Why CGS ?

Color Go Server, or CGS, is an Internet Go server enabling you to play against other players, worldwide, in real time and directly from your browser. Its main purpose is to facilitate Go discovery and learning, by updating its design and by adding some tools making the rules easier to understand.


In a game of Go, each stone has a certain influence on the board. This is very hard for a beginner to visualize on a traditional board. CGS points out territories by highlighting this influence.

CGS visuals show the territory and influence of each player on the Go board


The beginners who just started to play have difficulties to see Atari. In order to help them, CGS will highlight this situation by reducing the size of stones that have only one liberty left.

CGS highlights the situation in the game of Go where a stone or a group of stones have only one liberty left, also called as Atari


To help new players to avoid being in Atari, CGS offer an option to show the liberty count of each stones.

On CGS you can display the number of liberties each stone or group of stones have on the Go board


On CGS there is something for every taste! The player will be able to choose his preferred design among different themes while adjusting other parameters such as the intensity of the grid or the intensity of the influence...

You can customize your graphics on CGS, from the traditionnal Go theme, to playing with your own colors