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Chess Elo Rating Calculator
by James Madison
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Put in the ratings of the members of your chess team as shown in the initial example in the "Data Entry" section. Each member must be given a rating with the "rates" verb before any game verb can be used for that person. Start all new players with 1200 as a rating, per the Elo formula, and 0 as the game count. The game verb "beats" determines who won and lost a game. The game verb "draws" is used for a draw, and the order of names is not important. As with any web site, minimize risk of data loss by typing your data into something more stable than a browser, then pasting the content into this browser session! Press the "Calculate" button to have your results appear in the "New Ratings" section. Highlight and copy the results to paste them wherever you need them. Use those results the next time around as the starting rating for your next wave of games. The formula used is the standard Elo formula, including weighting for number of games. The calculation is done with the public code available here.
Sara rates 1648 at 27 games (-52) Henry rates 1220 at 3 games (+20) Amy rates 1196 at 4 games ( -4) John rates 836 at 18 games (+36)Ordered by name as originally provided: John rates 800 at 18 games Sara rates 1700 at 27 games Amy rates 1200 at 4 games Henry rates 1200 at 3 games Notice these are in the same form as the input. Use these as your starting ratings next time around, and add the new wave of games played. Top |
