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Player:  Jan Vorthoren  Age: 74 KNDB-rating on 1-7-2023: 674 Highest KNDB-rating ever: 721 Average KNDB-rating all time: 665  Virtual KNDB-rating : 677 Strongest win in last 10 years by Jan Vorthoren (659): 06-01-2015 David Visser (890) (Cupcompetition Z-Holland Zuid) Weakest loss in last 10 years by Jan Vorthoren (669): 25-10-2018 Jan Joost de Jong (638) (Provincial Teamcompetition Z-Holland Zuid)

Date	Tournament	Opponent	Rat	Ga		Pt	R.diff.	N.perc	N.pts
tu 19-09-2023	Provincial Teamcompetition Z-Holland Zuid	Piet van Essen	606	1	-	1	68	0.59	1.19
tu 03-10-2023	Provincial Teamcompetition Z-Holland Zuid	Ko Heikoop	825	1	-	1	-151	0.3	0.6
mo 04-12-2023	Provincial Teamcompetition Z-Holland Zuid	Joop Kwakernaak	1005	1	-	0	-331	0.12	0.25
tu 09-01-2024	Cupcompetition Z-Holland Zuid	Jan Alting	915	1	-	1	-241	0.2	0.4
tu 16-04-2024	Provincial Teamcompetition Z-Holland Zuid	Henk van der Pols	610	1	-	1	64	0.59	1.18
		Total:		5	-	4			3.61
		Correctionfactor:		7.5	(97 g.)
		Calculation:		4	-	3.61 x		7.5=	2.94
		Virtual rating:							677
		Aver.rating:	792	Perc.:			0.4	Diff.:	-72
		TPR: