Themes
Each theme is a set of gems that belong together, and one video that walks through all of them.
Probability Paradoxes
Puzzles where your gut says one thing and a thousand coin flips say another.
Cut, Fold and Fit
Sofas around corners, shapes from a single cut, and the shortest roads between towns.
Codes and Winning Strategies
Card tricks that correct errors, games you can always win, and how to find the poisoned test tube.