Sunday Problem #67
Published 12 Sep 2021 by antti
(last edited 20 Sep 2021)
This is a classic tesuji problem that appears for example in Lee Chang-ho’s collection of tesuji problems.
Black to play.
Solution
Simply connecting at 1 does not cut it for Black. White extends his corner group’s liberties with 2, threatening to live with 3; if Black tries to prevent this with 3, then white 4 first captures Black.
Black has to attack White’s corner liberties directly with 1–3. White has no choice but to capture with 4, after which Black forces 5–6 and . . .
. . . then throws in at 7 and 9, finally setting up a kō fight for the life of all three groups in the corner.
Comments (1)
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