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Individual Calculations August 2023 |
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| Rogers, Norman Total change: -34.00 | |   |
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| 13th annual World Open Senior Amateur | Philadelphia, PA | USA | 2023-06-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1877 | 2056 | 2.00 | 3 | -0.09 | 20 | -1.80 | |
|  Sperber, Ronald David | | | 1656 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Hill, Leroy | | | 1848 | USA | 0.00 | 1 | -0.77 | 20 | -15.40 | | | Carswell Jr, Herbert | | | 2128 | USA | 1.00 | 1 | 0.60 | 20 | 12.00 | | | * 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) | | | | 51st annual World Open - Open | Philadelphia, PA | USA | 2023-06-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1846 | 2056 | 4.50 | 8 | -1.61 | 20 | -32.20 | |
| | Kowalysko, Roman | | | 1888 | USA | 1.00 | 1 | 0.28 | 20 | 5.60 | |  Jin, Austin | | | 1723 | USA | 0.00 | 1 | -0.88 | 20 | -17.60 | | | Feng, Andrew T | | | 1850 | USA | 0.00 | 1 | -0.76 | 20 | -15.20 | | | Pillai, Adithya | | | 1867 | USA | 1.00 | 1 | 0.25 | 20 | 5.00 | | | Stancil, Kimani A | | | 1874 | USA | 1.00 | 1 | 0.26 | 20 | 5.20 | | | Guo, Anni | | | 1811 | CAN | 0.00 | 1 | -0.80 | 20 | -16.00 | | | Xia, Ruoxiao | | | 1912 | USA | 1.00 | 1 | 0.31 | 20 | 6.20 | | | Ji, Y Owen | | | 1844 | USA | 0.50 | 1 | -0.27 | 20 | -5.40 | |
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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