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Individual Calculations January 2018 |
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| Oconnor, Derek Total change: -20.40 | |   |
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| 2017 Berkeley Club Championship | Berkeley, California | USA | 2017-10-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2007 | 2235 | 4.00 | 6 | -0.55 | 20 | -11.00 | |
|  Lesquillier, Walter | | | 1835 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | |  Maser, Thomas | | | 1951 | USA | 1.00 | 1 | 0.16 | 20 | 3.20 | | | Gaffagan, Steven | | | 2023 | USA | 0.50 | 1 | -0.27 | 20 | -5.40 | | | Winslow, Elliott | m | | 2214 | USA | 0.00 | 1 | -0.53 | 20 | -10.60 | | | Jensen, Christian | | | 1835 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Poehlmann, Roger | | | 2183 | USA | 0.50 | 1 | -0.07 | 20 | -1.40 | | | * 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) | | | | Fall 2017 Tuesday Night Marathon | San Francisco, California | USA | 2017-10-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1986 | 2235 | 6.50 | 9 | -0.47 | 20 | -9.40 | |
| | Campers Jr, Willie | | | 1835 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Poling, Scott | | | 1835 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Cheng, Alfonso | | | 1893 | USA | 0.00 | 1 | -0.88 | 20 | -17.60 | | | Anderson, Michael | | | 1835 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Rudyak, Felix | | | 1924 | USA | 1.00 | 1 | 0.14 | 20 | 2.80 | | | Whitehead, Paul | f | | 2315 | USA | 0.00 | 1 | -0.39 | 20 | -7.80 | | | Walder, Michael | | | 1984 | USA | 1.00 | 1 | 0.19 | 20 | 3.80 | | | Gaffagan, Steven | | | 2023 | USA | 1.00 | 1 | 0.23 | 20 | 4.60 | | | Diaz, Conrado | | | 2234 | PHI | 0.50 | 1 | 0.00 | 20 | 0.00 | | | * 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) | | |
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