('Bishopawns', 'Bishop versus pawns'),
('Cannibal', 'Capture powers'),
('Capture', 'Mandatory captures'),
+ ('Castle', 'Win by castling long'),
('Checkered1', 'Shared pieces (v1)'),
('Checkered2', 'Shared pieces (v2)'),
('Checkless', 'No-check mode'),
('Threechecks', 'Give three checks'),
('Twokings', 'Two kings'),
('Upsidedown', 'Board upside down'),
+ ('Vchess', 'Pawns capture backward'),
('Wildebeest', 'Balanced sliders & leapers'),
('Wormhole', 'Squares disappear'),
('Zen', 'Reverse captures');