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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.
Marked points: weaknesses ClassificationSee notchers for the coding. 311
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
Black 1 makes life
Black still needs to play at 1 to make life.
311 is dead, except for 311NS and 311SS, which can live 312TableSee notchers for the coding. 311WW D -- (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. |