I'm not sure if its been posted elsewhere on this site or if I'm in the right category, but I was thinking it would be a cool idea for Chess.com to add blind puzzles/tactics or an option which makes the pieces disappear, similar to one of the drills from the Magnus Trainer App. Not sure about everyone else, but it would help me a bit with planning attacks since I seem to end up blundering a lot of my good-in-theory plans.