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Calculating rating...

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tango View Drop Down
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    Posted: 12/30/2006 at 4:05pm
How does this rating system work?
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takaaki View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote takaaki Quote  Post ReplyReply Direct Link To This Post Posted: 12/30/2006 at 4:55pm
you're located in australia, right??  so what rating system are you talking about??
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tango Quote  Post ReplyReply Direct Link To This Post Posted: 01/01/2007 at 12:34am
I've seen in some post some people say their table tennis standard is like 1000 or 2000 etc..  What exactly is this a measure of?  How to measure?  And is it only applicable up in Cananda & America?
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takaaki View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote takaaki Quote  Post ReplyReply Direct Link To This Post Posted: 01/01/2007 at 3:34am

oh, so you're talking about our system over here...

well, yes, it's only for canada and the usa, though even between our 2 countries there is a slight difference. maybe somebody else could explain it better than i, but i'll take a shot...

anyway, 1000 would be just slightly better than a beginner and if you want to try out for the us national team, you have to be at least 2300. 

but that is very low, cuz most of the people you face internationally (at that level) start at around 2600.  also, the players here who would actually end up making the team start at 2600, so if you are 2300, you pretty much have no chance...  there is actually one 2300-player from the us who plays in the ittf pro tour and he has yet to win a match!!

most of the top players in the world have played here at least once (in the us open) and therefore have a us rating.  i think the highest-ranked player here is kong linghui, at 2911.  wang liqin, who's currently no. 1 in the world, is actually 2nd here at 2907!!

timo boll is 2801 and wang hao 2668.  now that's funny because we have 4 us players above wang.  i guess that kinda shows how unrealistic the system is cuz those 4 players (and everyone else in north, central, and south america and the caribbean) have no chance against him.

well, i hope that clarifies things somewhat for you.  maybe someone else can jump in and explain it further...

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Post Options Post Options   Thanks (0) Thanks(0)   Quote metkar Quote  Post ReplyReply Direct Link To This Post Posted: 01/01/2007 at 3:03pm

Hi Tango

In theory ones rating can at any given moment tell how good you are. Everytime you win a match you add points to your rating, depending on how your opponent is rated. And naturally you lose points when you lose a game.

If you want to have a look at how the changes in your rating are being calculated, take a look at how it works in Denmark where I play:

 

 Unexpected result

 

 Expected result

 

 

 Win

 Lose

 Win

 Lose

 0

 0

 0

 7

 5

 1-24

 7

 5

 7

 5

 25-49

 12

 10

 6

 4

 50-74

 16

 14

 5

 3

 75-99

 19

 17

 4

 3

 100-199

 22

 20

 3

 3

 200-299

 22

 18

 2

 2

 300+

 22

 15

 1

 1

First you need to find the difference in rating between two players (lets say 1500 vs. 1455 = 45 in difference). Then you find the row where it says 25-49 in the first column. This means, that if the higher rated player wins, he will get 6 points added to his rating and the lower rated player will get 4 points deducted (Look in the two columns below "expected result). If the lower rated player wins, he will get 12 points added to his rating and the higher rated gets 10 points deducted.

It's not more than 7-8 years ago, that the rating system was introduced in Denmark (Not completely true. In fact it was brought to Denmark from USA some 20 years ago). But it was not until around 2000 it was so developed it could replace our old system. It takes a lot of ressources to registrate all matches being played. It workes perfectly now in Denmark. You can see the results of all mathes played, on the internet. Sometimes the same day they are being played, sometimes the following day, depending on the how fast the responsible people work. And the rating is being updated every two weeks. This actually means a lot. On my team we are three players within a 20 point range, so we all give an extra 20% everytime we play, because everyone of us wants to be number one.

Hope it was something like this you were looking for tango. If not, I'm sorry to have wasted your time.

