Bug in daily960 rating for unrated player

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Tricky_Dicky

Match roster shows different rating value to API of player stats.

Seems to apply with a player new to C960 games and only unrated games in archieve

Example: @roywebbhastings


https://www.chess.com/stats/daily/chess960/roywebbhastings rating displayed as 400


In roster (Starting at 5pm today) Board #167

https://www.chess.com/club/matches/1334529/games?&p=2

rating displayed as 1200

https://api.chess.com/pub/match/1334529

{"username":"roywebbhastings","rating":1200,
"timeout_percent":0,"rd":350,"status":"basic"}

API stats https://api.chess.com/pub/player/roywebbhastings/stats

Rating shown as 400

"chess960_daily":{"last":{"rating":400,"date":1372872745,"rd":350},
"record":{"win":0,"loss":2,"draw":0,"time_per_move":8653,
"timeout_percent":0}}
stephen_33

I seem to remember that 1200 is the default rating given to players who haven't played sufficient rated games to have built one up? But the rating of 400 contained in the endpoint looks anomalous to me.

Mister_CK

I believe the default rating is either given by what a new player says their rating is or by what ratings they have in other disciplines. Regardless, it is a provisional rating, so it will change dramatically after a few wins/losses and the problem will fix itself. 

Tricky_Dicky

Initial rating is now a choice at sign up. What's even odder is that the web page stats shows the rating has dropped 800 points even though no rated games played.

Tricky_Dicky

No the problem won't fix itself. The rating will be resolved.

Mister_CK

yeah, and then everything is fine, right? Or is this causing bugs?

Tricky_Dicky

No the error shown was an example. The problem is still there for players in the same circumstance and the system will show an error. The fact that this players rating, and the next, will get resolved when they have finished a game does not fix the bug in the system.

stephen_33

Any idea where the rating of 400 comes from? Put another way, why does the system show a drop of 800 points?

Tricky_Dicky

I suspect now after some thought this is not an API bug, but a web page stats issue which is carried through to the members API stats and the web page match roster is still using the member selected start rate which carries through to the API match registration.

Tricky_Dicky

So the match has now started and the issue now shows as a difference for a number of players and probably all Daily 960 unraters. Here is a section of the roster and the equivalent API

Board No Name Rating Name Rating
168 finnkeddin 1200 medsteroni 1052
169 roywebbhastings 400 nimajnebula125 1043
170 orangez10 800 navipacrulz 1042
171 kwatson27 800 jebent 1039
172 morgz_f 800 tomengelhardt 1038
173 gooliver10 800 anthos1986 1036
174 gseekings 800 brianpawn 1037
175 ll2308 1189 classifiedking 1032
176 steadfast61 1187 gruumsh 1031
177 quiddity 1187 boboneill 1029
stephen_33

That's a mess!