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Individual Calculations September 2017 |
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| Tidmarsh, David A Total change: -2.80 | |   |
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| 104th British Championships Over 65 | Llandudno | ENG | 2017-07-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1930 | 1821 | 2.00 | 6 | -0.14 | 20 | -2.80 | |
|  Tunstall, Mike J | | | 2030 | ENG | 0.50 | 1 | 0.27 | 20 | 5.40 | |  Hutchinson, Norman A | | | 2040 | ENG | 0.00 | 1 | -0.22 | 20 | -4.40 | | | Collins, Peter M | | | 1954 | ENG | 0.50 | 1 | 0.18 | 20 | 3.60 | | | Lawson, Maurice E | | | 1947 | ENG | 0.00 | 1 | -0.33 | 20 | -6.60 | | | Donaghay, Richard H | | | 1856 | ENG | 0.00 | 1 | -0.45 | 20 | -9.00 | | | Ribbands, Patrick C | | | 1755 | ENG | 1.00 | 1 | 0.41 | 20 | 8.20 | |
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) | | |
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