In 1937, Heinz Erwin van Mindeno became a junior member of the Vereenigd Amsterdamsch Schaak Genootschap (the Amsterdam chess association) and managed to attain the title of 'first-class' player (the national level just below that of master).
Partij verloren Gedenkboek ter herinnering aan de schake…
In addition, Jokos files (numbers 35499, 1466) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos files reveal that a claim was lodged for compensation for valuables surrendered to …