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Individual Calculations April 2009 |
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| Finney, Stuart S Total change: 13.40 | |   |
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| 4th Annual Empire State Open | Saratoga Springs, New York | USA | 2008-12-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2029 | 1883 | 0.00 | 2 | -0.61 | 25 | -15.25 | |
|  Swaminathan, Rahul K | | | 1998 | USA | 0.00 | 1 | -0.34 | 25 | -8.50 | | | Pinkerton, James C | | | 2059 | USA | 0.00 | 1 | -0.27 | 25 | -6.75 | |
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) | | | | 41st Annual Liberty Bell Open | Philadelphia, Pennsylvania | USA | 2009-01-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2127 | 1926 | 2.50 | 6 | 0.96 | 25 | 24.00 | |
| | Chiang, Michael | | | 1942 | USA | 1.00 | 1 | 0.52 | 25 | 13.00 | |  Melekhina, Alisa | | wm | 2276 | USA | 0.00 | 1 | -0.11 | 25 | -2.75 | | | Ng, Andrew | | | 2127 | USA | 1.00 | 1 | 0.76 | 25 | 19.00 | | | Hilton, Jonathan L | | | 2194 | USA | 0.00 | 1 | -0.17 | 25 | -4.25 | | | Fayvinov, Zakhar | f | | 2181 | USA | 0.00 | 1 | -0.19 | 25 | -4.75 | | | Hellenschmidt, Andrew | | | 2039 | USA | 0.50 | 1 | 0.15 | 25 | 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 | | 39th Annual World Amateur Team & US Team East | Parsippany, New Jersey | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2202 | 1926 | 0.00 | 2 | -0.35 | 15 | -5.25 | |
| | Ng, Andrew | | | 2127 | USA | 0.00 | 1 | -0.24 | 15 | -3.60 | | | Zaremba, Andrei A | f | | 2276 | USA | 0.00 | 1 | -0.11 | 15 | -1.65 | |
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 | | 18th Annual Eastern Class Championships | Sturbridge, Massachusetts | USA | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2112 | 1926 | 1.50 | 3 | 0.66 | 15 | 9.90 | |
| | Kaufman, Raymond | m | | 2276 | USA | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Christiansen, Natasha | | wc | 1939 | USA | 0.50 | 1 | 0.02 | 15 | 0.30 | | | Bird, Christopher | | | 2121 | USA | 1.00 | 1 | 0.75 | 15 | 11.25 | |
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) | | |
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