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Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 05:38
by computerrank
mike1989 wrote:Wladimir Klitschko in 2012 in annual not rank No. 2 and No. 1 the downgrade it happened 13.01.02. not 12.12.31. from 11.07.02. 1 year 6 months after the fight with David Hay
For computational reasons all dates are converted to Universal Time = days since Universal Time on January 1, 4713 BCE
julian date Haye bout = julian date (2011-07-02) = 2455745
julian date end of 2012 = julian date (2012-12-31) = 2456293
difference = 548 days
1.5 years = 365.24 days per year * 1.5 year = 547.86 days
So the Haye bout lost validity exactly on 2012-12-31 - and Wladimir Klitschko's rating dropped.
The second of the year has more days than the first one and in addition 2012 was a leap year.
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 05:53
by computerrank
Leonid wrote:I see HWs took a hit in their absolute current rating points, which made it worse for them in the p4p ratings. But the numbers were already very low if we take a look at the past.
Does this influence the all time rankings in the part of 14% of career top rating? I never got how this all-time works, ie. #1 boxer beat #2 in the year and got additional (200/1)*33% + (200/2)*33% for the year? It means 99 points maximum for the year? I remember maximum of 200 points per year mentioned by Computerrank. How is that?
And if 14% of career top rating means 14% * highest number of active rating point, then Marchiano gets 14%* 5705 = 800 points just for that, plus 500 for his entire carreer (5 years at the top * 99 maximum per year). And Wlad gets more like 1000 for his carrear plus only 133 for 14% of 953 (carreer top) to arrive at lower than Rocky in total?
example for a boxer:
2014: #5 at his division cluster at end of the year, his best not lost to opponent was #9 at time of bout
2015: #2 at his division cluster at end of the year, his best not lost to opponent was #6 at time of bout
His highest career rating was 300.
- ranking points: 200/5 = 40 for 2014, 200/2 = 100 for 2015 - sum is 40+100 = 140 - 33% go into the all time rating = 0.33 *140 = 47 points
- opponent rank points: 200/9 = 22 for 2014, 200/6 = 33 for 2015 - sum is 22+33 = 55 - 33% go into the all time rating = 0.33 *55 = 18 points
- career top rating: 300 - 14% go into the all time rating = 0.14*300 = 42 points
All time rating = 47 + 18 + 42 = 107 points.
-
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 10:23
by computerrank
computerrank wrote:mike1989 wrote:all right, when you update the rankings of all-time ???
I will first have a look into some other issues. As soon as the corrected version is completed and launched, I will post a message here ... thanks a lot

New release is active now ...
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 10:41
by Leonid
computerrank wrote:Leonid wrote:I see HWs took a hit in their absolute current rating points, which made it worse for them in the p4p ratings. But the numbers were already very low if we take a look at the past.
Does this influence the all time rankings in the part of 14% of career top rating? I never got how this all-time works, ie. #1 boxer beat #2 in the year and got additional (200/1)*33% + (200/2)*33% for the year? It means 99 points maximum for the year? I remember maximum of 200 points per year mentioned by Computerrank. How is that?
And if 14% of career top rating means 14% * highest number of active rating point, then Marchiano gets 14%* 5705 = 800 points just for that, plus 500 for his entire carreer (5 years at the top * 99 maximum per year). And Wlad gets more like 1000 for his carrear plus only 133 for 14% of 953 (carreer top) to arrive at lower than Rocky in total?
example for a boxer:
2014: #5 at his division cluster at end of the year, his best not lost to opponent was #9 at time of bout
2015: #2 at his division cluster at end of the year, his best not lost to opponent was #6 at time of bout
His highest career rating was 300.
- ranking points: 200/5 = 40 for 2014, 200/2 = 100 for 2015 - sum is 40+100 = 140 - 33% go into the all time rating = 0.33 *140 = 47 points
- opponent rank points: 200/9 = 22 for 2014, 200/6 = 33 for 2015 - sum is 22+33 = 55 - 33% go into the all time rating = 0.33 *55 = 18 points
- career top rating: 300 - 14% go into the all time rating = 0.14*300 = 42 points
All time rating = 47 + 18 + 42 = 107 points.
-
How do you get 300 (career top rating) in the example and what's the maximum here? Is it the highest of any current ratings at any point or of any year's highest total of own and opponent ranking points? I'd much rather see it on the example of Marciano's carreer, since I don't get how he got to 1310 all-time if the most one can add to his all-time in 1 year seems to be 100 points (200/1*33%+200/2*33%) and his carreer was quite short.
