Beginner Exercise 203 / Solution

Sub-page of BeginnerExercise203

byorgey 15k:

I'll give it a try. (= This is indeed a cool problem.

[Diagram]
Black to live.  

B1 is the proper solution.

[Diagram]
Continuation 1.  

If white plays at any of the three points marked a, black captures at b, making the second eye, and the remaining two a points are miai to connect the eyes.

Comment: If white plays at the middle a, black could also play on one of the side a, making b and the remaining a miai. White has then the same amount of threats, but black has the chance to gain two additional points later if white tenukis.

[Diagram]
Continuation 2.  

If white plays W2 instead, black must capture with B3. Black then captures the throw-in at W2 and a and b are miai.



Some failed attempts:

[Diagram]
Failure.  

After W4 there is no way for black to make a second eye. B1 at W2 fails in similar fashion.

[Diagram]
Failure.  

After B1, W2 takes away the second eye. Playing B3 at a does not help; black can capture W2 but still does not get a second eye. Playing B3 at b does not help either since white has enough time to escape.

[Diagram]
Failure.  

B1 does not work either: after the exchange of W2 and B3, the throw-in at W4 dashes black's hopes for a second eye.



Beginner Exercise 203 / Solution last edited by 129.206.38.76 on May 6, 2016 - 20:05
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