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Individual Calculations February 2023 |
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| Groff, Jordan Total change: 10.60 | |   |
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| 32nd annual North American Open - U2300 | Paradise, Nevada | USA | 2022-12-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1828 | 1852 | 3.00 | 5 | 0.33 | 20 | 6.60 | |
|  Xia, Joshua | | | 1656 | USA | 0.50 | 1 | -0.25 | 20 | -5.00 | |  Zhou, Chelsea | | wc | 1824 | USA | 1.00 | 1 | 0.46 | 20 | 9.20 | | | Taylor, Timothy W | m | | 2111 | USA | 0.00 | 1 | -0.18 | 20 | -3.60 | | | Wang, Maxwell Georg | | | 1645 | USA | 1.00 | 1 | 0.23 | 20 | 4.60 | | | Holliman, Bob | | | 1903 | 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) | | | | 11th annual Boston Chess Congress - Premier | Boston MA | USA | 2023-01-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2128 | 1852 | 1.00 | 4 | 0.20 | 20 | 4.00 | |
| | Hughes, John Lodger | | | 2215 | IRL | 0.00 | 1 | -0.10 | 20 | -2.00 | | | Barash, Anton | | | 2103 | USA | 1.00 | 1 | 0.81 | 20 | 16.20 | | | Graif, William | f | | 2305 | CAN | 0.00 | 1 | -0.06 | 20 | -1.20 | | | Young, Ryan | | | 1888 | USA | 0.00 | 1 | -0.45 | 20 | -9.00 | |
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) | | |
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