savin
Full Member
Posts: 233
|
Post by savin on Jan 18, 2006 21:58:09 GMT -5
|
|
|
|
Post by reyn on Jan 18, 2006 22:32:16 GMT -5
The ratings are updated once a week so you can view them and analyze them off line. Savin, Will there be a fixed location on the site somewhere for convenient access to these links? |
|
savin
Full Member
Posts: 233
|
Post by savin on Jan 18, 2006 23:33:00 GMT -5
Reyn,
The player page will get modified in a few key areas to give easy access to this info.
We will be changing the section of the page that shows a players rating and record and we will be changing some of the links.
In a few days we will post the first view of the new subscriber only reports that will allow a subscriber to see info on any player such as their rating history by month, their record with white and black or against particular levels of players etc.
|
|
|
|
Post by reyn on Jan 19, 2006 0:15:21 GMT -5
Excellent! Glad to hear and I look forward to these new features.  |
|
|
|
Post by Diet_Coke is better than chess on Feb 3, 2006 12:03:55 GMT -5
Can we make this sticky so people can see it right at the start?
|
|
|
|
Post by Stan Steliga on Feb 3, 2006 12:39:02 GMT -5
We are just about set with a new batch of reports. When we release them, we will announce them here and make this sticky.
|
|
|
|
Post by Diet_Coke is better than chess on Feb 3, 2006 14:16:59 GMT -5
Cheers.
|
|
|
|
Post by yitwail on Feb 3, 2006 14:31:03 GMT -5
I'm new, so beg pardon if i bring up an old topic, but looking at the new ratings for provisionals, i notice a player with a 19-17-2 record having a higher rating than a player who's 30-1-1. Using the SNC rating, the second player's rating is 2553 compared to 2263 for the first. I think this has to do with most of the 17 losses being forfeits, but does the new rating system favor players who forfeit in a losing position, rather than resign or get checkmated?
|
|
|
|
Post by Stan Steliga on Feb 4, 2006 22:23:40 GMT -5
Savin - when you get a chance, can you answer this please?
|
|
savin
Full Member
Posts: 233
|
Post by savin on Feb 8, 2006 11:43:05 GMT -5
yitwail,
You ask a very good question.
Rating System:
The purpose of a player rating is NOT to find out who is better but to allow players of similar abilities to play each other in friendly games or in tournaments. Losing 100 games in a row is not much fun and winning 100 games in a row is not much fun either. With this in mind, a players won-loss record is really not that important. If I told you that two players both played the world champion in chess 10 times and lost all 10 games would that give you any help in deciding which was the better player? Obviously not, all you know is that both of them are not as good as the world champion.
When we calculate ratings we look at the result as well as the relative ratings of the players. This means a player who played 20 games against opponents with an average rating of 2300 and lost 17 and drew 3 of them would have a higher rating than a player who plyed 20 games against players with an average rating of 1600 and won 12 of them, drew 4 and lost 4.
The difference between two players ratings can give you a very good estimate of who will win the games.
Lets say that two players have a 200 point difference in rating. In this case high rated player would be expected to win 3 out of 4 games, but the lower rated player will still in with a figthing chance. A rating difference of 400 means that the lower rated player can expect to win about 1 game in every 10 played. Rating differences of over 500 suggest that the game will not be that competitive – but the lower rated player may learn something from the experience.
Forfeits are treated differently in the new system. Any game forfeited on the first move has no effect on the ratings, its as if the game was never played. The same is true for games where a player resigns on the first move. In addition, if a player is not actively making moves at the site and starts to mass forfeit games then the games have no impact on the ratings -- the system converts mass forfeits to No Shows. So if the player you ar talking about forfeited a lot of games then most of them wwould not be reflected in the ratings.
Provisional Ratings are a little more complicated. The first thing to remember is they are an estimate only. The rating engine is lloking for "indicators". For instance, it looks at the lowest rated player that this player has lost or drawn with. It looks at the highest rated player that they have won or drawn with. It tends to ignor games outside of this range since they don't tell us much. Once a player has completed 25 games agaisnt established players (and forfeits and No shows don't count) the system works out what rating this player would need to have gotten these 25 results and not have impacted their rating. this becomes the players initial establish rating.
I hope this makes sense.
|
|
|
|
Post by yitwail on Feb 10, 2006 18:22:15 GMT -5
savin, thanks for the detailed explanation.
|
|
|
|
Post by scarecrow on Jul 25, 2006 21:45:41 GMT -5
I know a lot of people are on vacation this time of year but I am wondering if these reports are still active or if the location/format of these reports have changed as they have not been updated since the begining of the month?
|
|
|
|
Post by Stan Steliga on Jul 26, 2006 11:47:19 GMT -5
I'm trying to get an answer for you scarecrow. Savin or I will respond with a full answer soon.
|
|
|
|
Post by perseus on Aug 10, 2006 11:52:45 GMT -5
I think I will challenge the opponent immediately above me in the list, i.e. 119th. tinyurl.com/nulsnI put a Tiny URL in the challenge comment box as the full URL did not fit. |
|
|
|
Post by Stan Steliga on Aug 10, 2006 12:04:44 GMT -5
The latest post here reminded me that I was supposed to post a reply here for you scarecrow. Sorry that I didn't. The new ratings were updated over a week ago, but you probably saw that.
Sorry again.
|
|
