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Individual Calculations September 2021 |
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| Li, Eric Yuhan Total change: 31.40 | |   |
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| 2021 North American Youth Chess Championships - Open Under 18 | Chicago, Illinois | USA | 2021-08-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2139 | 2266 | 5.00 | 8 | -0.05 | 20 | -1.00 | |
|  Shah, Kai Mahesh | | | 1866 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Shen, Christopher | f | | 2346 | USA | 0.50 | 1 | 0.11 | 20 | 2.20 | |  Narayanan, Samrug | c | | 2245 | USA | 0.50 | 1 | -0.03 | 20 | -0.60 | | | Tsay, Vincent | f | | 2315 | USA | 0.00 | 1 | -0.43 | 20 | -8.60 | | | Chen, Justin | f | | 2275 | USA | 0.00 | 1 | -0.49 | 20 | -9.80 | | | Klein, Jack | | | 1918 | USA | 1.00 | 1 | 0.11 | 20 | 2.20 | | | Platnick, Elijah Samuel | | | 1866 * | USA | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Peng, Shunkai | f | | 2281 | USA | 1.00 | 1 | 0.52 | 20 | 10.40 | | | * 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) | | | | PNWCC FIDE Hybrid Match - PNWCC (USA) vs Bulgaria | Redmond, San Francisco (USA) and Plovdiv, Sofia (BUL) | USA | 2021-08-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2378 | 2266 | 3.00 | 4 | 1.62 | 20 | 32.40 | |
| | Zahariev, Zahari | m | | 2376 | BUL | 0.50 | 1 | 0.15 | 20 | 3.00 | | | Zahariev, Zahari | m | | 2376 | BUL | 1.00 | 1 | 0.65 | 20 | 13.00 | | | Pantev, Veselin | m | | 2380 | BUL | 0.50 | 1 | 0.16 | 20 | 3.20 | | | Pantev, Veselin | m | | 2380 | BUL | 1.00 | 1 | 0.66 | 20 | 13.20 | |
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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