The images you are about to see are mockups demonstrating functionality, so do not focus on the consistency of the data.

A chapter of a study can have multiple possible variations, which will be represented as follows:

Once on this page, you can browse through all the moves of a variation and manually check or uncheck them.

Then, start the review and try to guess the move! 😉

When you have guessed all the moves, you receive a summary of your current performance compared to your overall performance. In short, you can see whether you have improved.