Weiqi Go is made by Ply Yard. Open it on a phone or computer to play on 9x9, 13x13, or 19x19 boards without creating an account.
What you can do here
Play local AI in your browser as Black or White, share one device for a face-to-face game, or create and join shared online rooms.
Where games are stored
Local AI and shared-device games are saved in your browser by mode and board size. Shared-room play keeps only the room information needed to reconnect; it does not create a username-and-password account.
What this is not
There are no rankings, ratings, automated matchmaking, or tournament claims. It is a free board for everyday practice and play.
Local KataGo
Every vs-AI level uses a KataGo model downloaded to and run locally in the browser. The strong and master levels load larger nets on first use. It is for practice, not a professional rating or coaching service.
Open-source credits
The board includes open-source work from KataGo and web-katrain under their respective MIT licences. Their full attribution and licence notices remain available in the Chinese version of this page while the English notice is being consolidated.
