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BeginnerExercise133

 

Beginner Exercise 133 Solution
    Keywords: Problem

[Diagram]
White first to kill.

mgoetze: After W1, a and b are miai - If black plays a, b destroys the second eye and black is left with a killing square four; if black plays b, white a makes a killing bulky five.



demetria: What I really want to know about this problem is : What is the value for white in destroying the eye? Doesn't it cost too much to kill it?

mgoetze: Uhm, the value is that all the black stones are dead afterwards, when they could have lived otherwise. If you look at it in terms of area scoring (which doesn't produce a different result than territory scoring, it's just easier), there are 9 black stones enclosing another 7 or so intersections... white gains this area, black loses it, so playing 1 puts white ahead about 30 points... (I suck at counting though, so if anyone cares to correct me...)

Demetria: I can't say if your answer about the points is correct - estimating the score makes no sense to me. Oh, thanks for clearing up the part where if black a then white must take b, there were some people who didn't see that a dead shape is only dead in the absence of another eye.




This is a copy of the living page "Beginner Exercise 133 Solution" at Sensei's Library.
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