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Individual Calculations September 2011 |
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| Pressman, Leif A Total change: 3.90 | |   |
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| 2011 Marshall June Grand Prix | New York, New York | USA | 2011-06-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2173 | 2230 | 3.50 | 4 | 1.19 | 15 | 17.85 | |
|  Berg, George P | | | 2047 | USA | 0.50 | 1 | -0.24 | 15 | -3.60 | |  Rosenberg, Evan S | | | 2219 | USA | 1.00 | 1 | 0.48 | 15 | 7.20 | | | Thaler, Michael | | | 2244 | USA | 1.00 | 1 | 0.52 | 15 | 7.80 | | | Treger, Yefim | | | 2181 | USA | 1.00 | 1 | 0.43 | 15 | 6.45 | |
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) | | | | 39th Annual World Open - U2400 Section | Philadelphia, Pennsylvania | USA | 2011-06-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2196 | 2230 | 6.50 | 9 | 1.58 | 15 | 23.70 | |
| | Vertkin, Sergey | | | 2175 | RUS | 1.00 | 1 | 0.42 | 15 | 6.30 | | | Ng, Andrew | | | 2138 | USA | 0.50 | 1 | -0.13 | 15 | -1.95 | | | Iwu, Okechukwu A | | | 2158 | USA | 0.50 | 1 | -0.10 | 15 | -1.50 | | | Mo, Kevin | | | 2065 | USA | 1.00 | 1 | 0.28 | 15 | 4.20 | | | Cherniack, Alex | | | 2249 | USA | 0.00 | 1 | -0.47 | 15 | -7.05 | | | Bick, John D | f | | 2237 | USA | 1.00 | 1 | 0.51 | 15 | 7.65 | | | Carreto, Giovanni | c | | 2243 | MEX | 1.00 | 1 | 0.52 | 15 | 7.80 | | | Kleinman, Michael | | | 2195 | CAN | 0.50 | 1 | -0.05 | 15 | -0.75 | | | Ardaman, Miles F | f | | 2301 | USA | 1.00 | 1 | 0.60 | 15 | 9.00 | |
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) | | | | 2011 Marshall July Grand Prix | New York, New York | USA | 2011-07-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2031 | 2280 | 2.50 | 4 | -0.73 | 15 | -10.95 | |
| | Matlin, Anna R | | | 1963 | USA | 1.00 | 1 | 0.13 | 15 | 1.95 | | | Polyakin, Vladimir | | | 2084 | USA | 1.00 | 1 | 0.25 | 15 | 3.75 | | | Finneran, Michael | | | 2023 | USA | 0.50 | 1 | -0.32 | 15 | -4.80 | | | Moon, Kyle | | | 2054 | USA | 0.00 | 1 | -0.79 | 15 | -11.85 | |
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) | | | | 2011 Manhattan Open - Open Section | New York, New York | USA | 2011-08-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2261 | 2280 | 2.50 | 8 | -1.78 | 15 | -26.70 | |
| | Benjamin, Joel | g | | 2553 | USA | 0.00 | 1 | -0.17 | 15 | -2.55 | | | Lawson, Brian | | | 2083 | USA | 1.00 | 1 | 0.25 | 15 | 3.75 | | | Gelashvili, Tamaz | g | | 2616 | GEO | 0.00 | 1 | -0.12 | 15 | -1.80 | | | Prilleltensky, Matan | | | 2090 | USA | 1.00 | 1 | 0.25 | 15 | 3.75 | | | Garcia, Gildardo J | g | | 2368 | COL | 0.00 | 1 | -0.38 | 15 | -5.70 | | | Berube, Richard | f | | 2186 | CAN | 0.00 | 1 | -0.63 | 15 | -9.45 | | | Hughes, John Lodge | | | 2049 | USA | 0.50 | 1 | -0.29 | 15 | -4.35 | | | Schut, Han | | | 2142 | NED | 0.00 | 1 | -0.69 | 15 | -10.35 | |
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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