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Individual Calculations September 2012 |
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| Nelson, William Total change: -33.15 | |   |
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| South African Open Chess Championships 2012 | Cape Town | RSA | 2012-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1865 | 2067 | 0.00 | 1 | -0.76 | 15 | -11.40 | |
|  Chettiar, Evasan | | | 1865 | RSA | 0.00 | 1 | -0.76 | 15 | -11.40 | |
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) | | | | Gauteng North Closed 2012 | Pretoria | RSA | 2012-08-08 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1971 | 2073 | 3.00 | 7 | -1.45 | 15 | -21.75 | |
| | Meintjes, Jacques C | | | 2016 | RSA | 0.00 | 1 | -0.58 | 15 | -8.70 | |  Nene, Themba | | | 1986 | RSA | 1.00 | 1 | 0.38 | 15 | 5.70 | | | Wilken, Justin | | | 2003 | RSA | 0.50 | 1 | -0.10 | 15 | -1.50 | | | Hoek, Cornelis | | | 1816 | RSA | 0.50 | 1 | -0.32 | 15 | -4.80 | | | Mendelsohn, David C | | | 1950 | RSA | 0.00 | 1 | -0.67 | 15 | -10.05 | | | Goosen, Anton | c | | 2093 | RSA | 0.50 | 1 | 0.03 | 15 | 0.45 | | | Ponelis, Albert A | | | 1933 | RSA | 0.50 | 1 | -0.19 | 15 | -2.85 | |
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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