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Player:  Piet Wiersma  Age: 54 KNDB-rating on 1-7-2024: 861 Highest KNDB-rating ever: 867 Average KNDB-rating all time: 828  Virtual KNDB-rating : 862 Strongest win in last 10 years by Piet Wiersma (850): 16-01-2017 Tjalling Oegema (1059) (Provincial Teamcompetition Friesland) Weakest loss in last 10 years by Piet Wiersma (850): 07-11-2016 Miep Rops (609) (Provincial Teamcompetition Friesland)

Date	Tournament	Opponent	Rat	Ga		Pt	R.diff.	N.perc	N.pts
mo 13-05-2024	Summer Fryslan Friesland	Willem Lep	820	1	-	1	41	0.56	1.11
tu 21-05-2024	Summer Fryslan Friesland	Klaas Mondria	800	1	-	1	61	0.58	1.17
mo 27-05-2024	Summer Fryslan Friesland	Joeri Beke	886	1	-	1	-25	0.47	0.93
tu 04-06-2024	Summer Fryslan Friesland	Sjouke Zijlstra	759	1	-	1	102	0.64	1.28
mo 10-06-2024	Summer Fryslan Friesland	Geert Rozenberg	851	1	-	2	10	0.51	1.03
tu 18-06-2024	Summer Fryslan Friesland	Tabe de Vries	821	1	-	1	40	0.56	1.11
mo 24-06-2024	Summer Fryslan Friesland	Jan Sikkens	799	1	-	0	62	0.59	1.17
mo 01-07-2024	Summer Fryslan Friesland	Wim Riddersma	854	1	-	2	7	0.51	1.02
		Total:		8	-	9			8.82
		Correctionfactor:		5	(211 g.)
		Calculation:		9	-	8.82 x		5=	0.88
		Virtual rating:							862
		Aver.rating:	824	Perc.:			0.56	Diff.:	45
		TPR: