Under the Stones Example 2
Keywords: Problem
I love this tesuji so much, that I can't resist the temptation to talk about some variations on the same idea. The only difference is the shape of the four sacrificed stones, which isn't square.
Black to kill.
would be a terrible blunder of course, since it would almost force White to live with
.
is the real suji here. White has no choice but to capture the four black stones with
to get a chance to make a second eye. But ...
... annihilates White's hope and the whole white group dies.