Gokyo Seimyo Volume 3 Problem 15 / Solution

[Diagram]

Solution:ko

B1 is the book solution, threatening cut at a.

[Diagram]

many ways

In fact, there are many first moves leading to ko (including meaningless forcing moves; see below).

[Diagram]

Alternative ko

For example, h above lead to this ko (W2 at B3 is met by B3 at W2 winning), which is independent of the cutting point at a.


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