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Individual Calculations October 2015 |
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| Petkov, Gabriel Total change: 17.60 | |   |
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| National team championship 2015 boys U12 | Golden sands | BUL | 2015-08-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1532 | 1318 | 1.50 | 5 | 0.21 | 40 | 8.40 | |
|  Mitev, Valentin | | | 1718 * | BUL | 0.00 | 1 | -0.08 | 40 | -3.20 | |  Todev, Simeon | | | 1195 | BUL | 0.50 | 1 | -0.17 | 40 | -6.80 | | | Kulev, Atanas | | | 1559 | BUL | 1.00 | 1 | 0.80 | 40 | 32.00 | | | Kirilov, Ivaylo | | | 1632 | BUL | 0.00 | 1 | -0.14 | 40 | -5.60 | | | Portokalski, Yordan | | | 1556 | BUL | 0.00 | 1 | -0.20 | 40 | -8.00 | | | * 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) | | | | 62nd Slavia open | Sofia | BUL | 2015-09-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1475 | 1301 | 1.50 | 4 | 0.19 | 40 | 7.60 | |
| | Krasteva, Beloslava | | | 1701 * | BUL | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Nikolov, Savko | | | 1701 * | BUL | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Klaklov, Adrian | | | 1199 | BUL | 1.00 | 1 | 0.36 | 40 | 14.40 | | | Ma, Ichen | | | 1297 | BUL | 0.50 | 1 | -0.01 | 40 | -0.40 | | | * 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) | | | | 150th MGU open | Sofia | BUL | 2015-09-19 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1546 | 1301 | 1.00 | 4 | 0.04 | 40 | 1.60 | |
| | Cholakov, Nikolay | | | 1701 * | BUL | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Grabcheva, Natalia | | | 1701 * | BUL | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Sapareva, Magdalena | | | 1567 | BUL | 0.00 | 1 | -0.18 | 40 | -7.20 | | | Simonska, Gergana | | | 1216 | BUL | 1.00 | 1 | 0.38 | 40 | 15.20 | | | * 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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