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account administration administrative council affiliation age arbiter articles of association Belgen in het buitenland belgian championship belgian youth championship BK blitz 2025 bk2024 blitz board budapest BYCC championship checklist chess history chess table club manager communication community daniel dardha daniel dharda database Dolle Toren Leuven Dortmund educational chess ELO ELO calculation EYCC faq federations fide FIDE ELO fide id gdpr general assembly homologation interclub interclub manager international internship kasparov league antwerp leagues members membership new player newsletter non-profit npo Olympiads pairtwo player player database player manager president rapid rate of play rating RBCF registration schaakbibliotheek school school chess support survey swar time control tournament leader tournament-announcement tournaments transgender vademecum workgroup workgroups World Youth Championship youth