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Player:  Gerrit Halfman  Age: 90 KNDB-rating on 1-7-2023: 808 Highest KNDB-rating ever: 937 Average KNDB-rating all time: 849  Virtual KNDB-rating : 0 Strongest win in last 10 years by Gerrit Halfman (828): 04-12-2014 Theo Slütter (944) (Provincial Teamcompetition Gelderland) Weakest loss in last 10 years by Gerrit Halfman (828): 02-02-2015 Harry Bruins (751) (Provincial Teamcompetition Gelderland)

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: