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Individual Calculations September 2010 |
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| Helfst, Matt Total change: -9.15 | |   |
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| 4th Annual Philadelphia International | King of Prussia, Pennsylvania | USA | 2010-06-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2178 | 1884 | 1.00 | 7 | -0.12 | 15 | -1.80 | |
|  Perez, Robert M | | | 2212 | USA | 0.00 | 1 | -0.13 | 15 | -1.95 | | | Aliyev, Timur | | | 2218 | ISR | 0.00 | 1 | -0.12 | 15 | -1.80 | |  Baquero, Luis A | | | 2260 | COL | 0.00 | 1 | -0.09 | 15 | -1.35 | | | Melekhina, Alisa | | wm | 2265 | USA | 0.50 | 1 | 0.41 | 15 | 6.15 | | | Aripov, Iskandar | | | 2100 | UZB | 0.50 | 1 | 0.28 | 15 | 4.20 | | | Mackinnon, Keith | | | 2140 | CAN | 0.00 | 1 | -0.19 | 15 | -2.85 | | | Pinkerton, James C | | | 2054 | USA | 0.00 | 1 | -0.28 | 15 | -4.20 | |
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) | | | | 38th Annual World Open - Open Section | King of Prussia, Pennsylvania | USA | 2010-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2195 | 1884 | 0.50 | 7 | -0.53 | 15 | -7.95 | |
| | Bindrich, Falko | g | | 2284 * | GER | 0.00 | 1 | -0.08 | 15 | -1.20 | | | Baquero, Luis A | | | 2260 | COL | 0.00 | 1 | -0.09 | 15 | -1.35 | | | Pilgaard, Kim | m | | 2284 * | DEN | 0.00 | 1 | -0.08 | 15 | -1.20 | | | Shvartsman, Andrew | c | | 2192 | USA | 0.00 | 1 | -0.14 | 15 | -2.10 | | | Leve, Nitai D | | | 2117 | USA | 0.00 | 1 | -0.21 | 15 | -3.15 | | | Ryba, Nicholas | | | 2109 | USA | 0.50 | 1 | 0.28 | 15 | 4.20 | | | Sherman, David | | | 2117 | USA | 0.00 | 1 | -0.21 | 15 | -3.15 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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) | | | | 15th Annual Bradley Open | Windsor Locks, Connecticut | USA | 2010-07-23 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2127 | 1933 | 2.00 | 4 | 1.00 | 15 | 15.00 | |
| | Tuhrim, Richard J | | | 2101 | USA | 0.50 | 1 | 0.22 | 15 | 3.30 | | | Wu, Christopher | | | 2129 | USA | 0.00 | 1 | -0.25 | 15 | -3.75 | | | Clancy, Daniel J | | | 2140 | USA | 0.50 | 1 | 0.27 | 15 | 4.05 | | | Leach Iii, Daniel | | | 2139 | USA | 1.00 | 1 | 0.76 | 15 | 11.40 | |
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) | | | | 18th Annual Southern Open | Orlando, Florida | USA | 2010-07-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2176 | 1933 | 1.50 | 4 | 0.69 | 15 | 10.35 | |
| | Schoonmaker, Nicholas | c | | 2178 | USA | 1.00 | 1 | 0.80 | 15 | 12.00 | | | Barnett, Alexander | | | 2241 | USA | 0.00 | 1 | -0.14 | 15 | -2.10 | | | Daly, Troy | | | 2128 | USA | 0.00 | 1 | -0.25 | 15 | -3.75 | | | Hansen, Evgenia | | wm | 2157 | DEN | 0.50 | 1 | 0.28 | 15 | 4.20 | |
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) | | | | 111th Annual US Open - Jerry Hanken Memorial | Irvine, California | USA | 2010-07-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2081 | 1933 | 0.50 | 4 | -0.71 | 15 | -10.65 | |
| | Karas, Nicholas | | | 2084 | USA | 0.00 | 1 | -0.30 | 15 | -4.50 | | | Akopian, Robert | | | 2108 | USA | 0.00 | 1 | -0.27 | 15 | -4.05 | | | Lawrence, Danyul | | | 2064 | USA | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Williams, John M | | | 2068 | USA | 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) | | | | Indianapolis Open | Indianapolis, Indiana | USA | 2010-08-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2073 | 1933 | 0.00 | 3 | -0.94 | 15 | -14.10 | |
| | Markovits, Alex | | | 2102 | USA | 0.00 | 1 | -0.28 | 15 | -4.20 | | | Keating, Robert F | | | 2070 | USA | 0.00 | 1 | -0.32 | 15 | -4.80 | | | Fan, Yun | | wf | 2048 | USA | 0.00 | 1 | -0.34 | 15 | -5.10 | |
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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