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Individual Calculations October 2021 |
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| Ahlborg, John Total change: -17.20 | |   |
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| 2021 Ohio Chess Congress | Akron, Ohio | USA | 2021-09-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1947 | 2178 | 1.50 | 3 | -0.86 | 20 | -17.20 | |
|  Guzman, Carlos M | | | 2009 | PUR | 1.00 | 1 | 0.28 | 20 | 5.60 | |  Tan, Ralph | | | 1929 | USA | 0.00 | 1 | -0.81 | 20 | -16.20 | | | Nguyen, James L | | | 1902 | USA | 0.50 | 1 | -0.33 | 20 | -6.60 | |
Rc - average rating of rated opponents, Ro - rating of a player in a tournament, Rp - rating performance of an unrated player, W - points won in a tournament against rated opponents, N - total number of games against rated opponents, Change - change used for calculation according to formula, K - development coefficient, Kchg - rating change of a player calculated as (K * change) | | |
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