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Individual Calculations April 2017 |
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| O Connor, Derek Total change: 40.40 | |   |
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| IM John Grefe Marathon | Berkeley, California | USA | 2017-01-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1970 | 2116 | 5.00 | 6 | 1.00 | 20 | 20.00 | |
|  Auyoung, Nathan | | | 1716 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | |  Jensen, Christian | | | 1786 | USA | 1.00 | 1 | 0.12 | 20 | 2.40 | | | Walder, Michael S | | | 1997 | USA | 1.00 | 1 | 0.34 | 20 | 6.80 | | | Viswanath Natraj, | | | 2044 | AUS | 1.00 | 1 | 0.40 | 20 | 8.00 | | | Jirasek, Ladia | | | 2279 | USA | 0.00 | 1 | -0.28 | 20 | -5.60 | | | Gaffagan, Steven | | | 1995 | USA | 1.00 | 1 | 0.34 | 20 | 6.80 | | | * 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) | | | | 2017 Bay Area Chess Spring Championship | Milpitas, California | USA | 2017-03-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1958 | 2094 | 3.00 | 3 | 1.02 | 20 | 20.40 | |
| | Peng, Andrew | | | 1777 | USA | 1.00 | 1 | 0.13 | 20 | 2.60 | | | Kim, Isaiah T | | | 1915 | USA | 1.00 | 1 | 0.27 | 20 | 5.40 | | | Bick, Gabriel J | | | 2181 | USA | 1.00 | 1 | 0.62 | 20 | 12.40 | |
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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