1. Tents & Trees study 1
7 steps in the included checked route. Try the board first, then compare the reasoning.
PRACTICE COLLECTION
Clear impossible tent squares
Start with zero lines and the four-direction tree rule. Learn why a promising-looking square can be grass before any tent has been placed.
Print these three studies with answers
Start with a decision
TRY IT 1 · tents-zero-lines-1
| C11 | C21 | C30 | C41 | C51 | C62 | |
|---|---|---|---|---|---|---|
| R11 | ||||||
| R21 | ||||||
| R30 | ||||||
| R42 | ||||||
| R50 | ||||||
| R62 |
What can you justify?
Use the zero lines technique. What does it prove about R2C3? Treat the displayed starting marks as established facts.
Written explanation
A row or column clue of zero allows no tents. Mark R2C3, R3C1, R3C2, R3C3, R3C4, R3C6, R4C3, R5C1, R5C2, R5C3, R5C5, R6C3 as grass; tree squares stay unchanged.
TRY IT 2 · tents-adjacency-1
| C11 | C21 | C30 | C41 | C51 | C62 | |
|---|---|---|---|---|---|---|
| R11 | ||||||
| R21 | ||||||
| R30 | ||||||
| R42 | ||||||
| R50 | ||||||
| R62 |
What can you justify?
Use the tree neighbours technique. What does it prove about R1C1? Treat the displayed starting marks as established facts.
Written explanation
R1C1, R1C5, R1C6, R2C1, R2C2, R2C4, R2C6, R3C1, R3C3, R5C1, R6C1, R6C2, R6C3 have no tree directly above, below, left or right. A diagonal tree is not sufficient, so these squares are grass.
Apply the ideas to a complete board
These are fixed original studies, not new daily puzzles. The three study links below and this collection’s printable pack use identical starting positions. Their checked solution routes are included on each practice page. A collection’s technique drills may also appear in its lessons.
2. Tents & Trees study 2
8 steps in the included checked route. Try the board first, then compare the reasoning.
3. Tents & Trees study 3
8 steps in the included checked route. Try the board first, then compare the reasoning.