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Player:  Jan Ziengs  Age: 64
KNDB-rating on 1-7-2023: 992
Highest KNDB-rating ever: 1015
Average KNDB-rating all time: 990 
Virtual KNDB-rating : 989 Toernooibase Dammen

Strongest win in last 10 years by
Jan Ziengs (990):
17-02-2018 Sietze Rozema (1050)
(Dutch Teamcompetition KNDB)
Toernooibase Dammen Weakest loss in last 10 years by
Jan Ziengs (993):
24-10-2015 Mara Langeveld (875)
(Dutch Teamcompetition KNDB)		     
DateTournamentOpponentRatGaPtR.diff.N.percN.pts
sa 14-10-2023  Dutch Teamcompetition KNDB  Henk Veldhorst  883 1-2109 0.65 1.3
sa 18-11-2023  Dutch Teamcompetition KNDB  Geert Ploegman  817 1-1175 0.73 1.46
sa 20-01-2024  Dutch Teamcompetition KNDB  Johan Rademaker  1010 1-0-18 0.47 0.95
sa 17-02-2024  Dutch Teamcompetition KNDB  Nikolaus Schutte zur Wick  527 1-2465 0.95 1.9
 Total:4-55.6
 Correctionfactor:5 (164 g.)
 Calculation:5-5.6 x5=-3.01
 Virtual rating: 989
 Aver.rating: 809 Perc.:0.63Diff.: 91
 TPR: