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Player:  Gert-Jan van Herwaarden  Age: 59 KNDB-rating on 1-7-2023: 966 Highest KNDB-rating ever: 991 Average KNDB-rating all time: 977  Virtual KNDB-rating : 947 Strongest win in last 10 years by Gert-Jan van Herwaarden (964): 25-11-2019 Yoshua van der Most (1031) (Provincial Championship Teams Z-Holland Zuid) Weakest loss in last 10 years by Gert-Jan van Herwaarden (966): 15-01-2024 Bert Kooij (775) (Provincial Championship Z-Holland Zuid)

Date	Tournament	Opponent	Rat	Ga		Pt	R.diff.	N.perc	N.pts
mo 25-09-2023	Provincial Championship Z-Holland Zuid	Teus Stam	963	1	-	0	3	0.5	1.01
mo 02-10-2023	Provincial Teamcompetition Z-Holland Zuid	Daniel van der Ham	653	1	-	2	313	0.86	1.73
mo 16-10-2023	Provincial Championship Z-Holland Zuid	Jorrit Roest	567	1	-	1	399	0.92	1.84
mo 06-11-2023	Provincial Championship Z-Holland Zuid	Barend Stravers	910	1	-	2	56	0.58	1.16
mo 18-12-2023	Provincial Championship Z-Holland Zuid	Jeroen Schakel	1097	1	-	0	-131	0.32	0.65
mo 15-01-2024	Provincial Championship Z-Holland Zuid	Bert Kooij	775	1	-	0	191	0.75	1.5
tu 30-01-2024	Provincial Teamcompetition Z-Holland Zuid	Cees de Jong	795	1	-	1	171	0.73	1.45
mo 05-02-2024	Provincial Championship Z-Holland Zuid	Piet Trapman Sr.	1144	1	-	0	-178	0.27	0.53
mo 26-02-2024	Provincial Championship Z-Holland Zuid	Jan Alting	915	1	-	2	51	0.57	1.14
mo 11-03-2024	Provincial Teamcompetition Z-Holland Zuid	Ernst de Heer	968	1	-	0	-2	0.5	0.99
mo 08-04-2024	Provincial Championship Z-Holland Zuid	Peter van Noordennen	1102	1	-	1	-136	0.32	0.63
mo 06-05-2024	Provincial Teamcompetition Z-Holland Zuid	Machiel Hoogendoorn	900	1	-	1	66	0.59	1.18
		Total:		12	-	10			13.81
		Correctionfactor:		5	(149 g.)
		Calculation:		10	-	13.81 x		5=	-19.04
		Virtual rating:							947
		Aver.rating:	899	Perc.:			0.42	Diff.:	-60
		TPR:	899	+	-60				839