False seki

  Difficulty: Beginner   Keywords: Life & Death, Go term

Chinese: 假双活 jiǎ shuāng huó

A false seki is a position that looks like a seki but is not, because one player's stones are actually dead. A false seki may be a temporary seki that has collapsed, or it may be a position that arose in killing the dead stones.

Examples:

[Diagram]
Black dies  

This example comes from [ext] this Chinese site. After B4, W5 - W9 form a false seki.

[Diagram]
Bent four  

Yes, a dead bent four in the corner is a false seki.

(W1 on the 1-1 point lives.)

[Diagram]
black dead  



[Diagram]
White is dead, bulky five  

B3 @ black+circle


Discussion

Bass: To me these three final diagrams do not seem like examples of false seki. They are plainly dead (we'll talk about the bent four later ;-) ) and I do not think there is any need for a term that means "dead, but somebody once misread it as seki". However, the first diagram displays a "proper" false seki, where there are groups that are locally in a seki, which will however collapse because some of the surrounding stones will get killed. In my opinion, this is a much more useful meaning for the term.

Googleplex?:I agree - in the last two examples it is possible for the target colour to make life.

W would play circle instead of 2 in the last example and in the previous one, black is able to make two columns of two, each as good as an eye.

MrTenuki: I think the reason that the last example is listed here is that the situation is similar to "real" sekis in one way: if either Black or White plays a stone locally, the other player may capture. What makes the seki false in this case, then, is the fact that, for White, capturing after Black plays a stone locally still does NOT make life (while Black may save the four stones if White plays locally first).

Zar?: We mention that a group is dead with a false eye, don't we? I could argue that the group is simply dead and that is simply not an eye. Consider it an educational term. The first example's just dead as well in my opinion.


False seki last edited by 96.231.163.8 on August 21, 2011 - 20:00
RecentChanges · StartingPoints · About
Edit page ·Search · Related · Page info · Latest diff
[Welcome to Sensei's Library!]
RecentChanges
StartingPoints
About
RandomPage
Search position
Page history
Latest page diff
Partner sites:
Go Teaching Ladder
Goproblems.com
Login / Prefs
Tools
Sensei's Library