('Interweave', 'Interweaved colorbound teams'),
('Isardam', 'No paralyzed pieces'),
('Janggi', 'Korean Chess'),
+ ('Joker', 'Replace pieces'),
('Kinglet', 'Protect your pawns'),
('Kingsmaker', 'Promote into kings'),
('Knightmate', 'Mate the knight'),
('Shatranj', 'Ancient rules'),
('Shogi', 'Japanese Chess'),
('Sittuyin', 'Burmese Chess'),
+ ('Spartan', 'Spartan versus Persians'),
('Squatter', 'Squat last rank'),
('Suicide', 'Lose all pieces'),
('Suction', 'Attract opposite king'),