('Alice', 'Both sides of the mirror'),
('Allmate1', 'Mate any piece (v1)'),
('Allmate2', 'Mate any piece (v2)'),
+ ('Ambiguous', 'Play opponent''s pieces'),
('Antiking1', 'Keep antiking in check (v1)'),
('Antiking2', 'Keep antiking in check (v2)'),
('Antimatter', 'Dangerous collisions'),
('Berolina', 'Pawns move diagonally'),
('Cannibal', 'Capture powers'),
('Capture', 'Mandatory captures'),
- ('Checkered', 'Shared pieces'),
+ ('Checkered1', 'Shared pieces (v1)'),
+ ('Checkered2', 'Shared pieces (v2)'),
('Checkless', 'No-check mode'),
('Chess960', 'Standard rules'),
('Circular', 'Run forward'),