梅威瑟在社交媒体上放出一张图，引来了地下一堆疑问

藏书人

一步 发表于 2019-8-13 20:34
所以请把它的详细规则搞来学习一下，否则真是云里雾里。到底打排名多少的能加分？

https://boxrec.com/media/index.php/BoxRec_Ratings_Description

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

• Points are redistributed by every bout. No points come in or get out of the system by this basic rating process
• But points get out of the system by career end, by point reductions due to inactivity or missing opponent quality
• So additional points must be fed into the system
• - 0.01 points, when a boxer wins a bout
• - 0.1 points, when a boxer defeats an opponent, who already won a bout within 18 months
• - 1 point, when a boxer defeats an opponent, who already won a bout against a winning opponent within 18 months
• - when defeating an opponent within the top 15 percent of all active boxers, who already defeated an opponent within the top 15 percent of all active boxers
• -- 8 points at least
• -- as much points as the defeated opponent had before the bout
• -- 40 points at most
• -- with weight = 1, when the opponent had no loss after his top win, with weight = 1/2 after 1 loss, with weight = 1/4 after 2 losses etc
• -- with weight = 1 within 18 months after the opponents top bout, with weight = 1/2 thereafter and decreasing by a factor of 1/2 per another 18 months
• - all with weight = cd * v; cd = clear decision factor and v = bout value
• Every boxer gets a first rating of 0 before his first bout.
• 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.
• The winner cannot lose points for KO, TKO, RTD, DQ, TD and decisions on points with cd=1
• 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, 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=1. If the score cards are available, it may be less.
• MD, SD 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 is limited to cd=0.5. If the score cards are available cd may be less.
• 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.
• 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.
• All bouts are regarded to have the same weight independent of titles.
• 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.
• The full relative point reward is 33%. It is in direct proportion to the pre-bout rating of the defeated opponent.
• The rating of a boxer is reduced, if he didn't box an opponent with a rating of at least 50% of his own rating points within 18 months.
• 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
• The reduction is in proportion to the time the requirement was missed.
• The rating of a boxer is reduced by 50% for every time period of inactivity of 18 months - and to even less in proportion to a longer time period of inactivity
• The pre-bout rating of a successfully debuting boxer is set to 25% of his opponents pre-bout rating.
• 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.
• The winner is always rated higher than the loser. the minimum margin is: mean pre-bout ratings of both r_m = (r_a + r_b)/2; r_new_winner = r_m + earn_f*v*cd/4; r_new_loser= r_m - earn_f*v*cd/4
  

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, clear decision factor cd, the new regular ratings r_a_new and r_b_new after a fight are:

• earn = 1/3 * v * (r_b*cd + (r_b-r_a)/(1+2*cd));
• r_a_new = r_a + earn_a
• r_b_new = r_b - earn_b
  

The winner gets additional points.

Rating reduction caused by missing opponent quality:

career_top_rating = highest career rating adapted to bout division days = days between bout with best opponent before and bout with best opponent after reduction

• r_red-career_top_rating/10 = (r_old-career_top_rating/10) * (1 - 0.5*(1 - 2*best_opp/r_old))**(days/(365.24*1.5))
• 
  

藏书人

Examples


Boxer a UD 6 boxer b, scores 59:55 58:56 58:56, a has 10 points, b has 5 points, opponent with a prior win, but not within the top 15 percent of all active boxers

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= 1/3 * 0.5 * (5*0.89 + (5-10)/(1+2*0.89)) = 0.63
r_a_new = 10 + 0.63 = 10.63
r_b_new = 5 - 0.63 = 4.37
Winner additionally gets 0.01 points + 0.1 points for opponent with win and weight = cd*v = 0.89*0.5= 0.445
additional points = 0.11*0.445 = 0.05 points
r_a_new = 10.63 + 0.05 = 10.68

Boxer a SD 8 boxer b, scores 77:75 77:75 75:77, a has 100 points, b has 50 points, opponent within the top 15 percent of all active boxers and with an own win against such a top 15 percent boxer 23 months ago and 1 following loss

A 8 rounder is rewarded with 8/12, v=0.667
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 0.667/4 at maximum
so cd=0.167
earn= 1/3 * 0.667 * (50*0.167 + (50-100)/(1+2*0.167)) = -6.48
r_a_new = 100 - 6.48 = 93.52
r_b_new = 50 + 6.48 = 56.48
Winner additionally gets 0.01 points + 0.1 points for opponent with win + 1 point for opponent with a win against a winner
+ 40 points for opponent with top 15 percent win with weight=1/2 for 1 following loss and weight=0.41 for top win before 22 months
and overall weight = cd*v = 0.5*0.67= 0.333
additional points = (1.11 + 40*0.5*0.41)*0.333 = 3.10 points
r_a_new = 93.52 + 3.10 = 96.62
All Time Ratings
The All Time Rating for a boxer is the sum of annual rank points of best defeated opponent at time of bout and the square root of his career top rating:

best opponent rank points = 200/ (best opponent rank - 1) for annual rating (if rank is 1 use rank 1)
best opponent p4p rank points = 200 / (best opponent p4p rank - 1) for annual rating (if rank is 1 use rank 1)
the ranks are interpolated in relation to the ratings of boxer ranked before him and the boxer behind him
the best opponent rank points are limited to the lowest rank points of the opponent, he lost to in this year - pair by pair
the value of 200 annual points is reduced, if the annual rating of #30 in the division is less than 76.3 for men, or less than 3.86 for women
the value of 200 annual p4p points is reduced, if the annual rating of #50 p4p is less than 279 for men, or less than 12.2 for women
Bout Star Ratings
All bouts are rated with 0 to 5 stars.

