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Individual Calculations January 2009 |
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| Duran Vega, Sergio Total change: -15.00 | |   |
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| America Central and Caribbean Regional Youth Champiomship U- 16 Male | San Salvador | ESA | 2008-08-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1906 | 1996 | 1.50 | 2 | 0.30 | 25 | 7.50 | |
|  Bassan Noriega, Remo | | | 2109 | VEN | 0.50 | 1 | 0.15 | 25 | 3.75 | | | Sanchez, Jose | | | 1703 | ESA | 1.00 | 1 | 0.15 | 25 | 3.75 | |
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) | | | | III Internacional Bolsa de Valores | Santa Ana | CRC | 2008-09-07 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2116 | 1996 | 0.00 | 2 | -0.67 | 25 | -16.75 | |
|  Alfaro, Carlos | | | 2113 | CRC | 0.00 | 1 | -0.34 | 25 | -8.50 | | | Solis, Efren | | | 2118 | CRC | 0.00 | 1 | -0.33 | 25 | -8.25 | |
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) | | | | Metropolitano 2008 | San Jose | CRC | 2008-12-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2065 | 1998 | 1.00 | 3 | -0.23 | 25 | -5.75 | |
| | Vargas Serano, Pablo | | | 1978 | CRC | 0.50 | 1 | -0.03 | 25 | -0.75 | | | Vives, David | | | 2097 | CRC | 0.00 | 1 | -0.36 | 25 | -9.00 | | | Castillo, Rommel | | | 2119 | NCA | 0.50 | 1 | 0.16 | 25 | 4.00 | |
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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