Ratings - please read before commenting - Archived

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Bobbyptsd
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Bobbyptsd »

megastargraphix wrote:Why Devon Alexander ranked higher than Manny Pacquiao in BoxRec Pound for Pound Ratings? I think Manny Pacquiao is a lot better than Devon Alexander.
Brilliant.

I've been away for a few days and you, good Sir, have made me smile. You've wrapped up everything I love about Boxrec into one sentence, thank you.
Cap
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Cap »

Just curious as to why the sudden change in the cruiserwt rankings dropping Hernandez and raising Huck and Jones. Also, considering his poor performance against a virtual unknown, why is Chambers ranked so high?

Cap
JCS
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by JCS »

Cap wrote:Just curious as to why the sudden change in the cruiserwt rankings dropping Hernandez and raising Huck and Jones. Also, considering his poor performance against a virtual unknown, why is Chambers ranked so high?

Cap
Hernandez went 18 months without beating a "quality opponent" and has been docked points because of it.

Chambers took his Heavyweight points down to Cruiserweight..

Although on Hernandez, I've got to say.. the drop doesn't appear to be warranted... I wonder if the quality opposition penalty should consider the current rating of the past opponent rather than the past rating of the past opponent. If this is/was the case, I don't think he would've dropped.
Cap
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Cap »

JCS wrote:
Cap wrote:Just curious as to why the sudden change in the cruiserwt rankings dropping Hernandez and raising Huck and Jones. Also, considering his poor performance against a virtual unknown, why is Chambers ranked so high?

Cap
Hernandez went 18 months without beating a "quality opponent" and has been docked points because of it.

Chambers took his Heavyweight points down to Cruiserweight..

Although on Hernandez, I've got to say.. the drop doesn't appear to be warranted... I wonder if the quality opposition penalty should consider the current rating of the past opponent rather than the past rating of the past opponent. If this is/was the case, I don't think he would've dropped.
Troy Ross wasn't a "quality opponent"?

Cap
Asterix
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Asterix »

Cap wrote:Troy Ross wasn't a "quality opponent"?

Cap
In reality, he definitely was, but in figures, he wasn't. His inactivity and poor recent opposition meant his rating was low when Hernandez fought him.
chucktaylor
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by chucktaylor »

JCS wrote:
Cap wrote:Just curious as to why the sudden change in the cruiserwt rankings dropping Hernandez and raising Huck and Jones. Also, considering his poor performance against a virtual unknown, why is Chambers ranked so high?

Cap
Hernandez went 18 months without beating a "quality opponent" and has been docked points because of it.

Chambers took his Heavyweight points down to Cruiserweight..

Although on Hernandez, I've got to say.. the drop doesn't appear to be warranted... I wonder if the quality opposition penalty should consider the current rating of the past opponent rather than the past rating of the past opponent. If this is/was the case, I don't think he would've dropped.
Why did his ranking just recently change because of this? His first first fight with Cunningham was well over 18 months ago (about 20) and the second was well inside of 18 months ago (about 16)... so his opponents in the last 18 months have been Cunningham and Ross as was the case last week when he was ranked #1.
JCS
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by JCS »

chucktaylor wrote:
JCS wrote:
Cap wrote:Just curious as to why the sudden change in the cruiserwt rankings dropping Hernandez and raising Huck and Jones. Also, considering his poor performance against a virtual unknown, why is Chambers ranked so high?

Cap
Hernandez went 18 months without beating a "quality opponent" and has been docked points because of it.

Chambers took his Heavyweight points down to Cruiserweight..

Although on Hernandez, I've got to say.. the drop doesn't appear to be warranted... I wonder if the quality opposition penalty should consider the current rating of the past opponent rather than the past rating of the past opponent. If this is/was the case, I don't think he would've dropped.
Why did his ranking just recently change because of this? His first first fight with Cunningham was well over 18 months ago (about 20) and the second was well inside of 18 months ago (about 16)... so his opponents in the last 18 months have been Cunningham and Ross as was the case last week when he was ranked #1.

