Difference between revisions of "BoxRec Ratings Description"

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== Introduction ==
 
== Introduction ==
'''Boxing Record Archive''' ([[BoxRec.com]]) provides "Active" and "All" boxer ratings, as calculated daily by its computer, to entertain its visitors. They have no official value beyond this Web site. The "All" ratings include both "inactive" (retired) and "Active" boxers. The "Active" ratings include only those boxers who have had a bout within the past 365 days. (After a year of not fighting, a boxer is automatically designated "inactive" by the BoxRec computer. A boxer is also designated "inactive," or "complete," if he has announced his retirement, even if he may have had a bout within the past 365 days.) Every boxer in the database is rated--even those with an 0-1 record.  
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'''BoxRec.com''' provides ''Current'' and ''All Time'' boxer ratings, as calculated daily by its computer. These ratings are not influenced by subjective views or opinions but are wholly dependent upon the bouts contained in the BoxRec database.
  
These ratings are not influenced by subjective views or opinions, but are wholly dependent upon the bouts contained in the BoxRec server database. The BoxRec computer re-calculates the ratings daily at approximately 9:35 GMT. As the computer refreshes its calculations each and every day, a boxer may earn or lose ratings points with every bout he has fought since the last calculation--provided, of course, that a BoxRec Editor has entered that bout into the database before the recalculation. A boxer may also earn or lose points if bouts are added to any of his opponents' records, or to their opponents' records--even if the boxer himself has not had a fight since the last BoxRec computer calculation.  
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The ''All Time'' (or "All Boxers") ratings include both "Inactive" (retired) and "Active" boxers. The ''Current'' ratings include only those boxers who have fought a bout within the past 365 days ("Active"). (After a year of not fighting, a boxer is automatically designated "Inactive" by the BoxRec computer. A boxer is also designated "Inactive" if he has announced his retirement, even if he may have had a bout within the past 365 days.) Every boxer in the database is rated--even those with an 0-1 record.  
  
There admittedly are inaccuracies and anomalies, especially in the All-Time ratings, because of incomplete records in the BoxRec database. Although a boxer’s own record may be complete, his opponents’ records may not be complete. Pre-World War II boxers in particular are at somewhat of a disadvantage, vis-à-vis modern boxers. Their opponents’ records often are quite incomplete--because of the scarcity of source material or Editors' time--while the records of opponents of more current boxers often are quite complete. So, for example, while the records of Mike Tyson’s opponents may be quite complete--thereby earning Tyson a certain number of points and giving him a high ranking among the All-Time Heavyweights--the records of Young Stribling’s opponents may be extremely lacking, thereby giving Stribling fewer points and a much-lower All-Time rating. And it may appear to the casual BoxRec visitor that Stribling had fought many boxers making their professional debuts or having had only a handful of career bouts, when the truth is that not all of his opponents’ total career bouts have been entered yet into the database by an Editor. (Too many of those old-time bouts are forever lost in history because they were not reported by a newspaper or similar source, or the source was later destroyed.) But as the BoxRec Editors continue to research older resources and enter “new” historical bouts into the database, the rating of an old-time boxer like Stribling will gradually move up or down, even if his own record is complete--if bouts are added to his opponents’ records, or to his opponents' opponents' records, and so forth. So the BoxRec ratings are continually improving as new bouts are entered into the database. (Presently, some 2,000 current and old-time bouts are entered each week by the BoxRec Editors.)
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The BoxRec computer re-calculates the ratings daily at approximately 9:35 GMT. As the computer refreshes its calculations each and every day, a boxer may gain or lose ratings points with every bout of his entered into the database by a BoxRec Editor since the last daily calculation. A boxer may also gain or lose points if bouts are added to any of his opponents' records, or to their opponents' records--even if the boxer himself has not had a fight since the last BoxRec computer calculation.  
  
