('Checkless', 'No-check mode'),
('Chess960', 'Standard rules'),
('Circular', 'Run forward'),
('Colorbound', 'The colorbound clobberers'),
('Coregal', 'Two royal pieces'),
('Checkless', 'No-check mode'),
('Chess960', 'Standard rules'),
('Circular', 'Run forward'),
('Colorbound', 'The colorbound clobberers'),
('Coregal', 'Two royal pieces'),