Gomoku
Build five on a 15×15 board, with a choice of starting player.
Runs in your browser — nothing is uploadedPreparing a local board…
Progress stays in this browser.
Tap controls, or use Tab and Enter. Arrow keys move between available grid squares; Escape clears selection. Scroll inside wide boards or increase zoom for larger targets. Local pass-and-play shares this screen.
How to use Gomoku
- Read the exact rules below and choose local or computer play. Changes to board size, starting player or seed count apply to New game.
- Use enabled board controls and turn actions. Tab and Enter work; arrows move between enabled grid squares.
- Undo for practice, pause the computer, or return directly to this route to restore your board.
Questions
Which Gomoku rules are used?
Freestyle Gomoku on a 15×15 board. Alternate placing one token in any empty square. Five or more in a horizontal, vertical or diagonal line wins; overlines are allowed. There are no Renju forbidden moves, swap openings or tournament balance rules. Choose the starting player before New game.
How does computer play work?
Opponents run only in a bounded local Web Worker. Checkers, Reversi, Four in a Row and Mancala use limited search; other games use simple legal heuristics or dice. Difficulty adjusts search depth where applicable, not dice odds. These are practice opponents, not expert play.
Can I play on a phone?
Yes. Tap enabled squares, tokens or turn actions. Wide boards scroll inside their play area; zoom enlarges small targets, and full screen has a visible exit. Player numbers and symbols accompany colors.
Will my game restore automatically?
Returning to this game restores its own validated browser-local board and recent undo history when storage is available. Normal games never open automatically from the homepage. Restart and New game ask before replacing unfinished progress. Clearing site data removes saves.
Is my board sent to a server?
No. Moves, dice history and saved boards stay on this device. No account, online session or upload is used. Analytics receives no board positions or game history.