Keima side connection

    Keywords: Shape, Tactics

Chinese: -
Japanese: ケイマワタリ (keima-watari)
Korean: -

Table of contents Table of diagrams
Keima watari
Another example
Normal sequence
Alternate sequence

Ear-reddening game, move 137

Definition

[Diagram]
Keima watari  

Here B1, which is a keima in relation to both the black+circle stones - is a tesuji for safely connecting the two groups. The move is an application of watari and dropping back. It is also known as keima watari.

[Diagram]
Another example  

Another example: the white+circle stone connects all the white stones. See /Discussion to see the tactics behind this connection.


Example of application in a game situation

[Diagram]
Normal sequence  

After W3, B4 is normal (Even a moron connects against a peep). But what if black tries to split with B4 at W5?

[Diagram]
Alternate sequence  

B4 is a mistake, unless the top side is so valuable to Black as to compensate for the complete loss of the corner. After the sequence up to W13, white has connected under with the keima connection.

Don't forget that black can meaningfully cut at C17. If white blocks at C16, black can stand up at C18 and kill the 5 stones --gnostic?

[Diagram]
 

kb: gnostic?: You're missing W2 @ B3, then W2 and a are miai for a White connection. See the second example in Dropping Back.


Discussion

Similar shape in ear-reddening game

Patrick Traill: What about the similar shape of move 137 in the ear-reddening game, as below? Is this a (more or less) common way of connecting, or does it only work because of something about the white stones below?

N.B. This probably belongs on a page of its own, if there is none yet.
[Diagram]
Ear-reddening game, move 137  

This is the same dog-leg shape, but out in the middle of the board. There is no comment on this move in Invincible, which calls W36 “the second brilliant move adjacent to the tengen” (the first being the ear-reddening move itself, black+circle).


Keima side connection last edited by PJTraill on September 27, 2019 - 23:26
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