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Individual Calculations May 2012 |
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| Perez, Robert Total change: 29.55 | |   |
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| 42nd Annual World Amateur Team and US Team East | Parsippany, New Jersey | USA | 2012-02-18 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2115 | 2284 | 3.50 | 4 | 0.66 | 15 | 9.90 | |
|  Winter, Curtis A | | | 1943 | USA | 1.00 | 1 | 0.12 | 15 | 1.80 | |  Kwartler, Lonnie S | | | 2171 | USA | 0.50 | 1 | -0.15 | 15 | -2.25 | | | Williams, Justus D | | | 2169 | USA | 1.00 | 1 | 0.34 | 15 | 5.10 | | | Schoch, Ian David | | | 2175 | USA | 1.00 | 1 | 0.35 | 15 | 5.25 | |
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) | | | | 21st Annual Eastern Class Championships | Sturbridge, Massachusetts | USA | 2012-03-02 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2285 | 2284 | 2.00 | 3 | 0.50 | 15 | 7.50 | |
| | Sharp, Dale E | | | 2031 | USA | 1.00 | 1 | 0.19 | 15 | 2.85 | | | Pismennyy, Avraam | | | 2276 | RUS | 1.00 | 1 | 0.49 | 15 | 7.35 | | | Kudrin, Sergey | g | | 2547 | USA | 0.00 | 1 | -0.18 | 15 | -2.70 | |
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) | | | | 10th Annual Southern Class Championships | Orlando, Florida | USA | 2012-03-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2348 | 2284 | 2.50 | 4 | 0.81 | 15 | 12.15 | |
| | Strugach, Leonid | | | 2120 | USA | 1.00 | 1 | 0.28 | 15 | 4.20 | | | Becerra, Julio J | g | | 2551 | USA | 0.50 | 1 | 0.32 | 15 | 4.80 | | | Rodriguez, Eric O | f | | 2317 | USA | 0.50 | 1 | 0.05 | 15 | 0.75 | | | Ritter, Mark | f | | 2402 | USA | 0.50 | 1 | 0.16 | 15 | 2.40 | |
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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