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Player:  Koos Prak  Age: 68 KNDB-rating on 1-7-2023: 973 Highest KNDB-rating ever: 1008 Average KNDB-rating all time: 969  Virtual KNDB-rating : 0 Strongest win in last 10 years by Koos Prak (992): 19-09-2015 Rein van der Wal (1098) (Dutch Teamcompetition KNDB) Weakest loss in last 10 years by Koos Prak (1008): 10-12-2016 Elisabeth Kramer (729) (Dutch Teamcompetition KNDB)

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: