? on rating system
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This site uses the Glicko rating system. Your decrease in rating has nothing to do with how you played or won that game. However, your opponent had a rating of 423, which is very much lower than yours, and I think that this affected your rating negatively even though you won. Continue to play higher rated players and you will eventually see your rating stabilize.
Hi Rob, not sure if you are confusing both ratings, but you have one (well 3 actually, one for each of the 3 different time/speed games) rating for Live Chess and one for the rest of chess here on the site. So, which sort of game was it you played?
I note ye have played one match and won it here on the site, so your main rating has gone up to 1209. Your "quick" live rating is still 1200, "long" live rating 1277, so ye must have won there, and your "blitz" live rating is 885 so ye must have lost there.
Time taken to move does not affect rating, unless ye run out of time and loose of course, then ye simply loose, but time otherwise does not affect ratings. Also, "poor moves" do not affect rating, ye cant be docked by the computer like that as ye wondered.
If you did win, your rating should not have gone down. Perhaps you were looking at one of your other ratings? In live chess it deppends on the length of game, so perhaps it was a long game you won and you looked at your blitz rating?
Welcome and cheers :)
Ok, it was a Live Chess game? I'm not sure but I suspect that the Glicko system is used there too and that your rating may actually drop even if you win against a much lower rated opponent.
Heya Jan :) as far as i know, your rating should never drop, if you win. Only it would go up very slowly if you only play people ranked far below you.
The way glicko system works is to take account of the number of games and time between games, to give a more accurate reading of the result between 2 people, which basically means a win or loss may have a bigger or smaller change in rating, but it couldnt give a negative rating for winning.
I think he must have looked at one of his other ratings.
More info here, with a link to the complex forumlas for working it out.
http://www.chess.com/article/view/chess-ratings---how-they-work
Also Akuni from this site posted a wee explaination which helps as well:
"Well, the Glicko RD is the Rating Deviation first used in the Glicko Rating system. The RD is the range of possible ratings someone could have (this is ackknowledging that ratings are innaccurate). To find the range, double your RD and add and subtract it from your rating (This makes sense if you know about Normal Distribution but never mind that). So someone rated 1500 with an RD of 50, their range is 1400-1600.
How it is used in rating calculations is somewhat complicated, but basically, it is an extra value that affects how much your rating changes. A higher Glicko RD means that your rating changes by more after a game finishes, and so does your opponent's. Some systems, like the Elo system, take into account only scores and current ratings. Others, like Chessmetrics (I think) and chess.com use this as well. Over time of inactivity (No completed games) your Glicko RD will increase. For example, it could be, "After 30 days without any finished games, a player's RD will increase by 1 per day". Also note: I just made this one up.
The reason for this is because a rating's accuracy is dependent on current results reflecting current strength and that the longer you go without results the less accurate your rating becomes. So to compensate for your rating no longer being as accurate, the Glicko RD is added and the longer you go without games, the more your rating will change.
Both your RD and your opponent's RD are taken into account. Your RD will decrease every time you finish a game."
edit: example - if i were to play the 423 rating player that Rob played on the site here.. the results in rating change for me would be:
win: +1, draw: -14, loss: -27
So even though that person is about 1500 below me, i would still get a point.
True, Pistoleer. I studied the Glicko formula and it shouldn't be possible to loose rating points on a win, as I first suggested, since in Glicko the following is applied (on win):
NewRating = OldRating + K * (1 - E)
where K > 0 and E < 1, and K takes the RD into account (K and E calculated using other formulas)
However, I remember a time back when I heard of a similar thing, that one actually had lost points on a win. Just can't remember where I read or heard this.
Your rating can actually go down if you play much weker players?? I didn't know this.. I thought if you play a much lower rated opponent you simply won't gain any rating points, but not lose them even if you win... that doesn't make any sense!
Hey coolness....thanks for all the responses.
I do have some research under way, but your comments at least get in the ballpark. I do think I am confusing the different types of games....Online, and the 3 speeds of Live. Funny thing is, after I won a Live Long match by forfeit, it looked as if my rating went down in that catagory, but when I play another match against someone else, it went back up to where it was before?
So....most likely it is I whi is confised, noth teh system :)
Good group here....glad to be a part
thanks
Rob
Hi all,
I will read about the rating system, but have a quick question re: how it works.
I am new to this site.....and have the basic rating of 1200.
Just played a game on Live Chess, and won by the other players' resignation.
My rating then went down to 1064. Is that because I won by resignation,
or because I made some poor moves that the computer 'docked mypay' for.
i.e. lowered my rating because I could have made better moves.
Also, does ammount of time it takes a person to make their move effect one's rating?
Again, I will read up on the subject and search the forum, as I am sure this has been discussed often, but if anyone could point me in the right direction, I'd appreciate it.
Thanks
Robster