Further, because of the very few women presently boxing professionally, with some weight divisions having only a handful of active female boxers, a woman with an 0-1 record will appear “world ranked” by BoxRec. This is simply an anomaly due to the few female entries in the database.
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There admittedly are inaccuracies and anomalies, especially in the ''All Time'' ratings, mostly because of incomplete records in the BoxRec database. Although a boxer’s own record may be complete, his opponents’ records may not be complete. Pre-World War II boxers in particular are at somewhat of a disadvantage, vis-à-vis modern boxers. Their opponents’ records often are quite incomplete--because of the scarcity of source material or Editors' time--while the records of opponents of more current boxers may be quite complete. So, for example, while Mike Tyson's own record, and those of his opponents, may be complete--thereby earning Tyson a certain number of points and thus giving him a high ranking among the ''All Time'' Heavyweights--the records of Young Stribling’s opponents may be extremely lacking, thereby giving Stribling fewer points and a much-lower ''All Time'' rating. And it may appear to the casual BoxRec visitor that Stribling had fought many boxers making their professional debuts or having had only a handful of career bouts, when the truth is that not all of his opponents’ total career bouts have been entered into the database. (Too many of those old-time bouts are forever lost in history because they were not reported by a newspaper or similar source, or the source was later destroyed.) However, as BoxRec Editors continue to research older resources and enter “new” historical bouts into the database, or correct bouts/boxers previously entered, the rating of an old-time boxer like Stribling may gradually move up or down, even if his own record is considered complete, if bouts are added to his opponents’ records, or to their opponents' records, and so on.
  
== Ratings structure ==
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Finally, because of the very few women presently boxing professionally, with some weight divisions having only a handful of active female boxers, a woman with an 0-1 record will appear “world ranked” by BoxRec. This is simply an anomaly due to the few female entries in the database.
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== Ratings Structure ==
  
 
All these ratings evaluate every day all bouts in the database in chronological sequence. A higher rated boxer should be expected to defeat a lower rated boxer with increasing probability by increasing rating difference.  
 
All these ratings evaluate every day all bouts in the database in chronological sequence. A higher rated boxer should be expected to defeat a lower rated boxer with increasing probability by increasing rating difference.  
  
=== Current ("Active") rating ===
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=== Current Ratings ===
  
 
#Every boxer gets a first rating of 0 before his first bout.  
 
#Every boxer gets a first rating of 0 before his first bout.  
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#The winner gets a certain part of the opponent's points and a certain part of the rating difference to the opponent's rating.  
 
#The winner gets a certain part of the opponent's points and a certain part of the rating difference to the opponent's rating.  
 
#For a DRAW the rating of the higher rated boxer is reduced by some part of the point difference; the rating of the lower rated boxer is enhanced by the same amount of points.
 
