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TsumegoFromGames12

 

Tsumego From Games 12 Solution
   

[Diagram]
Diag.: Moves 218 to 227

DaveSigaty: The cut at 1 starts the fun, threatening to capture 2 B stones and connect to the left. When B answers at 2, W 3 takes advantage of B's shortage of liberties. W 5 threatens to connect by capturing two stones. B 6 connects at 3. W 7 and 9 prevent B from making two eyes. W 3 and 9 are two variations on the theme of shortage of liberties - a very important idea in tsumego.


[Diagram]
Diag.: Moves 228 to 230

The final result is ko. Although B had a lot of ko threats, W can afford to give something up in order to win the ko since the B group at the bottom will die.



[Diagram]
Diag.: Alternative for B 2

It is worth wondering what would have happened if B had answered W 1 with 2 instead of playing "a". In this case it appears that B can answer 3 with 4. However, W 5 renews the threat of capturing at "a" while at the same time threatening to play at 8 and capture three stones. B's only chance is B 6 but W plays atari at 7 and connects at 9. At this point W has four liberties and B has two cutting points at "a" and "b". W will capture some stones and live.



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