Author: Christophe Theron
Date: 03:24:17 06/13/01
Go up one level in this thread
On June 13, 2001 at 06:15:02, Uri Blass wrote:
>On June 13, 2001 at 05:57:11, Christophe Theron wrote:
>
>>On June 13, 2001 at 05:35:30, stuart taylor wrote:
>>
>>>On June 13, 2001 at 05:05:45, Marcus Kaestner wrote:
>>>
>>>>
>>>>>
>>>>>It is the most reliable tool that we have to evaluate the chess programs. The
>>>>>difference in the opponents each program has to face does not matter from a
>>>>>mathematical point of view.
>>>>
>>>>i think you are wrong!
>>>>
>>>>having now over two years of experience with my own chessbits-lists, i can say
>>>>to you that it is VERY easy to place a program with a HIGHLY overrated (or
>>>>underrated) position into the list.
>>>>
>>>>there are dozens of possibilities to fake a rating.
>>>>
>>>>i do not say that the ssdf fakes, i only say that it DOES matter which opponents
>>>>you choose.
>>>>
>>>>marcus
>>>
>>>Of course it does!
>>>If you play a 1200 elo rated player you can be sure to win 100% of times, and
>>>you play 100,000 games, you will have got a rating of 3000 long long before
>>>then.
>>
>>
>>
>>No you are definitely wrong.
>>
>>Due to the elo calculation formulas, a program which wins 100% of its games
>>against a 1200 elo opponent will have a rating of exactly 1600.
>>
>>Far from 3000, isn't it?
>>
>>Food for thoughts.
>
>It is truth by the linear formula but not by the right formula.
>The linear formula is only approximation to the right formula
>
>Here is a better formuala:
>
>If you score an average of P points in every game then your rating is
>400logP/(1-P) more than your opponent when you use log by basis 10.
>
>It means that difference of 400 means that you beat your opponent 10-1
>800 elo difference means that you beat your opponent 100-1
>1200 elo difference means that you beat your opponent 1000-1
>
>You do not get never 100% by this formula unless your rating is infinite.
>
>Uri
Do you mean 400log(P/(1-P))?
By this formula, if you win against a 1200 elo opponent by a score of 1000-1,
then your rating is 2400, right?
Christophe
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.