Grant Acedrex

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Grant Acedrex starting position. From left to right, back rank pieces are: rook, lion, unicornio, giraffe, crocodile, aanca, king, crocodile, giraffe, unicornio, lion, rook.

Grant Acedrex is a medieval chess variant dating back to the time of King Alfonso X of Castile. It appears in the Libro de los Juegos of 1283.