at 
w has 3 threats
w has 3 threats
What am I missing?
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| Author: | speedchase [ Tue Jan 03, 2012 7:42 pm ] |
| Post subject: | another Tsumego question |
The solution given is a, but I don't see why b doesn't work. |
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| Author: | Kirby [ Tue Jan 03, 2012 7:56 pm ] |
| Post subject: | Re: another Tsumego question |
b works, too. |
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| Author: | speedchase [ Tue Jan 03, 2012 8:07 pm ] |
| Post subject: | Re: another Tsumego question |
Thanks you Kirby! |
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| Author: | tchan001 [ Tue Jan 03, 2012 8:13 pm ] |
| Post subject: | Re: another Tsumego question |
b works BUT it is not the best solution as it allows black to get an extra ko threat. a is settled plain and simple. |
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| Author: | speedchase [ Tue Jan 03, 2012 8:21 pm ] |
| Post subject: | Re: another Tsumego question |
w has 3 threats w has 3 threats What am I missing? |
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| Author: | Kirby [ Tue Jan 03, 2012 8:22 pm ] |
| Post subject: | Re: another Tsumego question |
tchan001 wrote: b works BUT it is not the best solution as it allows black to get an extra ko threat. a is settled plain and simple. I agree that 'a' seems more natural, but I'm having trouble verifying this statement. If we play 'a', I see that there can be three ko threats: On the other hand, if we play 'b', I see a similar count: |
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| Author: | Kirby [ Tue Jan 03, 2012 8:25 pm ] |
| Post subject: | Re: another Tsumego question |
The benefit that I can see is that if, later in the game, something else is bigger than killing this shape. If we have played 'a': Then if white threatens life, and black lets him have it, there's not a ton of loss: But in the same scenario, there seems to be more of a loss if we had done 'b': I think that's why 'a' seems more natural to me. |
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| Author: | speedchase [ Tue Jan 03, 2012 8:31 pm ] |
| Post subject: | Re: another Tsumego question |
Unless you are worried about black's thickness I would think it would be the opposite. In the first variation white's group is unconditionally alive with 6 points. In the second variation whites group is unconditionally alive with 5 points including the prisoner with a 1 point gote play to get the sixth. Is the security of blacks thickness really threatened enough for the difference to be more than 1/2 a point? |
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| Author: | Kirby [ Tue Jan 03, 2012 9:17 pm ] |
| Post subject: | Re: another Tsumego question |
speedchase wrote: Unless you are worried about black's thickness I would think it would be the opposite. In the first variation white's group is unconditionally alive with 6 points. In the second variation whites group is unconditionally alive with 5 points including the prisoner with a 1 point gote play to get the sixth. Is the security of blacks thickness really threatened enough for the difference to be more than 1/2 a point? Both groups end in gote, but white can more easily get another point, I think: In Diagram A, black can play at the marked intersection to get the point at "p". In Diagram B, on the other hand, this point is already taken away by the marked white stone, so black has no chance of getting the point at "p". White can later play at "q" to gain another point for his group. In other words, because "p" is not an option in Diagram B, and because white's play at "p" is sente, and because white can play at "q", I feel like white gains more in Diagram B. |
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| Author: | speedchase [ Tue Jan 03, 2012 9:18 pm ] |
| Post subject: | Re: another Tsumego question |
Oh I see that makes sense. Thanks guys! |
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| Author: | Kirby [ Tue Jan 03, 2012 9:20 pm ] |
| Post subject: | Re: another Tsumego question |
speedchase wrote: Oh I see that makes sense. Thanks guys! Cool... Because it only partially makes sense to me. I'm still kind of thinking about it. 
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