#For a DRAW the rating of the higher rated boxer is reduced by some part of the point difference; the rating of the lower rated boxer is enhanced by the same amount of points.
# The full relative point reward is 33%. It is in direct proportion to the pre-bout rating of the defeated opponent.
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#The full relative point reward is 33%. It is in direct proportion to the pre-bout rating of the defeated opponent.
#The winner can get up to 25 additional points per opponent's launch state rank
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#The winner also gets additional points from the bout's additional points value in proportion of the opponent's rating to his own rating
#The maximum launch state rank regarded is 15 - and so the maximum number of additional points is 375
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#The bout's additional points value comprehends 3 parts
#This value is reduced by the own rating, and it is set in direct proportion to the rounds boxed and the clearness of the decision
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#1 point anyway - another 4 points for an opponent connected by strong results to other connected boxers - and another up to 258 points for an opponent in the division top 50 for men and the division top 30 for women
#This value is multipied by the maximum of 6 * the opponent's launch state+1 and the minimum of the opponent's rating and 25 * the opponent's launch state
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#The rating of a boxer is reduced, if he didn't box an opponent with a rating of at least 50% (for men) or 33% (for women) of his own rating points within 18 months.
#This value is divided by 25 * the opponent's launch state
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#The rating of a boxer is reduced by up to 50% in proportion to the difference of 2 times the rating points of his best opponent in this time period minus his own rating for men.
#This value is multiplied by the quotient of the maximum of the opponent rating and 18 on one side and the sum of the maxima of the opponent rating and 18 and the maxima of the own rating and 18
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#The rating of a boxer is reduced by up to 50% in proportion to the difference of 3 times the rating points of his best opponent in this time period minus his own rating for women.
#Launch states are:
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#The reduction is in proportion to the time the requirement was missed.  
##0 = no recent win
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##1 = 1 recent win, 2 = 2 recent wins, 3 = 3 recent wins
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##4 = recent win over opponent with state 3, 5 = 2 recent wins over opponent with state 3, 6 = 3 recent wins over opponent with state 3
+
##7 = recent win over opponent with state 6, 8 = 2 recent wins over opponent with state 6, 9 = 3 recent wins over opponent with state 6
+
##10 = recent win over opponent with state 9, 11 = 2 recent wins over opponent with state 9, 12 = 3 recent wins over opponent with state 9
+
##13 = recent win over opponent with state 12, 14 = 2 recent wins over opponent with state 12, 15 = 3 recent wins over opponent with state 12
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#The ratings are decreased for moving up to higher weight divisions by the square of the reciprocal ratio of the weights limits of the divisions--and they are increased by the same factor for moving down the divisions.
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#The rating of a boxer is reduced by 0% to 50%, if he didn't box an opponent with a rating of at least 50% to 0% of his own rating points within 18 months.  
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#The rating of a boxer is reduced by 50% for every time period of inactivity of 18 months.
 
#The rating of a boxer is reduced by 50% for every time period of inactivity of 18 months.
#The pre-bout rating of a boxer successfully returning from inactivity is set to the lower value of his own rating before inactivity and the higher value of his own rating after inactivity and the pre-bout rating of his opponent.
 
 
#The pre-bout rating of a successfully debuting boxer is set to 25% of his opponents pre-bout rating.
 
#The pre-bout rating of a successfully debuting boxer is set to 25% of his opponents pre-bout rating.
 
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#The rating points are in relation to a weight division. The rating points are converted with the cube of the upper weight limit ratio of the old and new weight division.
  
 
'''Formula'''  
 
'''Formula'''  
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*r_b_new = r_b - earn
 
*r_b_new = r_b - earn
  
Additional points (no additional loss points accounted):
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Additional points:
 +
 
 +
*opponent is connected or not: con=(1 or 0), value of result v, clearness of decision cd, winner's rating r_a, opponents rating r_b, opponent's rank in division rank (#1 is equivalent to #2):
 +
 
 +
additional points winner = (1 + 4*con + 258/(rank-1)) * v * cd * (r_b+10)/(r_a+r_b+20)
  
*opponent in launch state n: v * cd * (25*n - r_a) * max(6*(n+1),min(r_b,25*n)) / (25*n) * max(r_a,18) / (max(r_a,18) + max(r_b,18))
 
  
 
Rating reduction caused by missing opponent quality:
 
Rating reduction caused by missing opponent quality:
  
*r_new = r_old * (1 - 0.5*(1 - best_opp/r_old/0.5))
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*r_red-10 = (r_old-10) * (1 - 0.5*(1 - 2*best_opp/r_old)) for men
 +
*r_red-10 = (r_old-10) * (1 - 0.5*(1 - 3**best_opp/r_old)) for women
  
  
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''More complex - Boxer a KO 4 boxer b, a has 30 points, b has 40 points, boxer b is in launch state 3, v=1, cd=1''
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''More complex - Boxer a KO 4 boxer b, a has 300 points, b has 400 points, boxer b is connected con=1, v=1, cd=1, opponent's rank in division rank=5''
  
*earn= 0.33 * 1 * (40*1 + (40-30)/(1+2*1)) = 14
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*earn= 0.33 * 1 * (400*1 + (400-300)/(1+2*1)) = 143
*r_a_new = 30 + 14 = 44
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*r_a_new = 300 + 143 = 443
*r_b_new = 40 - 19 = 21
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*r_b_new = 400 - 143 = 257
  
