### PursuitOfHappiness's blog

By PursuitOfHappiness, 3 months ago,

Previously we used to see,if rating predictor predict +90 delta then finally codeforces would give 100+ delta. But now if rating predictor predics +90 delta codeforces are giving +80 delta.I think, codeforces rating calculation have just changed.

Anyone facing the same??

• -6

 » 3 months ago, # |   -9 yea I have noticed past 3 4 contests that predictor is not working fine nowadays.
•  » » 3 months ago, # ^ |   -16 Or the codeforces rating system has changed??
•  » » » 3 months ago, # ^ | ← Rev. 3 →   0 If this is the case then they would have informed us there must be some problem with apis.
•  » » » » 3 months ago, # ^ |   -10 may b codeforces became greedy of giving rating \$
 » 3 months ago, # |   0 I guess the rating calculation system has changed a little bit because I've observed that when I got around same rank(and rating) in a previous div 2, I got +19 but in the Global Round 16 instead of getting a positive delta(according to cfpredictor) , I got -4
•  » » 3 months ago, # ^ |   0 Yeah..faced the same
•  » » 3 months ago, # ^ |   0 thats because in div2 rounds , the rating is calculated on the basis of only div2 participants even though the rankings show div1+div2. but in global rounds div1 is also included
•  » » » 3 months ago, # ^ |   0 I'm talking on the basis of rankings only for div2. Whereas in the global round the rating increase should be higher as it has both div1 and div2 participants.
 » 3 months ago, # |   +6 Rating predictor is a ratist, won't calculate it for newbies anymore. Anyways enjoy positive delta while you still can.
 » 3 months ago, # |   0 Maybe for expample in edu round you solved 2 problems and if problem B(for example) solved only 5000 participants and you are 4000 th(for example) predictor will show you +90(for example) and after round you will get +90(for example) officially. But if B solved ~8000 participants and you are 3000th predictor will show you +90(for example) . But you will get +60 because cf rating system knows that problem was easy . I think. I really do not know how predictor works . If you know please write it . Just my idea. Sorry for my bad english .
•  » » 3 months ago, # ^ |   0 The terms and conditions you are saying it's also maintained by CF predictor. But something fishy is happening
 » 3 months ago, # |   +8 Use carrot instead, it's better
•  » » 3 months ago, # ^ |   0 didn’t know about that