Shikatsu Myoki Tsumego Series 113 / Solution

[Diagram]

Solution

B6 at W7 is met by W7 at a.

[Diagram]

Cont. 1

B20 at a is met by W21 at b and W23 at c.

[Diagram]

Cont. 2

W31 takes the ko at a. Black must win the approach ko to avoid seki-collapse.

Note: In Shusai's days, local ko threats must be considered in solving a composed problem. Black has none after W31.


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