Repetition is an important part of learning how to play chess. Going over the same patterns in different situations will help students to memorize and recognize positions in real games.
The workbooks 'Extra' repeat the subjects of the basic workbooks. All with new and unique exercises. They are highly recommended for students who have trouble with the basic workbooks, before moving on to the next step.
The answers of the workbooks 'Extra' can be downloaded from our site. See 'workbook answers' in the menu.