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Rectangular six in the corner
Path: BasicDeathShapes · Prev: StraightThree · Next: Path: LifeAndDeath · Prev: TwistedFourInTheCorner · Next: TwoByFourBox
Keywords: Life & Death
Readers are advised to study the bent four in the corner and the rectangular six (if they have not mastered them) before reading the contents of this page. 1. No outside liberties
If there are no outside liberties, White can kill Black unconditionally by playing at a.
After 2. One outside liberty
When there is exactly one outside liberty, the best White can do is to make it a rogue ko. The vital point is at a.
Black's throw in at
After
With one outside liberty, this 3. Two or more outside liberties
When there are at least two outside liberties, Black is unconditionally alive.
The sequence is copied from the main line in the previous paragraph. Now Black can play the surprising move of AddendumIn this diagram, Black is dead. No, this is not a seki. Why?
After
If Footnote:
[1]: One could argue that, this being the case, White might as well fill the outside liberty in the main line diagram instead of connecting at See also Practice Authors WikiMasterEdited by Dieter. Previous version: Version 7 Path: BasicDeathShapes · Prev: StraightThree · Next: Path: LifeAndDeath · Prev: TwistedFourInTheCorner · Next: TwoByFourBox This is a copy of the living page "Rectangular six in the corner" at Sensei's Library. ![]() |