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, 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.
Optional local KataGo
The stronger optional AI uses a KataGo model downloaded to and run locally in the browser. 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.