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Individual Calculations April 2009 |
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| Duran Vega, Sergio Total change: 73.90 | |   |
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| I Internacional Cartago Las Brumas | Cartago | CRC | 2009-01-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2152 | 1983 | 4.00 | 6 | 2.20 | 25 | 55.00 | |
|  Trejos, Enrique | | | 2157 | CRC | 0.50 | 1 | 0.23 | 25 | 5.75 | |  Arroyo, Luis | | | 2008 | CRC | 1.00 | 1 | 0.53 | 25 | 13.25 | | | Murillo, Alexis | m | | 2322 | CRC | 1.00 | 1 | 0.88 | 25 | 22.00 | | | Urbina Quiros, Edwin | | | 2080 | CRC | 0.00 | 1 | -0.37 | 25 | -9.25 | | | Montenegro, Esteban | | | 2013 | CRC | 1.00 | 1 | 0.54 | 25 | 13.50 | | | Valdes, Leonardo | m | | 2333 | CRC | 0.50 | 1 | 0.39 | 25 | 9.75 | |
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) | | | NOTE: K factor changed | | Costa Rican Junior Championship 2009 | Cartago | CRC | 2009-01-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2027 | 1983 | 1.50 | 5 | -0.70 | 15 | -10.50 | |
| | Munoz, Jose Pablo | | | 2078 | CRC | 0.50 | 1 | 0.13 | 15 | 1.95 | | | Urbina Quiros, Edwin | | | 2080 | CRC | 0.50 | 1 | 0.13 | 15 | 1.95 | | | Cabrera, Marco Antonio | | | 2109 | CRC | 0.00 | 1 | -0.33 | 15 | -4.95 | | | Alfaro Guillen, Jose Raul | | | 1892 | CRC | 0.00 | 1 | -0.62 | 15 | -9.30 | | | Duran Vega, Andres | | | 1975 | CRC | 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) | | | NOTE: K factor changed | | Costa Rican National Championship Phase 1.1 | San Jose | CRC | 2009-01-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2021 | 1983 | 6.00 | 9 | 1.96 | 15 | 29.40 | |
| | Centeno Mora, Erick | | | 2043 | CRC | 1.00 | 1 | 0.58 | 15 | 8.70 | | | Jimenez, Alvarado Alonso | | | 1960 | CRC | 0.00 | 1 | -0.53 | 15 | -7.95 | | | Vargas Serano, Pablo | | | 1983 | CRC | 1.00 | 1 | 0.50 | 15 | 7.50 | | | Solis, Efren | | | 2128 | CRC | 0.50 | 1 | 0.19 | 15 | 2.85 | | | Hernandez Coto, Carlos | | | 2028 | CRC | 1.00 | 1 | 0.56 | 15 | 8.40 | | | Solano Lopaz, Royner | | | 2083 | CRC | 0.50 | 1 | 0.14 | 15 | 2.10 | | | Alvarez Hernandez, David | | | 1962 | CRC | 1.00 | 1 | 0.47 | 15 | 7.05 | | | Cabrera, Marco Antonio | | | 2109 | CRC | 0.00 | 1 | -0.33 | 15 | -4.95 | | | Alfaro Guillen, Jose Raul | | | 1892 | CRC | 1.00 | 1 | 0.38 | 15 | 5.70 | |
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) | | |
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