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Individual Calculations April 2023 |
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| James, Dai Total change: 1.80 | |   |
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| Welsh Spring Open 2023 | Cardiff | WLS | 2023-03-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1947 | 1843 | 2.00 | 4 | 0.51 | 20 | 10.20 | |
|  Gibiec, Mateusz | | | 1595 | WLS | 1.00 | 1 | 0.19 | 20 | 3.80 | |  Fathallah, Joe | | | 1988 | WLS | 1.00 | 1 | 0.69 | 20 | 13.80 | | | Bullen, Alex | c | | 2148 | WLS | 0.00 | 1 | -0.14 | 20 | -2.80 | | | Young, Alan | | | 2058 | WLS | 0.00 | 1 | -0.23 | 20 | -4.60 | |
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) | | | | Welsh Chess Premier League Major 2023 Round 2 | Bridgend | WLS | 2023-03-12 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1443 | 1843 | 0.50 | 1 | -0.42 | 20 | -8.40 | |
| | Smith, Callum A | | | 1443 * | WLS | 0.50 | 1 | -0.42 | 20 | -8.40 | | | * 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) | | |
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