5五将棋

Minishogi is a modern variant of shogi. The rules are very similar to those of standard shogi, with few exceptions:

• 5x5 board
• Different board setup with reduced number of pieces
• Promotion zone is only the farthest rank in opponent's territory.
• Repetition doesn't result in a draw, but in a loss of the player who moved first in the game (no matter who started the repetition)

See wiki article for more details.