## Chess Elo Rating Difference CalculatorThis section will calculate the difference in Elo rating between two players from match results or winning percentage. (Margin of error uses 95% confidence.)## Elo Rating Change CalculatorThis section will calculate the change in a player's Elo rating after playing a single game against another player. The value K is the maximum change in rating. |

Wikipedia Elo

see for details on the formula used for the calculations. (You can also right click on this page and

Slow Chess Blitz

my freeware chess program.

GuiNN Checkers

my freeware neural network checkers program.