This shape is the bulky five, and it's unsettled. If white plays first:
White plays on the vital point and makes two eyes.
If black plays the vital point, the shape dies. It is dead because black can almost fill with the squared four.
here is atari. If white captures:
A dead shape is left behind. Any play by white before only leaves a smaller dead shape, as you can verify.
Referenced byIntroExercise10