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| Pattern problem http://www.lifein19x19.com/viewtopic.php?f=12&t=11782 |
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| Author: | clemi [ Mon May 04, 2015 7:19 am ] |
| Post subject: | Pattern problem |
I'm currently studying Lee Chang Ho Course, middle level, book 1 and stumbled accross the above problem in lesson 7. The correct answer is A. Anyone any idea why A is eventually better than B ? |
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| Author: | DrStraw [ Mon May 04, 2015 7:22 am ] |
| Post subject: | Re: Pattern problem |
Either way white must capture the corner stones and black gets to play B. But if A is on the board then white cannot later hane and connect at the top so that becomes black's privilege later. |
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| Author: | clemi [ Mon May 04, 2015 7:28 am ] |
| Post subject: | Re: Pattern problem |
Thanks DrStraw for seeing the better yose continuation, that's the kind of thing I need to improve. |
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| Author: | macelee [ Mon May 04, 2015 9:34 am ] |
| Post subject: | Re: Pattern problem |
Also there is one extra (rather big) ko threat left there if black plays the correct move. |
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| Author: | illluck [ Mon May 04, 2015 10:30 am ] |
| Post subject: | Re: Pattern problem |
Probably a question indicative of bad hibits, but are there cases where black might want to play b because if black plays a white will play b first? |
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| Author: | DrStraw [ Mon May 04, 2015 10:42 am ] |
| Post subject: | Re: Pattern problem |
illluck wrote: Probably a question indicative of bad hibits, but are there cases where black might want to play b because if black plays a white will play b first? If W has positions on both sides this is conceivable, but I think the point of the exercise was the best way to force W to capture the corner. Also, given the B has a nice shape move at A it is hard for W to play this way. |
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| Author: | Uberdude [ Mon May 04, 2015 12:38 pm ] |
| Post subject: | Re: Pattern problem |
Black might also answer because you helped him damage your outside stone, and 5 in sente is huge. In the usual joseki by blocking at the top in sente the left block is no longer sente so there is a cut on the left. I once lost a game and a tournament and about £50 because I misjudged the severity of this cut. |
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