Ugly sagari

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HolIgor: I would call this ugly sagari tesuji. It appear with two unfriendly stones that cut off our forces and there is some shortage of liberties. The following diagram is just a general scheme. But the move is useful to remember.

[Diagram]

Ugly sagari


Dieter: Let's explore the alternatives.

[Diagram]

Approach ko

B6 recaptures at B2 and it's an approach ko. Black must make an approach move at a to make it a direct ko.

[Diagram]

Inducing the ugly sagari

After W1 - B2, White makes the ugly sagari all the same. Isn't this better ?

[Diagram]

Ugly sagari

unkx80: I believe this is an instance where the "ugly sagari" is the only correct move.

John F. Excellent name! And like the ugly duckling it can turn out to be a beautiful swan.


AYHAL? Another alternative to consider which is often useful:

[Diagram]

Belly attachment

[Diagram]

Belly attachment

unkx80: However, this results in a ko when the "ugly sagari" tesuji wins the capturing race without ko.



(sIG): This one doesn't look like much of a ko fight to me...

[Diagram]

Belly attachment

I mean, black _is_ trapped for good, no? He cannot fill the ko square at WC. What he can do, is to play at a and make white take at WC and then there is a ko, but the bet for white is also her group of four, that is, higher than just to get the black stones. Without black stone in a, white can simply consider the black stones dead.

[Diagram]

Big ko

Bill: After W4 above, B5 makes a big ko.


See also


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