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Player: Jan Koerselman Age: 71
KNDB-rating on 1-7-2023: 982
Highest KNDB-rating ever: 1063
Average KNDB-rating all time: 958
Virtual KNDB-rating : 967 Toernooibase Dammen

Strongest win in last 10 years by
Jan Koerselman (923):
23-08-2019 Leo van der Laan (1182)
(Kampioenschap 65+ Utrecht)
Toernooibase Dammen Weakest loss in last 10 years by
Jan Koerselman (938):
10-11-2018 Matheo Boxum (715)
(Dutch Teamcompetition KNDB)

FMJD-rating: 1906
Highest FMJD-rating ever: 2001
Average FMJD-rating all time: 1925
_{(Graphics FMJD-rating in period
KNDB-rating)}

Date	Tournament	Opponent	Rat	Ga		Pt	R.diff.	N.perc	N.pts
we 28-06-2023	BaarnOpen DBS Baarn Soest	Berend Plijter	1034	1	-	0	-52	0.43	0.86
th 29-06-2023	BaarnOpen DBS Baarn Soest	Anthony Keijzer	970	1	-	1	12	0.52	1.03
th 29-06-2023	BaarnOpen DBS Baarn Soest	Matthijs Broek	853	1	-	2	129	0.67	1.35
fr 30-06-2023	BaarnOpen DBS Baarn Soest	Rob Lutje Schipholt	1058	1	-	1	-76	0.4	0.79
fr 30-06-2023	BaarnOpen DBS Baarn Soest	Cock van Wijk	1212	1	-	1	-230	0.21	0.42
sa 01-07-2023	BaarnOpen DBS Baarn Soest	Gerard Bruins	1016	1	-	1	-34	0.45	0.9
sa 01-07-2023	BaarnOpen DBS Baarn Soest	Jacques Brouns	1046	1	-	1	-64	0.41	0.82
mo 03-07-2023	Summerdraughtsweek DCH Heerenveen - Mildam	John Folkers	1011	1	-	1	-29	0.46	0.92
tu 04-07-2023	Summerdraughtsweek DCH Heerenveen - Mildam	Cor Westerveld	1190	1	-	0	-208	0.23	0.47
tu 04-07-2023	Summerdraughtsweek DCH Heerenveen - Mildam	Gaele Stoker	1087	1	-	1	-105	0.36	0.71
we 05-07-2023	Summerdraughtsweek DCH Heerenveen - Mildam	Martin de Wolf	1156	1	-	0	-174	0.27	0.54
we 05-07-2023	Summerdraughtsweek DCH Heerenveen - Mildam	Geert Rozenberg	860	1	-	1	122	0.67	1.33
th 06-07-2023	Summerdraughtsweek DCH Heerenveen - Mildam	Aart de Bruyn	1007	1	-	1	-25	0.47	0.93
th 06-07-2023	Summerdraughtsweek DCH Heerenveen - Mildam	Eibert Smit	951	1	-	0	31	0.54	1.09
fr 07-07-2023	Summerdraughtsweek DCH Heerenveen - Mildam	Martin Boersbroek	994	1	-	1	-12	0.48	0.97
mo 28-08-2023	Provincial Championship 65+ Utrecht	Evert van de Pol	1109	1	-	1	-127	0.33	0.66
tu 29-08-2023	Provincial Championship 65+ Utrecht	Harry Vredeveldt	805	1	-	1	177	0.73	1.46
we 30-08-2023	Provincial Championship 65+ Utrecht	Leo van der Laan	1161	1	-	0	-179	0.27	0.53
we 30-08-2023	Provincial Championship 65+ Utrecht	Jan Ongolesono	1038	1	-	1	-56	0.42	0.84
th 31-08-2023	Provincial Championship 65+ Utrecht	Adri Timp	792	1	-	2	190	0.75	1.49
fr 01-09-2023	Provincial Championship 65+ Utrecht	Wim Vlooswijk	1056	1	-	0	-74	0.4	0.8
