Bulky Seven
Keywords: Life & Death, Shape
Found in Lessons In The Fundamentals of Go written by Kageyama Toshiro.
"Even those who have heard of the bulky five have not heard of a bulky seven, but here it is, and White can kill it.
strikes at the center of Black's shape, and Black is already dead. If he plays
at
, he cannot do anything after White a. If White played
at
, then
at
,
at
, Black a would mean a ko, and a white failure."
Zarlan: Note that this only works because the black group isn't solidly connected: