A Tents puzzle consists of a square or rectangular array of squares in which some of the squares contain a tree, with the remainder containing only grass. The puzzle is solved by placing tents into selected grassy squares so that each tree has its own tent (either horizontally or vertically), and each tent has its own tree (either horizontally or vertically). The squares in which tents are placed must not touch on either the sides or the corners. Numbers located to the side and to the bottom of the puzzle tell you how many tents are in each row and column.Tents is also known as: Tents and Trees, Camping puzzle or Architect puzzle.