Odd seki [#2531]
18.104.22.168: Odd seki
(2011-03-21 12:40) [#8374]
GNU Go is stronger than I am in some ways, so I've been playing against it a lot, mostly at 9x9 for tactical practice. I think I've discovered a weakness; it is not good at avoiding seki; I sometimes get away with things I shouldn't. Here's an example, from a 2-stone game with me black. We were here as of move 24, W to play.
White passed, which I suspect is a blunder. I think he should cover the vital point X, but I'm not entirely sure that is necessary. That's my question.
The next few moves were:
We ended up with just a large black territory plus a large seki, complete disaster for White. But where did he go wrong? The pass? Or later?
22.214.171.124: ((no subject))
(2011-03-21 15:25) [#8375]
IGS 5K+: I believe Black 1 is the most important point to play and that White should waste no time in occupying the other key point, White 2.
Up to 8 Black could play a, b, or c to start a ko but I see no chance of her winning any of them. If Black a, White b. If Black b or c, White a.
: Re: Odd seki
(2011-04-06 08:11) [#8393]
So you are saying White's pass in the original position is OK because he can defend adequately against Black 1 later?
126.96.36.199: Re: Odd seki
(2011-04-21 19:18) [#8420]
IGS 5K+: In this partcular situation the game is complete to my eyes and White is behind on territory. I would pass (I prefer to pass rather than resign if the end-game has already been fought).
In general there is something to be gained from defending this group because otherwise if Black generates some ko-threats elsewhere she can use them to make a seki here.
188.8.131.52: Re: ((no subject))
(2011-04-19 05:07) [#8409]
Black would play at b, and white would have to struggle to salvage even a seki.
184.108.40.206: Black's resistance
(2011-04-21 19:16) [#8419]
IGS 5k+: I don't see that White has any difficulties. If Black descends to here then White can respond with . The sequence to leaves Black with nothing.
IGS 5k+: Here Black tries cutting with but this comes to nothing too.
IGS 5k+: Because White has some ko-threats Black can't hope to win this ko.
Please show us if you have a stronger resistance for Black. I don't see anything better than these.
220.127.116.11: Re: Black's resistance
(2011-04-21 23:37) [#8421]
B@a looks to lead to an unfavorable ko for black (must find first threat).
18.104.22.168: Re: Black's resistance
(2011-04-22 00:11) [#8422]
IGS 5K+: Ah! I didn't consider . It seems you are quite right and that Black can manage a seki after all.
Thanks for this.