 
*additional points:
 
*additional points:
  
*1 * 1 * (3*25 - 30) * max(6*4,min(40,3*25)) / 75 * 30 / (30+40)= 1 * 45 * 40 / 75 * 3 / 7 = 10
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*additional points winner = (1 +4*1 + 258/(5-1)) * 1 * 1 * (400+10)/(400+300+20) = 40
*r_a_new = 44 + 10 = 54
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*r_a_new = 444 + 40 = 484
 +
*r_a_new = 257 + 0 = 257
  
=== All Time ("Inactive") Ratings ===
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=== All Time Ratings ===
  
The All Time Rating for a boxer is the sum of 33% of the sum of annual rank points he gets for his annual ratings - and 33% of the sum of annual rank points of best defeated opponents - and 14% of his career top rating:
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The All Time Rating for a boxer is the sum of the sum of annual rank points he gets for his annual ratings - and the sum of annual rank points of best defeated opponents at time of bout  - and the square root of his career top rating:
 
#the annual rating is the rating at the end of every year the boxer was active
 
#the annual rating is the rating at the end of every year the boxer was active
#annual rank points = 200 / annual rank in division cluster
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#rank points = 100 / annual rank in division for annual rating
#the value of 200 annual points for the top boxer is reduced, if the annual rating of #10 in the division cluster is less than 100 for men, -  and if the annual rating of #5 in the division cluster is less than 50 for women
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#best opponent rank points = 100 / (best opponent rank - 1) for annual rating (if rank is 1 use rank 1)
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#the value of 100 annual points for the top boxer is reduced, if the annual rating of #10 in the division is less than 67 for men, -  and if the annual rating of #5 in the division is less than 30 for women
  
 
=== Bout Star Ratings ===
 
=== Bout Star Ratings ===
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Men
 
Men
  
* 5 stars = both opponents have 331 ratings points at least ~ best 100 boxers
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* 5 stars = both opponents have 179 ratings points at least ~ best 100 boxers
* 4 stars = both opponents have 188 ratings points at least ~ best 300 boxers
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* 4 stars = both opponents have 93 ratings points at least ~ best 300 boxers
* 3 stars = both opponents have 83 ratings points at least ~ best 900 boxers
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* 3 stars = both opponents have 46 ratings points at least ~ best 900 boxers
* 2 stars = both opponents have 24 ratings points at least ~ best 2700 boxers
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* 2 stars = both opponents have 20 ratings points at least ~ best 2700 boxers
* 1 stars = both opponents have 1 rating point at least = rated boxers
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* 1 stars = both opponents have 5 rating point at least = best 8100 boxers
* 0 stars = one opponents has not even 1 rating point at least = not rated boxers
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* 0 stars = one opponents has not even 5 rating point at least = not rated boxers
  
 
Women
 
Women
  
* 5 stars = both opponents have 42 ratings points at least ~ best 30 boxers
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* 5 stars = both opponents have 75 ratings points at least ~ best 50 boxers
* 4 stars = both opponents have 28 ratings points at least ~ best 60 boxers
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* 4 stars = both opponents have 42 ratings points at least ~ best 100 boxers
* 3 stars = both opponents have 14 ratings points at least ~ best 120 boxers
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* 3 stars = both opponents have 18 ratings points at least ~ best 200 boxers
* 2 stars = both opponents have 4 ratings points at least ~ best 240 boxers
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* 2 stars = both opponents have 5 ratings points at least ~ best 400 boxers
* 1 stars = both opponents have 1 rating point at least = rated boxers
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* 1 stars = both opponents have 1 rating point at least = best 700 boxer
 
* 0 stars = one opponents has not even 1 rating point at least = not rated boxers
 
* 0 stars = one opponents has not even 1 rating point at least = not rated boxers
  
