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Individual Calculations July 2009 |
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| Harmon-Vellotti, Luke Total change: 5.95 | |   |
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| 9th Annual Sands Regency Reno - Far West Open | Reno, Nevada | USA | 2009-04-10 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2131 | 2011 | 1.50 | 5 | -0.26 | 25 | -6.50 | |
|  Odondoo, Ganbold | m | | 2345 | MGL | 0.00 | 1 | -0.12 | 25 | -3.00 | |  Rupel, David G | | | 2107 | USA | 0.00 | 1 | -0.37 | 25 | -9.25 | | | Haring, Ruth Inez | | wm | 2010 | USA | 1.00 | 1 | 0.50 | 25 | 12.50 | | | Fuentes, Romulo C | | | 2113 | USA | 0.00 | 1 | -0.36 | 25 | -9.00 | | | Snyder, Larry | | | 2078 | USA | 0.50 | 1 | 0.09 | 25 | 2.25 | |
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) | | | NOTE: K factor changed | | 2009 Washington Open | Spokane, Washington | USA | 2009-05-23 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2256 | 2011 | 1.00 | 3 | 0.39 | 15 | 5.85 | |
| | Donaldson, John | m | | 2361 | USA | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Bartron, Paul | f | | 2206 | USA | 1.00 | 1 | 0.75 | 15 | 11.25 | | | Davis, Loal | | | 2201 | USA | 0.00 | 1 | -0.25 | 15 | -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) | | | NOTE: K factor changed | | The Copper State International | Mesa, Arizona | USA | 2009-05-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2211 | 2011 | 1.50 | 9 | -0.74 | 15 | -11.10 | |
| | Esserman, Marc R | | | 2361 | USA | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Adelberg, David | | | 2158 | USA | 0.00 | 1 | -0.30 | 15 | -4.50 | | | Hortillosa, Andres | | | 2143 | USA | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Cardona, Liulia | | wf | 2226 | CUB | 0.00 | 1 | -0.23 | 15 | -3.45 | | | Ding, Richard | | | 2134 | USA | 0.50 | 1 | 0.17 | 15 | 2.55 | | | Ristovic, Nenad | f | | 2252 | CAN | 0.00 | 1 | -0.20 | 15 | -3.00 | | | Mueller, Jason L | | | 2174 | USA | 0.50 | 1 | 0.22 | 15 | 3.30 | | | Atoufi, Pedram | f | | 2306 | IRI | 0.00 | 1 | -0.15 | 15 | -2.25 | | | Mackinnon, Keith | | | 2145 | CAN | 0.00 | 1 | -0.32 | 15 | -4.80 | |
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 | | 2009 National Open | Las Vegas, Nevada | USA | 2009-06-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2209 | 2011 | 2.50 | 5 | 1.18 | 15 | 17.70 | |
| | Bournival, Braden | f | | 2294 | USA | 0.50 | 1 | 0.34 | 15 | 5.10 | | | Pruess, David | m | | 2361 | USA | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Heung, Christopher | | | 1985 | USA | 0.00 | 1 | -0.54 | 15 | -8.10 | | | Serpik, Ilia | | | 2226 | USA | 1.00 | 1 | 0.77 | 15 | 11.55 | | | Zepeda, Lorena M | | wm | 2179 | ESA | 1.00 | 1 | 0.72 | 15 | 10.80 | |
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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