|Table of contents
|Table of diagrams
Two white groups are alive
Black cuts, White makes a second eye
Black makes the eye false, White connects
Being alive is one possible status of a group, as opposed to being dead; in-between groups are called unsettled, or in more open positions groups that are not clearly alive may be described as weak groups.
For example, the following black group in the corner is alive with two eyes which make points of territory.
Alive is a property of a string or a group of strings if one of the following aspects applies:
- Currently the string is uncapturable, or capturable but belongs to an alive group.
- Currently not all of the group's strings can be captured in alternating play when the opponent plays first.
- The rule set in use defines the term and it applies during scoring.
All types of life of strings are classified as follows:
- it belongs to an independent life group or
- it is one of the following:
It is equivalent to characterise independent life by transformation to two-eye-formation or by the three types of capturability . The latter cover all live groups, regardless whether independent life  or seki.
There are several ways in which a group can 'live':
- it is independent life so has or can make two eyes;
- it lives in seki; 
- it is pass-alive, i.e. cannot be captured however often the defender passes;
Tactics for making live groups can combine threats: to make an eye, or to connect.
In this example the right-hand white group is alive in the strict sense, with two completely explicit eyes. The following diagram shows that the left-hand white group is also alive in alternating play. The right hand group is of some help for that.
White can answer with for two eyes.
here makes a false eye shape, but once White plays all White's stones form one safe, live group.
 That is, the group as a whole isn't one that the opponent, with the move, can forcibly capture. Stones within it may be captured.
 A group that does not obviously have two eyes, or is not clearly in seki, is still alive if it is guaranteed to be able to get two eyes or make seki, regardless of who plays first. By this extended definition, groups that seem to be alive, or are alive can die if a player is negligent. See pass-alive, also ambiguously called unconditional life.
 Depending on the rules, a seki can also contain some dead stones neither player wants to remove.
 Depending on the rules, the ko stones of a disturbing life are either alive or dead.
 Also called two-eye-alive group.
- The Eyes Collection.