In another thread I wrote:
Turning one of your opponents groups into a seki usually a big thing in a game, often leading to victory.
Are there ways to sekify a group?
For years seki’s just happened to me. I thought I had a healthy living group and then my opponent put some stones in it and we both couldn’t play any move over there. I lost quite a few games because of the sekification of one of my groups. A seki usually means a reduction of the conquered territory of at least 10 points (but usually much more).
So the question is - when you decide to use sekification as a strategy / tactic - how to work up to a sekifiable group (preparing the situation) and how to sekify the group (creating a mutual life)?
@Groin & @Kosh already contributed to this question.
Anyone got suggestions, tricks, etc.?
Some interesting seki links here:
I couldn’t find a thread for this, but I wanted to show a large early-game seki from Kata vs Leela, which developed from a 3-3 keima-and push-in, inside cut joseki.
[image]
I tidied up the outside, so we can see that there are 20 black and 20 white stones relevant to the position.
The documentation is not clear on how to manually mark stones in seki. Essentially it says “click on stones to mark alive or dead” but more detail on how things should look for seki would be appreciated (perhaps a screenshot)?
I believe there can be cases where both players agree that a situation is seki, but cannot agree on whether the scoring tool properly shows the stones as being in seki.
I just had a game where my opponent appeared to be confused. Stones flashed alive and dead quite rap…
I thought it might be fun to share some sekis people find occurring in their games, or as happens to be the case sometimes, sekis that could’ve happened in the game but didn’t. There’s this old thread about biggest/impressive seki but I don’t want that restriction! Ones in the corner of the board I do find interesting though [Screen Shot 2020-09-11 at 01.23.47]
and one from a recent game on DGS.
[Screen Shot 2020-09-11…
What’s the biggest/most impressive seki you’ve got in a game? I just finished this error-strewn game with a 66 point seki, (69 if you count the shared eye), by far the largest I’ve ever seen:
Granted, we both had opportunities to kill at least part of that monster, but that would’ve made the game far less memorable!
Share your best!
Hi,
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Note that I’m not complaining about this player he was obviously in good faith, but he could not believe I was myself.
After we passed twice, I thought the bottom left group was seki, he thought it was dead. Then I say let’s play it out (which so far seemed to me the correct procedure), but then he says I should play first. Obviously if I thought it was seki I don’t want to play first. And if he is certain it is dead it should n…
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Kosh offered a tip in the same thread about one of my sekis
You can see that after move 243, White could play Q19 to devesting effect IF White just had one outside liberty. From what I’ve seen it’s often the removal of the outside liberties that marks the point where invasion becomes possible, often involving seki. Move 200 was okay but any time after that the cutting point at Q17 could have used fixing.
I’ve been trying to pay attention to the outside liberties ever since, but usually to avoid being invaded. I had not seen the idea formulated this way before, the timing of after endgame sealing territory was new to me. I should watch for chances to sekify my opponent as well
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If your opponent starts filling the outside liberties of your group (and sometimes they do that very sneakily), then bells should start ringing and lights flashing.
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Perhaps there is something in [Study Group] Essential Life and Death Patterns
Oh, and let’s not forget the example at Professional players making rookie mistakes - #32 by Vsotvep (the solution is in my spoilered reply)
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Lys
May 6, 2021, 4:46pm
6
Just remember to keep shared liberties .
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PSA: be careful not to sekify an opponent’s group you could have otherwise killed
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BHydden:
PSA
I assume this doesn’t refer to prostate-specific antigen, but to Public Service Announcement ?
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This happened to me recently: Seki
White passed and did not reinforce the group. Black can make a seki.
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