deleting a message.

You can't delete it from the recipient. If you're on the website, you can delete it from your side only by clicking the X on the right side of the message.

But there is a friend deleted messages from my inbox. Ho did they do it?
They didn't. They may have been muted and when that happens all their content is hidden until the account is um-muted.

There is a possibility that they contacted staff to remove it from both boxes. There's no other way to remove something from another member's messages.

How can i do that?
Contact support?
https://support.chess.com/collection/343-contact-us
Though, they most likely won't do that unless it's a very special circumstance.

I think there is another way to delete messages from the recipient, bcoz messages deleted are usual. If u know a way, tell me!
As mentioned deleting a message only does it from your side. The other side isn't impacted.

No one here knows how?
You can't do it. It's not possible, at least not outside of a staff member doing it.

#13 u sure u know how? sounds like ya dont since u aint tellin us, which is what most ppl do.
There isn't a way to do what's being asked. Simple as that. There's zero reason for the site to implement that capability; allowing it would make abuse easier to hide

Ok, but surely there is someway.
You can request staff to do it but that is something that would depend on the situation and in most cases, probably wouldn't be done. That's the only way.