Survival of Live Groups in the game of Go
A group with two true eyes (not &quot;false eyes&quot;) is and remains alive even if surrounded by the other player, and cannot be captured by an sequence of moves by the other player. That is what being a &quot;living group&quot; means.

An invading stone that is not able to be included in a living group will be considered dead at the end of the game, and its stone will be treated as having been captured. If black invades a white group and white must answer each move to prevent black from creating a living group, then the net score will be unchanged. If white can safely leave black's plays unanswered without black being able to form a living group, black will lose a point for each such move. But if white is in error and black can make a living group, or cut off a white group and connect to a living group, black will make significant profit.


If the players do not agree on whether a group is alive or not, play is not over; if the disagreement is only discovered while scoring, play is resumed to settle the status of the group(s) in question.