what's the average difference between the lychess elo and the elo fide in a player?

@Sacmaniac @AnonymousChessKing @Benedek-OV @jaqueatumadre @TalMagicalDragon
i am still in school. intrigued by this, i tried to find a mathematical base point to even compare the both ratings. see, the glicko system, which lichess uses has a factor called R.D (relative difference) and Time decay.While elo doesnt have these factors. Rating difference is the range of rating change keeping in mind the uncertainity of result/ Which means its a list of total possibilities of rating change if you won, lost or drew, with subject to the opponents, rating and R.D, which is in turn affected by his time decay. Time decay refers to the increase of Rating difference if you have not played for a long time, or decrease of R.D when u play constantly. R.D is a big factor with Time decay as a sub factor, making the formula more complex than complex,
Thus we conclude we cant compare player skill between lichess and Fide/Uscf.

We have to keep in mind that time decay, which affects the R.D of both the players playing a match, has infinite permutations and combinations, making comparisions kind of pointless.

When we talk about chess.com, we are not taking into account that chess.com follows the glicko system too, BUT, the rating starts from 1200. Now in general math, the diffference in starting points is 300, BUT, in such a complex math formula with sets, rating uncertainities, and time decay affecting the R.D , the difference of 300 points does not mean 300 at all!,. this being a complex formula, if the difference in 2 starting ratings would be 200 (supposedly), the R.D would change in an indefinite manner. Thus even if we try to compare the lichess ratings to chess.com ratings, the fact that chess.com ratings start 300 points before lichess rating and a factor of time decay affecting the R.D in turn. makes them truly, apples and oranges.
The whole mess of rating systems being non-comparable is because of the time decay which affects the R.D

Now if we talk about surveys, they are just information which change from time to time with change in rating trends, and cannot give a satisfying idea.

I will keep editing this as i get more information

@Kling_Asymmetric

Now that you mention it, it brings up the fact that I failed grade 9 math twice, was sent to Summer School and failed it there too. Then I was placed in a Reform School and learned some trades and how to deal with the most difficult personalities you could imagine for my age.

Math for me might as well be Greek poetry written in ancient Latin or Mandarin. That said, I'm still trying to figure out the implications of the double slit experiment in Quantum Mechanics because it's only been 7 years of lost sleep pondering it, and my sanity.

The whole ratings things is beyond my comprehension and far outside my wheelhouse. But I appreciate your continued interest in solving this problem of comparative ratings between different systems and populations. The plot thickens.

"A wavicle?! My God!"

@MrPushwood A wavicle, that's a good one, I get it, perhaps millions wouldn't but I do. This ratings things is just another measurement problem, I suppose.