How is it determined ?
Because, for example, the following puzzle is rated 2168, while the solution is totally evident (I desperately searched for any subtetly). On the other hand, other puzzles are rated below 2000 while needing an accurate & long move sequence...
lichess.org/training/62064It's determined by the people that succeed and fail the puzzle. It's the same rating system as for games, and you can see it like you are "playing a game" against the puzzle and if you succeed the puzzle, you "win" and the puzzle "loses" and the ratings are adjusted accordingly.
I thought the puzzle's rating was fix and "objective", only the player's one changing...
Rating (Elo) always depends on the pool. Those chess numbers are never "objective", how to calibrate?
@Sarg0n Well, some objective and rough calibration is possible (as in the old tactics books where you have to solve similar puzzles during a given time, which gaves you your ELO estimation). But I agree, it is hard to implement automatically...
Some people probably play 32. Rh2, whose refutation isn't completely trivial.
Uhm guys, you know: if you fail a puzzle in the 10. move which is a complicated situation, this is no ounce better than failing the obvious first move...
#6, yeah, I saw that. Bb7 makes some stress...
