Beginner Exercise 25 / Solution

Sub-page of BeginnerExercise25
[Diagram]

Ah! My eye! I can't see!

B1 hits the vital point and kills the group by making miai of the kill at a or b.


[Diagram]

Only one eye

If W2, B3 prevents a second eye.

[Diagram]

Throw-in

If W4 captures, B5 still holds White to one eye.

It would do White no good to capture B5, even as a ko threat, because the resulting eye would be a false eye.

[Diagram]

Bent four - but with the two vital points occupied

And if White blocks the other direction, she still dies after B3.


[Diagram]

Black must answer W2

Alternative white response that needs to be answered.

Question: I followed this line pretty easily, but I am having a hard time following past this point. If White plays W2, what must Black answer with? And why?

Jacob4Jesus: I believe that a is a better choice than B3 because it provides a stronger external shape for B. B3 and b then (as above) become miai for death.

JoelR: Any of B3, a, or b will kill, but B3 is best because it gives White no ko threats. Black b allows W3 as a threat which must be answered at b again, and a allows two threats. Black is strong enough outside; I cannot see a way an approach move could threaten to rescue the group and also have some outside effect.



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