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GSATE problem 99
    Keywords: Tesuji, Problem

[Diagram]
Problem 99

What is Black's tesuji in this position?


[Diagram]
Book Solution (White 3 points - Black Sente)

the solution says 1 is hard to see and that white must pull back to 2 to make 2 eyes, and that black 3 is then sente.



[Diagram]
Hmm?

KarlKnechtel: White has to 'pull back'? Why? I don't see any way of killing this shape.


[Diagram]
This way

ChessWhiz: Although I don't see a way to kill, this result is even better than the solution -- only 2 points for white, and black has sente. If instead W4 at 5, B5 at 4, putting half the group in atari and killing the rest.



[Diagram]
My solution -- Show me where I went wrong (White 2 points -Black Sente)

Seems 1 threatens to kill white with a shortage of liberties, White is reduced yet another point in sente.


[Diagram]
White loses it all

[Diagram]
I don't think so.

unkx80: Black loses points instead.

Joeseki: Thanks! I initial thought Black could play 3 to the left of B1, but W4 at 6 would be fine for white as well.



This is a copy of the living page "GSATE problem 99" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.