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Are some Puzzles actually not that useful?

<Comment deleted by user>
<Comment deleted by user>
There's the option to thumb up / down when the puzzle is finished.

Useful is quite a vague term, though. What is useful? I think some are pointless, but those are pretty rare, and incorrect ones are extremely rare.

Feel free to report incorrect puzzles, ideally after checking with the engine first.
Agree. Also found that a few specific puzzles had solutions that did not seem understandable. Would be cool to have a report button or something like this.
That's exactly what the thumbs-down button is for.

However, I find it very rare to encounter a truly pointless puzzle. Usually, I can find the point via engine analysis. Or, if the puzzle is very highly rated (some +300, many +600), I just assume I need to learn more.