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Individual Calculations April 2009 |
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| Lenderman, Alex Total change: -10.10 | |   |
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| 4th Annual Empire State Open | Saratoga Springs, New York | USA | 2008-12-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2315 | 2443 | 1.50 | 3 | -0.46 | 10 | -4.60 | |
|  Arkell, Keith C | g | | 2521 | ENG | 0.00 | 1 | -0.39 | 10 | -3.90 | |  Enkin, Max | | | 2259 | USA | 0.50 | 1 | -0.24 | 10 | -2.40 | | | Wang, Eigen | | | 2166 | USA | 1.00 | 1 | 0.17 | 10 | 1.70 | |
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) | | | | Happy New Year Open | New York, New York | USA | 2009-01-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2335 | 2444 | 2.00 | 3 | 0.14 | 10 | 1.40 | |
| | Ortiz, Olson | f | | 2319 | DOM | 1.00 | 1 | 0.33 | 10 | 3.30 | | | Fleischman, Eric J | | | 2097 | USA | 1.00 | 1 | 0.11 | 10 | 1.10 | | | Kacheishvili, Giorgi | g | | 2590 | GEO | 0.00 | 1 | -0.30 | 10 | -3.00 | |
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) | | | | 39th Annual World Amateur Team & US Team East | Parsippany, New Jersey | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2151 | 2444 | 1.00 | 2 | -0.69 | 10 | -6.90 | |
| | Lu, Edward J | | | 2207 | USA | 0.00 | 1 | -0.80 | 10 | -8.00 | | | Kats, Alena | | | 2094 | USA | 1.00 | 1 | 0.11 | 10 | 1.10 | |
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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