Forum for Bent four in the corner is dead
Exception [#893]
![[Diagram]](diagrams/2/5956d314ce5067b85a35d25ce5a9b4cf.png)
In this case, white is alive (by oshitsubushi if black tries to make it ko) as long as there are two external liberties. I saw two low kyu players miss this in a game the other night-- where can we add this information?
Good point, LukeNine45!
This is also not bent four in the corner.
![[Diagram]](diagrams/52/38224fddca96809b5c19cfc6d3888883.png)
Ah, I see. It's ko with one or no outside liberty. (Actually, that's what ended up happening in the game I saw that inspired this!)
Would it be accurate to say that "bent four in the corner" only refers to the situation where black can wait until the end of the game to start the ko?
Yes, the condition is "can be reduced to bent four whenever the attacker wants", not "is reduced to bent four". If the attacker has to make the bent four shape before the end of the game, it is just ko, resp. alive if there are enough outside liberties.
I added a bit to the page. Not sure if it's the best spot, but it's better than not mentioning it!
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