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Individual Calculations July 2009 |
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| Patterson, Roger Total change: -5.85 | |   |
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| British Columbia Closed Championship 2008 | Vancouver | CAN | 2008-10-10 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2219 | 2148 | 3.50 | 7 | 0.67 | 15 | 10.05 | |
|  Wu, Howard | | | 2207 | CAN | 0.50 | 1 | 0.08 | 15 | 1.20 | |  Pechisker, Alfred | | | 2163 | CAN | 0.50 | 1 | 0.02 | 15 | 0.30 | | | Jiganchine, Roman | | | 2217 | CAN | 1.00 | 1 | 0.60 | 15 | 9.00 | | | Mackay, Ian D | f | | 2326 | SCO | 0.00 | 1 | -0.27 | 15 | -4.05 | | | Davies, Lucas | | | 2170 | CAN | 0.50 | 1 | 0.03 | 15 | 0.45 | | | McLaren, Brian | | | 2222 | CAN | 0.50 | 1 | 0.10 | 15 | 1.50 | | | Berry, Jonathan | f | | 2229 | CAN | 0.50 | 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) | | | | 3rd Annual Grand Pacific Open | Victoria | CAN | 2009-04-10 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2044 | 2148 | 1.50 | 3 | -0.38 | 15 | -5.70 | |
| | Piasetski, Leon | m | | 2288 | CAN | 0.00 | 1 | -0.31 | 15 | -4.65 | | | Huang, Richard | | | 1869 | CAN | 1.00 | 1 | 0.16 | 15 | 2.40 | | | Cheng, Jack | | | 1975 | CAN | 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) | | | | 34th Keres Memorial | Vancouver | CAN | 2009-05-15 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2015 | 2148 | 2.00 | 4 | -0.68 | 15 | -10.20 | |
| | Huang, Richard | | | 1869 | CAN | 0.50 | 1 | -0.34 | 15 | -5.10 | | | Trochtchanovitch, Pavel | | | 2065 | CAN | 0.00 | 1 | -0.61 | 15 | -9.15 | | | Salcedo, Daniel E. | | | 2122 | CAN | 0.50 | 1 | -0.04 | 15 | -0.60 | | | Leblanc, Paul | | | 2005 | CAN | 1.00 | 1 | 0.31 | 15 | 4.65 | |
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) | | |
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