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Individual Calculations July 2009 |
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| Porter, Ryan W Total change: -4.95 | |   |
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| 2009 Lina Grumette Memorial Day Classic | Los Angeles, California | USA | 2009-05-23 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2270 | 2284 | 2.50 | 4 | 0.41 | 15 | 6.15 | |
|  Williams, John R | | | 2122 | USA | 1.00 | 1 | 0.29 | 15 | 4.35 | |  Sevillano, Enrico | m | | 2520 | USA | 0.00 | 1 | -0.20 | 15 | -3.00 | | | Yurenok, Sergey | | | 2231 | USA | 0.50 | 1 | -0.07 | 15 | -1.05 | | | Yanayt, Eugene | f | | 2207 | USA | 1.00 | 1 | 0.39 | 15 | 5.85 | |
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) | | | | 2009 National Open | Las Vegas, Nevada | USA | 2009-06-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1960 | 2284 | 1.00 | 2 | -0.74 | 15 | -11.10 | |
| | He, Tommy O | | | 1934 | USA | 1.00 | 1 | 0.11 | 15 | 1.65 | | | Heung, Christopher | | | 1985 | USA | 0.00 | 1 | -0.85 | 15 | -12.75 | |
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) | | |
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