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Individual Calculations September 2023 |
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| Vale Cruz, Armin Total change: 78.80 | |   |
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| 2023 Calchess Senior Championship | Berkeley, Ca | USA | 2023-06-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1597 | 1526 | 2.00 | 3 | 0.58 | 20 | 11.60 | |
|  Winslow, Elliott | m | | 2025 | USA | 0.00 | 1 | -0.04 | 20 | -0.80 | |  Boyd, Thomas E | | | 1427 | USA | 1.00 | 1 | 0.36 | 20 | 7.20 | | | Soltani, Mohammad | | | 1339 | USA | 1.00 | 1 | 0.26 | 20 | 5.20 | |
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) | | | | July BAC Real Championship - AB | Milpitas, California | USA | 2023-07-15 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1498 | 1509 | 2.00 | 4 | -0.09 | 20 | -1.80 | |
| | Pan, Roger | | | 1360 | USA | 1.00 | 1 | 0.30 | 20 | 6.00 | | | Zhou, Celina | | | 1458 | USA | 0.00 | 1 | -0.57 | 20 | -11.40 | | | Gnana Hari Sekar, Easwar | | | 1396 | USA | 1.00 | 1 | 0.35 | 20 | 7.00 | | | Butenko, Zlata | | | 1777 | USA | 0.00 | 1 | -0.17 | 20 | -3.40 | |
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) | | | | 13th annual Central California Open - U2100 | Fresno, CA | USA | 2023-08-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1604 | 1509 | 4.00 | 5 | 2.05 | 20 | 41.00 | |
| | Fan, Allen Shenghan | | | 1368 | USA | 1.00 | 1 | 0.31 | 20 | 6.20 | | | Watson, Farid Mark | | | 1858 | USA | 0.50 | 1 | 0.39 | 20 | 7.80 | | | Gan, Nathan | | | 1508 | USA | 0.50 | 1 | 0.00 | 20 | 0.00 | | | Oza, Nikunj Chandrakant | | | 1598 | USA | 1.00 | 1 | 0.62 | 20 | 12.40 | | | Mohammed, Mansoor Taj | | | 1688 | USA | 1.00 | 1 | 0.73 | 20 | 14.60 | |
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) | | | | 1000GM 2023 August Bona FIDE Swiss - U2000 | Sunnyvale, CA | USA | 2023-08-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1591 | 1509 | 3.00 | 4 | 1.40 | 20 | 28.00 | |
| | Fang, Zelin | | | 1431 | USA | 1.00 | 1 | 0.39 | 20 | 7.80 | | | Butenko, Zlata | | | 1777 | USA | 1.00 | 1 | 0.83 | 20 | 16.60 | | | Pulijala, Akshaj | | | 1478 | USA | 0.50 | 1 | -0.04 | 20 | -0.80 | | | Tia, Rudy | | | 1676 | PNG | 0.50 | 1 | 0.22 | 20 | 4.40 | |
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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