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Individual Calculations January 2012 |
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| Arroyo, Luis Total change: -5.25 | |   |
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| Abierto Joaquin Gutierrez i.m. | San Jose | CRC | 2011-10-21 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2038 | 1937 | 1.00 | 4 | -0.48 | 15 | -7.20 | |
|  Carvajal Gorgona, Jonathan | | | 2177 | CRC | 0.00 | 1 | -0.20 | 15 | -3.00 | | | Alvarez Hernandez, David | | | 2004 | CRC | 0.50 | 1 | 0.09 | 15 | 1.35 | |  Angulo Cubero, Oscar | | | 2012 | CRC | 0.00 | 1 | -0.40 | 15 | -6.00 | | | Brenes, Juan Carlos | | | 1959 | CRC | 0.50 | 1 | 0.03 | 15 | 0.45 | |
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) | | | | Abierto Metropolitano | San Jose | CRC | 2011-12-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2031 | 1937 | 0.50 | 1 | 0.13 | 15 | 1.95 | |
| | Needham, Bryan | | | 2031 | CRC | 0.50 | 1 | 0.13 | 15 | 1.95 | |
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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