How do you calculate your Tournament Performance Rating?

I can think about two different ways to answer my question:

  1. Do you know the formula for calculating your TPR (FIDE or USCF)?

  2. Can you link me to a FIDE TPR calculator and then a USCF TPR calculator?

    • I recall that rating change calculators have this TPR function.

TPR calculators and expected rating change.

http://englishchess.org.uk/Juniors/tournament-performance-calculator/ http://www.uschess.org/content/view/13146/836/

Basically Performance rating is the average of your opponent's ratings with an adjustment based on the score of the game. For each win, you add your opponent's rating + 400, a draw is just your opponent's rating, and a loss is your opponent's rating - 400. There is an exception for a perfect score, then the adjustment is 800.

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    The links are nice, but the explanation you provide doesn't match with the results from the calculators. In the USCF, a perfect score gives an adjustment of 400, not 800. And rating plus or minus 400 for non-perfect scores might be a crude estimate, but it is by no means the formula they actually use, for either USCF or FIDE. – D M Jul 31 '17 at 17:14
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    Watching FIDE tournaments gives the adjustment. I watched neither a USCF nor an England tournament, so I can't verify those. I do know that USCF uses a percentage likely to win to find their adjustment. – Fred Knight Jul 31 '17 at 17:38

Section 1.48 of the FIDE Title Regulations effective from 1 July 2017 specifies how the performance rating is calculated. The average rating of the opponents is adjusted by a value determined by looking up the percentage score in a table.

For example, after Round 12 of the 2018 Candidates Tournament, Ding Liren had 6.5 out of 12 points, for a rounded percentage score of 54%. According to the table, this corresponds to an adjustment of +29. The rounded average rating of his opponents was

(2763 + 2 * 2794 + 2 * 2809 + 2 * 2767 + 2 * 2784 + 2 * 2799 + 2800) / 12 ~= 2789,

so his performance rating at this point was 2789 + 29 = 2818, as you can see in this screenshot:

enter image description here

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