RTG Problem 14 / Attempts

Sub-page of RTGProblem14
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Solution (variation 1)

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Solution (variation 2)

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Solution (variation 3)



unkx80: I am not sure whether the above diagrams count as solution. I believe it might count as a solution on the condition that following ladder does not work for Black.

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Solution (variation 1)

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Solution (variation 1)

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Solution (variation 1)

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Alternative for Black?

Dave: How does White handle this B2?

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Alternative for Black?

unkx80: It reverts back, no?

Dave: I thought there was more but now it seems you are right.


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Wrong answer

a and b miai. Black c, White plays at B4. Black dies.

SnotNose: a and b aren't miai. White always has d to take away the eye at the edge.

unkx80: Besides, what happens when B2 is played at B6 instead?

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Ko at least

unkx80: Problem is, solution should not be a ko.


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Puzzled

Dave: I can't figure out how Black lives against this W1. However, it should not be the answer as there is no reason that I can see for the marked stone to be in the problem if W1 kills.

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Puzzled

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Puzzled

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Puzzled

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Puzzled

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Puzzled

unkx80: How do you answer B2?

Dave: We don't? :-) So...


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Never give up!

Dave: We descend to the edge. This puts meaning back into the marked stone at least :-) First let's look at that troublesome diagonal play that spoiled my last idea... After B10, White pulls back at a. The marked stone is in exactly the right spot!

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Never give up!

Dave: If B6 here White can not play at W7. After W10 capturing two stones or W3 are miai to make the point at b an eye.

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Never give up!

Dave: Instead White plays W7. Now b and c are miai to reduce Black to a single eye.

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Never give up!

Dave: The diffence between this W1 and the play at a analyzed at the top of this page is that after W7 here there is no play at b and it is impossible to set up the ladder that unkx80 showed us above.

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Never give up!

Dave: In answer to B10 White plays b rather than a and there is no eye there.

unkx80: Both of you have got it for both the problems. =)

Dave: Note for readers. Sometimes we see the advice that we should solve problems in our heads to get the most out of them. That is what I normally do when I go through books (of course it is a little hard to carry a board on the subway :-). But our brains alone will only carry us so far - or else we would all be 9 dans, right? Sometimes you just need to dig if you are have any hope of solving it. I analyzed this problem in CGoban. The resulting sgf file (just variations, no text) is 8KB - as long as some reviews that I have written for the go teaching ladder. Sometimes there is no substitute for persistence :-)


This is a copy of the living page "RTG Problem 14 / Attempts" at Sensei's Library.
(OC) 2012 the Authors, published under the OpenContent License V1.0.
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