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Individual Calculations September 2017 |
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| Horlock, Peter J Total change: -33.20 | |   |
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| 104th British Championships Weekend Under 1825 | Llandudno | ENG | 2017-07-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1478 | 1622 | 1.50 | 3 | -0.48 | 20 | -9.60 | |
|  Clanchy, Nicholas | | | 1770 | ENG | 0.00 | 1 | -0.30 | 20 | -6.00 | | | Ashworth, Steven M | | | 1355 | ENG | 0.50 | 1 | -0.32 | 20 | -6.40 | | | Laurillard, Xavier | | | 1310 | ENG | 1.00 | 1 | 0.14 | 20 | 2.80 | |
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) | | | | 104th British Championships Under 2050 | Llandudno | ENG | 2017-07-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1691 | 1622 | 1.00 | 5 | -1.06 | 20 | -21.20 | |
| | Ramage, Colin R | | | 1836 | ENG | 0.00 | 1 | -0.23 | 20 | -4.60 | | | Jones, Neil T | | | 1788 | ENG | 0.00 | 1 | -0.28 | 20 | -5.60 | |  Ratnesan, Rajeiv | | | 1537 | ENG | 0.00 | 1 | -0.62 | 20 | -12.40 | | | Balouka Myers, Reuben | | | 1520 | ENG | 1.00 | 1 | 0.36 | 20 | 7.20 | | | Guha, Chirag | | | 1776 | WLS | 0.00 | 1 | -0.29 | 20 | -5.80 | |
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) | | | | 104th British Championships Under 1900 | Llandudno | ENG | 2017-07-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1795 | 1622 | 1.00 | 4 | -0.12 | 20 | -2.40 | |
| | Jazdzewski, Daniel | | | 1808 | POL | 0.00 | 1 | -0.26 | 20 | -5.20 | | | Emerton, Keith | | | 1778 | ENG | 0.50 | 1 | 0.21 | 20 | 4.20 | | | Cresswell, Mike J | | | 1698 | ENG | 0.50 | 1 | 0.10 | 20 | 2.00 | | | Carlucci, Paul A | | | 1896 | ENG | 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) | | |
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