Gomoku Arena

A Game My Grandmother Gave Me

When I was six years old, my Taiwanese grandmother sat me down at her Go board and taught me gomoku. Go itself was beyond me at the time, but gomoku wasn't. I already understood Connect 4, so the basic idea clicked immediately. But this was something richer: five in a row instead of four, pieces placed anywhere on a vast grid rather than falling by gravity, and new dimensions of strategic depth I was only beginning to sense.

What I remember most vividly is the feel of the stones, cool and smooth between my fingers, with a satisfying click against the wooden board. I picked up the strategy quickly. By the time summer came, I was spending long afternoons beating my grandmother at her own game. In retrospect, I wonder if she was letting me win. Bless her soul.

I am building Gomoku Arena because I want to spread the beauty of this simple game, and connect it back to its origins and my heritage. The elegance of 五子棋 deserves a home that honors where it came from.

About the Game

Gomoku has been played in China and Japan for over a thousand years. The name comes from the Japanese gomoku narabe (五目並べ), "five pieces in a row." Two players alternate placing stones on a 15×15 grid; the first to align five stones horizontally, vertically, or diagonally wins.

Deceptively simple, yet endlessly deep. Gomoku rewards pattern recognition, forward planning, and the ability to hold two threats in mind at once. The best players think several moves ahead while setting traps the opponent doesn't see coming.

About This Site

Gomoku Arena is a free, browser-based implementation of the game, no account, no downloads, no clutter. Just the board, your stones, and an AI opponent ready to challenge you. The aesthetic is inspired by traditional ink-and-seal art: clean, deliberate, rooted in the same East Asian visual culture the game comes from.

The entire game runs in your browser, your stats are saved locally, nothing is sent to a server. You can even add it to your phone's home screen for an app-like experience.

Difficulty Levels

Easy. The AI plays plausibly but makes strategic mistakes. A good starting point if you're new to Gomoku.

Medium. The AI prioritizes strong moves more consistently and is harder to outmaneuver.

Hard. The AI nearly always chooses the best available move. It will punish overconfidence.

All levels will always block your four-in-a-row and take an immediate win when available, there are no cheap victories here.

What's Coming

Online multiplayer is on the roadmap, along with strategy guides, a daily challenge mode, and a global leaderboard. The game is actively being developed, if you have feedback or suggestions, we'd love to hear from you.