And thanks for taking time to make explainations in this thread))
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 11:22
by computerrank
Leonid wrote:How do you get 300 (career top rating) in the example and what's the maximum here? Is it the highest of any current ratings at any point or of any year's highest total of own and opponent ranking points? I'd much rather see it on the example of Marciano's carreer, since I don't get how he got to 1310 all-time if the most one can add to his all-time in 1 year seems to be 100 points (200/1*33%+200/2*33%) and his carreer was quite short.
And thanks for taking time to make explainations in this thread))
- career top rating is the highest value of the current rating at any time of the career
- Marciano had a top rating of 5706 points after the last bout of his career (other boxers show a career high earlier in their career and later drop)
So he gets 14% of 5706 = 799 points for this
- for every year's end at top of his division cluster he gets 200/1*0.33 = 67 points
- for every year with a not lost bout against #1 he gets 200/1*0.33 = 67 points. (To be precise here. The divisor is 1 for a #1 AND ALSO for a #2 opponent - and the divisior is n-1 for a #n opponent - this compensates for the situation, when the boxer is #1 and so cannot fight #1)
- so the rest of his 511 points come from these up to 133 points per year. I wll add a table with his annual standings.
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 11:37
by computerrank
... and here is Rocky Marciano:
Code: Select all
Heavyweight 1951 2082 352 28 33 291 9032 Rocky Marciano
Heavyweight 1952 3512 684 94 99 492 9032 Rocky Marciano
Heavyweight 1953 3999 841 160 121 560 9032 Rocky Marciano
Heavyweight 1954 4027 943 226 154 564 9032 Rocky Marciano
Heavyweight 1955 5706 1311 292 220 799 9032 Rocky Marciano
- the column with 799 at the end - career top rating
- the column with 220 at the end - accumulated points for top opponent ranks
- the column with 292 at the end - accumulated points for top year's end ranks
the numbers are rounded here a bit different in this excerpt
![[icon_e_biggrin.gif] :D](./images/smilies/icon_e_biggrin.gif)
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 17:00
by Leonid
computerrank wrote:... and here is Rocky Marciano:
Code: Select all
Heavyweight 1951 2082 352 28 33 291 9032 Rocky Marciano
Heavyweight 1952 3512 684 94 99 492 9032 Rocky Marciano
Heavyweight 1953 3999 841 160 121 560 9032 Rocky Marciano
Heavyweight 1954 4027 943 226 154 564 9032 Rocky Marciano
Heavyweight 1955 5706 1311 292 220 799 9032 Rocky Marciano
- the column with 799 at the end - career top rating
- the column with 220 at the end - accumulated points for top opponent ranks
- the column with 292 at the end - accumulated points for top year's end ranks
the numbers are rounded here a bit different in this excerpt
![[icon_e_biggrin.gif] :D](./images/smilies/icon_e_biggrin.gif)
Thanx. This is actually how I got it from the beginning, but I though I must have misinterpreted smthn, cause this seems really unfair. Rocky got more than 60% of his all-time rating just for being #1 in a division, where everyone at HW had sky-high current ratings. HW boxers had almost 10! times more points int their "active" ratings than they have today (#1 Marciano had 5706, while #1 Fury has 650), which means that division must have been 10 times stronger than the current scene. Wlad never had a chance to get anywhere near those kind of points for his career top rating no matter who he beat. Imagine Wlad had a chance to beat old middleweight Archie Moore and get his points. That missmatch would be just awfull, but the result would bring Wlad hundreds of additional all-time points and lift him up many places in the computerised all-time standings (both HW and p4p).
Anyways, "active" ratings of past and modern divisions differ way too much to be factored in all-time ratings, 50s were not the best HW era as it appears to be according to such ratings, but one of the weekest (maybe due to being post-war), therefore I'd suggest to remove this 14% of carreer top ranking from the formula at all.
