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Individual Calculations January 2019 |
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| Nyathi, Musa Total change: 17.20 | |   |
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| 2018 African Schools Individual Chess Championships (U17 Boys) | Waterberg | RSA | 2018-12-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1711 | 1518 | 1.00 | 3 | 0.06 | 40 | 2.40 | |
|  Borges, Jose | | | 1918 * | ANG | 0.50 | 1 | 0.42 | 40 | 16.80 | | | Khumalo, Keith | | | 1918 * | RSA | 0.00 | 1 | -0.08 | 40 | -3.20 | |  Van Der Meer, Anthony | | | 1298 | NAM | 0.50 | 1 | -0.28 | 40 | -11.20 | | | * 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 South African Junion Chess Championships (u18A) | Boksburg | RSA | 2018-12-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1624 | 1518 | 2.00 | 6 | -0.32 | 40 | -12.80 | |
| | Millard, Chad | | | 1509 | RSA | 1.00 | 1 | 0.49 | 40 | 19.60 | | | Vester, Jordan | | | 1830 | RSA | 0.00 | 1 | -0.14 | 40 | -5.60 | | | Marais, Nina | | wc | 1626 | RSA | 0.00 | 1 | -0.35 | 40 | -14.00 | | | Du Plessis, Jan | | | 1377 | RSA | 1.00 | 1 | 0.31 | 40 | 12.40 | | | Fibiger, Jethro Nathanael | | | 1484 | RSA | 0.00 | 1 | -0.55 | 40 | -22.00 | | | Khumalo, Keith | | | 1918 * | RSA | 0.00 | 1 | -0.08 | 40 | -3.20 | | | * 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 Inter Region Chess Championships | Boksburg | RSA | 2018-12-21 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1646 | 1518 | 2.50 | 5 | 0.69 | 40 | 27.60 | |
| | Du Plessis, Heinco | | | 1918 * | RSA | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Amrouni, Gabrielle | | | 1198 | RSA | 1.00 | 1 | 0.13 | 40 | 5.20 | | | Naidoo, Tashil | | | 1529 | RSA | 0.50 | 1 | 0.02 | 40 | 0.80 | | | Moche, Johannes | | | 1668 | RSA | 1.00 | 1 | 0.70 | 40 | 28.00 | | | Mpya, Tshediso M | | | 1918 * | RSA | 0.00 | 1 | -0.08 | 40 | -3.20 | | | * 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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