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Individual Calculations April 2023 |
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| De Rooy, Jack Total change: -88.80 | |   |
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| 2023 MCC Championship Rounds 4-7 | Melbourne | AUS | 2023-02-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1125 | 1366 | 0.50 | 2 | -1.10 | 40 | -44.00 | |
|  Smith, Warren | | | 1165 | AUS | 0.00 | 1 | -0.76 | 40 | -30.40 | | | Yan, Emerson | | | 1084 | AUS | 0.50 | 1 | -0.34 | 40 | -13.60 | |
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) | | | | 2023 Box Hill Summer Cup Rounds 5-7 | Melbourne | AUS | 2023-03-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1236 | 1414 | 1.50 | 3 | -0.62 | 40 | -24.80 | |
| | Zheng, Bonney | | | 1117 | AUS | 1.00 | 1 | 0.15 | 40 | 6.00 | |  Jiang, Renfei | | | 1474 | AUS | 0.00 | 1 | -0.42 | 40 | -16.80 | | | De Livera, Hamish | | | 1118 | AUS | 0.50 | 1 | -0.35 | 40 | -14.00 | |
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) | | | | 2023 Chess Artists Club Championship Rounds 5-7 | Melbourne | AUS | 2023-03-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1420 | 1414 | 1.50 | 3 | 0.00 | 40 | 0.00 | |
| | De Rooy, Samuel | | | 1387 | AUS | 0.50 | 1 | -0.04 | 40 | -1.60 | | | Kalisch, Tom | | | 1649 | AUS | 0.00 | 1 | -0.21 | 40 | -8.40 | | | Akok, Benjamin | | | 1223 | AUS | 1.00 | 1 | 0.25 | 40 | 10.00 | |
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) | | | | 2023 Ballarat Begonia Open | Ballarat | AUS | 2023-03-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1617 | 1414 | 1.00 | 5 | -0.50 | 40 | -20.00 | |
| | Healey, Leigh | | | 1485 | AUS | 1.00 | 1 | 0.60 | 40 | 24.00 | | | Jayanata, Luis Anthony | | | 1910 | INA | 0.00 | 1 | -0.04 | 40 | -1.60 | | | Tankel, Alan | | | 1758 | AUS | 0.00 | 1 | -0.12 | 40 | -4.80 | | | Chibnall, Alana | | wf | 1859 | AUS | 0.00 | 1 | -0.06 | 40 | -2.40 | | | Tang, Fergus | | | 1074 | AUS | 0.00 | 1 | -0.88 | 40 | -35.20 | |
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) | | |
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