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 17:12
by Leonid
Leonid wrote:computerrank wrote:... and here is Rocky Marciano:
Code: Select all
Heavyweight 1951 2082 352 28 33 291 9032 Rocky Marciano
Heavyweight 1952 3512 684 94 99 492 9032 Rocky Marciano
Heavyweight 1953 3999 841 160 121 560 9032 Rocky Marciano
Heavyweight 1954 4027 943 226 154 564 9032 Rocky Marciano
Heavyweight 1955 5706 1311 292 220 799 9032 Rocky Marciano
- the column with 799 at the end - career top rating
- the column with 220 at the end - accumulated points for top opponent ranks
- the column with 292 at the end - accumulated points for top year's end ranks
the numbers are rounded here a bit different in this excerpt
![[icon_e_biggrin.gif] :D](./images/smilies/icon_e_biggrin.gif)
Thanx. This is actually how I got it from the beginning, but I though I must have misinterpreted smthn, cause this seems really unfair. Rocky got more than 60% of his all-time rating just for being #1 in a division, where everyone at HW had sky-high current "active" ratings. HW boxers had almost 10! times more points int their "active" ratings than they have today (#1 Marciano had 5706, while #1 Fury has 650), which means that division must have been 10 times stronger than the current scene. Wlad never had a chance to get anywhere near those kind of points for his career top rating no matter who he beat. Imagine Wlad had a chance to beat old middleweight Archie Moore and get his points. That missmatch would be just awfull, but the result would bring Wlad hundreds of additional all-time points and lift him up many places in the computerised all-time standings (both HW and p4p).
Anyways, "active" ratings of past and modern divisions differ way too much to be factored in all-time ratings, 50s were not the best HW era as it appears to be according to such ratings, but one of the weekest (maybe due to being post-war), therefore I'd suggest to remove this 14% of carreer top ranking from the formula at all.
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 26 Apr 2016, 17:48
by Leonid
If you want an alternative factor to reflect carreer-top achievement, maybe use smthn like 14% of boxer's best year's all-time points earned; or divide carreer top rating by top-10 average rating at that moment or for that year (though it would be a challenge to impement that formula technically).
In order to factor in strenth of a division simply a number of active fighters would suffice (eg. instead of 200/annual rank, use 10% of # of fighters in the division or cluster in certain year / annual rank).
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 01:55
by mike1989
New release is active now ...[/quote]
you can reset updated rating Holyfield and Wladimir Klitschko???
the best anual the rating of the opposition is assessed 1 best rival a year ?
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 02:40
by mike1989
Was Bryant Jennings in the top 20 at the time of his fight with Klitschko ) :
annual rating for 2014 No. 15 Deontay Wilder 191 point, Jennings 190 point
annual the Cruiserweight rating for 2014 + 4 fighter above Jennings
before the fight with Klitschko-Jennings in 2015: Christian Hammer 141 point; Odlanier Solis 135 points; Steve Cunningham 182 point; Tony Thompson 242 points, and -3 +1 ; Cruiserweight changes have occurred influencing the rating of Jennings, and a rating of Jennings top 18-20 at the time of his fight with Klitschko ??? )
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 05:07
by computerrank
mike1989 wrote:Was Bryant Jennings in the top 20 at the time of his fight with Klitschko ) :
annual rating for 2014 No. 15 Deontay Wilder 191 point, Jennings 190 point
annual the Cruiserweight rating for 2014 + 4 fighter above Jennings
before the fight with Klitschko-Jennings in 2015: Christian Hammer 141 point; Odlanier Solis 135 points; Steve Cunningham 182 point; Tony Thompson 242 points, and -3 +1 ; Cruiserweight changes have occurred influencing the rating of Jennings, and a rating of Jennings top 18-20 at the time of his fight with Klitschko ??? )
at time of bout - where is Jennings ???
Jenning's 190 was outside top 20 at time of his last bout - but now he should be in ... this widens the problem ...
Code: Select all
1 7035 Wladimir Klitschko 807
2 318081 Alexander Povetkin 388
3 280342 Marco Huck 382
4 479205 Tyson Fury 374
5 511850 Kubrat Pulev 347
6 496178 Vyacheslav Glazkov 327
7 324252 Yoan Pablo Hernandez 320
8 38558 Grigory Drozd 301
9 468841 Deontay Wilder 293
10 438266 Thabiso Mchunu 292
11 34020 Denis Lebedev 245
12 21633 Tony Thompson 242
13 425328 Tony Bellew 218
14 14043 Antonio Tarver 211
15 178679 Ovill McKenzie 189
16 36642 Steve Cunningham 183
17 508480 Rakhim Chakhkiev 180
18 355273 Carlos Takam 179
19 536325 William Fernando Souza Bezerra 177
20 489762 Andy Ruiz Jr 173
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 05:35
by computerrank
When I take the top 40, Jennings is in at #15 at time of the bout -
I will take in all above a minimum value ...
