@GennadyBukin I have a hypothesis that doesn't involve quantum mechanics: Looking at all of your ratings it seems that Lichess' Glicko 2 (
en.wikipedia.org/wiki/Glicko_rating_system) rating system produces real numbers (or at least rational numbers) as your rating. However on your profile overview Lichess only displays nonnegative integers.
I guess Lichess arrives at these integers by using the floor function (
en.wikipedia.org/wiki/Floor_and_ceiling_functions) on the real (or rational) ratings, which is useful because it prevents overestimating the true rating on the overview page.
As to why the real (or rational?) rating of (seemingly) 2375.00 is rounded down to 2734, I can only assume that to add to the aforementioned Lichess also rounds the real (or rational?) rating to the two closest decimal digits on the more detailed page for bullet. So your real rating is always hidden and only displayed to two decimals accuracy.
Your real rating is probably something like 2374.998... . Rounding to the two closest decimal digits gives 2375.00 (detailed page), but applying the floor function for the overview page yields the positive integer 2374.
