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Individual Calculations September 2009 |
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| Lau, Robert Total change: 32.85 | |   |
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| 37th Annual World Open - Open Section | Philadelphia, Pennsylvania | USA | 2009-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2523 | 2173 | 0.00 | 1 | -0.11 | 15 | -1.65 | |
|  Yudasin, Leonid G | g | | 2523 | ISR | 0.00 | 1 | -0.11 | 15 | -1.65 | |
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) | | | | 37th Annual World Open - Under 2400 Section | Philadelphia, Pennsylvania | USA | 2009-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2231 | 2173 | 3.50 | 6 | 0.96 | 15 | 14.40 | |
|  Sorkin, Igor | | | 2345 | ISR | 0.00 | 1 | -0.27 | 15 | -4.05 | | | Kis, Lorand | | | 2189 | USA | 1.00 | 1 | 0.52 | 15 | 7.80 | | | Me, Kevin | | | 2116 | CAN | 0.50 | 1 | -0.08 | 15 | -1.20 | | | Rueda, Libardo | | | 2208 | USA | 1.00 | 1 | 0.55 | 15 | 8.25 | | | Taylor, Timothy W | m | | 2349 | USA | 0.50 | 1 | 0.23 | 15 | 3.45 | | | Filipovich, David | | | 2181 | CAN | 0.50 | 1 | 0.01 | 15 | 0.15 | |
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) | | | | 110th Annual US Open | Indianapolis, Indiana | USA | 2009-08-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2251 | 2173 | 4.50 | 7 | 1.63 | 15 | 24.45 | |
| | Robinson, Darrian | | | 1959 | USA | 1.00 | 1 | 0.23 | 15 | 3.45 | | | Hortillosa, Andres | | | 2115 | USA | 1.00 | 1 | 0.42 | 15 | 6.30 | | | Bercys, Salvijus | m | | 2434 | USA | 0.50 | 1 | 0.32 | 15 | 4.80 | | | Molner, Mackenzie | | | 2393 | USA | 1.00 | 1 | 0.78 | 15 | 11.70 | | | Finegold, Benjamin | m | | 2513 | USA | 0.00 | 1 | -0.12 | 15 | -1.80 | | | Seitzer, Phillip | | | 1920 | USA | 1.00 | 1 | 0.19 | 15 | 2.85 | | | Fernandez, Daniel | m | | 2424 | USA | 0.00 | 1 | -0.19 | 15 | -2.85 | |
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) | | | | Denker Tournament of High School Champions | Indianapolis, Indiana | USA | 2009-08-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2120 | 2173 | 2.00 | 4 | -0.29 | 15 | -4.35 | |
| | Sandberg, Evan M | | | 2146 | USA | 1.00 | 1 | 0.46 | 15 | 6.90 | | | Yang, Michael | | | 2052 | USA | 0.50 | 1 | -0.16 | 15 | -2.40 | | | Breckenridge, Steve | | | 2176 | USA | 0.00 | 1 | -0.50 | 15 | -7.50 | | | Magness, Trevor S | | | 2105 | USA | 0.50 | 1 | -0.09 | 15 | -1.35 | |
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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