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Individual Calculations September 2023 |
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| Truelson, Nels W Total change: -29.20 | |   |
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| 2023 Lake Superior Open | Superior, WI | USA | 2023-06-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2080 | 1990 | 0.50 | 1 | 0.12 | 20 | 2.40 | |
|  Wolchock, Theo | | | 2080 | CAN | 0.50 | 1 | 0.12 | 20 | 2.40 | |
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) | | | | 2023 U.S. Senior Open Championship | Elmhurst, IL | USA | 2023-07-21 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1965 | 1990 | 1.00 | 4 | -1.11 | 20 | -22.20 | |
| | Zaderman, Vitaly | | | 2174 | USA | 0.00 | 1 | -0.26 | 20 | -5.20 | |  Guth, Joseph Raymond | | | 1765 | USA | 1.00 | 1 | 0.22 | 20 | 4.40 | | | Gratz, Glen E | c | | 2111 | USA | 0.00 | 1 | -0.34 | 20 | -6.80 | | | Brock, William H | | | 1811 | USA | 0.00 | 1 | -0.73 | 20 | -14.60 | |
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) | | | | 6th Annual Irwin National Tournament of Senior State Champions | Grand Rapids, Michigan | USA | 2023-07-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2017 | 1990 | 1.50 | 4 | -0.47 | 20 | -9.40 | |
| | Fedorowicz, John P | g | | 2388 | USA | 0.00 | 1 | -0.08 | 20 | -1.60 | | | Lilly, Bryan | | | 1999 | USA | 0.50 | 1 | 0.01 | 20 | 0.20 | | | Rhine, Frederick S | | | 1890 | USA | 0.50 | 1 | -0.14 | 20 | -2.80 | | | Fischer, Robert J | | | 1790 | USA | 0.50 | 1 | -0.26 | 20 | -5.20 | |
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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