There is a new feature as of today, thanks to a suggestion from user ‘bcs’. Under account -> settings -> difficulty you can choose how difficult you want your puzzles to be. Give is a try and let me know what you think.
A couple of caveats.
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There are not that many problems that are really hard so strong players may find themselves getting easier problems after they’ve done all the hard ones. More problems are coming.
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Many or most problems have not been done enough times for their ratings to settle so there will be some surprises, both too hard and too easy.
As always, bug reports and feedback are deeply appreciated.
Best,
Brooks