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Individual Calculations April 2019 |
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| Oconnor, Derek Total change: 17.00 | |   |
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| 2019 IM John Grefe Marathon | Berkeley, California | USA | 2019-01-18 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2066 | 2275 | 4.00 | 5 | 0.32 | 20 | 6.40 | |
|  Aung, Grant | | | 1875 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | |  Ater, Itai | | | 2182 | ISR | 1.00 | 1 | 0.37 | 20 | 7.40 | | | Winslow, Elliott Charles | m | | 2220 | USA | 0.00 | 1 | -0.58 | 20 | -11.60 | | | Veres, Richard K | | | 1875 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Poehlmann, Roger | | | 2178 | USA | 1.00 | 1 | 0.37 | 20 | 7.40 | | | * 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) | | | | 26th Annual Western Class Championships | Van Nuys, California | USA | 2019-03-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2182 | 2256 | 3.50 | 5 | 0.53 | 20 | 10.60 | |
| | Flores, Andrew | | | 1983 | USA | 1.00 | 1 | 0.17 | 20 | 3.40 | | | Somalwar, Anaiy | | | 2091 | USA | 1.00 | 1 | 0.28 | 20 | 5.60 | | | Gareyev, Timur | g | | 2557 | USA | 0.00 | 1 | -0.15 | 20 | -3.00 | | | Althebaiti, Ahmed | c | | 1976 | KSA | 1.00 | 1 | 0.16 | 20 | 3.20 | | | Wang, Annie | f | wm | 2304 | USA | 0.50 | 1 | 0.07 | 20 | 1.40 | |
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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