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Player:  Harm Wiersma  Age: 70
KNDB-rating on 1-7-2023: 1533
Highest KNDB-rating ever: 1612
Average KNDB-rating all time: 1538 
Virtual KNDB-rating : 1519 Toernooibase Dammen

Strongest win in last 10 years by
Harm Wiersma (1505):
03-02-2018 Raimonds Vipulis (1463)
(Dutch Teamcompetition KNDB)
Toernooibase Dammen Weakest loss in last 10 years by
Harm Wiersma (1540):
15-02-2020 Thijs van den Broek (1334)
(Dutch Teamcompetition KNDB)

FMJD-rating: 2384
Highest FMJD-rating ever: 2430
Average FMJD-rating all time: 2386
(Graphics FMJD-rating in period
KNDB-rating)

 Highest Historical
Toernooibaserating on 01-01-1977:  1696 D
     
DateTournamentOpponentRatGaPtR.diff.N.percN.pts
sa 09-09-2023  Dutch Teamcompetition KNDB  Leo Faber  1299 1-1234 0.79 1.59
sa 23-09-2023  Dutch Teamcompetition KNDB  Gerbrand Hessing  1263 1-2270 0.83 1.66
sa 14-10-2023  Dutch Teamcompetition KNDB  Christian Niami  1394 1-0139 0.69 1.37
sa 04-11-2023  Dutch Teamcompetition KNDB  Damien Come Aligna Messinga  1455 1-178 0.61 1.22
sa 18-11-2023  Dutch Teamcompetition KNDB  Gep Leeflang  1282 1-2251 0.81 1.62
sa 02-12-2023  Dutch Teamcompetition KNDB  Peter Kort  1302 1-1231 0.79 1.58
sa 06-01-2024  Dutch Teamcompetition KNDB  Bas Messemaker  1421 1-1112 0.65 1.3
sa 20-01-2024  Dutch Teamcompetition KNDB  Michel Stempher  1410 1-1123 0.67 1.33
sa 03-02-2024  Dutch Teamcompetition KNDB  Simon Harmsma  1355 1-2178 0.73 1.47
sa 17-02-2024  Dutch Teamcompetition KNDB  Toine Brouwers  1408 1-1125 0.67 1.34
sa 02-03-2024  Dutch Teamcompetition KNDB  Sven Winkel  1418 1-1115 0.66 1.31
 Total:11-1315.79
 Correctionfactor:5 (467 g.)
 Calculation:13-15.79 x5=-13.94
 Virtual rating: 1519
 Aver.rating: 1364 Perc.:0.59Diff.: 66
 TPR: 1364 +66 1430