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Individual Calculations September 2009 |
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| Donatti, Sofia Total change: 0.75 | |   |
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| Primer Olimpiada del Mercosur 2009 | Mar del Plata | ARG | 2009-06-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1922 | 1749 | 0.00 | 2 | -0.54 | 15 | -8.10 | |
|  Jorquera, Valentina | | | 1957 | CHI | 0.00 | 1 | -0.23 | 15 | -3.45 | | | Estrada, Lucia | | wc | 1887 | BOL | 0.00 | 1 | -0.31 | 15 | -4.65 | |
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) | | | | XX Panamericano Mar del Plata U16 Fem | Mar del Plata | ARG | 2009-08-15 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1909 | 1796 | 2.00 | 4 | 0.59 | 15 | 8.85 | |
|  Chumpitaz, Ann | | wf | 2023 | PER | 0.00 | 1 | -0.21 | 15 | -3.15 | | | Valenzuela Astudillo, Anariky | | | 1793 | CHI | 1.00 | 1 | 0.50 | 15 | 7.50 | | | Flores, Nancy | | | 1940 | ARG | 0.00 | 1 | -0.31 | 15 | -4.65 | | | Pinargote Carreno, Kassandra | | | 1878 | ECU | 1.00 | 1 | 0.61 | 15 | 9.15 | |
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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