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BeginnerExercise19

 

Beginner Exercise 19 Solution
   

[Diagram]
Diag.: White first to live

KarlKnechtel: The eye at a is already secured. White needs to make one in the space around b.


[Diagram]
Diag.: White first to live

First, White chases Black around. With any other black response, White makes a sagari at any time to seal off the second eye.


[Diagram]
Diag.: White's tesuji

White 5 threatens capture of more than enough eye space, so Black must capture.


[Diagram]
Diag.: White first to live

White 7 threatens to capture again so Black fills in, but it's a connect-and-die - White 9 finishes the job since Black can't escape.



[Diagram]
Diag.: Reference diagram

splice: Small technicality. Karl's comment: "White 5 threatens capture of more than enough EyeSpace[...]". As far as I can read, anything less will leave White with one eye. To wit...


[Diagram]
Diag.: Not enough

[Diagram]
Diag.: Not enough pt 2

So playing until the black stone is hit is not more than enough eye space, it's actually just enough. At least, the way I see it :)



[Diagram]
Diag.: Not enough (Correction)

unkx80: In the diagram entitled "Not enough", White 3 is wrong, but Black 4 is also wrong. White 5 lives.

aigo: Following the same line of logic, White 7 is another mistake, it should go where 8 is to make an eye instead of capturing the black stone.

unkx80: Yes.


[Diagram]
Diag.: Not enough (Correction)

Black 4 should be played here. Subsequently, if White a, Black throws in at 2 and the eye becomes false.



[Diagram]
Diag.: Just enough

[Diagram]
Diag.: Just enough pt 2

This way White has just enough space to make a second eye.





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