What is Tents and Trees?
Tents and Trees (also called Tents puzzle) is a logic puzzle set on a campground grid. Every tree needs exactly one tent pitched in a cell directly beside it — above, below, left, or right. Tents are unsociable: no two tents may touch, not even diagonally. The numbers along the top and left edges tell you exactly how many tents stand in each column and row. From the trees and the counts alone, the entire campsite can be deduced.
How to play:
- Choose a grid size and how many puzzles you want to solve, then click Start Puzzle
- Tap or click a cell to cycle it: empty → ⛺ tent → · grass mark → empty
- Grass marks are optional helpers to note cells that can't hold a tent — they don't affect completion
- Trees are fixed and can't be changed
- Row and column numbers fade when their count is satisfied, and turn red if you've placed too many
- The puzzle completes automatically the moment all tents are correctly placed
Core solving techniques:
- Zero lines: Rows or columns marked 0 contain no tents — mark them all as grass immediately
- Dead cells: Any cell not orthogonally next to a tree can never hold a tent
- Forced tents: A tree with only one free neighboring cell forces its tent there
- Full lines: When a row or column reaches its tent count, everything else in it is grass
- Spacing: Every placed tent eliminates all eight surrounding cells — use that ripple to lock in neighbors
- Every puzzle here is generated with exactly one solution
Scoring:
- Total Time: Active solving time — pauses between puzzles are excluded
- Avg per Puzzle: Total time divided by puzzles solved
- Hints Used: Each hint fixes one cell — fewer is better