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Individual Calculations December 2012 |
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| Helfst, Matt D Total change: -16.65 | |   |
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| 3rd Annual Continental Class Championships - Open Section | Arlington, Virginia | USA | 2012-10-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2055 | 1965 | 1.50 | 7 | -1.28 | 15 | -19.20 | |
|  Perez, Robert M | | | 2355 | USA | 0.00 | 1 | -0.09 | 15 | -1.35 | |  Song, Michael | | | 2177 | CAN | 0.00 | 1 | -0.23 | 15 | -3.45 | | | Chandran, Kapil | | | 2096 | USA | 0.00 | 1 | -0.32 | 15 | -4.80 | | | Yagiz, Bora | | | 1893 | TUR | 0.00 | 1 | -0.60 | 15 | -9.00 | | | De Fotis, Gary C | | | 2028 | USA | 0.50 | 1 | 0.09 | 15 | 1.35 | | | Harmon-Vellotti, Carl Honor | | | 1849 | USA | 0.50 | 1 | -0.16 | 15 | -2.40 | | | Beilin, Allan | | | 1989 | USA | 0.50 | 1 | 0.03 | 15 | 0.45 | |
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) | | | | Bahamas International and Amateur | Nassau, Bahamas | USA | 2012-10-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2262 | 1965 | 0.50 | 4 | -0.12 | 15 | -1.80 | |
| | Norowitz, Yaacov | | | 2365 * | USA | 0.00 | 1 | -0.08 | 15 | -1.20 | | | Mascarenhas, Alberto Pinheiro | f | | 2236 | BRA | 0.50 | 1 | 0.33 | 15 | 4.95 | | | Carreto, Giovanni | c | | 2247 | MEX | 0.00 | 1 | -0.16 | 15 | -2.40 | | | Selzler, Richard | | | 2200 | USA | 0.00 | 1 | -0.21 | 15 | -3.15 | | | * 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) | | | | 43rd Annual National Chess Congress | Philadelphia, Pennsylvania | USA | 2012-11-23 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2159 | 1950 | 1.50 | 5 | 0.29 | 15 | 4.35 | |
| | Melekhina, Alisa | f | wm | 2236 | USA | 0.50 | 1 | 0.34 | 15 | 5.10 | | | Bryant, Todd | | | 2069 | USA | 0.50 | 1 | 0.16 | 15 | 2.40 | | | Defibaugh, Jared E | | | 2270 | USA | 0.00 | 1 | -0.13 | 15 | -1.95 | | | Giannatos, Peter Lukas | | | 2085 | USA | 0.00 | 1 | -0.32 | 15 | -4.80 | | | Hill Jr, Leroy | | | 2137 | USA | 0.50 | 1 | 0.24 | 15 | 3.60 | |
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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