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Individual Calculations September 2021 |
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| Morgan, Jerry Total change: 5.40 | |   |
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| 2021 GM Koltanowski Marathon | Berkeley, California | USA | 2021-06-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1620 | 1492 | 1.50 | 4 | 0.16 | 20 | 3.20 | |
|  Del Rosario, Frisco | | | 1708 | USA | 0.00 | 1 | -0.22 | 20 | -4.40 | |  Shrauger, Alex | | | 1688 | USA | 0.00 | 1 | -0.25 | 20 | -5.00 | | | Auyoung, Nathan | | | 1655 | USA | 1.00 | 1 | 0.72 | 20 | 14.40 | | | Nagel, Ralph | | | 1430 | USA | 0.50 | 1 | -0.09 | 20 | -1.80 | |
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) | | | | Mechanics Institute Tuesday Night Marathon July-August 2021 - Reserve | San Francisco, California | USA | 2021-07-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1599 | 1480 | 1.50 | 4 | 0.11 | 20 | 2.20 | |
| | Hope, Frederick | | | 1694 | USA | 0.00 | 1 | -0.23 | 20 | -4.60 | | | Rakonitz, David | | | 1575 | USA | 0.00 | 1 | -0.37 | 20 | -7.40 | | | Casares Jr, Nick | | | 1454 | USA | 1.00 | 1 | 0.46 | 20 | 9.20 | | | Cortinas, Marty | | | 1674 | USA | 0.50 | 1 | 0.25 | 20 | 5.00 | |
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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