Men

5 stars = both opponents have 279 rating points at least ~ best 100 boxers
4 stars = both opponents have 122 rating points at least ~ best 300 boxers
3 stars = both opponents have 40.5 rating points at least ~ best 900 boxers
2 stars = both opponents have 5.92 rating points at least ~ best 2700 boxers
1 stars = both opponents have 0.428 rating points at least = best 8100 boxers
0 stars = one opponents has not even 0.428 rating points at least = not rated boxers
Women

5 stars = both opponents have 12.2 rating points at least ~ best 50 boxers
4 stars = both opponents have 6.15 rating points at least ~ best 100 boxers
3 stars = both opponents have 2.20 rating points at least ~ best 200 boxers
2 stars = both opponents have 0.554 rating points at least ~ best 400 boxers
1 stars = both opponents have 0.023 rating points at least = best 800 boxer
0 stars = one opponents has not even 0.023 rating points at least = not rated boxers

李涵辰

藏书人 发表于 2019-8-13 18:52
帕奎奥输了7场都历史第二，你咋评论？

没有人想理你，你没有那点特权啥也不是。
摆脱你今后别引用我的帖子，我被你害了两回了！
滚！！！！！！！！！！！！！！！！！！

藏书人

一步 发表于 2019-8-13 20:55
这应该是设计游戏的人设计的计算机制。太可怕了他们弄这么多参数是想反映什么？

能反应什么？跟足球、网球、国际象棋、围棋的积分排名一样，力争用数字化排序呗，反应拳手的强弱呗。当个参考数据罢了。

只不过其他项目单位时间的可选参数/参赛场次较多，比较容易数字化。拳手尤其顶尖拳手一年就1到3场左右，可选参数较少。

藏书人

梅威Sir 发表于 2019-8-13 18:51
严重怀疑当初卡尔扎河那么早退役，是刻意回避后来的沃德。当时已经46-0，只需再打3场就能平了马西亚诺的 ...

第一，当年的大卡是在接近37岁退役的。
第二，大卡始终有严重的手伤，大约在退役前四年就属于年年被医生强烈建议退役的。
第三，按当时大卡的状态想超马西亚诺还得4场、2年。作为老将未必能扛那么久。那时他已经在175打了2场了，回168有些痛苦，留在175面对那些大块头年轻人有些不值得（只有琼斯和霍普金斯值得他上来）。
第四，马西亚诺49战全胜后在1956年退役，娶了富家女但十年后空难去世。然后，这49战全胜退役就成了魔咒了，焦弗雷1965年47胜3平时被原田战爆冷击败；霍姆斯1985年48战全胜后特意挑了小两级上来的斯平克斯，结果还意外败北；洛佩兹1998年47战全胜后意外被对手逼平；1999年塔皮亚46胜2平被阿亚拉击败；2007年巨瓦46连胜后被查加耶夫爆冷击败；最新的是2017年3月冈萨雷斯46战全胜被斯里萨克特爆冷终结。

第五，大卡是2009年初在175磅级退役的，沃德当时是168的六强赛参赛者之一，168六强赛沃德首场是2009.11打的，2011.12月才击败弗洛齐成为六强赛冠军，那时大卡已经退役2年半了。沃德首次进入175磅级是2015.6月，那时大卡从175退役已经六年多了。

大卡退役主要还是老了，尤其手无法承受强对抗了。49战全胜退役虽然近在咫尺，但身体跟不上也只能认命了。跟沃德未来的崛起基本无关，而且，如果他能看出沃德未来的崛起，他肯定愿意把这后辈霸主掐死在襁褓中：）就像梅威瑟掐死阿瓦雷兹似的。未来阿瓦雷兹的每一次成功，都提醒大家，梅威瑟当年多可怕。

别用阿瓦雷兹不成熟来辩解，阿瓦雷兹当年是154双冠王、七连霸、当了三年拳王了、已经进P4P十强了。

梅威Sir

藏书人 发表于 2019-8-13 22:32
第一，当年的大卡是在接近37岁退役的。
第二，大卡始终有严重的手伤，大约在退役前四年就属于年年被医生 ...

没啥成熟不成熟。输就是输

藏书人

一步 发表于 2019-8-13 21:52
泰森和比帕奎奥弱那么多？这就是他们算出来的拳手强弱？俩人如果在黄金时期干一场会如何？罗伊琼斯和梅威 ...

需要再解释P4P的概念？

帕奎奥打不过任何一位重量级前100的拳手，但不妨碍他在P4P榜单上力压群雄。他面对本级对手表现出的强势，远比泰森面对本级对手时表现出的强势，所以按P4P（每磅体重的能力/相同体重下的能力），150磅的帕奎奥就是比150磅的泰森出色，215磅的帕奎奥就是比215磅的泰森出色。

泰森黄金时期不过是1986-1989年的十连冠、统一大三冠，打的最强的超级巨星级对手不过是38岁的霍姆斯和32岁的前175冠军、双膝有伤的斯平克斯。帕奎奥当年从122磅级干掉雷德瓦巴算起大约是冠军赛12胜2平、五级夺冠（按常规只算大级别）。期间对马奎兹2胜1平、对莫拉莱斯2胜1败、对巴雷拉2胜、外加干掉哈顿、库托这样的P4P十强级对手，2001-2011十年间只输给莫拉莱斯一场。

泰森巅峰期只干掉了一个P4P十强级对手斯平克斯，帕奎奥十年长盛不衰干掉至少五个P4P十强级对手8场，谁在本级别表现的更强？