Waist cut

   

Chinese: 跨断 (kuā duān); 跨 (kuā)
Japanese: ツケコシ (付け越し) (tsuke-koshi)
Korean:

[Diagram]

The waist of the keima

The circled points show the weak spots of the keima.



If there are black stones near these weak spots, the spot farthest from the black stones is called the waist of the keima. [1]

[Diagram]

Waist cut

B1 is the waist cut, striking across at the waist of the keima.



The basic technique for White is to answer with hane at a, not push through at b.

[Diagram]

Hane away from the position

This (B3 and W4) is not necessarily the continuation, but by playing the hane away from the position, White limits the loss to white+circle.



[Diagram]

Hane into the position

To push through is usually bad.



Black cuts easily with B3 and now two white stones are cut off.

[Diagram]

Missing the waist cut

Not striking at the waist of the keima, but cutting at B1 as in this diagram is zokusuji (vulgar play or bad style).



White's natural moves are good moves: blocking at W2, and either sacrificing white+circle in order to make shape as in this diagram, or extending as in the next diagram:

[Diagram]

Extending

If the surrounding position is strong enough, White can extend (stretch).



This is unlikely to occur, however, for if White were strong around, Black should not want to cut through the keima anyway.


Linguistic notes

The Japanese term tsuke-koshi is literally attach across, waist cut is not necessarily standard terminology. See strike at the waist of the keima / discussion page.

[Diagram]

Waist cut

In Chinese, B1 alone is called 跨 (kuā), the B1-W2-B3 sequence is called 跨断 (kuā duān). The character 跨 (kuā) means "straddle", and the character 断 (duān) means "cut".


See also: Sealing in by striking at the Waist

Authors: Dieter Verhofstadt, EGF 1 kyu


[1] Bill: Really? Why not both?


This is a copy of the living page "Waist cut" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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