It takes both yours and puzzle's rating in consideration while calculating. Just... | Hacker News

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		avadhesh18 5 months ago \| parent \| context \| favorite \| on: Show HN: OffChess – Offline chess puzzles app It takes both yours and puzzle's rating in consideration while calculating. Just below the chessboard you can see "+12 -10" that means this puzzle will gain you 12 points if you solve this or you will lose 10 points if you fail. The system is based on ELO with the main difference being that the K factor in OffChess is variable, https://en.wikipedia.org/wiki/Elo_rating_system

mijoharas 5 months ago [–]

Sorry to post on an older thread, but how is difficulty of puzzle calculated?

Trying to get a feel for the rating system.

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