Ca ssa Britannia, originally known as British Chess, is based on an idea Fergus Duniho had in 2001 to create a British themed Chess variant with Lions, Unicorns, Dragons, and a royal Queen. Lions, Unicorns, and Dragons are respectively the heraldic animals for England, Scotland, and Wales. The Queen is the royal piece, because at the time of the game's creation the British monarch was a Queen.

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