Cunningham II was about 18 months ago... almost to the day, right?
chucktaylor
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by chucktaylor »

JCS wrote:
chucktaylor wrote:
JCS wrote: Hernandez went 18 months without beating a "quality opponent" and has been docked points because of it.

Chambers took his Heavyweight points down to Cruiserweight..

Although on Hernandez, I've got to say.. the drop doesn't appear to be warranted... I wonder if the quality opposition penalty should consider the current rating of the past opponent rather than the past rating of the past opponent. If this is/was the case, I don't think he would've dropped.
Why did his ranking just recently change because of this? His first first fight with Cunningham was well over 18 months ago (about 20) and the second was well inside of 18 months ago (about 16)... so his opponents in the last 18 months have been Cunningham and Ross as was the case last week when he was ranked #1.

Cunningham II was about 18 months ago... almost to the day, right?
You're right about that, my mistake.
Freedom2013
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Freedom2013 »

I've always liked the BoxRec ratings, they are more objective and scientific than peoples' personal opinions and the ABC rankings.

But it seems illogical to me that Vitali is ranked higher than Wladimir. :confused:
Asterix
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Asterix »

Freedom2013 wrote:I've always liked the BoxRec ratings, they are more objective and scientific than peoples' personal opinions and the ABC rankings.

But it seems illogical to me that Vitali is ranked higher than Wladimir. :confused:
Wlad's opposition has been really poor since Haye. If he beats Povetkin he'll be at the top again.
JCS
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by JCS »

MontyCircus wrote:...and now, a week after those posts...Wlad has 300 points more than Vitali? What the deuce!?
Quality opposition penalty.
JCS
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by JCS »

Martin,

Can we get an "upset of the year".. maybe a top 3?

There are of course two ways to do this... one is by proportional difference (X/Y) and one by net points difference (X-Y).

Furthermore, I'd like to see if it changed if a minimum rating for the loser is put into place... just to weed out the really obscure stuff.
computerrank
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by computerrank »

JCS wrote:Martin,

Can we get an "upset of the year".. maybe a top 3?

There are of course two ways to do this... one is by proportional difference (X/Y) and one by net points difference (X-Y).

Furthermore, I'd like to see if it changed if a minimum rating for the loser is put into place... just to weed out the really obscure stuff.

Code: Select all

+------------+------------+------------------+------------+---------------+----------+----------+----------+
| date       | boxer_a_id | last_name        | boxer_b_id | last_name     | r_a_0    | r_b_0    | r_diff   |
+------------+------------+------------------+------------+---------------+----------+----------+----------+
| 2013-02-23 |      31800 | Bundrage         |      43999 | Smith         | 701.6832 | 154.9163 | 546.7669 |
| 2013-08-24 |     287904 | Mares            |      38070 | Gonzalez      | 716.1921 | 314.5691 | 401.6230 |
| 2013-08-17 |     272538 | Geale            |     267609 | Barker        | 715.1554 | 331.8803 | 383.2751 |
| 2013-04-13 |      48243 | Donaire          |     492989 | Rigondeaux    | 808.1693 | 429.6315 | 378.5378 |
| 2013-05-03 |     285564 | Sato             |     528191 | Sor Rungvisai | 429.8551 |  65.3026 | 364.5525 |
| 2013-03-01 |     265500 | Dib              |     531920 | Gradovich     | 445.5967 | 122.2730 | 323.3237 |
| 2013-05-17 |      34020 | Lebedev          |       7532 | Jones         | 464.0731 | 145.8585 | 318.2146 |
| 2013-04-06 |      43525 | Viloria          |     467843 | Estrada       | 448.1472 | 136.0889 | 312.0583 |
| 2013-01-19 |      43998 | Salido           |     364679 | Garcia        | 720.2824 | 413.2191 | 307.0633 |
computerrank
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by computerrank »

MontyCircus wrote:And, I wonder, according to the BoxRec ratings, how many times in boxing history have the #1 and #2 P4P boxers fought each other?

