RAZZ-MCFC Posted April 17, 2011 Share Posted April 17, 2011 Salido has jumped to number 1 after his win against Juanma! he's gone up 16 places just with that one win, such a stupid system, by rights Gamboa should now be moved up to number 1 Quote Link to comment Share on other sites More sharing options...
WelshDevilRob Posted April 17, 2011 Share Posted April 17, 2011 Yeah its a very flawed system - its like it takes no account of his last fight which was a clear loss to Gamboa. Quote Link to comment Share on other sites More sharing options...
iamasadlittleboy Posted April 17, 2011 Share Posted April 17, 2011 It's a points system though that doesn't take into account lots of things. When Campillo beat Shumenov, the Kazak moved up whilst Campillo moved down... Quote Link to comment Share on other sites More sharing options...
saigon Posted April 17, 2011 Share Posted April 17, 2011 That's ridiculous..lol Juan Ma was a good win but to jump that much. Quote Link to comment Share on other sites More sharing options...
RAZZ-MCFC Posted April 17, 2011 Author Share Posted April 17, 2011 if beating Juanma gives him that many points then that means they should now take into account Gamboa's win over Salido and give him extra points for that win stupid Quote Link to comment Share on other sites More sharing options...
grapevine241 Posted April 17, 2011 Share Posted April 17, 2011 boxrec's rankings are ridiculous. they seem to be popularity contests Quote Link to comment Share on other sites More sharing options...
iamasadlittleboy Posted April 17, 2011 Share Posted April 17, 2011 Lets also just quickly add that the division is a total mess anyway...John, Gamboa and Barros all hold a WBA title, Gonzalez and Salido have both just won their titles and the IBF title is vacant Quote Link to comment Share on other sites More sharing options...
davemurphy Posted April 17, 2011 Share Posted April 17, 2011 I know what they (BoxRec) use is flawed, but I will give them credit for being consistent in employing it (something the Orgs are notorious for not doing). A friend of mine John Gaetano and I used to marvel at some of things they came up with in All Time categories, so I think it's just a fault with whatever formula they use. Quote Link to comment Share on other sites More sharing options...
RAZZ-MCFC Posted April 17, 2011 Author Share Posted April 17, 2011 if anybody has a spare hour to work all this out, this is how their system works 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). The value of a result varies between v=1 and v=0. The clear decision factor varies between cd=1 and cd=0. KO, TKO, RTD are rewarded with full value v=1, cd=1. 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. 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. DRAW is rewarded with value v=0 and cd=0. MD, SD, DQ, TD are rewarded with half value v=0.5 or a lower value, if the number of rounds boxed is lower than 12 rounds, clear decision factor cd=0.5. This is valid, if the score cards are not available. If the score cards are available, the value rewarded is in relation to the mean score difference per judge. A mean score difference of 6 points or more per judge is rewarded with relative full value v=1. The maximum value is also in relation 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 mean score difference divided by a sixth of rounds boxed greater or equal 1. All bouts are regarded to have the same weight independent of titles. The winner gets a certain part of the opponent's points and additionally a certain part of the rating difference to the opponent's rating. The winner gets 10 additional points, if his opponent's rating is higher than a quarter of his own 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. The full relative point win is 34.5%. The part for reduction of ratings difference is between 11.5% for full value and 34.5 % for a draw. The rating of a boxer is reduced by 25%, if he didn't box an opponent with a rating of at least 25% of his own rating points within 18 months. The rating of a boxer is reduced by an increasing value of 0% to 50% for every time period of inactivity of 12 to 18 months. A boxer is regarded to have an home advantage, if he has already fought a minimum of two bouts in the country, where the current bout is taking place. The rating of the a boxer with home advantage is assumed to be at 140% for the calculation of the point wins, his opponent's rating is assumed to be at 70% for the calculation of the point wins. 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. The ratings are equalized between divisions in relation to average points of the boxers ranked #9, #10 and #11 in a division. If a boxer with a rating of r_a before the fight defeats boxer b with a rating of r_b before the fight with result of value v and clear decision factor cl the new ratings r_a_new and r_b_new after a fight are: r_a_new = r_a + 0.345*v*r_b + 0.345/(1+2*cl)*(r_b - r_a) r_b_new = r_b - 0.345*v*r_b - 0.345/(1+2*cl)*(r_b - r_a) Right, heres some examples..... Boxer a KO's boxer b, a has 1000 points, b has 500 points. v=1, cl=1. r_a_new = 1000 + 0.345*1*500 + 0.345/(1+2*1)*(500 - 1000) + 10 = 1125 r_b_new = 500 - 115 = 385 Boxer a KO boxer b, a has 1000 points, b has 500 points. v=1, cl=1. Boxer b has the home advantage. For the calculation the rating of boxer b is assumed to be 500*1.4 = 700 For the calculation the rating of boxer a is assumed to be 1000*0.7 = 700 r_a_new = 1000 + 0.345*1*700 + 0.345/(1+2*1)*(700 - 700) + 10 = 1252 r_b_new = 500 - 242 = 258 If it were a 6 round UD it would look like this.... Boxer a UD 6 boxer b, scores 59:55 58:56 58:56, a has 1000 points, b has 500 points. UD is rewarded with v=1 at maximum A 6 rounder is rewarded with value 6/12 at maximum v=0.5 mean score difference per judge is (4+2+2)/3 = 2.667, which is rewarded with value 2.667/6 at maximum = 0.445 so v=0.445 close decision factor is in relation to rounds boxed 12/6, so cl=0.89 r_a_new = 1000 + 0.345*0.445*500 + 0.345/(1+2*0.89)*(500 - 1000) +10 = 1025 r_b_new = 500+15= 485 Boxer a SD 4 boxer b, scores 39:37 39:37 37:39, a has 1000 points, b has 500 points SD is rewarded with v=0.5 at maximum A 4 rounder SD is rewarded with 0.5/12*4 at maximum v=0.167 mean score difference per judge is (2+2-2)/3 = 0.667, which is rewarded with 0.667/6 at maximum v=0.111 close decision factor is in relation to rounds boxed 12/4, so cl=0.333 r_a_new = 1000 + 0.345*0.111*500 + 0.345/(1+2*0.333)*(500 - 1000) +10 = 926 r_b_new = 500+66 = 566 Quote Link to comment Share on other sites More sharing options...
iamasadlittleboy Posted April 17, 2011 Share Posted April 17, 2011 Simply put, KO a guy ranked higher than you and you eat a lot of his points and you're point climb up big time, a close UD over a lower ranked fighter doesn't boost you're score by much. Hence Gamboa's victory over Salido was worth a lot fewer points than a KO win over Lopez. ... Quote Link to comment Share on other sites More sharing options...
brooklynbrawler Posted April 17, 2011 Share Posted April 17, 2011 Let's be honest here, who has Gamboa really beaten? There's no marquee names on his record. Solis is decent, and there are a couple of others on there worth a mention, but no real standouts. Lopez was the guy beating most of the bigger names in the division, and the man who beat the man always ends up getting a lot more credit than a single fight would be worth in most people's eyes. There are 3 points between them now on Boxrec's rankings, which means that one win now puts them pretty much neck and neck. KO'ing Lopez eclipses ANYTHING Gamboa has done in his career to date. There are always a few things which you can't get right using a formula, but I wouldn't say they're far off the mark in this case. Quote Link to comment Share on other sites More sharing options...
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