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Bell curve for chess puzzles

It woluld be interesting to see similar Bell curve available for players also for all 50k chess puzzles.

It would be probaly no surprise, when puzzles with say at least 30+ votes would be observed.
I asume that it would be similar curve like standard classical version, with mean around 1600 with 1/3 of puzzles around +/-100 and 2/3 of puzzles around +/-300.

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