The two-stone edge squeeze tesuji is commonly used in capturing races and can occur not just in the corner, but also anywhere on the edge. Also known as stone monument tesuji or stone tower tesuji (石塔 in Chinese). The Chinese also call this "大头鬼" (literally translated as "big-headed ghost").
See also race to capture in the corner.
White to save his group.
and
form the first part of the two-stone edge squeeze tesuji. Note that
is forced, as atari from the other direction leads to the capture of one of the two groups cut apart.
also prevents the atari at a.
The throw-in at , which is the second part of this tesuji, forces the capture at
.
forces Black to connect.
After , it's me ari me nashi. White wins the semeai.
This particular position is also known as the two-stone corner squeeze.
In this capturing race, is necessary to reduce White's liberties. The first part of the two-stone edge squeeze tesuji is the descent at
.
The next part of this tesuji is the throw-in at . In this position
is yet another good move, if
prevents the atari,
wins the capturing race.
Depending on the condition on the left side, one might argue that is a better move. But it does not change the fact that
and
capture the key stones.
is too slack. Up to
, White wins the capturing race by one move.
Authors: Charles Matthews, HolIgor, unkx80, Dan Schmidt, Kris Rhodes, Bass, Chris Hayashida.
Edited by unkx80 on 2003 October 17 and 2003 December 28.