I've tried and tried and can't figure it out... How does the point/rating system actually work? I'm not much for caring about my points but now that i've peaked at 1254 (and should hold there for maybe another day before another well-past-due decline) I can't help but wonder how it's calculated.
Do you get more points for beating a higher opponent? Is it strictly based on your win/loss ratio?
So, can anyone do the math for me?
Skip
Originally posted by skipwillHere is the text of a post I found... It will do the math for you
I've tried and tried and can't figure it out... How does the point/rating system actually work? I'm not much for caring about my points but now that i've peaked at 1254 (and should hold there for maybe another day before another well-past-due decline) I can't help but wonder how it's calculated.
Do you get more points for beating a higher opponent? Is it strictly based on your win/loss ratio?
So, can anyone do the math for me?
Skip
A ratings calculator. Obviously now it won't figure out the correct ratings for a newbie with the latest changes made to the ratings system, but for you non-noobs here it is. The only issue I can see is the rounding to integer methods may not be identical, but it'll give you a fair idea as to the expected ratings change.
http://www7.brinkster.com/obyrne/rhp_rc.htm
and
A game jumper, input the game ID and click launch game and a window opens with the specified game.
http://www7.brinkster.com/obyrne/rhp_gamejumper.htm
enjoy.
If you Need to know that math here is the formula......
New Rating = Old Rating + K * (Score - Win Expectancy)
K is a constant (32 for 0-2099, 24 for 2100-2399, 16 for 2400 and above)
Score is 1 for a win, 0.5 for a draw and 0 for a loss.
The Win Expectancy is calculated using the following formula :
Win Expectancy = 1 / (10^((OpponentRating-YourRating)/400)+1)
The Win Expectancy is used in the rating calculation but is interesting on its own. For example, the calculation below is for a rating difference of 200. This shows that if you have a rating 200 points higher than another player, you can expect to beat them, on average, three times for each four games played.
Win Expectancy = 1 / (10^(-200/400)+1) = 0.76
Note: ^ = "to the power of", e.g. 2^3=8.
If you have a non-provisional rating and you play a provisional-rated player, then you receive (or lose) only half the number of rating points you would normally. If the provisionally-rated player has played fewer than five games, then their rating is treated as 1200 when calculating your rating.
My head is spinning a little after reading about the new provisional player rules :-(
The FAQ describes how the provisional players score is worked out, but
does it work in reverse?
EG: If Player A is on 1500 and loses to provisonal player B on "p 1200" points, the rating for player B is worked as though B was 1100 (1500 - 400), and A was 1500. Are the same effective point scores used to work out A's new rating, or does the non-provisional player use the current real scores (A=1500, B=1200)?
Thanks.
Originally posted by SandyTheGoda non-provisional rated player will lose half of the points against a p1200 player than against a 1200 player. Does this answer your question?
My head is spinning a little after reading about the new provisional player rules :-(
The FAQ describes how the provisional players score is worked out, but
does it work in reverse?
EG: If Player A is on 1500 and loses to provisonal player B on "p 1200" points, the rating for player B is worked as though B was 1100 (1500 - 400), and A was 1500. ...[text shortened]... ing, or does the non-provisional player use the current real scores (A=1500, B=1200)?
Thanks.
Sander