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Player: Jan van der Kolk Age: 78
KNDB-rating on 1-7-2023: 925
Highest KNDB-rating ever: 964
Average KNDB-rating all time: 935
Virtual KNDB-rating : 931 Toernooibase Dammen

Strongest win in last 10 years by
Jan van der Kolk (921):
01-02-2020 Ab Steenbergen (1055)
(Dutch Teamcompetition KNDB)
Toernooibase Dammen Weakest loss in last 10 years by
Jan van der Kolk (964):
28-11-2016 Cees Bouman (706)
(Provincial Teamcompetition Overijssel)

FMJD-rating: 1968
Highest FMJD-rating ever: 1970
Average FMJD-rating all time: 1969
_{(Graphics FMJD-rating in period
KNDB-rating)}

Date	Tournament	Opponent	Rat	Ga		Pt	R.diff.	N.perc	N.pts
sa 09-09-2023	Dutch Teamcompetition KNDB	Herman Beuzel	817	1	-	2	108	0.65	1.29
sa 23-09-2023	Dutch Teamcompetition KNDB	Jan Huisjes	895	1	-	1	30	0.54	1.08
sa 14-10-2023	Dutch Teamcompetition KNDB	Nick Bolks	847	1	-	1	78	0.61	1.22
sa 04-11-2023	Dutch Teamcompetition KNDB	Frans Lamers	932	1	-	2	-7	0.49	0.98
mo 13-11-2023	Provincial Teamcompetition Overijssel	Henk van Ommen	852	1	-	2	73	0.6	1.2
sa 18-11-2023	Dutch Teamcompetition KNDB	Ruud de Kooter	1176	1	-	0	-251	0.19	0.38
sa 02-12-2023	Dutch Teamcompetition KNDB	Alexandra Betting	921	1	-	1	4	0.51	1.01
mo 11-12-2023	Provincial Teamcompetition Overijssel	Johan Wezenberg	896	1	-	1	29	0.54	1.08
sa 06-01-2024	Dutch Teamcompetition KNDB	Henk Pruim	911	1	-	1	14	0.52	1.04
mo 15-01-2024	Provincial Teamcompetition Overijssel	Willem Speksnijder	928	1	-	2	-3	0.5	0.99
sa 20-01-2024	Dutch Teamcompetition KNDB	Bennie Lawant	750	1	-	2	175	0.73	1.46
tu 30-01-2024	Provincial Teamcompetition Overijssel	Frank Jansen	1027	1	-	0	-102	0.36	0.72
sa 03-02-2024	Dutch Teamcompetition KNDB	Ulbe Koopman	988	1	-	0	-63	0.41	0.83
sa 17-02-2024	Dutch Teamcompetition KNDB	Iepie Poepjes-Koopman	947	1	-	1	-22	0.47	0.94
mo 19-02-2024	Provincial Teamcompetition Overijssel	Henk Klasen	999	1	-	1	-74	0.4	0.8
sa 02-03-2024	Dutch Teamcompetition KNDB	Wout Mensink	1026	1	-	1	-101	0.36	0.72
mo 11-03-2024	Provincial Teamcompetition Overijssel	Freek Jongerman	920	1	-	0	5	0.51	1.01
		Total:		17	-	18			16.76
		Correctionfactor:		5	(195 g.)
		Calculation:		18	-	16.76 x		5=	6.22
		Virtual rating:							931
		Aver.rating:	931	Perc.:			0.53	Diff.:	21
		TPR:	931	+	21				952