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### #ActualBoulougou

Posted 18 April 2013 - 06:03 AM

I had a quick look at the pdf. Are you sure phi = 50 is reasonable, the pdf divides the RD by 173.7178 (for some reason) to get phi.

Thanks for the reply, you are right. Silly mistake, I should have first scale the deviation before applying the formula and then rescale again as the document says. The correct value for the new deviation is 124.646889. That seems more reasonable.

However, this means that it takes 10 years(120 rating periods, assuming one rating period is one month) for deviation to increase from 50 to 124.646889. What if I would like to keep the same rating period(one month), but I would like deviation to increase more rapidly? I think Glicko1 had some constant that could adjust this. I cannot find a similar constant for Glicko2. It has to be some way, otherwise the algorithm would be quite constraining.

### #2Boulougou

Posted 18 April 2013 - 06:02 AM

I had a quick look at the pdf. Are you sure phi = 50 is reasonable, the pdf divides the RD by 173.7178 (for some reason) to get phi.

Thanks for the reply, you are right. Silly mistake, I should have first scale the deviation before applying the formula and then rescale again. The correct value for the new deviation is 124.646889. That seems more reasonable.

However, this means that it takes 10 years(120 rating periods, assuming one rating period is one month) for deviation to increase from 50 to 124.646889. What if I would like to keep the same rating period(one month), but I would like deviation to increase more rapidly? I think Glicko1 had some constant that could adjust this. I cannot find a similar constant for Glicko2. It has to be some way, otherwise the algorithm would be quite constraining.

### #1Boulougou

Posted 18 April 2013 - 05:49 AM

I had a quick look at the pdf. Are you sure phi = 50 is reasonable, the pdf divides the RD by 173.7178 (for some reason) to get phi.

Thanks for the reply, you are right. Silly mistake, I should have first scale the deviation before applying the formula. The correct value for the new deviation is φ' = 124.646889. That seems more reasonable.

However, this means that it takes 10 years(120 rating periods, assuming one rating period is one month) for deviation to increase from 50 to 124.646889. What if I would like to keep the same rating period(one month), but I would like deviation to increase more rapidly? I think Glicko1 had some constant that could adjust this. I cannot find a similar constant for Glicko2. It has to be some way, otherwise the algorithm would be quite constraining.

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