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Individual Calculations April 2018 |
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| Walder, Michael Total change: 10.20 | |   |
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| Winter 2018 Tuesday Night Marathon | San Francisco, California | USA | 2018-01-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1736 | 1976 | 5.00 | 8 | -1.26 | 20 | -25.20 | |
|  Robertson, Terrance | | | 1576 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | |  Cortinas, Martin | | | 1612 | USA | 0.00 | 1 | -0.90 | 20 | -18.00 | | | Nyangar, Enkhmaa | | | 1718 | USA | 1.00 | 1 | 0.18 | 20 | 3.60 | | | Cendejas, Juan | | | 1670 | USA | 1.00 | 1 | 0.14 | 20 | 2.80 | | | McKellar, Daniel | | | 1747 | USA | 0.50 | 1 | -0.29 | 20 | -5.80 | | | Yanofsky, Kevin | | | 1764 | USA | 1.00 | 1 | 0.23 | 20 | 4.60 | | | Kuczek, Kevin | | | 1900 | USA | 0.00 | 1 | -0.60 | 20 | -12.00 | | | Krasnov, Steven | | | 1903 | USA | 0.50 | 1 | -0.10 | 20 | -2.00 | | | * 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) | | | | 2018 IM John Grefe Marathon | Berkeley, California | USA | 2018-01-12 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1926 | 1976 | 5.00 | 7 | 1.15 | 20 | 23.00 | |
| | Cortinas, Martin | | | 1612 | USA | 1.00 | 1 | 0.10 | 20 | 2.00 | | | Oconnor, Derek | | | 2181 | USA | 0.00 | 1 | -0.24 | 20 | -4.80 | | | Lesquillier, Walter | | | 1669 | USA | 1.00 | 1 | 0.14 | 20 | 2.80 | | | Paetz, Mark | | | 1672 | USA | 0.50 | 1 | -0.36 | 20 | -7.20 | | | Maser, Thomas | | | 1917 | USA | 1.00 | 1 | 0.42 | 20 | 8.40 | | | Poehlmann, Roger | | | 2189 | USA | 1.00 | 1 | 0.77 | 20 | 15.40 | | | Winslow, Elliott | m | | 2243 | USA | 0.50 | 1 | 0.32 | 20 | 6.40 | |
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) | | | | Cal Chess Senior State Championship | Berkeley, California | USA | 2018-03-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1897 | 1961 | 3.00 | 4 | 0.62 | 20 | 12.40 | |
| | Cortinas, Martin | | | 1612 | USA | 1.00 | 1 | 0.11 | 20 | 2.20 | | | Alazawi, Samir | | | 1810 | USA | 1.00 | 1 | 0.30 | 20 | 6.00 | | | Ho, Michael | | | 1805 | USA | 1.00 | 1 | 0.29 | 20 | 5.80 | | | McCambridge, Vincent | m | | 2361 * | USA | 0.00 | 1 | -0.08 | 20 | -1.60 | | | * 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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