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Individual Calculations November 2009 |
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| Williams, Peter A Total change: 50.85 | |   |
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| Coulsdon Chess Fellowship Open | Coulsdon | ENG | 2009-06-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2064 | 1905 | 2.50 | 7 | 0.36 | 15 | 5.40 | |
|  Gibbs, Dominic V | | | 2008 | ENG | 0.00 | 1 | -0.36 | 15 | -5.40 | | | Osborne, Marcus E | | | 2212 | ENG | 0.50 | 1 | 0.36 | 15 | 5.40 | |  Marchant, Geoffrey | | | 1861 | ENG | 1.00 | 1 | 0.44 | 15 | 6.60 | | | Salimbeni, George P W | | | 2099 | ENG | 0.00 | 1 | -0.25 | 15 | -3.75 | | | Lock, Gavin R | | | 2212 | ENG | 0.00 | 1 | -0.14 | 15 | -2.10 | | | Atako, Chino | | | 2111 | ENG | 0.00 | 1 | -0.24 | 15 | -3.60 | | | Cohen, Ronnie | | | 1943 | ENG | 1.00 | 1 | 0.55 | 15 | 8.25 | |
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) | | | | Coulsdon Autumn Open | Coulsdon | ENG | 2009-08-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2010 | 1961 | 3.00 | 4 | 1.25 | 15 | 18.75 | |
| | Sen, Subin | | | 2093 | ENG | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Daley, Eugene | | | 1736 | ENG | 1.00 | 1 | 0.22 | 15 | 3.30 | | | Ledger, Dave J | f | | 2225 | ENG | 0.50 | 1 | 0.32 | 15 | 4.80 | | | Hayward, Alan | | | 1985 | ENG | 1.00 | 1 | 0.53 | 15 | 7.95 | |
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) | | | | 45th Berks and Bucks Championships | Twyford | ENG | 2009-08-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2074 | 1961 | 2.00 | 5 | 0.25 | 15 | 3.75 | |
| | Roberts, David L | | | 2110 | ENG | 0.00 | 1 | -0.30 | 15 | -4.50 | | | Healey, Michael W | | | 2016 | ENG | 0.00 | 1 | -0.42 | 15 | -6.30 | | | McAllan, Ian | | | 2065 | ENG | 0.00 | 1 | -0.36 | 15 | -5.40 | | | Tunstall, George S | | | 2013 | ENG | 1.00 | 1 | 0.57 | 15 | 8.55 | | | Varnam, Liam D | | | 2167 | ENG | 1.00 | 1 | 0.76 | 15 | 11.40 | |
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) | | | | Uxbridge 2nd Congress | Denham | ENG | 2009-09-18 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2177 | 1961 | 2.50 | 4 | 1.53 | 15 | 22.95 | |
| | Hegarty, Sarah N | | | 2096 | ENG | 1.00 | 1 | 0.68 | 15 | 10.20 | | | Cox, John J | m | | 2361 * | ENG | 0.00 | 1 | -0.08 | 15 | -1.20 | | | Talbot, Andrew R | | | 2161 | ENG | 0.50 | 1 | 0.26 | 15 | 3.90 | | | Atako, Chino | | | 2088 | ENG | 1.00 | 1 | 0.67 | 15 | 10.05 | | | * 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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