Also available at rengo.xrop.me

See the original blog post.

Go for more than two players

Rengo is a version of Go that can be played with four players. In this rendition of Rengo, any number of players can join a room at once to play.

Rules

The rules are the same as in regular Go. There are two teams: white and black. Players will be alternatey assigned to teams as they join. A player can quit out of the game. However, there is also a pass button to simulate passing in other Go games, where a player can decide to skip their turn. If all players skip their turn, then the game ends. A player who has just passed is denoted with their row being completely red.