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Individual Calculations May 2019 |
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| Jones, Derek Total change: -0.20 | |   |
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| 2018/19 4NCL Div 3 South Rounds 7 - 8 | Daventry | ENG | 2019-04-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1923 | 1925 | 2.00 | 2 | 0.99 | 40 | 39.60 | |
|  Michaud, Gerald | | | 1848 | CAN | 1.00 | 1 | 0.39 | 40 | 15.60 | |  Parker, Francis | | | 1998 | RSA | 1.00 | 1 | 0.60 | 40 | 24.00 | |
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) | | | | 2019 Welsh Championships | Cardiff | WLS | 2019-04-19 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1952 | 1925 | 2.50 | 7 | -0.74 | 40 | -29.60 | |
| | Brown, Thomas | | | 2079 | WLS | 0.00 | 1 | -0.29 | 40 | -11.60 | | | Fathallah, Joe | | | 1958 | WLS | 0.50 | 1 | 0.05 | 40 | 2.00 | | | Jukes, Sam | | | 1892 | WLS | 0.00 | 1 | -0.55 | 40 | -22.00 | | | Young, Alan | | | 2021 | WLS | 0.00 | 1 | -0.37 | 40 | -14.80 | | | Rathbone-Jones, Ifan | | | 1854 | WLS | 1.00 | 1 | 0.40 | 40 | 16.00 | | | Davis, Lee | | | 1922 | WLS | 0.00 | 1 | -0.50 | 40 | -20.00 | | | Guha, Chirag | | | 1941 | WLS | 1.00 | 1 | 0.52 | 40 | 20.80 | |
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) | | | NOTE: K factor changed | | Welsh Chess Premier League 2018/2019 Round 5 | Neath | WLS | 2019-04-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1920 | 1925 | 0.00 | 1 | -0.51 | 20 | -10.20 | |
| | Bevan, Peter M | | | 1920 | WLS | 0.00 | 1 | -0.51 | 20 | -10.20 | |
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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