If ,
makes an eye in the stomach. If White does play inside the group, Black can fill all outside liberties and eventually atari at either a or c. If White next plays a or c, Black b makes a rabbitty six inside White's eyespace.
If here,
threatens to connect to the vital stone, next
almost fills with a bulky five.
here is also wrong.
forces
and then
occupies the vital point. Next, Black a doesn't create a killing shape.
Authors: Nando, Karl Knechtel, Dieter