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Individual Calculations December 2023 |
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| De Rooy, Jack Total change: 2.80 | |   |
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| 2023 Hobsons Bay Reserves Championship Rounds 4-6 | Melbourne | AUS | 2023-10-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1248 | 1317 | 1.50 | 3 | -0.28 | 40 | -11.20 | |
|  Chalamcharla, Shrevin | | | 1215 | AUS | 0.50 | 1 | -0.14 | 40 | -5.60 | |  Vagh, Riyan | | | 1145 | AUS | 1.00 | 1 | 0.27 | 40 | 10.80 | | | Davis, Sophie | | | 1385 | AUS | 0.00 | 1 | -0.41 | 40 | -16.40 | |
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) | | | | 2023 Chess Artists Open Rounds 1-3 | Melbourne | AUS | 2023-11-12 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1293 | 1347 | 1.50 | 2 | 0.35 | 40 | 14.00 | |
| | De Rooy, Samuel | | | 1243 | AUS | 0.50 | 1 | -0.14 | 40 | -5.60 | | | Beckman, John | | | 1343 | AUS | 1.00 | 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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