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Individual Calculations September 2017 |
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| Zhou, Iris Total change: 77.60 | |   |
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| 14th Annual SPF Girls' Invitational | Saint Louis, Missouri | USA | 2017-07-22 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1540 | 1570 | 3.00 | 5 | 0.29 | 40 | 11.60 | |
|  Vancsa, Veronika Lilla | | | 1480 | HUN | 1.00 | 1 | 0.38 | 40 | 15.20 | |  Ziljaeva, Veronika | | | 1738 | LAT | 0.00 | 1 | -0.28 | 40 | -11.20 | | | Miyasaka, Julia | | | 1599 | USA | 0.50 | 1 | 0.04 | 40 | 1.60 | | | Yellamraju, Ambica | | wc | 1478 | USA | 0.50 | 1 | -0.13 | 40 | -5.20 | | | Yellamraju, Aparna | | | 1407 | USA | 1.00 | 1 | 0.28 | 40 | 11.20 | |
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) | | | | 63rd Iowa Open Championship | Coralville, Iowa | USA | 2017-08-19 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1956 | 1570 | 2.00 | 4 | 1.65 | 40 | 66.00 | |
| | Holliman, Bob | | | 1915 | USA | 1.00 | 1 | 0.89 | 40 | 35.60 | | | Iwu, Okechukwu N | | | 1970 * | USA | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Mathur, Rithwik | | | 1970 * | USA | 1.00 | 1 | 0.92 | 40 | 36.80 | | | Kosokin, Valeriy | | | 1970 * | UZB | 0.00 | 1 | -0.08 | 40 | -3.20 | | | * 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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