Sleutelconcepten in Het Middenspel - Volume 1 - de EgelHerman Grooten · First published 2021Open the Tome
Understanding Before Moving - Volume 1 - Revised and Extended Second EditionHerman Grooten · First published 2021Open the Tome
Understanding Before Moving 3 - Part 2Herman Grooten · First published 2020 · Latest edition 2021Open the Tome
Understanding Before Moving 2 - Queen's Gambit StructuresHerman Grooten · First published 2019Open the Tome
