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Player:  Jan Harm Alkema  Age: 56
KNDB-rating on 1-7-2023: 1196
Highest KNDB-rating ever: 1224
Average KNDB-rating all time: 1184 
Virtual KNDB-rating : 1198 Toernooibase Dammen

Strongest win in last 10 years by
Jan Harm Alkema (1171):
26-11-2016 Marthy van Houtert (1162)
(Dutch Teamcompetition KNDB)
Toernooibase Dammen Weakest loss in last 10 years by
Jan Harm Alkema (1170):
07-02-2015 IJsbrand Haven (1223)
(Dutch Teamcompetition KNDB)		     
DateTournamentOpponentRatGaPtR.diff.N.percN.pts
sa 02-03-2024  Dutch Teamcompetition KNDB  Jan Koerselman  982 1-2214 0.77 1.55
 Total:1-21.55
 Correctionfactor:5 (252 g.)
 Calculation:2-1.55 x5=2.27
 Virtual rating: 1198
 Aver.rating: 1089 Perc.:0.75Diff.: 193
 TPR: