Basic living eye shapes
The discussions on living eye shapes assume that the group is surrounded. Corner shapes often behave differently.
Four-point eye shapes
In general there are five different four-point eye-shapes. Three of them, the straight four, the bent four and the twisted four are living shapes (no further play necessary). The status of the pyramid four depends on sente and the squared four (tombstone) is dead as it stands.
Six-point eye shapes
All six-point eye shapes (including rectangular six) are unconditionally alive except for the rabbitty six.
Seven-points eye shapes
All eye shapes of seven points are alive.
This shape (butterfly seven) is one that seems most likely to be killed, but after the position is seki.
Eight-points eye shapes
Eight-point eye shapes are unconditionally alive.