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Individual Calculations September 2009 |
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| Sandberg, Evan Total change: -16.50 | |   |
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| Summer Tuesday Night Marathon | San Francisco, California | USA | 2009-05-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1937 | 2135 | 1.50 | 2 | 0.04 | 25 | 1.00 | |
|  Litowsky, Daniel | | | 1785 | USA | 1.00 | 1 | 0.11 | 25 | 2.75 | |  Manvelyan, Hayk | | | 2088 | USA | 0.50 | 1 | -0.07 | 25 | -1.75 | |
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) | | | | 14th Annual Pacific Coast Open | Agoura Hills, California | USA | 2009-07-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2289 | 2146 | 1.00 | 3 | -0.03 | 25 | -0.75 | |
| | Hermansen, Ron | | | 2222 | USA | 0.50 | 1 | 0.10 | 25 | 2.50 | | | Sevillano, Enrico | m | | 2528 | USA | 0.00 | 1 | -0.09 | 25 | -2.25 | | | Fuentes, Romulo C | | | 2116 | USA | 0.50 | 1 | -0.04 | 25 | -1.00 | |
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 | | 110th Annual US Open | Indianapolis, Indiana | USA | 2009-08-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2015 | 2146 | 3.00 | 5 | -0.35 | 15 | -5.25 | |
| | Johnson, Klaus R | | | 1904 | USA | 1.00 | 1 | 0.20 | 15 | 3.00 | | | Hughes, Devin L | | | 2052 | USA | 0.50 | 1 | -0.13 | 15 | -1.95 | | | Kleist, Frederick | | | 2122 | CAN | 1.00 | 1 | 0.47 | 15 | 7.05 | | | Moroney, Timothy M | | | 2014 | USA | 0.00 | 1 | -0.68 | 15 | -10.20 | | | Mayers, Dan E | | | 1984 | USA | 0.50 | 1 | -0.21 | 15 | -3.15 | |
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) | | | | Denker Tournament of High School Champions | Indianapolis, Indiana | USA | 2009-08-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2173 | 2146 | 0.00 | 1 | -0.46 | 25 | -11.50 | |
| | Lau, Robert | c | | 2173 | USA | 0.00 | 1 | -0.46 | 25 | -11.50 | |
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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