Code: Select all
1 7035 Wladimir Klitschko 807
2 318081 Alexander Povetkin 388
3 280342 Marco Huck 382
4 479205 Tyson Fury 374
5 511850 Kubrat Pulev 347
6 496178 Vyacheslav Glazkov 327
7 324252 Yoan Pablo Hernandez 320
8 38558 Grigory Drozd 301
9 468841 Deontay Wilder 293
10 438266 Thabiso Mchunu 292
11 34020 Denis Lebedev 245
12 21633 Tony Thompson 242
13 425328 Tony Bellew 218
14 14043 Antonio Tarver 211
15 529630 Bryant Jennings 190
16 178679 Ovill McKenzie 189
17 36642 Steve Cunningham 183
18 14587 Firat Arslan 182
19 508480 Rakhim Chakhkiev 180
20 355273 Carlos Takam 179
21 536325 William Fernando Souza Bezerra 177
22 17752 Krzysztof Wlodarczyk 175
23 324239 Nathan Cleverly 175
24 489762 Andy Ruiz Jr 173
25 579033 Dmitry Kudryashov 172
26 438253 Mike Perez 166
27 473857 Artur Szpilka 166
28 381739 Dereck Chisora 165
29 659772 Oleksandr Usyk 163
30 545749 Erkan Teper 161
31 324806 Bermane Stiverne 158
32 14883 Tomasz Adamek 152
33 489046 Lucas Browne 151
34 24358 Ruslan Chagaev 151
35 613846 Joseph Parker 143
36 475159 Christian Hammer 141
37 507154 Yunier Dorticos 141
38 352748 Victor Emilio Ramirez 138
39 530410 Youri Kayembre Kalenga 132
40 583767 Murat Gassiev 132
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 05:41
by mike1989
at time of bout - where is Jennings ???
Jenning's 190 was outside top 20 at time of his last bout - but now he should be in ... this widens the problem ...
Code: Select all
1 7035 Wladimir Klitschko 807
2 318081 Alexander Povetkin 388
3 280342 Marco Huck 382
4 479205 Tyson Fury 374
5 511850 Kubrat Pulev 347
6 496178 Vyacheslav Glazkov 327
7 324252 Yoan Pablo Hernandez 320
8 38558 Grigory Drozd 301
9 468841 Deontay Wilder 293
10 438266 Thabiso Mchunu 292
11 34020 Denis Lebedev 245
12 21633 Tony Thompson 242
13 425328 Tony Bellew 218
14 14043 Antonio Tarver 211
15 178679 Ovill McKenzie 189
16 36642 Steve Cunningham 183
17 508480 Rakhim Chakhkiev 180
18 355273 Carlos Takam 179
19 536325 William Fernando Souza Bezerra 177
20 489762 Andy Ruiz Jr 173
[/quote]
where coefficient decrease for cruisers? according to the table above in the top 20 fighters rated below 190 points at the time of his fight with Klitschko Jennings was 190 points ????
http://boxrec.com/media/index.php?title=Fight:1942392
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 05:44
by mike1989
[quote="computerrank"]When I take the top 40, Jennings is in at #15 at time of the bout -
I will take in all above a minimum value ...
I do not quite understand ??? ))))
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 05:54
by computerrank
mike1989 wrote:computerrank wrote:When I take the top 40, Jennings is in at #15 at time of the bout -
I will take in all above a minimum value ...
I do not quite understand ??? ))))
I will include all boxers with a post-bout rating above 100 independet of the length of the list.
In the current release the list is limited to the top 20, and the check is with the post-bout rating of a boxer at time of this bout.
When Jennings got his 190 points, he was outside the top 20.
At time of his Klitschko bout he would have be in with these 190 points ...
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 06:01
by mike1989
computerrank wrote:When I take the top 40, Jennings is in at #15 at time of the bout -
I will include all boxers with a post-bout rating above 100 independet of the length of the list.
In the current release the list is limited to the top 20, and the check is with the post-bout rating of a boxer at time of this bout.
When Jennings got his 190 points, he was outside the top 20.
At time of his Klitschko bout he would have be in with these 190 points ...
so Klitschko + points for Jennings opponent rank points accumulated ???
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 08:10
by computerrank
mike1989 wrote:...so Klitschko + points for Jennings opponent rank points accumulated ???
Yes, Jennings will be included ... and now looks like this - 5 points added for Jennings - but lost some points due to further corrections before ...
