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Individual Calculations September 2021 |
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| Peretz, Malkiel Total change: 11.60 | |   |
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| Israel Senior Championship Semi-final, Lasker Tel Aviv | Tel Aviv | ISR | 2021-07-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1851 | 2140 | 5.50 | 6 | 0.61 | 20 | 12.20 | |
|  Waisberg, Arnold | | | 1740 * | ISR | 1.00 | 1 | 0.08 | 20 | 1.60 | |  Dotan, Valeria | | wf | 1891 | ISR | 1.00 | 1 | 0.19 | 20 | 3.80 | | | Kaldor, Avraham | m | | 2186 | ISR | 0.50 | 1 | 0.06 | 20 | 1.20 | | | Zilbershtein, Victor | | | 1740 * | ISR | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Shorek, Mordechai | | | 1808 | ISR | 1.00 | 1 | 0.12 | 20 | 2.40 | | | Cohen, Danny | | | 1740 * | ISR | 1.00 | 1 | 0.08 | 20 | 1.60 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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) | | | | Liga Arzit Merkaz 2021 Round 9 | Various | ISR | 2021-08-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2103 | 2127 | 0.50 | 1 | -0.03 | 20 | -0.60 | |
| | Levitsky, Artur | | | 2103 | ISR | 0.50 | 1 | -0.03 | 20 | -0.60 | |
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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