Hard · 81 cells · about 15 min
Hidato Puzzle #147
Fill every empty cell of this 9×9 honeycomb with the numbers 1 to 81 so that consecutive numbers always touch. 23 cells are filled in for you. Solve it below, or print it and work on paper.
Download printable PDF2 pages · puzzle and solution · A4 and Letter
Tap a cell, then tap the number to place it.
Where to start
This board has 3 openings where only a single route is possible, so those numbers are forced:
- The 9 in row 5 and the 11 in row 6 are exactly 2 steps apart, and only one 2-step route connects them — so 10 is forced.
- The 17 in row 9 and the 19 in row 9 are exactly 2 steps apart, and only one 2-step route connects them — so 18 is forced.
- The 19 in row 9 and the 21 in row 7 are exactly 2 steps apart, and only one 2-step route connects them — so 20 is forced.
This puzzle at a glance
| Difficulty | Hard |
|---|---|
| Numbers to place | 1 – 81 |
| Grid | 9 × 9 honeycomb |
| Starting clues | 23 (28% of the board) |
| Longest gap between clues | 8 numbers |
| Typical solve time | about 15 minutes |
Solution
Only open this once you have had a proper go.