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Individual Calculations February 2023 |
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| Boersma, Jan Total change: 69.60 | |   |
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| Chessfestival Groningen 2022 Compact | Groningen | NED | 2022-12-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2064 | 1919 | 3.50 | 5 | 1.95 | 20 | 39.00 | |
|  Kanis, Sierk | | | 2054 | NED | 0.50 | 1 | 0.18 | 20 | 3.60 | |  Kindt, Manfred | | | 2076 | NED | 0.50 | 1 | 0.21 | 20 | 4.20 | | | Termeulen, Albert | | | 2055 | NED | 0.50 | 1 | 0.18 | 20 | 3.60 | | | Wubben, Marcel | | | 2010 | NED | 1.00 | 1 | 0.62 | 20 | 12.40 | | | Vroombout, Enrico | | | 2124 | NED | 1.00 | 1 | 0.76 | 20 | 15.20 | |
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) | | | | Tata Steel Tienkampen 2023 | Wijk aan Zee | NED | 2023-01-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1969 | 1925 | 5.50 | 9 | 1.53 | 20 | 30.60 | |
| | Lardinois, Wouter | | | 1981 | NED | 0.50 | 1 | 0.08 | 20 | 1.60 | | | Bodicker, Rob | | | 2004 | NED | 1.00 | 1 | 0.61 | 20 | 12.20 | | | Kastelijn, Twan | | | 1899 | NED | 0.50 | 1 | -0.04 | 20 | -0.80 | | | Heijboer, Pieter | | | 2001 | NED | 0.50 | 1 | 0.10 | 20 | 2.00 | | | Otten, Colleen | | | 2007 | NED | 0.50 | 1 | 0.11 | 20 | 2.20 | | | Van Den Bos, Henk | | | 1992 | NED | 0.50 | 1 | 0.09 | 20 | 1.80 | | | Berghuis, Marten | | | 1968 | NED | 1.00 | 1 | 0.56 | 20 | 11.20 | | | Van De Lagemaat, Arend | | | 2016 | NED | 0.50 | 1 | 0.12 | 20 | 2.40 | | | Albrecht, Alex | | | 1849 | NED | 0.50 | 1 | -0.10 | 20 | -2.00 | |
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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