It is currently Sun Oct 25, 2020 4:17 am

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
Offline
 Post subject: ELO width of Tygem ranks
Post #1 Posted: Tue Sep 01, 2020 1:58 pm 
Dies in gote

Posts: 41
Liked others: 54
Was liked: 3
Rank: EGF 1 dan
Anybody has some idea/data?

How much does your winrate decrease when you rank up?
In my example of ranking up an account that I opened after a break:

Rank/games/winrate[%]
1k/13/77
1d/23/70
2d/20/70
3d/20/70
4d - I should play games instead of thinking about ELO :P

Top
 Profile  
 
Offline
 Post subject: Re: ELO width of Tygem ranks
Post #2 Posted: Tue Sep 01, 2020 11:16 pm 
Lives in gote

Posts: 327
Liked others: 139
Was liked: 91
Rank: EGF 3d
KGS: gennan
Tygem: gennan
OGS: gennan
Kaya handle: gennan
1: You getting a 70% score against Tygem 1d-3d suggests your Elo rating is roughly 150 Elo higher than the average of your opponents up to now.
2: The EGF does not use Elo ratings. The EGF rating system has rank widths of 100 GoR by definition, but 100 GoR does not equal 100 Elo. So EGF ranks typically are not 100 Elo wide and an answer to your question may not be really meaningful in terms of EGF ranks or any other go rating system.
3: Tygem does not use Elo ratings either.
4: It seems that Tygem ranks are pretty much all over the place, because there are many sandbaggers and cheaters, most games are blitz and newcomers can set their initial rank to what they want (up to 3d).

That being said, according to this OGS 2018 survey, Tygem 1d-8d roughly corresponds to the range of EGF 4k-5d and Tygem 4d roughly corresponds to EGF 1d.

Top
 Profile  
 
Offline
 Post subject: Re: ELO width of Tygem ranks
Post #3 Posted: Wed Sep 02, 2020 1:13 am 
Dies in gote

Posts: 41
Liked others: 54
Was liked: 3
Rank: EGF 1 dan
Thank you gennan for useful information.

I know Tygem does not use Elo, but effectively one could try to use Elo to describe the system.

For instance, compute the average winrate in even games between random players from ranks G and G+1, which then translate to "Elo width" of rank G.
This probably depends on G.

Then one can repeat the same for players from G-1 and G+1, and see if Elo model applies (which would suggest the Elo width of 2 ranks is twice the width of one rank).


But my data is obviously insufficient to describe it.

One could guess from the Tygem's promotion system, that the first winrate should be around 65%, since one needs 70% winrate for promotion in some streak. This would correspond to Elo width of ~ 100. But I have no idea if this is indeed the case.

Top
 Profile  
 
Offline
 Post subject: Re: ELO width of Tygem ranks
Post #4 Posted: Wed Sep 02, 2020 1:42 am 
Lives in gote

Posts: 416
Liked others: 97
Was liked: 131
Rank: igs 4d
marvin wrote:
since one needs 70% winrate for promotion in some streak.
Note that the threshold is different according to the level: to promote from 5d to 6d you need to win 15 of your last 20 games (75%).

Top
 Profile  
 
Offline
 Post subject: Re: ELO width of Tygem ranks
Post #5 Posted: Wed Sep 02, 2020 12:00 pm 
Lives in gote

Posts: 327
Liked others: 139
Was liked: 91
Rank: EGF 3d
KGS: gennan
Tygem: gennan
OGS: gennan
Kaya handle: gennan
Earlier this year I analysed the 1 million tournament game results in the EGD (spanning the time period 1996-2019) and used logistic regression to calculate the Elo widths of EGF ranks. It does vary over time, but overall it roughly looks like this:
Code:
EGF rank      Elo width per rank => Winrate when 1 full rank apart
--------      ------------------    ------------------------------
   13k              50               57%
    4k              60               58%
    2k              70               60%
    1k              80               61%
    1d             100               64%
    2d             110               65%
    3d             120               67%
    4d             135               69%
    5d             150               70%
    6d             170               73%
    7d             200               76%
Someone else found similar results: https://wismuth.com/elo/calculator.html (see Elo per stone in go on that page).


This post by gennan was liked by: marvin
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 8 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group