This is the cover problem of Mateusz Surma’s tsumego book series You won’t get dumber while thinking.
Composing go problems is tough work. It can take hours just to come up with one good problem and, once you publish it, the problems themselves are not even copyright-protected – only the problem collection and the answers. This is why I like to support original problem creators when possible.
This problem is intriguing in that it doesn’t involve very complex reading; instead, most of the effort is needed to figure out just what is going on in the first place.
Black or White to play.
In other words, it is generally correct for both players to ignore the position until one of the players finds a timing when they have enough threats to win the kō (or else get a big enough compensation elsewhere). This type of a kō fight is sometimes called ‘reserve kō’ (保留コウ, horyū kō).
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