Puzzles for Brain Tents - 200 Hard Puzzles 9x9 vol. 3 - Alexander Rodriguez - Bog

Tents ("Tents and Trees") is a logic puzzle.The playing board is divided into squares. In some of them there are trees. The goal is to place tents in the free blocks by following several conditions: The number of tents and trees are equal. Tent must be located next (horizontaly and verticaly) to at least one tree. There can not be tents near to other tents (horizontally, verticaly and diagonaly). The number of tents in each row, and in each column, matches the numbers given round the sides of the grid.