Skip to content
YiBoard
플레이
로그인 / 회원가입
Free · No account required
Global visits: —

Five stones in a line.
Three thousand years of arguing about it.

Start with Gomoku in five minutes. Stay for a thousand years of Chinese strategy. Open the board below and make a move — nothing to install, nothing to sign up for. Xiangqi and Go follow.

Start a matchPlay a friend

Your progress is saved to this browser for 180 days. Attach an email later if you want to keep it.

Your move

Black moves first. Get five in an unbroken line — horizontal, vertical or diagonal.

Players online

—
Total
—
vs engine
—
vs players

Three games, one board culture

Each one teaches a different way of thinking. We are shipping them in the order that gets you playing fastest.

Playable now

Gomoku

五子棋 · Wǔzǐqí

Two colours, one grid, five in a row. The rules fit in a sentence; the tactics do not. Best entry point if you have never touched a Chinese board game.

Start a match
Playable now

Xiangqi

象棋 · Xiàngqí

A river cuts the board in half. Cannons only capture by jumping over a screen. The two generals may never look at each other down an open file.

Play Xiangqi
Playable now

Go

围棋 · Wéiqí

You surround territory instead of capturing a king. Still played under essentially the same rules it had two millennia ago.

바둑 하기

Eighteen rungs, borrowed from the real thing

Chinese board culture ranks players in grades and dan, not in bronze and platinum. We kept that, and mapped it onto a rating that actually moves when you win.

Grades

  • Ninth Grade
  • Eighth Grade
  • Seventh Grade
  • Sixth Grade
  • Fifth Grade
  • Fourth Grade
  • Third Grade
  • Second Grade
  • First Grade

Ninth Grade up to First Grade. You are learning shapes.

Dan

  • First Dan
  • Second Dan
  • Third Dan
  • Fourth Dan
  • Fifth Dan
  • Sixth Dan
  • Seventh Dan
  • Eighth Dan
  • Ninth Dan

First Dan up to Ninth Dan. You are reading four moves ahead.

Everyone starts at 1200 — Sixth Grade.

What we actually built

Online games are refereed server-side

Every move in a friend match is validated by the server before it lands on either board. A patched client cannot invent a win.

The engine runs in your browser

Our Gomoku opponent searches with alpha-beta pruning under a hard 500 ms budget, on your machine. No round trip, no queue, no rate limit.

Written in four languages, not poured through a translator

English, Español, 日本語 and Português do Brasil. Rules, tooltips and error messages included — not just the marketing page.

Nothing behind a signup wall

Play, rank up, share a game. Attaching an email is optional and only exists so you can carry your record to another device.

The board is already open.

Pick a difficulty and go. It takes longer to read this sentence than to start.

Play Gomoku