higher or lower?
Much higher. I’m not sure what’s the intended rank, but probably at least 4D.
One of the weak points of most of my OGS puzzle collections is their ranking. Often they are officially not ranked or unrealistically ranked.
It may be that the ranking is in the descriptions of the books, but they are often written in Japanese and therefore unavailable for me.
So I ranked them myself on 5 kyu (maybe solvable for me), 10 kyu (easily solvable by me or 20 kyu (childishly simple). Sometimes I adjust the levels if I think I am wrong. But puzzles at a dan level are for me hard to rank (just wildly guessing).
So any time you lol at one of my rankings, pls give me feedback and I change it.
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