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Individual Calculations September 2011 |
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| Ostrovskiy, Aleksandr Total change: 13.50 | |   |
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| 39th Annual World Open - U2400 Section | Philadelphia, Pennsylvania | USA | 2011-06-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2240 | 2267 | 3.00 | 4 | 0.87 | 15 | 13.05 | |
|  Schoch, Ian D | | | 2070 | USA | 1.00 | 1 | 0.25 | 15 | 3.75 | |  Perez, Robert M | | | 2239 | USA | 0.50 | 1 | -0.04 | 15 | -0.60 | | | Dominguez, Jose | m | | 2322 | DOM | 1.00 | 1 | 0.58 | 15 | 8.70 | | | Adamson, Robby | f | | 2328 | USA | 0.50 | 1 | 0.08 | 15 | 1.20 | |
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) | | | | 2011 US Cadet Chess Tournament | Crossville, Tennessee | USA | 2011-07-12 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2138 | 2294 | 4.00 | 7 | -0.95 | 15 | -14.25 | |
| | Brown, Michael W | | | 2121 | USA | 0.00 | 1 | -0.73 | 15 | -10.95 | | | Mo, Kevin | | | 2095 | USA | 1.00 | 1 | 0.24 | 15 | 3.60 | | | Bodek, Michael H | | | 2191 | USA | 0.50 | 1 | -0.14 | 15 | -2.10 | | | Cao, Kevin Y | | | 2131 | USA | 1.00 | 1 | 0.28 | 15 | 4.20 | | | Wang, Andrew C | | | 2158 | USA | 0.50 | 1 | -0.18 | 15 | -2.70 | | | Shetty, Atulya A | | | 2116 | USA | 0.50 | 1 | -0.23 | 15 | -3.45 | | | Shen, Arthur | f | | 2155 | USA | 0.50 | 1 | -0.19 | 15 | -2.85 | |
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) | | | | Curacao Chess Festival 2011 Rounds 1-9 | Willemstad | AHO | 2011-07-22 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2149 | 2294 | 6.50 | 9 | 0.35 | 15 | 5.25 | |
| | Zalm, Norman | | | 1894 * | AHO | 1.00 | 1 | 0.08 | 15 | 1.20 | | | Dekker, Marvin | | | 2084 | AHO | 1.00 | 1 | 0.23 | 15 | 3.45 | | | Matoewi, Roger | c | | 2150 | SUR | 1.00 | 1 | 0.31 | 15 | 4.65 | | | Kats, Alena | | | 2097 | USA | 0.50 | 1 | -0.25 | 15 | -3.75 | | | Van Wely, Loek | g | | 2683 | NED | 0.00 | 1 | -0.09 | 15 | -1.35 | | | Pesqueira, Jose | | | 1981 | ARU | 1.00 | 1 | 0.14 | 15 | 2.10 | | | Lopez, Jasel | c | | 2127 | ARU | 1.00 | 1 | 0.28 | 15 | 4.20 | | | Blijstra, Wim | | | 2239 | NED | 0.00 | 1 | -0.58 | 15 | -8.70 | | | Wagenaar, Harm Theo | | | 2084 | NED | 1.00 | 1 | 0.23 | 15 | 3.45 | | | * 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) | | | | 2011 Marshall August Grand Prix | New York, New York | USA | 2011-08-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2169 | 2294 | 1.00 | 2 | -0.33 | 15 | -4.95 | |
| | Repka, Christopher | | | 2133 | SVK | 1.00 | 1 | 0.29 | 15 | 4.35 | | | Treger, Yefim | | | 2205 | USA | 0.00 | 1 | -0.62 | 15 | -9.30 | |
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 |
| 2379 | 2294 | 4.50 | 9 | 0.96 | 15 | 14.40 | |
| | Kacheishvili, Giorgi | g | | 2582 | GEO | 1.00 | 1 | 0.84 | 15 | 12.60 | | | Kekelidze, Mikheil | g | | 2452 | GEO | 0.00 | 1 | -0.29 | 15 | -4.35 | | | Hughes, John Lodge | | | 2049 | USA | 1.00 | 1 | 0.20 | 15 | 3.00 | | | Kleiman, Jake | m | | 2375 | USA | 1.00 | 1 | 0.61 | 15 | 9.15 | | | Gelashvili, Tamaz | g | | 2616 | GEO | 0.00 | 1 | -0.13 | 15 | -1.95 | | | Ashley, Maurice A | g | | 2465 | USA | 0.00 | 1 | -0.27 | 15 | -4.05 | | | Wang, Kevin | | | 2192 | USA | 1.00 | 1 | 0.36 | 15 | 5.40 | | | Nagle, Sean M | f | | 2379 | USA | 0.00 | 1 | -0.38 | 15 | -5.70 | | | Zlotnikov, Mikhail | m | | 2305 | USA | 0.50 | 1 | 0.02 | 15 | 0.30 | |
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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