Tsumego From Games 42 / Solution

Sub-page of TsumegoFromGames42
[Diagram]
Double ko death  

W1 is the vital point.

After W9, if B a, then W b. If B b, then White captures four stones (connect and die).

If B6 is at B7, W6 prevents a second eye, as in variation 1.

(W5 could also be at W7. If then B8, W5.)

[Diagram]
No ko ?  

Iago not saying the previous variation doesnt work, but isnt this simpler for the same result ? if black goes for a ko, white can atari with W a unless I am missing something (number of ko threats?)

hhw: Black will first play B6 at b. It looks to end in only ko.



[Diagram]
Variation 1  

After B4 secures W1, W5 prevents a second eye.

B8 and W9 are miai.

[Diagram]
Variation 2  

After B2, W3 prevents a second eye. Even with B4 Black cannot create an eye in the corner.

If B4 is at B5, W4 reverts to variation 1.


Failure

[Diagram]
Big ko  



[Diagram]
Big ko (ii)  



[Diagram]
Big ko (iii)  
[Diagram]
Small ko  



[Diagram]
Oshitsubushi  



[Diagram]
Bad ko  

Black takes this ko first.


Tsumego From Games 42 / Solution last edited by 128.174.228.138 on January 8, 2010 - 14:40
RecentChanges · StartingPoints · About
Edit page ·Search · Related · Page info · Latest diff
[Welcome to Sensei's Library!]
RecentChanges
StartingPoints
About
RandomPage
Search position
Page history
Latest page diff
Partner sites:
Go Teaching Ladder
Goproblems.com
Login / Prefs
Tools
Sensei's Library