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Individual Calculations August 2023 |
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| Johnson, Jeffery W Total change: 33.20 | |   |
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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 |
| 1898 | 1608 | 1.50 | 3 | 1.02 | 40 | 40.80 | |
|  Colding, Ernest P | | | 1985 | USA | 0.50 | 1 | 0.41 | 40 | 16.40 | |  Carey, Michael P | | | 1860 | USA | 1.00 | 1 | 0.81 | 40 | 32.40 | | | Hill, Leroy | | | 1848 | USA | 0.00 | 1 | -0.20 | 40 | -8.00 | |
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) | | | NOTE: K factor changed | | 51st annual World Open - U2000 | Philadelphia, PA | USA | 2023-06-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1543 | 1608 | 2.50 | 5 | -0.38 | 20 | -7.60 | |
| | Dhingra, Sangeeta | | | 1637 | USA | 1.00 | 1 | 0.54 | 20 | 10.80 | | | Li, Audrey Keyan | | | 1310 | USA | 0.00 | 1 | -0.85 | 20 | -17.00 | | | Blomer, John | | | 1719 | USA | 1.00 | 1 | 0.65 | 20 | 13.00 | | | Rojas, Youn Sun | | | 1610 | COL | 0.00 | 1 | -0.50 | 20 | -10.00 | | | Melkonyan, Garik | | | 1439 | USA | 0.50 | 1 | -0.22 | 20 | -4.40 | |
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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