HermanHiddema/Sandbox

Sub-page of HermanHiddema
[Diagram]

Black attempts to connect.

Now, white must prevent black from connecting under, for which there are three possible moves: a, b and c. Any other move, and Black can play c to connect.

[Diagram]

Obvious failure

This option fails easily. White gets cut and loses his stones.

[Diagram]

Also getting cut

The kosumi also fails for the same reason.

[Diagram]

Strongest resistance

The descent is the strongest move. Now white's stones on the right are safe, but those on the left are caught because of White's damezumari on the right.

[Diagram]

Black to play

Other

[Diagram]

Move 32

W32 should be at a. With this move there is still a possible black invasion at a or b.

[Diagram]

Black to play and win

[Diagram]

Black sacrifices

[Diagram]

Black wins

[Diagram]

B1 pass

[Diagram]

White captures

[Diagram]

White is alive

See also 5x5

[Diagram]

corner

[Diagram]

position at the end of the game

[Diagram]

W1 captures, B2 plays the vital point

[Diagram]

19x19 diagram

[Diagram]

tsumego

How should black respond to W1?

[Diagram]

response 1: death

[Diagram]

response 2: ko

[Diagram]

response 3: ko

[Diagram]

response 4: ko

[Diagram]

response 5: ko

[Diagram]

response 6: life

[Diagram]

Black to play

[Diagram]

corner

Black cuts with B1. How should white respond?


This is a copy of the living page "HermanHiddema/Sandbox" at Sensei's Library.
(OC) 2016 the Authors, published under the OpenContent License V1.0.
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