How to calculate the Performance Rating when there are opponents with 0 (international rating)?

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Nofunatall3

Under FIDE rules.

I'm looking at the result of an amateur tournament where a well-known streamer in my country achieved a National Master norm, but there are things I don't understand about the Performance Rating.

The numbers are:

Rating Opp;  result

Bye    1

1663  0

1624  1

1620  0.5

1669  1

1729  1

0         1

Performance Rating by Chess-Results: 1725

Another thing: does a national amateur tournament organized by the Confederation of a country give Fide ratings to participants?

Nofunatall3

You're right, and I totally agree with your opinion. But I just want to understand this Performance Rating result.

I don't know how to calculate the average rating of opponents with a "bye" and another unrated player.

tygxc

Score against rated = 3.5 / 5 = 70% -> +149

Average rating of rated opponents: (1663 + 1624 + 1620 + 1669 + 1729) / 5 = 1661

Tournament performance rating = 1661 + 149 = 1810

 

Nofunatall3
tygxc escreveu:

Score against rated = 3.5 / 5 = 70% -> +149

Average rating of rated opponents: (1663 + 1624 + 1620 + 1669 + 1729) / 5 = 1661

Tournament performance rating = 1661 + 149 = 1810

Thanks!
Considering the entire tournament, it was 5.5 / 7 and PR 1725 (by Chess-Results).
Why 1725?

tygxc

@5
Of the 7 round 1 was a bye and 1 was unrated.
If you include the unrated then 4.5 / 6 = 75% -> +193
https://handbook.fide.com/chapter/B022022 
1661 + 193 = 1854
So I guess Chess-Results takes the unrated at some default rating 1000
1551 + 193 = 1744

Nofunatall3

Yeah, I think it's something like that. Thank you, @tygxc!
Sorry, I'm a little paranoid about numbers, especially when they don't exactly fit.

This guy doesn't have a FIDE rating, so his 'Ru' will be 1701? Or 1611? (1661+40 |1551+60)

tygxc

@7
8.2.2      Ra is the average rating of the player's rated opponents.
Thus Ra = 1661

Nofunatall3

8.2.3      If the player scores 50%, then Ru = Ra.
If they score more than 50%, then Ru = Ra + 20 for each half point scored over 50%.
If they score less than 50%, then  Ru = Ra + dp
Ru is rounded to the nearest whole number.

1661 + ((3.5-(5/2)) / 0,5) * 20  = 1701