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Referenced by
Notchers
TwoSpaceNotchers
OneSpaceNotchers

 

Three Space Notchers
   

ThreeSpaceNotchers - (c) James Davies - are groups that consist of a chain on the second line, interrupted by a notch of three empty spaces on the second line and three stones on the third. See also notchers, OneSpaceNotchers and TwoSpaceNotchers.


[Diagram]
Diag.: Three space notchers

Marked points: weaknesses
Marked stones: legs


Classification

See notchers for the coding.

311


[Diagram]
Diag.: 311NN

Even if Black takes the VitalPoint at 1, White first destroys EyeShape, then makes miai of A and B. With one of his weak spots occupied by White, the Black group's EyeSpace is almost filled with 3 in a row.


Hence 311WW, 311WN and 311WS are also dead


[Diagram]
Diag.: 311NS

Black 1 makes life


[Diagram]
Diag.: 311SS

Black still needs to play at 1 to make life.


311 is dead, except for 311NS and 311SS, which can live

312

Table

See notchers for the coding.

 311WW D -- 
311WN D --
311WS D --
311NN D --
311NS LD -
311SS LD -
xxxxxx ---
xxxxxx ---
xxxxxx ---

(work in progress)



This is a copy of the living page "Three Space Notchers" at Sensei's Library.
(C) the Authors, published under the OpenContent License V1.0.