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Fast Rating Switch?

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20th October 2007, 05:02am
#1
by MolotovRuss
Hampshire England
Member Since: Aug 2007
Member Points: 229

I find it quite annoying when I accept say, the challenge of a 1350 player (that's high-end for me), and by the time I know I'm close to winning again, I look again at their rating and they've dropped to 1200 or under.

Of course, this is a symptom of online chess, and playing simultaneous games (you can lose 10 games through the duration of 1).

So, admins and masters of chess.com, does this mean I win less points by the end of the game if I win? 


20th October 2007, 05:28am
#2
by frenchduke
Uki Australia
Member Since: Sep 2007
Member Points: 80
short answer, yes
20th October 2007, 05:36am
#3
by MolotovRuss
Hampshire England
Member Since: Aug 2007
Member Points: 229
In that case, can we not gain/lose points at the end of the game depeding on their rating when the game commenced, rather than when it finished?
20th October 2007, 05:53am
#4
by frenchduke
Uki Australia
Member Since: Sep 2007
Member Points: 80

im not sure, although i answered your question as a master of chess.com, im only one in my head. Im assuming the reason for it is that if your opponent drops to a lower rating during your game, technically they were that rating before your game. As they likely didn't get worse. And if they did get worse, perhaps your rating shouldnt go up as high for beating a worse player. This may not be the reason, i am just guessing

 


20th October 2007, 05:58am
#5
by MolotovRuss
Hampshire England
Member Since: Aug 2007
Member Points: 229

But when you commence a game, you're commencing with a guy of that rating, knowing that you're playing someone on the level their rating corresponds with, and, will win/lose the points corresponding to the relationship between their rating and your own. Therefore, if their rating changed dramatically during the game, the rules that you had assumed were set when you began have just completely changed.

 

If I'm wrong, tell me, because I think this should be changed. 


20th October 2007, 06:08am
#6
by piotr
PoznaƄ Poland
Member Since: May 2007
Member Points: 251
MolotovRuss wrote:

 changed dramatically during the game, the rules that you had assumed were set when you began have just completely changed. 


Yes, but you have already finished the game. Maybe you were wrong at the beginning and your opponent is too strong/too weak. But it has nothing to do with the rating calculations. If they are stronger (higher rated) and you win, why not to increase your rating more then?

I know Jay discussed the issue with some experienced chess players. I have to say that in the beginning I thought it is wrong.


20th October 2007, 06:34am
#7
by MolotovRuss
Hampshire England
Member Since: Aug 2007
Member Points: 229

What do you mean by "Yes, but you have already finished the game." ?

 

What I mean is, If I were to play you right now piotr,I know that your rating is 1791, so I would gain 'X' points for a win, lose 'Y' points for a Loss, and (in this case) gain 'Z' Points for a draw. Now, if during the duration of this game, you lose a hack of a lotof games, to the point your rating was lower than mine, then if I won, I've going to win about 1/4x! And if you win another 50 games during this game, I'm going to be losing about 2y!

 

See where I'm coming from? Anyone agree?


20th October 2007, 06:51am
#8
by frenchduke
Uki Australia
Member Since: Sep 2007
Member Points: 80
Look at it the other way. If he looses a heck of a lot of games, then you loose, you loose only 1/4x points. If he wins a heck of a lot of games, and you win, you gain 2y. To each negative there is a positive.
20th October 2007, 07:00am
#9
by MolotovRuss
Hampshire England
Member Since: Aug 2007
Member Points: 229
Very true, but I went in perfectly prepared to lose, but I shouldn't have to prepare for an even bigger loss, because my opponent wipes out a load of other players in entirely unrelated games before our game comes to an end.
20th October 2007, 07:37am
#10
by doctor-ice
bellingham,ma United States
Member Since: Jul 2007
Member Points: 242
MolotovRuss wrote:

What do you mean by "Yes, but you have already finished the game." ?

 

What I mean is, If I were to play you right now piotr,I know that your rating is 1791, so I would gain 'X' points for a win, lose 'Y' points for a Loss, and (in this case) gain 'Z' Points for a draw. Now, if during the duration of this game, you lose a hack of a lotof games, to the point your rating was lower than mine, then if I won, I've going to win about 1/4x! And if you win another 50 games during this game, I'm going to be losing about 2y!

 

See where I'm coming from? Anyone agree?


yes. not being a chess.com master or anywhere close to that,logically one would think that the plusses/minusses to your/his(hers) rating should be "etched in stone" until the completion of that game. however i am not sure what the "experts" would say--anyone willing to comment?


