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Individual Calculations September 2021 |
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| Liu, Patrick Peijun Total change: -14.80 | |   |
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| 26th Annual Pacific Coast Open - Under 2100 | Van Nuys, California | USA | 2021-07-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1685 | 1386 | 1.00 | 4 | 0.34 | 40 | 13.60 | |
|  Roberts, Vincent Henry | | | 1751 | USA | 0.00 | 1 | -0.10 | 40 | -4.00 | |  Andranigian, Armen | | | 1735 | USA | 0.00 | 1 | -0.11 | 40 | -4.40 | | | Molodyk, Mikhail Alexandrovic | | | 1766 | RUS | 0.00 | 1 | -0.09 | 40 | -3.60 | | | Ribaya, Adler Luis R | | | 1488 | USA | 1.00 | 1 | 0.64 | 40 | 25.60 | |
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) | | | | 2021 North American Youth Chess Championships - Open Under 10 | Chicago, Illinois | USA | 2021-08-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1415 | 1582 | 2.00 | 4 | -0.71 | 40 | -28.40 | |
| | Ho, Carter | | | 1582 | USA | 0.50 | 1 | 0.00 | 40 | 0.00 | | | Xu, Alan | | | 1182 * | USA | 1.00 | 1 | 0.08 | 40 | 3.20 | | | Qian, Bobby | | | 1246 | USA | 0.00 | 1 | -0.88 | 40 | -35.20 | | | Rajaram, Rohan | | | 1648 | USA | 0.50 | 1 | 0.09 | 40 | 3.60 | | | * 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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