Comment by Matetricks

In the videos before each set of exercises, I try to lay out all of the key ideas so you have in your arsenal everything you need to successfully complete the lesson. I probably don't succeed in this goal all of the time, so your feedback is very useful for me in rethinking how a user progresses through the exercises. Providing an option to read the solution after a certain number of incorrect moves may improve the overall experience and discourage brute-forcing the answer.