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Individual Calculations April 2009 |
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| Brenes, Juan Carlos Total change: -4.50 | |   |
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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 |
| 1965 | 1997 | 2.00 | 4 | -0.18 | 25 | -4.50 | |
|  Da Bosco, Carla | | wf | 1946 | CRC | 0.00 | 1 | -0.57 | 25 | -14.25 | |  Urena, Omar | | | 1951 | CRC | 1.00 | 1 | 0.44 | 25 | 11.00 | | | Duran Vega, Andres | | | 1975 | CRC | 0.00 | 1 | -0.53 | 25 | -13.25 | | | Trejos, Shirley | | | 1986 | CRC | 1.00 | 1 | 0.48 | 25 | 12.00 | |
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) | | |
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