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Individual Calculations January 2009 |
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| Williams, Peter A Jnr Total change: -5.40 | |   |
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| European Youth Chess Championship 2008 - Boys U12 | Herceg Novi | MNE | 2008-09-15 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1693 | 1867 | 1.00 | 3 | -1.13 | 15 | -16.95 | |
|  Zaynutdinov, Iskander | | | 1851 | RUS | 0.50 | 1 | -0.02 | 15 | -0.30 | | | Ignat, Ilie | | | 1557 | MDA | 0.00 | 1 | -0.86 | 15 | -12.90 | |  Andias, Joao Pedro Menezes | | | 1672 | POR | 0.50 | 1 | -0.25 | 15 | -3.75 | |
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) | | | | Caterham Open | Caterham | ENG | 2008-10-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2058 | 1911 | 2.00 | 4 | 0.78 | 15 | 11.70 | |
| | Wilson, Alexandra | | wf | 2026 | SUI | 0.50 | 1 | 0.16 | 15 | 2.40 | | | Foster, James C | | | 1992 | ENG | 1.00 | 1 | 0.61 | 15 | 9.15 | | | Atako, Chino | | | 2100 | ENG | 0.00 | 1 | -0.25 | 15 | -3.75 | | | Fernandez-Espana, Marco | | | 2115 | ESP | 0.50 | 1 | 0.26 | 15 | 3.90 | |
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) | | | | Wellington College International | Crowthorne | ENG | 2008-11-07 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1989 | 1911 | 2.50 | 6 | -0.01 | 15 | -0.15 | |
| | Arkell, Keith C | g | | 2261 | ENG | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Periasamymanjula, Manibharathi | | | 1704 | ENG | 1.00 | 1 | 0.23 | 15 | 3.45 | | | Rudd, Jack | f | | 2261 | ENG | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Ynojosa, Angelica Maria | | | 1725 | ENG | 0.50 | 1 | -0.24 | 15 | -3.60 | | | Gibbs, Dominic V | | | 1970 | ENG | 0.50 | 1 | 0.08 | 15 | 1.20 | | | Jain, Akash | | | 2010 | ENG | 0.50 | 1 | 0.14 | 15 | 2.10 | |
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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