emmett: What is the GNU Shogi manual? Is it on line? AND have you taken a look at Tai Shogi? The board is 25x25 with a total of 354 pieces. There is some suggestion that an even larger form of Shogi once existed called "Tai-Kyoku" where the board size was thought to be 36x36! A game with those porportions might take weeks or even months to finish. Maybe we shogi players should revive these games and make them team sports!