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Individual Calculations April 2023 |
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| De Rooy, Samuel Total change: -48.80 | |   |
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| 2023 MCC Championship Rounds 4-7 | Melbourne | AUS | 2023-02-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1547 | 1317 | 1.00 | 4 | 0.05 | 40 | 2.00 | |
|  Jaksa, David | | | 1740 | AUS | 0.00 | 1 | -0.07 | 40 | -2.80 | |  Rigney, Heath | | | 1349 | AUS | 1.00 | 1 | 0.54 | 40 | 21.60 | | | Chmiel, Rad | | | 1599 | AUS | 0.00 | 1 | -0.16 | 40 | -6.40 | | | Mortelecque, Romain | | | 1499 | FRA | 0.00 | 1 | -0.26 | 40 | -10.40 | |
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 Box Hill Summer Cup Rounds 5-7 | Melbourne | AUS | 2023-03-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1230 | 1387 | 1.00 | 2 | -0.40 | 40 | -16.00 | |
| | Lonnen, James | | | 1129 | AUS | 0.50 | 1 | -0.32 | 40 | -12.80 | | | Sucevic, Milic | | | 1331 | AUS | 0.50 | 1 | -0.08 | 40 | -3.20 | |
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) | | | | 2023 Chess Artists Club Championship Rounds 5-7 | Melbourne | AUS | 2023-03-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1426 | 1387 | 1.00 | 3 | -0.34 | 40 | -13.60 | |
| | De Rooy, Jack | | | 1414 | AUS | 0.50 | 1 | 0.04 | 40 | 1.60 | | | Shawcross, Hartley | | | 1376 | AUS | 0.50 | 1 | -0.02 | 40 | -0.80 | | | Cook, Geoff L | | | 1488 | AUS | 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) | | | | 2023 Ballarat Begonia Open | Ballarat | AUS | 2023-03-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1654 | 1387 | 0.00 | 3 | -0.53 | 40 | -21.20 | |
| | Feng, Angela | | | 1617 | AUS | 0.00 | 1 | -0.21 | 40 | -8.40 | | | Kannan, Archit | | | 1636 | AUS | 0.00 | 1 | -0.19 | 40 | -7.60 | | | Ni, Lucas | | | 1708 | AUS | 0.00 | 1 | -0.13 | 40 | -5.20 | |
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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