 
== Links ==
 
== Links ==
*[http://boxrec.com/forum/viewtopic.php?f=3&t=28051 BoxRec Forum] discussion of Ratings Formula
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*BoxRec Forum Discussion of Ratings Formula: [http://boxrec.com/forum/viewtopic.php?f=3&t=28051]
*[http://www.boxrec.com/ratings.php BoxRec's Ratings]: Current & All-Time
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*BoxRec's Ratings: [http://www.boxrec.com/ratings.php ]
 
*[[BoxRec.com|BoxRec History & Description]]  
 
*[[BoxRec.com|BoxRec History & Description]]  
*[[BoxRec's Annual Ratings|BoxRec's Annual Ratings Men]], [[BoxRec's Annual Ratings Women|BoxRec's Annual Ratings Women]]
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*[[BoxRec's Annual Ratings|BoxRec's Annual Ratings Men]], [[BoxRec's Annual Ratings Women|BoxRec's Annual Ratings Women]]
*[http://www.boxrec.com/ BoxRec Home Page]
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Latest revision as of 01:48, 12 March 2017

Introduction

BoxRec.com provides Current and All Time boxer ratings, as calculated daily by its computer. These ratings are not influenced by subjective views or opinions but are wholly dependent upon the bouts contained in the BoxRec database.

The All Time (or "All Boxers") ratings include both "Inactive" (retired) and "Active" boxers. The Current ratings include only those boxers who have fought a bout within the past 365 days ("Active"). (After a year of not fighting, a boxer is automatically designated "Inactive" by the BoxRec computer. A boxer is also designated "Inactive" if he has announced his retirement, even if he may have had a bout within the past 365 days.) Every boxer in the database is rated--even those with an 0-1 record.

The BoxRec computer re-calculates the ratings daily at approximately 9:35 GMT. As the computer refreshes its calculations each and every day, a boxer may gain or lose ratings points with every bout of his entered into the database by a BoxRec Editor since the last daily calculation. A boxer may also gain or lose points if bouts are added to any of his opponents' records, or to their opponents' records--even if the boxer himself has not had a fight since the last BoxRec computer calculation.

There admittedly are inaccuracies and anomalies, especially in the All Time ratings, mostly because of incomplete records in the BoxRec database. Although a boxer’s own record may be complete, his opponents’ records may not be complete. Pre-World War II boxers in particular are at somewhat of a disadvantage, vis-à-vis modern boxers. Their opponents’ records often are quite incomplete--because of the scarcity of source material or Editors' time--while the records of opponents of more current boxers may be quite complete. So, for example, while Mike Tyson's own record, and those of his opponents, may be complete--thereby earning Tyson a certain number of points and thus giving him a high ranking among the All Time Heavyweights--the records of Young Stribling’s opponents may be extremely lacking, thereby giving Stribling fewer points and a much-lower All Time rating. And it may appear to the casual BoxRec visitor that Stribling had fought many boxers making their professional debuts or having had only a handful of career bouts, when the truth is that not all of his opponents’ total career bouts have been entered into the database. (Too many of those old-time bouts are forever lost in history because they were not reported by a newspaper or similar source, or the source was later destroyed.) However, as BoxRec Editors continue to research older resources and enter “new” historical bouts into the database, or correct bouts/boxers previously entered, the rating of an old-time boxer like Stribling may gradually move up or down, even if his own record is considered complete, if bouts are added to his opponents’ records, or to their opponents' records, and so on.

Finally, because of the very few women presently boxing professionally, with some weight divisions having only a handful of active female boxers, a woman with an 0-1 record will appear “world ranked” by BoxRec. This is simply an anomaly due to the few female entries in the database.

Ratings Structure

All these ratings evaluate every day all bouts in the database in chronological sequence. A higher rated boxer should be expected to defeat a lower rated boxer with increasing probability by increasing rating difference.

