Sunday Problem #78

Published 28 Nov 2021 by antti (last edited 9 Feb 2022)

tags: tsumego, sunday-problem

I arranged this problem from a discussion that came up on the Go (Weiqi, Baduk) Players on Facebook group.

Japanese rules, no komi or captures, Black to play.

Spoiler

The correct solution results in a black one-point win.

Solutions

Solution
Forming an eye with black 1 is the correct starting move. After 2–3, white 4 presents Black with the other main challenge: here, Black should play 5–7 and resist with a kō fight if necessary (white 8 at 15 starts an approach kō, but Black has sufficient threats to win it). If instead of 7 Black plays at 15, White can throw in at 7, and then the result will be a draw.
After 15, the game ends and Black wins by one point.