Tents ("Tents and Trees") is a logic puzzle. The task is a grid of squares, some of them contain trees. 1. Tents can only be placed onto areas with grass, not areas with trees. 2. Each tents must be next to its own tree. 3. Tents must not touch on either the sides or the corners of another tent. 4. Numbers at the ends of rows and columns show how many tents each must contain.