Atekomi

    Keywords: Tesuji, Shape, Go term

Chinese: 挤 (擠) jǐ
Japanese: 当て込み or アテコミ (atekomi)
Korean:

Atekomi is a play that wedges into a diagonal play (kosumi). It creates a cutting point for the opponent's diagonal. (But that is not necessarily what it threatens.)

[Diagram]
Atekomi  

So B1 here is atekomi (something like "aim inside"). There are typically supporting stones nearby.

In English atekomi has also been called an angle wedge play. With a supporting stone at a Jared proposed the name Kosumi Cut, because the cutting stone is a kosumi and because it cuts opponent's kosumi.

There are some cases where atekomi is a hard-to-find tesuji. White can simply connect as an answer, so the tesuji usually has other aims in addition to separating the two stones, as in the examples below.

Example 1

[Diagram]
White to capture marked stones  
[Diagram]
Tesuji  

W1 is atekomi. Black can't protect at both a and b.

This particular example happens to be a Clamping Tesuji as well, however, this would still be atekomi even if the marked clamping stone wasn't there.

Example 2

[Diagram]
Connection  

The atekomi, B1, connects underneath.


Example 3

[Diagram]
Black to play and kill  

The atekomi, B5, sets up the eye killing play, B9.


Real game example

(This example comes from KGS - exam vs. pyczhm 7-2-05)

[Diagram]
Atekomi  

Black has just played B1 and now white must try to escape. Perhaps white thought 'a' might work, but it does not.

[Diagram]
Atekomi  

After B3, White is cut.

B3 at 'a' or 'b' would fail; the Kosumi Cut works where other cuts do not.

'a' or 'b' is a common mistake because we are used to StrikeAtTheWaistOfTheKeima


See also:


Atekomi last edited by hyperpapeterie on October 12, 2011 - 04:39
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