sa 09-09-2023	Dutch Teamcompetition KNDB	Jaap Vos	976	1	-	1	6	0.51	1.02
sa 04-11-2023	Dutch Teamcompetition KNDB	Nico Lugthart	1200	1	-	0	-218	0.22	0.45
tu 07-11-2023	Provincial Teamcompetition Gelderland	Herman Visschers	779	1	-	1	203	0.76	1.52
tu 14-11-2023	Provincial Teamcompetition Overijssel	Bert Nieboer	845	1	-	2	137	0.68	1.37
sa 18-11-2023	Dutch Teamcompetition KNDB	Jan Visschers	943	1	-	2	39	0.55	1.11
we 22-11-2023	Provincial Teamcompetition Gelderland	Thomas Esselink	829	1	-	1	153	0.7	1.41
sa 02-12-2023	Dutch Teamcompetition KNDB	Leo Peters	1013	1	-	0	-31	0.46	0.91
fr 08-12-2023	Provincial Teamcompetition Overijssel	Damon Winter	1096	1	-	1	-114	0.34	0.69
mo 11-12-2023	Provincial Teamcompetition Gelderland	Henk Tuenter	818	1	-	2	164	0.72	1.43
we 03-01-2024	Provincial Championship Utrecht	Hans Loots	865	1	-	0	117	0.66	1.32
sa 06-01-2024	Dutch Teamcompetition KNDB	Arnold Wiegersma	1006	1	-	0	-24	0.47	0.93
tu 16-01-2024	Provincial Teamcompetition Gelderland	Pascal Slutter	1025	1	-	1	-43	0.44	0.88
we 17-01-2024	Provincial Championship Utrecht	Eric Dubelaar	848	1	-	1	134	0.68	1.36
sa 20-01-2024	Dutch Teamcompetition KNDB	Han Borgman	1138	1	-	1	-156	0.29	0.59
th 25-01-2024	Provincial Teamcompetition Gelderland	Jan Fokkink	856	1	-	2	126	0.67	1.34
we 31-01-2024	Provincial Championship Utrecht	Leo van Raaij	859	1	-	2	123	0.67	1.33
sa 03-02-2024	Dutch Teamcompetition KNDB	Johnny Modderman	1046	1	-	1	-64	0.41	0.82
we 14-02-2024	Provincial Championship Utrecht	Hans Vermeij	765	1	-	1	217	0.78	1.55
sa 17-02-2024	Dutch Teamcompetition KNDB	Hans Zondervan	1253	1	-	0	-271	0.17	0.34
we 28-02-2024	Provincial Championship Utrecht	Ben van der Linden	907	1	-	2	75	0.6	1.21
fr 01-03-2024	Provincial Teamcompetition Overijssel	Luit Haan	948	1	-	2	34	0.55	1.1
sa 02-03-2024	Dutch Teamcompetition KNDB	Jan Harm Alkema	1196	1	-	0	-214	0.23	0.45
tu 12-03-2024	Provincial Teamcompetition Gelderland	Chris Grevers	1084	1	-	0	-102	0.36	0.72
we 13-03-2024	Provincial Championship Utrecht	Arie Koster	1004	1	-	0	-22	0.47	0.94
sa 16-03-2024	Dutch Teamcompetition KNDB	Ed Kok	1139	1	-	0	-157	0.29	0.58
fr 22-03-2024	Provincial Teamcompetition Overijssel	Jan Boender	943	1	-	2	39	0.55	1.11
we 03-04-2024	Provincial Championship Utrecht	Jan Vermeulen	867	1	-	1	115	0.66	1.31
we 10-04-2024	Provincial Championship Utrecht	Chris Schippers	839	1	-	2	143	0.69	1.38
		Total:		49	-	45			48.1
		Correctionfactor:		5	(480 g.)
		Calculation:		45	-	48.1 x		5=	-15.49
		Virtual rating:							967
		Aver.rating:	990	Perc.:			0.46	Diff.:	-29
		TPR:	990	+	-29				961