Announcing Tornelo Rating System

[MichaelBaron]

Today, we used Tornelo at MCC allegro as always. I discovered that some players ratings (including mine) got increased ...by rather ''random'' number of points..while others have not. I was 2280...but discovered my new rating was 2325. Alex Khamatgaleev was 2220 - but skyrocketed to 2350. Jack Puccini was 2210...but got no increase at all. So yes...an interesting ''rating upgrade'' indeed .

[Kevin Bonham]

Today, we used Tornelo at MCC allegro as always. I discovered that some players ratings (including mine) got increased ...by rather ''random'' number of points..while others have not. I was 2280...but discovered my new rating was 2325. Alex Khamatgaleev was 2220 - but skyrocketed to 2350. Jack Puccini was 2210...but got no increase at all. So yes...an interesting ''rating upgrade'' indeed .

There is something funny going on because the historic ratings are now different to those in place when I wrote #42 above. And there is a rating adjustment showing for 1 Jan 2017 but when I was writing the posts above, the most recent adjustment was years earlier. So there was a retrospective adjustment, not sure when.

What has happened this time is that rather than swiping someone else's rating list, they've simply thrown points into the system so that everyone who was active enough - and it's not completely clear how this was defined - got either 132 or 133 points backdated to Jan 1 2017. I am not sure why that number but it's almost identical to the 131.5 point average FIDE to Tornelo gap for the four players I mentioned in #42.

Because Tornelo is deflationary, pretty much all the adults and even some of the juniors are showing as having lost points since this Jan 2017 adjustment and some adults like Partsi and Raine have even managed to lose the whole adjustment in just over a year.

[MichaelBaron]

There is something funny going on because the historic ratings are now different to those in place when I wrote #42 above. And there is a rating adjustment showing for 1 Jan 2017 but when I was writing the posts above, the most recent adjustment was years earlier. So there was a retrospective adjustment, not sure when.

What has happened this time is that rather than swiping someone else's rating list, they've simply thrown points into the system so that everyone who was active enough - and it's not completely clear how this was defined - got either 132 or 133 points backdated to Jan 1 2017. I am not sure why that number but it's almost identical to the 131.5 point average FIDE to Tornelo gap for the four players I mentioned in #42.

Because Tornelo is deflationary, pretty much all the adults and even some of the juniors are showing as having lost points since this Jan 2017 adjustment and some adults like Partsi and Raine have even managed to lose the whole adjustment in just over a year.

From the practical perspective: it has affected the seeding at today's allegro...

[Kevin Bonham]

I see the deflation problem for the adults frequently playing MCC allegros continues unabated. Supposedly Ryjanova, Baron, Kolak, Khamatgaleev, Savige, Chmiel, Tosevski etc are on average over 100 points worse players this year than last year.

[MichaelBaron]

I see the deflation problem for the adults frequently playing MCC allegros continues unabated. Supposedly Ryjanova, Baron, Kolak, Khamatgaleev, Savige, Chmiel, Tosevski etc are on average over 100 points worse players this year than last year.

Correct. About once a year, everyone's rating gets a ''boost'' by the ''tournelo people''..then they all start going down again

[Kevin Bonham]

Correct. About once a year, everyone's rating gets a ''boost'' by the ''tournelo people''..then they all start going down again

Overdue for another boost. I won't say how large it should be this time. Surprise me.

[antichrist]

it is due to no one new or higher rated to steal points from so a sort of inbred situation?

[Kevin Bonham]

it is due to no one new or higher rated to steal points from so a sort of inbred situation?

This can happen if the strong players are taking draws with weaker players to win tournaments, but I don't think it's that. It could be a combination of:

* more juniors and young adults than older adults
* low k-factor
* zero sum game system
* no rating floor

Systems with this combination of characters are likely to deflate because the ratings of juniors are too affected by their initial performance and juniors who drop out may do so before their ratings catch up with their strength let alone ever exceed it.

[Patrick Byrom]

Giving juniors a higher k-factor is a simple way to lessen the problem.

[Kevin Bonham]

Giving juniors a higher k-factor is a simple way to lessen the problem.

Yes, provided that you have accurate age information rather than half the players with no age info and one-year-old WGMs.

[Kevin Bonham]

Overdue for another boost. I won't say how large it should be this time. Surprise me.

Ah so apparently working out how to do a uniform boost was too hard. A few stronger players including Michael Baron, Julia Ryjanova and Alexej Khamatgaleev have had their rating reset to their ACF classic rating effective 1 December 2019. I am not sure if anything has happened to the others but I do notice that the size of the 1 Jan 2017 adjustment is no longer as large as it was when I first noticed it.

[MichaelBaron]

Tornelo1.jpg
The image above shows my rating as different from the image in the next post (can not upload both at once due to upload file size quota)
As evident, both ratings are ''current''. I guess its not a bug that impacts my rating alone but a consistent discrepancy that may impact the rating system all together.

[MichaelBaron]

Sigh, having trouble uploading the 2nd image (no idea why the file size is bigger than the first one)...but it shows my rating as 2297.


https://tornelo.com/chess/players