In the mix workbook are 62 pages with exercises, which means as many as 62x12=648-16 (drawings e.o) = 728 puzzles.
The theme's are known from Step 5, Step 5 plus and the lower Steps. A workbook containing exercises with one ‘simple’ assignment: play the best move. Just like in a real game, you do not know whether you can win or whether you have to defend. First, look at what’s going on? Which targets can you exploit? What is the opponent threatening? Is it time to draw? In short, all kinds of stuff.
Two kinds of puzzles are different: on each page you will find a multiple choice question and a position with a line below the diagram. Only on the last 8 pages there is an indication of the theme: mate in two problems.