LUDUS: Dai dai Shogi 大大将棋

Dai dai shōgi (大大将棋 'huge chess') is a large board variant of shogi (Japanese chess). The game dates back to the 15th century and is based on the earlier dai shogi. Apart from its size, the major difference is in the range of the pieces and the “promotion by capture” rule. It is the smallest board variant to use this rule.