10606 Players currently online!
Man vs. Machine - good luck!
Turn-based games at any time!
Vote for the best move to win!
Do you have what it takes?
Sharpen your tactical vision!
Get advice and game insights!
Learn from top players & pros!
View millions of master games!
Your virtual chess coach!
Perfect your opening moves!
Test your skills vs. computer!
Find the right private coach!
Can you solve it each day?
Bring it all together!
Beginners, start here!
Make friends & play team games!
News from the world of chess!
Search all Chess.com members!
Find local clubs & events!
Who's the best of your friends?
Read what members are saying!
For my chess variant Economy Chess (download) I am trying to work out a formula that gives the weaker player an advantage when playing against a stronger player. (also see an earlier thread on this) I've derived a formula that may work well, and I hope some of you will fill in some values to see if it seems correct to you.
In normal standard chess odds are given by taking away a piece (or tempo). The disadvantage of this system is that you can't give a precise advantage. I.e.: it's impossible to give someone "3/4 knight odds", because you cant take away 3/4 of a knight.
In Economy Chess this is possible because a piece has price. A knight costs 75 coins, so if you want to give "3/4 knight odds" the player gets (3/4*75=) 56 coins to start with.
So in Economy Chess players get odds by giving them startingmoney that can be spend on piece to their own good.
The goal of the formula is that players can input their own rating and the rating of their opponent. The output is a number of coins that the weaker player gets at the start.
x1 = strong player ratingx2 = weak player rating
Formula: (x1-x2)/(40 + 1.0025^x2)*25 = # of coins
Example:Me (1200) vs computer HARD (2200)(2000-1200)/(40+1.0025^1200)*25 = 333 coins
Value of the pieces in Economy Chess:Default prices (coins):Pawn: 25 Knight: 75Bisshop: 78Rook: 125Queen: 225
Some more examples:player A (900) vs player B (1100)(1100-900)/(40+1.0025^900)*25 = 101 coinsplayer A (1100) vs player B (1400)(1400-1100)/(40+1.0025^1100)*25 = 134 coins
player A (1400) vs player B (1800)(1800-1400)/(40+1.0025^1400)*25 = 137 coins
player A (1800) vs player B (2400)(2400-1800)/(40+1.0025^1800)*25 = 115 coins
Me (1200) vs Carlsen (2835)(2835-1200)/(40+1.0025^1200)*25 = 681 coins
So, if you feel like it: input your rating and that of an opponent and see if the result seems right to you. (if you dont know how to do it I can do it for you)
A very Merry Christmas to Chess.com
by A_L_I_V_E a few minutes ago
Admins: Spam alert, you may wish to check this
by adamplenty 3 minutes ago
IF I OWN THE CENTER THAT MEANS I OWN YOU!!!
by A_L_I_V_E 6 minutes ago
do Americans really see Bobby as one of the greatest players
by Herebrocker 7 minutes ago
12/24/2014 - Let's Do It Again, Mate in 3
by carlosmadura 8 minutes ago
ღ OFFICIAL 2014 Chess.com Awards ღ
by Syd_Arthur 11 minutes ago
How Do I Post A Game
by notmtwain 13 minutes ago
by Herebrocker 13 minutes ago
by DrSpudnik 14 minutes ago
♥Merry Christmas, Chess.com! ♥
by Syd_Arthur 17 minutes ago
Why Join | Chess Topics |
Help & Support |
© 2014 Chess.com
• Chess - English
We are working hard to make Chess.com available in over 70 languages. Check back over the year as we develop the technology to add more, and we will try our best to notify you when your language is ready for translating!