De schaakopening
type: CreativeWork
type: ProductModel
type: Book
is part of: p821957031
main entity of page: https://data.bibliotheken.nl/.well-known/genid/93f670c8e68d663476fd49b7bcce111f
about: p075621142
about: p397586418
contributor: p068575319
language: nl
number of pages: 64
issue number: boer
issued: 1981