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Player:  Sjef Valk Sr.  KNDB-rating on 1-7-2023: 0 Highest KNDB-rating ever: 1132 Average KNDB-rating all time: 1001  Virtual KNDB-rating : 0 Strongest win in last 10 years by Sjef Valk Sr. (915): 20-11-2014 Harry Vredeveldt (779) (Provincial Teamcompetition Utrecht) Weakest loss in last 10 years by Sjef Valk Sr. (915): 30-10-2014 Jaap van Walsem (956) (Provincial Teamcompetition Utrecht)  Highest Historical Toernooibaserating on 01-01-1994:  1126 D

Date	Tournament	Opponent	Rat	Ga		Pt	R.diff.	N.perc	N.pts
		Correctionfactor:		7.5	( g.)
		Virtual rating:
		Aver.rating:	0	Perc.:			0.5	Diff.:	0
		TPR: