Really love your chess puzzles, I play Puzzle Rush most days! If you can share, how many puzzles do you add each month? Are they mostly hand-generated or do you have some nifty way of deriving puzzles from real games automagically? Would also be really cool if a puzzle rush spread out puzzle types more it feels like there is heavy clustering of a specific problem type at key rating ranges: early puzzles (1-6) are very commonly back-rank checkmates; 9-12 are discovered check, etc - it would be nicer if the problem meta-tags were not re-used a lot within a single run.
Yeah overall some theme diversity. Would also be interested to know the median Elo rating by tag - since that'd serve a good sort of table-of-contents of order for people to learn chess tactics.
What is also pretty interesting would be a (fuzzed) per-tag Elo rating on the user - so they can see which themes you are good/bad at relatively (for example, if you constantly get problems on Trapped Pieces wrong your rating on those problems would be lower than your average Puzzle Rating).
Casper Schoppen broke all the previous records in puzzle rush (a mode where you get to solve as much puzzles as possible in 5 minutes) by memorizing most of high rated puzzles. After that chess.com decided to add a lot of new ones.
