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Individual Calculations November 2009 |
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| Gurczak, John Total change: -38.50 | |   |
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| 31st Annual Southern California Open | San Diego, California | USA | 2009-09-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2129 | 2086 | 1.50 | 4 | -0.38 | 25 | -9.50 | |
|  Khachiyan, Melikset | g | | 2486 * | USA | 0.00 | 1 | -0.08 | 25 | -2.00 | |  Sobel, Simone | | | 1951 | USA | 1.00 | 1 | 0.32 | 25 | 8.00 | | | Ebenezer, Joseph | | | 2152 | IND | 0.00 | 1 | -0.41 | 25 | -10.25 | | | Fries, Thomas M | | | 1928 | USA | 0.50 | 1 | -0.21 | 25 | -5.25 | | | * 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) | | | | 18th Annual Midwest Class Champinships | Wheeling, Illinois | USA | 2009-10-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2149 | 2086 | 0.50 | 4 | -1.16 | 25 | -29.00 | |
| | Chow, Albert C | f | | 2254 | USA | 0.00 | 1 | -0.28 | 25 | -7.00 | | | Iwu, Okechukwu A | | | 2202 | USA | 0.50 | 1 | 0.16 | 25 | 4.00 | | | Magness, Trevor S | | | 2108 | USA | 0.00 | 1 | -0.47 | 25 | -11.75 | | | Shetty, Atulya A | | | 2033 | USA | 0.00 | 1 | -0.57 | 25 | -14.25 | |
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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