How to Solve Paint by Pairs Puzzles
Link identical pairs of numbers with a number of cells equal to that number, including the start and end cells. Fill in those links to form a picture.
How to Solve Snake Puzzles
Use the clues to uncover the body of a snake, given the location of the head and tail. The body is a 1-cell wide path that travels only in orthogonal directions and may never touch itself, even diagonally.