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Individual Calculations November 2021 |
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| Cortinas, Marty Total change: -0.80 | |   |
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| Mechanics Institute Tuesday Night Marathon September-October 2021 - Under 1800 | San Francisco, California | USA | 2021-09-07 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1534 | 1655 | 2.50 | 4 | -0.04 | 20 | -0.80 | |
|  Olson, David | | | 1255 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Hack, Richard | | | 1568 | USA | 1.00 | 1 | 0.38 | 20 | 7.60 | |  Parsons, Stephen | | | 1512 | USA | 0.50 | 1 | -0.19 | 20 | -3.80 | | | Porlares, Teodoro | | | 1800 | USA | 0.00 | 1 | -0.31 | 20 | -6.20 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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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