Bent four sharing thread

[yebellz]

@stone.defender

Did anyone have 2 bent-four in 1 game?
So only one of 2 groups can be actually killed with it if both are same color.
And I can’t imagine what happens if they are opposite color.

Found the example and posted about it here:

@yebellz

I found that the original position (although without the detailed analysis) can be found via Sensei’s library here: Strange Sekis at Sensei’s Library

Here is the pattern, which is seki under all rulesets:

This is seki in a manner analogous to hanezeki, in the sense that whoever plays another move in the local position will surprisingly start a capturing race that they lose. In other words, you can only win the capturing race if your opponent plays first (and hence no one should want to start it).