 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote takaaki Quote  Post ReplyReply Direct Link To This Post Posted: 01/01/2007 at 3:34pm

very interesting post!!  i didn't know that about denmark.

anyway, now, i'm curious about the system down there in australia.  maybe you could explain that to us, tango.

also, i'm curious about other countries.  maybe other people could give an explanations about their rating systems.  i think everybody would appreciate that.

here's the usatt ratings chart:

USA Table Tennis Rating Chart

Point Spread Between Players Expected Result (Higher Rated Player Wins: number of points exchanged) Upset Result (Lower Rated Player Wins: number of points exchanged)
0 - 12 8 8
13 - 37 7 10
38 - 62 6 13
63 - 87 5 16
88 - 112 4 20
113 - 137 3 25
138 - 162 2 30
163 - 187 2 35
188 - 212 1 40
213 - 237 1 45
238 and up 0 50

For example if player A (rated 1814) defeats player B (rated 1800), player A will gain 7 points (becoming 1821), and player B will lose 7 points (becoming 1793). Players who have not played in previous USATT tournaments will be given an initial rating based on their performance in their first tournament. Additionally, players with exceptional gains following a given tournament may be given an adjusted rating. In addition to rewarding the adjusted player for his performance, this also reduces the rating losses sustained by his opponents.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote tango Quote  Post ReplyReply Direct Link To This Post Posted: 01/03/2007 at 8:45am

That's exactly the information I was after.  Thanks for taking the time to reply Takaaki and Metkar.  Much appreciated.

Well, in Australia we don't employ such as system, or atleast I'm not aware of any (quite sure though).  We just the usual ranking system where players gain ranking via wins in tournaments and in pennant, player most wins to decide leading player. 

Pretty boring.  Sorry I have nothing interesing to add Takaaki. 

Av a good one guys!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote pmnoya Quote  Post ReplyReply Direct Link To This Post Posted: 01/04/2007 at 1:50pm
How is calculated the World Raking?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote takaaki Quote  Post ReplyReply Direct Link To This Post Posted: 01/04/2007 at 2:35pm

that's actually a mystery, i think.

the only thing i know for sure is when players win an ittf singles event, they get 40 bonus points on top of the points they earn by beating the other players.

if somebody out there actually knows the answer, pls. explain--i'm sure a lot of people would like to know.

 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote metkar Quote  Post ReplyReply Direct Link To This Post Posted: 01/04/2007 at 9:06pm
I'm pretty sure, that you get "bonus" points, just to participate in Pro Tour tournaments and similar events. In fact, I wouldn't put too much in the world ranking when you go below top 20 or maybe top 50. I'm not sure how it is nowadays, but there used to be a political aspect aswell. At one point every country that participated in major events, had to have at least one player in the world ranking. Years ago we had a player from Malta playing in Denmark, who played in international events. He was ranked approx. 350 in the world but 3500 in Denmark
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pmnoya Quote  Post ReplyReply Direct Link To This Post Posted: 01/05/2007 at 8:39am

 World Raking

In this January month it had changed the system of the counting of points in comparison the December of 2006. They have given everyone an extra 10000 points.

 

World Ranking updated on: 12/1/2006 (M)
Rank Name Assoc.
1 (<<) 2568 WANG Liqin CHN
2 (<<) 2531 MA Lin CHN
3 (<<) 2525 BOLL Timo GER
4 (<<) 2434 WANG Hao CHN
5 (<<) 2325 SAMSONOV Vladimir BLR
6 (<<) 2287 CHEN Qi CHN
7 (<<) 2205 OH Sang Eun KOR
8 (<<) 2120 RYU Seung Min KOR
9 (11) 2116 SCHLAGER Werner AUT
10 (9) 2111 CHEN Weixing AUT

 

 

World Ranking updated on: 1/3/2007 (M)
Rank Name Assoc.
1 (<<) 12664 WANG Liqin CHN
2 (<<) 12625 MA Lin CHN
3 (4) 12605 WANG Hao CHN
4 (3) 12505 BOLL Timo GER
5 (<<) 12369 SAMSONOV Vladimir BLR
6 (<<) 12311 CHEN Qi CHN
7 (<<) 12304 OH Sang Eun KOR
8 (<<) 12136 RYU Seung Min KOR
9 (<<) 12135 SCHLAGER Werner AUT
10 (13) 12129 HOU Yingchao CHN

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