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Player:  Klaas Koopman  Age: 96 KNDB-rating on 1-7-2023: 868 Highest KNDB-rating ever: 1158 Average KNDB-rating all time: 974  Virtual KNDB-rating : 0 Strongest win in last 10 years by Klaas Koopman (932): 11-02-2015 John Folkers (1000) (Provincial Championship sen Friesland) Weakest loss in last 10 years by Klaas Koopman (929): 25-01-2017 Sjouke Zijlstra (730) (FK 50 - 65 plus DCH Heerenveen - Mildam)  Highest Historical Toernooibaserating on 01-01-1973:  1325 D

Date	Tournament	Opponent	Rat	Ga		Pt	R.diff.	N.perc	N.pts
		Correctionfactor:		7.5	( g.)
		Calculation:			-	0 x		7.5=	0
		Virtual rating:							0
		Aver.rating:	0	Perc.:			0.5	Diff.:	0
		TPR: