A board for playing the 11th century Middle-Eastern game of Alquerque, or Qirkat, a game that preceded checkers. Brought to Spain by the Moors in the 13th C.
Attested period artifact, but not used in any period armory, nor yet registered in the SCA.
The lines must contrast with the board to be visible, and are blazoned separately, “an alquerque board tincture marked tincture.”
Source: Pennsic Traceable Art. Artist unknown. Adapted by Mathghamhain Ua Ruadháin.