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Individual Calculations July 2008 |
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| De Silva, Osheen Total change: 61.90 | |   |
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| Sri Lanka Open Chess Championship | Polgolla, Kandy | SRI | 2008-03-19 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2097 | 1936 | 2.50 | 4 | 1.31 | 25 | 32.75 | |
|  Mallawarachchi, T S | | | 2229 | SRI | 0.50 | 1 | 0.35 | 25 | 8.75 | | | Fernando, J M M P | | | 2027 | SRI | 1.00 | 1 | 0.62 | 25 | 15.50 | |  Kalugampitiya, R S | | | 2114 | SRI | 0.00 | 1 | -0.27 | 25 | -6.75 | | | Prasad, D | | | 2018 | IND | 1.00 | 1 | 0.61 | 25 | 15.25 | |
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) | | | | Sri Lanka National B Chess Championship 2008 | Colombo | SRI | 2008-04-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2041 | 1960 | 5.00 | 9 | 1.43 | 25 | 35.75 | |
| | Kurukulasuriya, Prasanna | | | 2036 | SRI | 0.00 | 1 | -0.40 | 25 | -10.00 | | | Egodage, Thilina | | | 1831 | SRI | 1.00 | 1 | 0.33 | 25 | 8.25 | | | Rajapakse, Chathura | | | 2111 | SRI | 0.00 | 1 | -0.30 | 25 | -7.50 | | | Kuruppu, Danuke | | | 2069 | SRI | 1.00 | 1 | 0.65 | 25 | 16.25 | | | Dissanayake, Prasanga | | | 2144 | SRI | 1.00 | 1 | 0.74 | 25 | 18.50 | | | Madugalle, Y.d.b. | | | 1991 | SRI | 1.00 | 1 | 0.54 | 25 | 13.50 | | | Weerawardane, Romesh | | | 2121 | SRI | 0.00 | 1 | -0.29 | 25 | -7.25 | | | Mallawarachchi, T.s. | | | 2221 | SRI | 0.00 | 1 | -0.18 | 25 | -4.50 | | | Kavikeshawa, Pasan | | | 1844 | SRI | 1.00 | 1 | 0.34 | 25 | 8.50 | |
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) | | | NOTE: K factor changed | | Sri Lanka National A Chess Championship 2008 | Kandy | SRI | 2008-05-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2084 | 1960 | 4.00 | 13 | -0.44 | 15 | -6.60 | |
| | Rajapakse, R.m.c.m. | | | 2111 | SRI | 1.00 | 1 | 0.70 | 15 | 10.50 | | | Pieris, T.d.r. | | | 2141 | SRI | 0.50 | 1 | 0.24 | 15 | 3.60 | | | Bandara, P.m.r.l. | | | 1895 | SRI | 0.00 | 1 | -0.59 | 15 | -8.85 | | | Weerawardane, R. | | | 2121 | SRI | 0.00 | 1 | -0.29 | 15 | -4.35 | | | Madugalle, Y.d.b. | | | 1991 | SRI | 0.00 | 1 | -0.46 | 15 | -6.90 | | | Mallawarachchi, T.s. | | | 2221 | SRI | 0.50 | 1 | 0.32 | 15 | 4.80 | | | Fonseka, C.k.d. | | | 2050 | SRI | 0.00 | 1 | -0.38 | 15 | -5.70 | | | Kavinda, Akhila | | | 1988 | SRI | 1.00 | 1 | 0.54 | 15 | 8.10 | | | Russell, M.k.a. | | | 2205 | SRI | 0.50 | 1 | 0.30 | 15 | 4.50 | | | Peiris, T.g.m. | | | 2027 | SRI | 0.00 | 1 | -0.41 | 15 | -6.15 | | | Kurukulasuriya, Prasanna | | | 2036 | SRI | 0.50 | 1 | 0.10 | 15 | 1.50 | | | Annurudha, G.c. | | | 2222 | SRI | 0.00 | 1 | -0.18 | 15 | -2.70 | | | Wijesuriya, G. Luxman | | | 2084 | SRI | 0.00 | 1 | -0.33 | 15 | -4.95 | |
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) | | |
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