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Individual Calculations September 2023 |
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| Cooper, Lee Total change: 45.60 | |   |
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| 2023 Calchess Senior Championship | Berkeley, Ca | USA | 2023-06-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1822 | 1611 | 2.50 | 3 | 1.67 | 40 | 66.80 | |
|  Anderson, Michael Gene | | | 1780 | USA | 1.00 | 1 | 0.72 | 40 | 28.80 | | | Mazzarelli, Ariel Diego | | | 2075 | USA | 1.00 | 1 | 0.95 | 40 | 38.00 | |  Bridle, Sam | | | 1610 | USA | 0.50 | 1 | 0.00 | 40 | 0.00 | |
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) | | | | WIM Ruth Haring Memorial Tuesday Night Marathon - 1600 to 1999 Round 1-3 | San Francisco, CA | USA | 2023-07-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1458 | 1562 | 0.00 | 2 | -1.28 | 40 | -51.20 | |
| | Chan, John | | | 1491 | USA | 0.00 | 1 | -0.60 | 40 | -24.00 | | | Hack, Richard | | | 1425 | USA | 0.00 | 1 | -0.68 | 40 | -27.20 | |
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 - 1600 to 1999 Round 4-7 | San Francisco, CA | USA | 2023-08-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1515 | 1562 | 3.00 | 4 | 0.75 | 40 | 30.00 | |
| | Henderson-Jr, Se | | | 1489 | USA | 1.00 | 1 | 0.40 | 40 | 16.00 | | | Uzakbaev, Nursultan | | | 1459 | USA | 1.00 | 1 | 0.36 | 40 | 14.40 | | | Gu, Chunhui | | | 1449 | USA | 1.00 | 1 | 0.35 | 40 | 14.00 | | | Kingma, Karl | | | 1663 | USA | 0.00 | 1 | -0.36 | 40 | -14.40 | |
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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