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Individual Calculations July 2009 |
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| Ivanov, Stojan Lubomirov Total change: 23.55 | |   |
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| Bulgarian individual chess championship boys 20 | Sofia | BUL | 2009-03-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2095 | 2129 | 5.00 | 7 | 1.21 | 15 | 18.15 | |
|  Janev, Tihomir | | | 2297 | BUL | 0.50 | 1 | 0.22 | 15 | 3.30 | |  Andreev, Sasho | | | 2063 | BUL | 0.50 | 1 | -0.09 | 15 | -1.35 | | | Kirov, Dimitar | | | 2116 | BUL | 0.50 | 1 | -0.02 | 15 | -0.30 | | | Dimitrov, Alexander | | | 1974 | BUL | 1.00 | 1 | 0.29 | 15 | 4.35 | | | Vlashki, Nino | | | 2200 | BUL | 1.00 | 1 | 0.60 | 15 | 9.00 | | | Petrov, Plamen | | | 1875 | BUL | 1.00 | 1 | 0.19 | 15 | 2.85 | | | Dobrev, Nayden | | | 2142 | BUL | 0.50 | 1 | 0.02 | 15 | 0.30 | |
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) | | | | Bulgarian Individual Championship for juniors 18 years old | Sunny Beach | BUL | 2009-03-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2017 | 2129 | 4.00 | 6 | 0.14 | 15 | 2.10 | |
| | Ivanov, Aleksandar | | | 1833 | BUL | 1.00 | 1 | 0.15 | 15 | 2.25 | | | Janev, Pavel | | | 1970 | BUL | 0.50 | 1 | -0.21 | 15 | -3.15 | | | Tiholov, Todor | | | 2056 | BUL | 0.00 | 1 | -0.60 | 15 | -9.00 | | | Iliev, Atanas | | | 1957 | BUL | 1.00 | 1 | 0.27 | 15 | 4.05 | | | Janev, Tihomir | | | 2297 | BUL | 0.50 | 1 | 0.22 | 15 | 3.30 | | | Angelov, Boyan | | | 1990 | BUL | 1.00 | 1 | 0.31 | 15 | 4.65 | |
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) | | | | 59th Team Ch (m) 2nd Division | Sunny Beach | BUL | 2009-06-08 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2077 | 2129 | 2.50 | 4 | 0.22 | 15 | 3.30 | |
| | Nestorova-Petrova, Lozanka | | | 2080 | BUL | 0.00 | 1 | -0.57 | 15 | -8.55 | | | Dimov, Kiril | | | 2183 | BUL | 1.00 | 1 | 0.58 | 15 | 8.70 | | | Kukov, Andrej | | | 2032 | BUL | 1.00 | 1 | 0.37 | 15 | 5.55 | | | Kolev, Atanas Tonchev | | | 2011 | BUL | 0.50 | 1 | -0.16 | 15 | -2.40 | |
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) | | |
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