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Individual Calculations April 2009 |
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| Needham, Bryan Total change: -8.50 | |   |
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| Costa Rican National Championship Phase 1.1 | San Jose | CRC | 2009-01-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2024 | 2005 | 2.50 | 6 | -0.34 | 25 | -8.50 | |
|  Cabrera, Marco Antonio | | | 2109 | CRC | 0.00 | 1 | -0.36 | 25 | -9.00 | |  Duran Vega, Andres | | | 1975 | CRC | 1.00 | 1 | 0.46 | 25 | 11.50 | | | Solano Lopaz, Royner | | | 2083 | CRC | 1.00 | 1 | 0.61 | 25 | 15.25 | | | Machado Ramirez, Allan | | | 1996 | CRC | 0.00 | 1 | -0.51 | 25 | -12.75 | | | Montenegro, Esteban | | | 2013 | CRC | 0.50 | 1 | 0.01 | 25 | 0.25 | | | Rodriguez, David | | | 1968 | CRC | 0.00 | 1 | -0.55 | 25 | -13.75 | |
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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