Just for perspective on how historic the Pacquiao-Mayweather fight would have been...
This needs a special run - will look ...
marcianofan
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by marcianofan »

Hi Computerrank:
Could I get a list of the top 25 contenders at 140 as of May 14, 2012, please?
marcianofan
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by marcianofan »

marcianofan wrote:Hi Computerrank:
Could I get a list of the top 25 contenders at 140 as of May 14, 2012, please?
And if it's not too much trouble to do all at once, could I make the same request regarding the following dates, as well?

October 10, 2011
March 19, 2012
October 8, 2012
March 25, 2013
April 22, 2013

If it's easier, for the dates that are close together like March and April '13 and March and May '12, the top 25 as of the older date, and a list of new additions to the later one would suffice for my purposes.
Thanks very much!
Romulus9
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Romulus9 »

Just a simple question.

What is the time frame for a "recent win" in the calculation?

A year? Two years? Etc.?
computerrank
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by computerrank »

Romulus9 wrote:Just a simple question.

What is the time frame for a "recent win" in the calculation?

A year? Two years? Etc.?
Recent wins regarding the launch state may no be interrupted by draws or losses against opponents with lower launch state - otherwise the launch state will be reduced. There is no time limit.
ikorolev
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by ikorolev »

The fact that there is an explanation and that the ratings are calculated by computer doesn't make it right. Software which does calculations was written by people and has obvious drawbacks. Chavez Jr who haven't ever fought a light heavyweight shows as #6 in that weight category above Jean Pascal. This is ridiculous. Fights in lower weight categories should not be counted the same way as fights in a current category.
John
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by John »

ikorolev wrote:The fact that there is an explanation and that the ratings are calculated by computer doesn't make it right. Software which does calculations was written by people and has obvious drawbacks. Chavez Jr who haven't ever fought a light heavyweight shows as #6 in that weight category above Jean Pascal. This is ridiculous. Fights in lower weight categories should not be counted the same way as fights in a current category.
If you think you can improve the accuracy of the algorithm please let us know :TU:
SaadOffTheDeck
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by SaadOffTheDeck »

John wrote:
ikorolev wrote:The fact that there is an explanation and that the ratings are calculated by computer doesn't make it right. Software which does calculations was written by people and has obvious drawbacks. Chavez Jr who haven't ever fought a light heavyweight shows as #6 in that weight category above Jean Pascal. This is ridiculous. Fights in lower weight categories should not be counted the same way as fights in a current category.
If you think you can improve the accuracy of the algorithm please let us know :TU:
Unlikely if his calculations are going to include 173lbs not being Light heavyweight.
Bobbyptsd
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Bobbyptsd »

ikorolev wrote:The fact that there is an explanation and that the ratings are calculated by computer doesn't make it right. Software which does calculations was written by people and has obvious drawbacks. Chavez Jr who haven't ever fought a light heavyweight shows as #6 in that weight category above Jean Pascal. This is ridiculous. Fights in lower weight categories should not be counted the same way as fights in a current category.
Chavez and Vera fought at light heavy 3 days ago, so there's that.
ikorolev
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by ikorolev »

If a system produces crappy results like Chavez Jr being above Dawson and Pascal, then instead of finding explanations, it would be better to find solutions.
Asterix
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by Asterix »

ikorolev wrote:If a system produces crappy results like Chavez Jr being above Dawson and Pascal, then instead of finding explanations, it would be better to find solutions.
It is better to offer a solution than to criticise the current system.
ikorolev
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Re: Boxrec Ratings - Read first before commenting on the ratings

Post by ikorolev »

One of possible solutions is to use only a certain percentage of points earned in lower weight categories when calculating rating in a higher category.
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