I usually find in reports like this (and many others) something like:
... with a TPR of 2551 ...
I would like to know its meaning, and also what it stands for.
It means Tournament Performance Rating.
Very roughly a TPR of 2551 means that the results this player has achieved in this tournament would have been expected of a player rated 2551.
That's always a bit problematic. Say you scored 100% against a group of 1500 players, what kind of player would have expected to score that? Well, a 1900 player probably, but also a 2800 player. And many methods make your TPR go down if you win against a much lower rated player, because they are based on the average rating of your opponents. But it's a rough measure of how well a player did.
There exist various methods to calculate it that I don't have time now to go into now.
"Tournament performance rating". An approximate measure of the strength that a player performed/played at in the tournament.
The calculation of such a performance rating varies, but one method is as follows:
Then the tournament performance rating is calculated by taking the average performance out of all your games.