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Player:  Arie Koster  Age: 75
KNDB-rating on 1-7-2023: 1004
Highest KNDB-rating ever: 1011
Average KNDB-rating all time: 974 
Virtual KNDB-rating : 1018 Toernooibase Dammen

Strongest win in last 10 years by
Arie Koster (977):
29-10-2022 Kees Romijn (1259)
(Dutch Teamcompetition KNDB)
Toernooibase Dammen Weakest loss in last 10 years by
Arie Koster (960):
19-01-2019 Tanya-Marie Cnossen (681)
(Dutch Teamcompetition KNDB)

FMJD-rating: 1951
Highest FMJD-rating ever: 1995
Average FMJD-rating all time: 1981
(Graphics FMJD-rating in period
KNDB-rating)
     
DateTournamentOpponentRatGaPtR.diff.N.percN.pts
sa 09-09-2023  Dutch Teamcompetition KNDB  Hein Wilsens  1195 1-0-191 0.25 0.5
mo 18-09-2023  Provincial Teamcompetition Utrecht  Jasmina Benhari  734 1-2270 0.83 1.66
sa 23-09-2023  Dutch Teamcompetition KNDB  Bert Kooij  775 1-1229 0.79 1.58
tu 03-10-2023  Provincial Teamcompetition Utrecht  Gerrit Pul  873 1-2131 0.68 1.35
mo 23-10-2023  Provincial Teamcompetition Utrecht  Chris Schippers  839 1-1165 0.72 1.44
th 09-11-2023  Provincial Teamcompetition Utrecht  Mahesh Shankar  868 1-2136 0.68 1.37
sa 18-11-2023  Dutch Teamcompetition KNDB  Frans Goossens  802 1-1202 0.76 1.52
mo 20-11-2023  Provincial Teamcompetition Utrecht  Peter Frans Koops  1129 1-1-125 0.33 0.66
sa 02-12-2023  Dutch Teamcompetition KNDB  Jeroen Huskens  841 1-1163 0.72 1.43
th 07-12-2023  Provincial Teamcompetition Utrecht  Jude Kasangaki  901 1-2103 0.64 1.28
we 03-01-2024  Provincial Championship Utrecht  Nico Verhoeven  931 1-173 0.6 1.2
sa 06-01-2024  Dutch Teamcompetition KNDB  Frank Swagemakers  986 1-118 0.53 1.05
sa 20-01-2024  Dutch Teamcompetition KNDB  Hans Loots  865 1-0139 0.69 1.37
mo 29-01-2024  Provincial Championship Utrecht  Harry Vredeveldt  805 1-2199 0.76 1.51
we 31-01-2024  Provincial Championship Utrecht  Jude Kasangaki  901 1-2103 0.64 1.28
sa 03-02-2024  Dutch Teamcompetition KNDB  Marjory Feyt  826 1-1178 0.73 1.47
mo 12-02-2024  Provinciale Bekercompetitie Utrecht  Ed Kok  1139 1-1-135 0.32 0.64
we 14-02-2024  Provincial Championship Utrecht  Dirk Bijkerk  976 1-128 0.54 1.08
we 28-02-2024  Provincial Championship Utrecht  Jaap Langerak  907 1-297 0.63 1.27
sa 02-03-2024  Dutch Teamcompetition KNDB  Bert van Lieshout  725 1-2279 0.84 1.67
we 13-03-2024  Provincial Championship Utrecht  Jan Koerselman  982 1-222 0.53 1.06
sa 16-03-2024  Dutch Teamcompetition KNDB  Michiel Hagreis  1058 1-2-54 0.43 0.85
 Total:22-3027.24
 Correctionfactor:5 (420 g.)
 Calculation:30-27.24 x5=13.81
 Virtual rating: 1018
 Aver.rating: 912 Perc.:0.68Diff.: 135
 TPR: 912 +135 1047