Chess Calculator is designed for FIDE chess players of all rating categories. It calculates all Elo results for a game, tournament, or chess event by the rules of FIDE. Chess Calculator displays Rating Change, Rating Increase, Performance Rating, New Rating, Expected Result, Opponents' Average, Grandmaster and International Master Norms. Chess Calculator has been tested with the FIDE Players' Database and Tables of Grandmaster and International Master Norms. Designed for comfort, it is a friendly, powerful, all-in-one, and simple chess Elo computing program. Here are some key features of "Chess Calculator": - Option to set the K-factor values to others than 10, 15, 25. - Option to save all the data at exit. - Quick autotabbing of the Individual Ratings text boxes. - Quick tabbing of the key text boxes by pressing "Z". - The Clean All the Data and Undo functions. - Menu and Toolbar commands support. - 4-icon support for the program's shortcut. - 2-file Help System, the Tips Window. Limitations: - 15 days trial. There are 2 basic types of licenses: 1. A Single Computer Usage License: You may use one copy of the version of the program on one computer. Price: USD $14.95. 2. A Multiple 2-Computer Usage License: You may use one copy of the version of the program on two computers. Price: USD $17.95.