('Berolina', 'Pawns move diagonally'),
('Checkered', 'Shared pieces'),
('Chess960', 'Standard rules'),
+ ('Circular', 'Run forward'),
('Crazyhouse', 'Captures reborn'),
+ ('Cylinder', 'Neverending rows'),
('Dark', 'In the shadow'),
('Enpassant', 'Capture en passant'),
('Extinction', 'Capture all of a kind'),
('Losers', 'Lose all pieces'),
('Magnetic', 'Laws of attraction'),
('Marseille', 'Move twice'),
+ ('Royalrace', 'King crosses the board'),
('Recycle', 'Reuse pieces'),
('Suction', 'Attract opposite king'),
('Upsidedown', 'Board upside down'),