DEFINITIONS

A group is a set of orthogonally adjacent, like-colored stones. A liberty of a group is an empty point orthogonally adjacent to that group.

PLAY

There are two players: Black and White. Black plays first, then turns alternate. On his turn, a player must place a stone of his color on an empty point of the board. At the end of a turn, all groups on the board (both friendly and enemy) must have at least one liberty. Otherwise the player's move is illegal. Whoever can't make a move on his turn loses.

NOTES

You can place blocks with the board edit option to change the size and shape of the board. 6x7 boards have been used in some human matches. As always, right clicking with C key down copies a piece, and right clicking with V key down pastes it. If you then drag the mouse, you can paste onto multiple positions.