('Crazyhouse', 'Captures reborn'),
('Cylinder', 'Neverending rows'),
('Doublearmy', '64 pieces on the board'),
+ ('Doublemove1', 'Double moves (v1)'),
+ ('Doublemove2', 'Double moves (v2)'),
('Dynamo', 'Push and pull'),
('Eightpieces', 'Each piece is unique'),
('Enpassant', 'Capture en passant'),
('Knightrelay2', 'Move like a knight (v2)'),
('Losers', 'Get strong at self-mate'),
('Magnetic', 'Laws of attraction'),
- ('Marseille', 'Double moves'),
('Maxima', 'Occupy the enemy palace'),
('Monster', 'White move twice'),
('Omega', 'A wizard in the corner'),
('Rugby', 'Transform an essay'),
('Schess', 'Seirawan-Harper Chess'),
('Shatranj', 'Ancient rules'),
+ ('Sittuyin', 'Burmese chess'),
('Suicide', 'Lose all pieces'),
('Suction', 'Attract opposite king'),
('Takenmake', 'Prolongated captures'),