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Individual Calculations April 2009 |
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| Cherniack, Alex Total change: 8.40 | |   |
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| Bermuda International Open | hamilton | BER | 2009-01-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2309 | 2222 | 1.00 | 3 | -0.18 | 15 | -2.70 | |
|  Radford, Michael | | | 1887 | BER | 1.00 | 1 | 0.12 | 15 | 1.80 | |  Ivanov, Alexander | g | | 2541 | USA | 0.00 | 1 | -0.13 | 15 | -1.95 | | | Charbonneau, Pascal | g | | 2500 | CAN | 0.00 | 1 | -0.17 | 15 | -2.55 | |
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 |
| 2046 | 2222 | 2.50 | 3 | 0.32 | 15 | 4.80 | |
| | Guo, Gill Y | | | 2106 | USA | 1.00 | 1 | 0.34 | 15 | 5.10 | | | Antler, Arthur S | | | 2016 | USA | 1.00 | 1 | 0.24 | 15 | 3.60 | | | Patay, Travis J | | | 2017 | USA | 0.50 | 1 | -0.26 | 15 | -3.90 | |
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 Eastern Class Championships | Sturbridge, Massachusetts | USA | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2316 | 2222 | 2.00 | 4 | 0.42 | 15 | 6.30 | |
| | Kacheishvili, Giorgi | g | | 2572 | GEO | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Bird, Christopher | | | 2121 | USA | 1.00 | 1 | 0.36 | 15 | 5.40 | | | Esserman, Marc R | | | 2345 | USA | 0.00 | 1 | -0.33 | 15 | -4.95 | | | Parry, Matt J | | | 2225 | USA | 1.00 | 1 | 0.50 | 15 | 7.50 | |
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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