Current Ratings

  1. Every boxer gets a first rating of 0 before his first bout.
  2. After every bout, the ratings of the two boxers involved are changed depending on the bout's official result (KO, TKO, RTD, UD, PTS, NWS, MD, SD, DQ, TD, DRAW).
  3. The value of a result varies between v=1 and v=0.
  4. The clear decision factor varies between cd=1 and cd=0.
  5. The winner cannot lose points for KO, TKO, RTD, DQ, TD and decisions on points with cd=1
  6. KO, TKO, RTD are rewarded with full value v=1, cd=1.
  7. NWS is rewarded with full value v=1 for 12 rounds boxed and more and a lower value related to the number of rounds boxed. Clear decision factor cd=1.
  8. UD, PTS are rewarded with full value v=1 for 12 rounds boxed and more and a lower value related to the number of rounds boxed, clear decision factor cd=1. This is valid, if the score cards are not available.
  9. DRAW is rewarded with full value v=1 for 12 rounds boxed and more and a lower value related to the number of rounds boxed. Clear decision factor cd=0.
  10. MD, SD, DQ, TD are rewarded with full value v=1 for 12 rounds boxed and more and a lower value related to the number of rounds boxed. Clear decision factor cd=0.5. This is valid, if the score cards are not available.
  11. If the score cards are available, the value rewarded is in direct proportion to the rounds boxed, with full value v=1 for 12 rounds boxed and more. The clear decision factor is in proportion to rounds boxed and the mean score difference per judge. cd=1 for a mean score difference per judge of 50% of the rounds boxed.
  12. All bouts are regarded to have the same weight independent of titles.
  13. The winner gets a certain part of the opponent's points and a certain part of the rating difference to the opponent's rating.
  14. For a DRAW the rating of the higher rated boxer is reduced by some part of the point difference; the rating of the lower rated boxer is enhanced by the same amount of points.
  15. The full relative point reward is 33%. It is in direct proportion to the pre-bout rating of the defeated opponent.
  16. The winner also gets additional points from the bout's additional points value in proportion of the opponent's rating to his own rating
  17. The bout's additional points value comprehends 3 parts
  18. 1 point anyway - another 4 points for an opponent connected by strong results to other connected boxers - and another up to 258 points for an opponent in the division top 50 for men and the division top 30 for women
  19. The rating of a boxer is reduced, if he didn't box an opponent with a rating of at least 50% (for men) or 33% (for women) of his own rating points within 18 months.
  20. The rating of a boxer is reduced by up to 50% in proportion to the difference of 2 times the rating points of his best opponent in this time period minus his own rating for men.
  21. The rating of a boxer is reduced by up to 50% in proportion to the difference of 3 times the rating points of his best opponent in this time period minus his own rating for women.
  22. The reduction is in proportion to the time the requirement was missed.
  23. The rating of a boxer is reduced by 50% for every time period of inactivity of 18 months.
  24. The pre-bout rating of a successfully debuting boxer is set to 25% of his opponents pre-bout rating.
  25. The rating points are in relation to a weight division. The rating points are converted with the cube of the upper weight limit ratio of the old and new weight division.

Formula

If a boxer with a rating of r_a before the fight defeats a boxer b with a rating of r_b before the fight with result of value v and clear decision factor cd, the new ratings r_a_new and r_b_new after a fight are, earn_f is 33.3%:

  • earn = earn_f * v * (r_b*cd + (r_b-r_a)/(1+2*cd));
  • r_a_new = r_a + earn
  • r_b_new = r_b - earn

Additional points:

  • opponent is connected or not: con=(1 or 0), value of result v, clearness of decision cd, winner's rating r_a, opponents rating r_b, opponent's rank in division rank (#1 is equivalent to #2):

additional points winner = (1 + 4*con + 258/(rank-1)) * v * cd * (r_b+10)/(r_a+r_b+20)


Rating reduction caused by missing opponent quality:

  • r_red-10 = (r_old-10) * (1 - 0.5*(1 - 2*best_opp/r_old)) for men
  • r_red-10 = (r_old-10) * (1 - 0.5*(1 - 3**best_opp/r_old)) for women


Examples

Boxer a KO boxer b, a has 1000 points, b has 500 points. launch state 4, v=1, cd=1,

  • earn= 0.33 * 1 * (500*1 + (500-1000)/(1+2*1)) = 111
  • r_a_new = 1000 + 111 = 1111
  • r_b_new = 500 - 111 = 389


Boxer a UD 6 boxer b, scores 59:55 58:56 58:56, a has 1000 points, b has 500 points.

