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![]() Player: Sietse Jonker Age: 62 KNDB-rating on 1-7-2024: 884 Highest KNDB-rating ever: 967 Average KNDB-rating all time: 909 Virtual KNDB-rating : 0 Strongest win in last 10 years by Sietse Jonker (900): 05-10-2015 Jacob Poortinga (1079) (Provincial Teamcompetition Friesland) Sietse Jonker (915): 15-02-2023 Dirk Zwier (715) (Frisian Championship seniors DCH Heerenveen - Mildam) |