九マス将棋

Enjoy Shogi more casually and smartly. "Nine-Square Shogi" is an app that lets you enjoy authentic Shogi on a compact 3x3 board. ■ Play Shogi Anywhere, One Game in Your Spare Time A condensed 3x3 board, a miniature version of the standard 9x9 board. While simple, it uses the same pieces as standard Shogi, such as the rook, bishop, gold general, silver general, and pawn, requiring serious reading and decision-making skills. Enjoy the thrill of Shogi quickly during your commute, school breaks, or any spare moment. ■ Fresh Games with Different Board Positions Every Time Each time you press the "Next Game" button, the AI ​​generates a new starting board position using a reverse-engineered algorithm. Because you start from a different board each time, you won't get bored of repeating the same game. ■ Beginner-Friendly Hint Function Tapping the "Hint" button displays movement direction markers (yellow dots) on all pieces on the board. You can learn how the pieces move while playing, making it ideal for those learning Shogi for the first time. ■ Check the Rules Anytime You can check the rules and operation methods anytime from the "Rules" button. Basic Shogi rules, such as forbidden moves (double pawn, checkmate by dropping a pawn) and draw by repetition, are explained clearly in Japanese and English. ■ AI that Balances Strength and Fairness A minimax AI using the Alpha-Beta method searches for the best move. The evaluation function considers the value of the pieces and the safety of the king, allowing you to enjoy a moderately challenging game. ■ Main Features ・Player vs. AI game on a 3x3 board ・Generates a different initial board position each time using a reverse-engineer algorithm ・"Undo" function to cancel the previous move (including the AI's response, up to 2 moves) ・Movement direction hint display (filled circle = 1 step move, outlined circle = long-distance slide) ・Display of rules and operation method dialogs ・Automatic switching between Japanese and English