23rd October 2007, 02:58am
#11
by rockbadger
Sussex, UK United Kingdom
Member Since: Jul 2007
Member Points: 64

I think the problem is more with new players who are clearly a much higher standard than 1200. I tend to take on people of whatever rating, including new people to the site. Many times I've lost to people of 1200 or something close to that, losing a bagload of rating points whose play is clearly much more like 1700.

Chess.com rating doesn't really matter at all, but you're going to play someone of genuine 1200 rating quite differently to somone of 1900.


23rd October 2007, 03:21pm
#12
by jay
San Jose, CA United States
Member Since: May 2007
Member Points: 1024

A rating is an "estimate" of a player's skill. This means that ratings are never exact, and always changing to try and get closer to the actual player's skill level. Therefore, when you win or lose a game, you are compared to your opponents CURRENT skill level or rating, and your rating is adjusted according to the most accurate (latest) rating that they have in order to adjust your rating as most accurately as possible.

 

It works both ways. If you start a game against a 1500 rated player (who is actually much stronger), and by the time you win your game, they have won 3 other games, their rating is now 1800, you should get credit for beating an 1800 rated player.

 

Just as if you start a game against an OVERRATED 1500 rated player, and by the time you win your game they have dropped down to 1300, you should only get credit for beating a 1300 rated player.

 

This is the correct way of adjusting ratings in chess.


24th October 2007, 03:08pm
#13
by MolotovRuss
Hampshire England
Member Since: Aug 2007
Member Points: 229
True I see what you mean jay, but I still think the overall points you win should be according to their rating when you accepted.
24th October 2007, 04:38pm
#14
by Bishop357
Hazard,Ky United States
Member Since: Oct 2007
Member Points: 72
MolotovRuss wrote: Very true, but I went in perfectly prepared to lose, but I shouldn't have to prepare for an even bigger loss, because my opponent wipes out a load of other players in entirely unrelated games before our game comes to an end.

 Never,Ever,go in thinking you will lose or you will.I go into every game for a win. That said,If you play an opponent and there rating changes you are still playing the same opponent.Except your win or loss and go on...


25th October 2007, 12:02am
#15
by HotFlow
KL, Malaysia Malaysia
Member Since: Sep 2007
Member Points: 529
I dislike the games against new 1200 rated opponents also, really throws rating out of sink. 
25th October 2007, 12:07am
#16
by greyfox
manila, philippines Philippines
Member Since: Sep 2007
Member Points: 182
HotFlow wrote: I dislike the games against new 1200 rated opponents also, really throws rating out of sink. 

 but you also started with a 1200 rating right?? if you move back the time you can say that to yourself my friend.


25th October 2007, 12:10am
#17
by greyfox
manila, philippines Philippines
Member Since: Sep 2007
Member Points: 182
MolotovRuss wrote:

I find it quite annoying when I accept say, the challenge of a 1350 player (that's high-end for me), and by the time I know I'm close to winning again, I look again at their rating and they've dropped to 1200 or under.

Of course, this is a symptom of online chess, and playing simultaneous games (you can lose 10 games through the duration of 1).

So, admins and masters of chess.com, does this mean I win less points by the end of the game if I win? 


 my answer is yes. so if you play here primarily just to earn high rating point, you resign the games that you are sure youre losing so that when you win a game, you will get additional rating as high or maybe higher than you expected.

 

but there are games that even material down is playable. 


25th October 2007, 12:26am
#18
by HotFlow
KL, Malaysia Malaysia
Member Since: Sep 2007
Member Points: 529

greyfox

>but you also started with a 1200 rating right?? if you move back the time you can say that to yourself my friend.<

Your missing the point and I don't really have the will power to try and explain it to you.


25th October 2007, 05:58pm
#19
by RoBo
United States
Member Since: Aug 2007
Member Points: 17
i am with russ on this one. gets frustrating when you take on a player that you percieve to be better than you, but by the end of the match they are less than you and you now (theoretically) assume more risk for a loss.
25th October 2007, 06:15pm
#20
by Loomis
Durham, NC United States
Member Since: Oct 2007
Member Points: 2164

The reason to calculate a rating a certain way is not based on how the users feel. It is based on what gives the most accurate set of ratings. The way the ratings are calculated -- adjustments made based on the ratings at the time of game completion -- generates the most accurate set of ratings.

 

In general, most players ratings will be fairly stable. They will rarely change hundreds of points during the course of your game (this is different for new users).


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