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Yet another computer ranking system

#1 User is online   mike777 

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Posted 2014-November-22, 21:47

www.coloradospringsbridge.com/PR_FILES/PR.HTM

USA rankings

Zia is number one at 73.59...50.00 is average

Chris Champion from Colorado Springs using ACBL tourney results from posted clubs and tournaments.

An individual's rating is his/her expected percentage if playing with and against average players.

http://www.colorados...PR_FILES/PR.HTM
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#2 User is offline   PhantomSac 

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Posted 2014-November-23, 01:25

Meck was #1 for almost forever, then Stamatov passed him. Obv it's close but off by ~21 rankings
The artist formerly known as jlall
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#3 User is online   mike777 

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Posted 2014-November-23, 01:46

fwiw

I note jeff is today number 3 by a tiny very tiny fraction.

http://www.colorados...PAGES/ALLPR.HTM
Justin is 22 out of roughly 22000 rankings

----


pair ratings just for the fun of it:
http://www.colorados...GES/PAIR_PR.HTM



35,000 pairs
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#4 User is offline   MrAce 

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Posted 2014-November-23, 03:28

 PhantomSac, on 2014-November-23, 01:25, said:

Meck was #1 for almost forever, then Stamatov passed him. Obv it's close but off by ~21 rankings


Who is Stamatov?
"Genius has its own limitations, however stupidity has no such boundaries!"
"It's only when a mosquito lands on your testicles that you realize there is always a way to solve problems without using violence!"

"Well to be perfectly honest, in my humble opinion, of course without offending anyone who thinks differently from my point of view, but also by looking into this matter in a different perspective and without being condemning of one's view's and by trying to make it objectified, and by considering each and every one's valid opinion, I honestly believe that I completely forgot what I was going to say."





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#5 User is offline   jdeegan 

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Posted 2014-November-23, 12:44

It is that 'adjustment' factor for the skill level of partners and the opponents that worries me. BBO Skill 2.0 tries the same thing. It seems to work OK for many players, but if their 'adjustment factor' is very large, you can ignore the result.

I know from experience what it is like to be the weakest player in a strong game. You are destined to go minus IMPs or minus dollars. You can try to make an 'adjustment' with a computer program, but I remain skeptical. It is even worse than computerized Power Rankings for college football teams.

Granted it may be a good marketing tool for many bridge pros. Still, how can you accurately distinguish between a hard-pressed pro dragging in a weak client in a quality field, versus one with a near-expert client playing in a weak field? Just trying ain't enuf. They need to be reasonably accurate.

Don't get me wrong, I like BBO Skill 2.0 and now use it to screen pick up partners for Speedball and other BBO pair games. Properly interpreted, it works very well. Before discovering BBO Skill 2.0 I had to laboriously analyze every player's recent hand records to separate the sheep from the goats.
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#6 User is offline   barmar 

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Posted 2014-November-23, 21:15

Use the search function and search for "coloradospringsbridge", there have been discussions and mentions of this going back to 2009.

#7 User is offline   WellSpyder 

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Posted 2014-November-24, 09:31

 mike777, on 2014-November-23, 01:46, said:

Justin is 22 out of roughly 22000 rankings

He already told us that:

 PhantomSac, on 2014-November-23, 01:25, said:

it's close but off by ~21 rankings

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#8 User is offline   FrancesHinden 

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Posted 2014-November-30, 06:02

 MrAce, on 2014-November-23, 03:28, said:

Who is Stamatov?


He is a good Bulgarian who has been playing a lot more international professional bridge in the last few years.
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#9 User is offline   MrAce 

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Posted 2014-November-30, 06:52

 FrancesHinden, on 2014-November-30, 06:02, said:

He is a good Bulgarian who has been playing a lot more international professional bridge in the last few years.


Thanks Frances
"Genius has its own limitations, however stupidity has no such boundaries!"
"It's only when a mosquito lands on your testicles that you realize there is always a way to solve problems without using violence!"

"Well to be perfectly honest, in my humble opinion, of course without offending anyone who thinks differently from my point of view, but also by looking into this matter in a different perspective and without being condemning of one's view's and by trying to make it objectified, and by considering each and every one's valid opinion, I honestly believe that I completely forgot what I was going to say."





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