Hi senetsomed,
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| question about seki exercise in go book http://lifein19x19.com/viewtopic.php?f=11&t=16593 |
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| Author: | senetsomed [ Sun Apr 28, 2019 3:48 pm ] |
| Post subject: | question about seki exercise in go book |
Hi, I think this exercise in "baduk for beginners" (Kim Sung-rae) (p 140, Spanish edition) is not correct: Black moves: Find the movement that creates seki: And the provided solution is: But I can't see the solution at all... I mean, then White can end up with two eyes? : May be the diagram is incorrect in this edition? I tried also with the stone at D1 changed to black, but then Black always win with B2, so no seki - for example (if White doesn't play inside, Black C1 will win): Anyone has this book and can search for the forth exercise in chapter "4.8 Seki" ? Any help is welcome, thanks |
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| Author: | Uberdude [ Sun Apr 28, 2019 4:18 pm ] |
| Post subject: | Re: question about seki exercise in go book |
My guess is there is the following stone missing: |
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| Author: | EdLee [ Sun Apr 28, 2019 4:36 pm ] |
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Hi senetsomed, |
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| Author: | senetsomed [ Mon Apr 29, 2019 12:22 pm ] |
| Post subject: | Re: question about seki exercise in go book |
Thanks Uberdude, you're right, it seems the most plausible "patch". I think I didn't find it, because it is kind of a seki with cycle, because after black B2, white can play A1, forcing black to play C1 capturing, forcing white to play A2 to capture A3, returning then to the position after the initial black B2. I don't know if this makes this a "proper" seki, because couldn't this sequence be interlaced with other intermediate plays maybe "losing" this seki? May be this is usual with seki's as it is with ko's? I do not know: I am still at the middle of this beginners' book 
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| Author: | Pio2001 [ Mon Apr 29, 2019 3:19 pm ] |
| Post subject: | Re: question about seki exercise in go book |
Uberdude wrote: Right ! In the English edition, page 148 (4th problem of the chapter about seki), this stone is indeed present. Anyway, you are lucky to have this excellent book translated in your language. Its only weakness is the introduction to the principle of two eyes, that is confusing. |
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| Author: | senetsomed [ Mon Apr 29, 2019 6:16 pm ] |
| Post subject: | Re: question about seki exercise in go book |
thank you very much Pio2001 for the material confirmation!  So, it is a "proper" seki, even having a "cycle" of mutual attack and defense in it? PS: Yeah, the book is good: with it I'm starting to understand the game after various previous unfruitful attempts 
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| Author: | Pio2001 [ Thu May 02, 2019 10:35 am ] |
| Post subject: | Re: question about seki exercise in go book |
senetsomed wrote: So, it is a "proper" seki, even having a "cycle" of mutual attack and defense in it? Yes, because -White can't kill Black -Black can't kill White ...and in the end, we don't know whose territory are the intersections between the black and white stones. They are thus considered as a "neutral zone". |
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| Author: | Bill Spight [ Thu May 02, 2019 11:49 am ] |
| Post subject: | Re: question about seki exercise in go book |
senetsomed wrote: So, it is a "proper" seki, even having a "cycle" of mutual attack and defense in it? Depends on what you mean by proper. Some rules, such as AGA, Ing, and Chinese, require a rule to prevent endless repetition in such cases. In Korean and Japanese rules White loses 1 pt. in each cycle, so if White keeps on playing the cycle, eventually Black can win the game by allowing White to capture the two Black stones.
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| Author: | senetsomed [ Sat May 18, 2019 12:31 pm ] |
| Post subject: | Re: question about seki exercise in go book |
Thanks for the answers ! I didn't know about the AGA rules... it is very interesting that "Repeated Board Position" rule... I have tooooo much to learn
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