Change is the only constant
Several days later, the problem is not fixed...

Did you saw that half an hour ago the leaders were completely giving wrong players top 20
YES, the leaderboards are absolute bullshit right now. I'm 10th in blitz instead of 60th, lol.

the leaderboards don't mean a thing now
yes, because the leaderboards restarted... it's not a big deal and it'll be fine after a week or so
a bit of transparency from chess.com would've been though

Another point: the coordinates are not visible anymore... VERY unpleasant.
they're inverted, turn off coordinates in settings to turn them on (yes, I also have no idea what's going on)

Another point: the coordinates are not visible anymore... VERY unpleasant.
they're inverted, turn off coordinates in settings to turn them on (yes, I also have no idea what's going on)
Doesn't work here, I've of course tried that already

I've lost 4 games today because I just can't move pieces......They've completely broken the game.
I'm sorry to hear that. Unfortunately I cannot help you with this because there are no details provided and others including myself can move pieces on both desktop and mobile.
@Indipendenza I tried multiple devices and accounts and don't see any issues with coordinates missing, again on both desktop and mobile.

I keep losing, it's glitching saying, in the middle of a game, it can't read the FEN4
Please provide more details. Is it on mobile or desktop, what game number, how many times has this happened.

@Indipendenza I tried multiple devices and accounts and don't see any issues with coordinates missing, again on both desktop and mobile.
I confirm, on my normal plain vanilla laptop, used for 5 years with no trouble on 4p Chess, and with Chrome, I definitely do NOT have the coordinates anymore (since the last update), whatever the setting (on or off, as per suggestion above).
I know that we have a "bug" thread (where I also wrote a couple things), but sorry, our MAIN VARIANT is simply the basic and usual FFA. And it doesn't work properly.
Sincerely, HOW COME changes are done to something that has worked for YEARS? And how come anything is changed without due tests and controls before uploading it to the server? It looks so terribly unprofessional.
As of today, there are many problems that appeared after ther recent upload. And sincerely I do not care a lot about small hobbies and sub-variants (I sympathise with those who love them though), like FOW, WFT, etc. Let's fix FIRST the main FFA issues:
a) there are very annoying points (showing possible moves), and it's impossible to remove them,
b) the zombie king is not shown as previously,
c) there is no more specific sound when it's YOUR move, it's terribly confusing and I've lost several bullet games because of that already whereas I seldom flag at all,
d) the pieces eaten are no more shown (!!!),
e) the button "Claim win" appears for all, not only for the player who is entitled to claim...
Guys, why on Earth are you changing something that works well?