Connect-and-die pyramid four gives one eye in gote
Keywords: Life & Death, Tesuji
The technique of throwing in at then give atari at 3 is well known. White has to connect at
with
.
captures four stones in the shape of a pyramid four. However, only in the right diagram this suffices for life ...
In the left diagram, Black has to play both a and b after White has occupied the vital point of . On the right, White a will be answered by Black b.