Beginner Exercise 259 / Attempts

Sub-page of BeginnerExercise259
[Diagram]

A ko.

I see a very bad ko for black. -Mihoda

[Diagram]

B wins the ko.[1]

[Diagram]

Where to play for W.

A white play at W1 seems best. -Mihoda

[Diagram]

Five ko threats are left over.

B1, B3, B5, B7 & B9 are ko threats later on, so look for B to start ko. - Mihoda


[1]

[Diagram]

Black wins ko (better)

B5 @ black+circle

Bill: Black has a better way to win the ko. B1 puts the white+circle stones in atari. If White takes the ko with W2, B3 says atari again, and White cannot connect at black+circle because of damezumari (connect and die). After W4 B5 takes the white+circle stones.

[Diagram]

Local ko threat

Bill: That being the case, W1 is a local ko threat for White. If B2 connects @ W3, W3 @ B2 kills.

Note that Black has some local ko threats starting at a.


This is a copy of the living page "Beginner Exercise 259 / Attempts" at Sensei's Library.
(OC) 2014 the Authors, published under the OpenContent License V1.0.
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