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Individual Calculations December 2018 |
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| Roebuck, Derek Total change: 9.60 | |   |
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| 2018 Marshall Amateur Championship and Jerry Simon Memorial | New York, New York | USA | 2018-11-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1796 | 1612 | 2.00 | 4 | 0.93 | 20 | 18.60 | |
|  Kraft, Paul | | | 1864 | USA | 1.00 | 1 | 0.81 | 20 | 16.20 | |  Stevenson, Nicholas | | | 1646 | USA | 0.50 | 1 | 0.05 | 20 | 1.00 | | | Liu, Bingjie | | | 1854 | USA | 0.00 | 1 | -0.20 | 20 | -4.00 | | | Boxer, Matthew | | | 1819 | USA | 0.50 | 1 | 0.27 | 20 | 5.40 | |
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) | | | | 67th Hampstead Weekend Congress Under 2200 | London | ENG | 2018-11-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1754 | 1612 | 0.50 | 3 | -0.45 | 20 | -9.00 | |
| | Lundback, Anders | | | 1852 | SWE | 0.50 | 1 | 0.30 | 20 | 6.00 | | | Jamroz, Viktor | | | 1758 | ENG | 0.00 | 1 | -0.30 | 20 | -6.00 | | | Papathanasopoulos, Nikolaos | | | 1651 | GRE | 0.00 | 1 | -0.45 | 20 | -9.00 | |
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) | | |
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