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Individual Calculations April 2009 |
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| Ostrovskiy, Aleksander Total change: -9.90 | |   |
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| 35th Annual Eastern Open | Washington DC | USA | 2008-12-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2202 | 2112 | 2.00 | 5 | 0.08 | 15 | 1.20 | |
|  Ludwig, Daniel | | | 2400 | USA | 0.00 | 1 | -0.16 | 15 | -2.40 | |  Saperstein, Craig | | | 1854 | USA | 1.00 | 1 | 0.18 | 15 | 2.70 | | | Mabe, Chris J | | | 2248 | USA | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Getz, Alec | f | | 2222 | USA | 0.00 | 1 | -0.35 | 15 | -5.25 | | | Zimmer, Ralph P | f | | 2284 | USA | 0.50 | 1 | 0.23 | 15 | 3.45 | |
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) | | | | Happy New Year Open | New York, New York | USA | 2009-01-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2229 | 2071 | 0.50 | 2 | -0.12 | 15 | -1.80 | |
| | Bonin, Jay | m | | 2361 | USA | 0.00 | 1 | -0.16 | 15 | -2.40 | | | Fleischman, Eric J | | | 2097 | USA | 0.50 | 1 | 0.04 | 15 | 0.60 | |
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 Amateur Team & US Team East | Parsippany, New Jersey | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1981 | 2071 | 0.00 | 1 | -0.62 | 15 | -9.30 | |
| | Schoch, Ian David | | | 1981 | 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) | | |
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