Puzzle scoring questions • page 1/1 • General Chess Discussion • lichess.org

As I understand, puzzles are tailored to our puzzle rating. If most people around your ability get the puzzle right, and so do you, you get a few points. If most people get it right but not you, you lose a lot of points. The converse is also true.

If a puzzle is worth 20 points. If 3/4 of the people get it right, and so do you, you get 5 points. If you get it wrong, you lose 15 points.

Do I have the general idea of puzzle scoring? Is each puzzle worth 20 or 21 points? I ask because I see a lot of puzzles I solve (or don't solve) are worth 9, 10, or 11 points which I infer to mean is that each puzzle is worth roughly twice that.

This has no bearing whatsoever, but I'm just trying to understand and was hoping the good people here could help!

As I understand, puzzles are tailored to our puzzle rating. If most people around your ability get the puzzle right, and so do you, you get a few points. If most people get it right but not you, you lose a lot of points. The converse is also true. If a puzzle is worth 20 points. If 3/4 of the people get it right, and so do you, you get 5 points. If you get it wrong, you lose 15 points. Do I have the general idea of puzzle scoring? Is each puzzle worth 20 or 21 points? I ask because I see a lot of puzzles I solve (or don't solve) are worth 9, 10, or 11 points which I infer to mean is that each puzzle is worth roughly twice that. This has no bearing whatsoever, but I'm just trying to understand and was hoping the good people here could help!

glbert

edited

#2

puzzles are scored the same way players are scored. if a player has the same rating as you, you have a 50% chance of beating them. if a puzzle has the same rating as you, you have a 50% chance of solving it.
so if you have a question about "puzzle scoring", you have the same question about "player scoring". just to be clear about this, because people seem to treat it like puzzle ratings are something new and different.

the exact math of how many points you gain/lose and your exact chance of solving a puzzle depends on:
your rating, the puzzle rating, your rating deviation, the puzzle rating deviation. (again, if you are playing a chess game against another player, the rating changes depend on the same things, just substitute "opponent" for "puzzle".)

you could calculate what a puzzle is "worth" to you if you had all of these 4 values (but to the best of my knowledge, the deviations are not public currently).
the exact formulas to work it out are here: https://en.wikipedia.org/wiki/Glicko_rating_system

edit: or here: https://github.com/ornicar/lila/blob/e8b76303b87a0bdb5fc6d4f6287aba297243ac2d/modules/rating/src/main/Glicko.scala

puzzles are scored the same way players are scored. if a player has the same rating as you, you have a 50% chance of beating them. if a puzzle has the same rating as you, you have a 50% chance of solving it. so if you have a question about "puzzle scoring", you have the same question about "player scoring". just to be clear about this, because people seem to treat it like puzzle ratings are something new and different. the exact math of how many points you gain/lose and your exact chance of solving a puzzle depends on: your rating, the puzzle rating, your rating deviation, the puzzle rating deviation. (again, if you are playing a chess game against another player, the rating changes depend on the same things, just substitute "opponent" for "puzzle".) you could calculate what a puzzle is "worth" to you if you had all of these 4 values (but to the best of my knowledge, the deviations are not public currently). the exact formulas to work it out are here: https://en.wikipedia.org/wiki/Glicko_rating_system edit: or here: https://github.com/ornicar/lila/blob/e8b76303b87a0bdb5fc6d4f6287aba297243ac2d/modules/rating/src/main/Glicko.scala

chummer

#3

@glbert Always happy to be set straight! Thank you both for the answer, and for providing links for me to dig in deeper. You're a good man, Charlie Brown!