variant which uses