HermanHiddema/Sandbox

Sub-page of HermanHiddema
[Diagram]
Trick around graphics limitations  
[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?


HermanHiddema/Sandbox last edited by HermanHiddema on September 28, 2023 - 23:01
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