9003 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)
The greatest game EVER
by MelvinDoucet 2 minutes ago
8/5/2015 - Full Steam Ahead
by darshpatharkar2002 3 minutes ago
My Smith Morra Gambit Game
by Shakaali 15 minutes ago
why is ruy lopez considered the strongest
by pfren 23 minutes ago
Blitz Players Rated 1700+
by macer75 28 minutes ago
Players from small towns vs the big city: rating inflation
by verylate 47 minutes ago
Reproduction and Real Jaques of London Chess Set
by andy277 62 minutes ago
If Fischer would played Karpov for the World Champion, who would win?
by DjonniDerevnja 80 minutes ago
max seeks exceeded?
by bb_gum234 85 minutes ago
8/4/2015 - Classic King Hunt
by HusainNakara 98 minutes ago
Why Join | Chess Topics |
Help & Support |
© 2015 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!