  • A 6 rounder is rewarded with value 6/12, v=0.5
  • UD is rewarded with cd=1 at maximum
  • mean score difference per judge is (4+2+2)/3 = 2.667, which is rewarded in direct proportion to half the rounds boxed with cd= 2.667/3 = 0.89 at maximum
  • so cd=0.89
  • earn= 0.33 * 0.5 * (500*0.89 + (500-1000)/(1+2*0.89)) = 44
  • r_a_new = 1000 + 44 = 1044
  • r_b_new = 500 - 44 = 456


Boxer a SD 4 boxer b, scores 39:37 39:37 37:39, a has 1000 points, b has 500 points

  • A 4 rounder is rewarded with 4/12, v=0.333
  • SD is rewarded with cd=0.5 at maximum
  • mean score difference per judge is (2+2-2)/3 = 0.667, which is rewarded in direct proportion to half the rounds boxed 0.667/2 at maximum\
  • so cd=0.333
  • earn= 0.33 * 0.33 * (500*0.33 + (500-1000)/(1+2*0.33)) = -15
  • r_a_new = 1000 - 15 = 985
  • r_b_new = 500 + 15 = 515


More complex - Boxer a KO 4 boxer b, a has 300 points, b has 400 points, boxer b is connected con=1, v=1, cd=1, opponent's rank in division rank=5

  • earn= 0.33 * 1 * (400*1 + (400-300)/(1+2*1)) = 143
  • r_a_new = 300 + 143 = 443
  • r_b_new = 400 - 143 = 257
  • additional points:
  • additional points winner = (1 +4*1 + 258/(5-1)) * 1 * 1 * (400+10)/(400+300+20) = 40
  • r_a_new = 444 + 40 = 484
  • r_a_new = 257 + 0 = 257

All Time Ratings

The All Time Rating for a boxer is the sum of the sum of annual rank points he gets for his annual ratings - and the sum of annual rank points of best defeated opponents at time of bout - and the square root of his career top rating:

  1. the annual rating is the rating at the end of every year the boxer was active
  2. rank points = 100 / annual rank in division for annual rating
  3. best opponent rank points = 100 / (best opponent rank - 1) for annual rating (if rank is 1 use rank 1)
  4. the value of 100 annual points for the top boxer is reduced, if the annual rating of #10 in the division is less than 67 for men, - and if the annual rating of #5 in the division is less than 30 for women

Bout Star Ratings

All bouts are rated with 0 to 5 stars.

Men

  • 5 stars = both opponents have 179 ratings points at least ~ best 100 boxers
  • 4 stars = both opponents have 93 ratings points at least ~ best 300 boxers
  • 3 stars = both opponents have 46 ratings points at least ~ best 900 boxers
  • 2 stars = both opponents have 20 ratings points at least ~ best 2700 boxers
  • 1 stars = both opponents have 5 rating point at least = best 8100 boxers
  • 0 stars = one opponents has not even 5 rating point at least = not rated boxers

Women

  • 5 stars = both opponents have 75 ratings points at least ~ best 50 boxers
  • 4 stars = both opponents have 42 ratings points at least ~ best 100 boxers
  • 3 stars = both opponents have 18 ratings points at least ~ best 200 boxers
  • 2 stars = both opponents have 5 ratings points at least ~ best 400 boxers
  • 1 stars = both opponents have 1 rating point at least = best 700 boxer
  • 0 stars = one opponents has not even 1 rating point at least = not rated boxers

Links