- ('Switching', 'Exchange pieces positions'),
- ('Upsidedown', 'Head upside down'),
+ ('Perfect', 'Powerful pieces'),
+ ('Racingkings', 'Kings cross the 8x8 board'),
+ ('Rifle', 'Shoot pieces'),
+ ('Recycle', 'Reuse pieces'),
+ ('Royalrace', 'Kings cross the 11x11 board'),
+ ('Rugby', 'Transform an essay'),
+ ('Shatranj', 'Ancient rules'),
+ ('Suicide', 'Lose all pieces'),
+ ('Suction', 'Attract opposite king'),
+ ('Threechecks', 'Give three checks'),
+ ('Twokings', 'Two kings'),
+ ('Upsidedown', 'Board upside down'),