TsumegoFromGames19/Solution

Sub-page of TsumegoFromGames19
[Diagram]

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.

[Diagram]

White dies.

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

[Diagram]

White dies 2.

This W2 is tricky but B3 is good.

Lucky


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


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