![]() StartingPoints Paths Referenced by
|
Twisted four in the corner
Path: LifeAndDeath · Prev: BentFourInTheCorner · Next: TwoByThreeBox
Keywords: Life & Death
1. Fewer than two outside liberties
If there are fewer than two outside liberties, White can turn this position into ko.
White 3 starts the ko. White can finish the ko by filling at the marked stone. 2. At least two outside liberties
If there are at least two outside liberties, Black is alive with three points.
Thanks to the two marked liberties, Black can play atari at 4. Without one of those liberties, he would be putting himself into atari.
3. Endgame implications
When White reduces the outside liberties to 1, Black 2 or a makes three points in gote, preventing the ko.
Jared Beck: However, if Black 2 at a, as shown here, white has a ko threat at 3. Compare this to the above diagram, where White does not have a ko threat. Authors Contributors Path: LifeAndDeath · Prev: BentFourInTheCorner · Next: TwoByThreeBox This is a copy of the living page "Twisted four in the corner" at Sensei's Library. ![]() |