chu shogi
A large-board shogi variant played on a 12×12 board with many pieces. A historical game, not the standard modern shogi.
Chu shogi is a type of shogi played on a 12×12 board.
From 中 (ちゅう, 'middle') + 将棋 (しょうぎ, 'shogi'), referring to its size between smaller and larger historical shogi variants.