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Individual Calculations January 2018 |
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| Boldi, Ethan Total change: 2.40 | |   |
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| Fall 2017 Tuesday Night Marathon | San Francisco, California | USA | 2017-10-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1785 | 1783 | 4.50 | 7 | 0.99 | 40 | 39.60 | |
|  Wong, Russell | | | 2057 | USA | 0.00 | 1 | -0.17 | 40 | -6.80 | |  Olson, David R | | | 1383 * | USA | 1.00 | 1 | 0.08 | 40 | 3.20 | | | Cohee, James | | | 1656 | USA | 1.00 | 1 | 0.33 | 40 | 13.20 | | | Tsodikova, Natalia | | | 2133 | USA | 1.00 | 1 | 0.89 | 40 | 35.60 | | | Thornally, Frank | f | | 2048 | USA | 0.00 | 1 | -0.18 | 40 | -7.20 | | | Rakonitz, David | | | 1608 | USA | 0.50 | 1 | -0.23 | 40 | -9.20 | | | Chan, John | | | 1611 | USA | 1.00 | 1 | 0.27 | 40 | 10.80 | | | * 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) | | | | Bay Area Chess Winter 2017 Championship | Milpitas, California | USA | 2017-12-15 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1800 | 1781 | 1.00 | 4 | -0.93 | 40 | -37.20 | |
| | Perepelitsky, Phillip | | | 2100 | USA | 0.00 | 1 | -0.13 | 40 | -5.20 | | | Sartorio, William | | | 1766 | USA | 1.00 | 1 | 0.48 | 40 | 19.20 | | | Mahesh, Tejas | | | 1547 | USA | 0.00 | 1 | -0.79 | 40 | -31.60 | | | Karnavat, Ojas | | | 1786 | IND | 0.00 | 1 | -0.49 | 40 | -19.60 | |
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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