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Individual Calculations February 2018 |
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| Roberts, Rohan Total change: -14.00 | |   |
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| John Powell Memorial 2018 [Open] | Kingston, Jamaica | JAM | 2018-01-18 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1684 | 1738 | 2.00 | 4 | -0.35 | 40 | -14.00 | |
|  Brown, Raehanna | | | 1438 | JAM | 0.50 | 1 | -0.35 | 40 | -14.00 | |  Williams, Jordan | | | 1615 | JAM | 0.50 | 1 | -0.17 | 40 | -6.80 | | | Christie, Joshua | f | | 2133 | JAM | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Lyn, Nicholas | | | 1548 | JAM | 1.00 | 1 | 0.25 | 40 | 10.00 | |
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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