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Individual Calculations September 2023 |
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| Walder, Michael Total change: -32.60 | |   |
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| 2023 Calchess Senior Championship | Berkeley, Ca | USA | 2023-06-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1913 | 1854 | 1.00 | 3 | -0.26 | 20 | -5.20 | |
|  Bridle, Sam | | | 1610 | USA | 0.00 | 1 | -0.80 | 20 | -16.00 | |  Taylor, Timothy W | m | | 2103 | USA | 0.50 | 1 | 0.31 | 20 | 6.20 | | | Winslow, Elliott | m | | 2025 | USA | 0.50 | 1 | 0.23 | 20 | 4.60 | |
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) | | | | WIM Ruth Haring Memorial Tuesday Night Marathon - Over 2000 Round 1-3 | San Francisco, CA | USA | 2023-07-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1700 | 1859 | 0.50 | 1 | -0.21 | 20 | -4.20 | |
| | Sankar, Arjun | | | 1700 | USA | 0.50 | 1 | -0.21 | 20 | -4.20 | |
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) | | | | WIM Ruth Haring Memorial Tuesday Night Marathon - Over 2000 Round 4-7 | San Francisco, CA | USA | 2023-08-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1802 | 1859 | 0.00 | 2 | -1.16 | 20 | -23.20 | |
| | Kagle, Sasha | | | 1883 | USA | 0.00 | 1 | -0.47 | 20 | -9.40 | | | Qiu, Laurie | | | 1721 | USA | 0.00 | 1 | -0.69 | 20 | -13.80 | |
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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