Code: Select all
Heavyweight 1999 176 30 5 0 25 7035 Wladimir Klitschko
Heavyweight 2000 405 108 38 13 57 7035 Wladimir Klitschko
Heavyweight 2001 431 145 71 13 60 7035 Wladimir Klitschko
Heavyweight 2002 467 191 104 21 65 7035 Wladimir Klitschko
Heavyweight 2003 303 199 112 21 65 7035 Wladimir Klitschko
Heavyweight 2005 313 231 127 39 65 7035 Wladimir Klitschko
Heavyweight 2006 543 374 193 105 76 7035 Wladimir Klitschko
Heavyweight 2007 612 462 259 112 90 7035 Wladimir Klitschko
Heavyweight 2008 720 549 325 123 101 7035 Wladimir Klitschko
Heavyweight 2009 872 702 391 189 122 7035 Wladimir Klitschko
Heavyweight 2010 793 788 457 197 133 7035 Wladimir Klitschko
Heavyweight 2011 855 887 523 230 133 7035 Wladimir Klitschko
Heavyweight 2012 690 925 556 235 133 7035 Wladimir Klitschko
Heavyweight 2013 720 1024 622 268 133 7035 Wladimir Klitschko
Heavyweight 2014 807 1156 688 334 133 7035 Wladimir Klitschko
Heavyweight 2015 590 1194 721 339 133 7035 Wladimir Klitschko
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 08:41
by mike1989
[quote="computerrank"]
Yes, Jennings will be included ... and now looks like this - 5 points added for Jennings - but lost some points due to further corrections before ...
and beyond that, Klitschko took the points ???
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 08:50
by computerrank
mike1989 wrote:computerrank wrote:
Yes, Jennings will be included ... and now looks like this - 5 points added for Jennings - but lost some points due to further corrections before ...
and beyond that, Klitschko took the points ???
These are values from the test system - on the official server you will see the changes after a new release will be activated.
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 10:48
by computerrank
Leonid wrote:If you want an alternative factor to reflect carreer-top achievement, maybe use smthn like 14% of boxer's best year's all-time points earned; or divide carreer top rating by top-10 average rating at that moment or for that year (though it would be a challenge to impement that formula technically).
In order to factor in strenth of a division simply a number of active fighters would suffice (eg. instead of 200/annual rank, use 10% of # of fighters in the division or cluster in certain year / annual rank).
Just to show, that dependencies are NOT as simple as expected - here a diagram from 1900 to 2015 (2 years time period each)
- maximum rating of a boxer in time period
- boxers winning in time period
- bouts in time period
diagram
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 15:23
by Leonid
computerrank wrote:Leonid wrote:If you want an alternative factor to reflect carreer-top achievement, maybe use smthn like 14% of boxer's best year's all-time points earned; or divide carreer top rating by top-10 average rating at that moment or for that year (though it would be a challenge to impement that formula technically).
In order to factor in strenth of a division simply a number of active fighters would suffice (eg. instead of 200/annual rank, use 10% of # of fighters in the division or cluster in certain year / annual rank).
Just to show, that dependencies are NOT as simple as expected - here a diagram from 1900 to 2015 (2 years time period each)
- maximum rating of a boxer in time period
- boxers winning in time period
- bouts in time period
diagram
So this means that maximum rating of a boxer in a time period does not correlate well with the number of boxers/bouts in time period, right? That's my point - it doesn't and IMO number of boxers is a better factor of a strenth of division.
But its not my main point, main point is that the strength of the division should not be factored in all-time ratings as heavily as it is now (+ 14% of carreer high rating). Here's a supporting diagram:

Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 15:29
by mike1989
and the rating Holyfield can lose ???
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 16:04
by computerrank
Leonid wrote: ... So this means that maximum rating of a boxer in a time period does not correlate well with the number of boxers/bouts in time period, right? That's my point - it doesn't and IMO number of boxers is a better factor of a strenth of division.
But its not my main point, main point is that the strength of the division should not be factored in all-time ratings as heavily as it is now (+ 14% of carreer high rating). ...
(1) The number of boxers in a time period is NOT a good measure for the top ratings in a time period.
(2) It looks like the top rating in a time period correlates with the number of boxers in the time periods before ... with some lag of 10 - 15 years. The model might be . if a lot of boxers start their career and peak their career 10 to 15 year later, the top rating will peak too ...
I will go into this - perhaps understanding this process will help ...
Re: Boxrec Ratings - Read first before commenting on the ratings
Posted: 27 Apr 2016, 16:19
by computerrank
mike1989 wrote:and the rating Holyfield can lose ???
Holyfield looses points - from 1312 down to 1304