Minishogi (5五将棋) is a variant of shogi (Japanese chess). The rules are identical to those of standard shogi, except that it is played on a 5x5 board, with the initial position as shown in the diagram, and each player's promotion zone consists only of the rank furthest from the player.
Website of the Japanese Minishogi Association (http://www.geocities.co.jp/Playtown-Spade/8662/) (in Japanese, but contains game records which can be understood without knowing Japanese)
