Tsumego From Games 19

    Keywords: Problem
Status of the lower right corner  

Black has played the marked sequence to kill the white group. Can white still live ? If so, does Black have any alternatives for this sequence ?


The corner is ko  

First, white can get a ko. Moves from 1 to 4 are forced. Then the order of moves can be changed, the result is still ko. If W5 at 7 then B8, W9, B6, W5. If B6 at 8 then W9, B6, W7.

White dies.  

But black can do better. The exchange B1 for W2 in the first diagram is bad style as it's not necessary. If black starts with this 1 white dies.

White dies 2.  

This W2 is tricky but B3 is good.


Thanks a lot. I found the ko and Black's improvement, but I didn't deduce the bad style move because I didn't think about the last diagram. It is remarkable how a higher dan's answer combines accuracy and conciseness. --Dieter

Tsumego From Games 19 last edited by CharlesMatthews on January 23, 2003 - 18:39
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