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Re:Generating chess puzzles with generic algorithms (2022) by tromp on Friday September 29, 2023 @07:28AM (#37702140)
Lichess can serve you arbitrarily many puzzles [1]. They'll keep track of your performance and adjust the difficulty of the problems accordingly.

[1] https://lichess.org/training

Re:Generating chess puzzles with generic algorithms (2022) by thope on Friday September 29, 2023 @07:58AM (#37702511)
and here is the project used to generate Lichess puzzle database

https://github.com/ornicar/lichess-puzzler

Re:Generating chess puzzles with generic algorithms (2022) by amalcon on Friday September 29, 2023 @11:01AM (#37705285)
I can say definitively that many of the easier puzzles are just obvious forks. Don't ask how I know, though :P.