('Doublemove2', 'Double moves (v2)'),
('Dynamo', 'Push and pull'),
('Eightpieces', 'Each piece is unique'),
+ ('Empire', 'Empire versus Kingdom'),
('Enpassant', 'Capture en passant'),
('Evolution', 'Faster development'),
('Extinction', 'Capture all of a kind'),
('Makruk', 'Thai Chess'),
('Maxima', 'Occupy the enemy palace'),
('Minishogi', 'Shogi 5 x 5'),
+ ('Minixiangqi', 'Xiangqi 7 x 7'),
('Monochrome', 'All of the same color'),
('Monster', 'White move twice'),
('Omega', 'A wizard in the corner'),
('Suction', 'Attract opposite king'),
('Swap', 'Dangerous captures'),
('Switching', 'Exchange pieces'' positions'),
+ ('Synochess', 'Dynasty versus Kingdom'),
('Takenmake', 'Prolongated captures'),
('Teleport', 'Reposition pieces'),
('Tencubed', 'Four new pieces'),