Hard · 81 cells · about 17 min
Hidato Puzzle #140
Fill every empty cell of this 9×9 honeycomb with the numbers 1 to 81 so that consecutive numbers always touch. 28 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 53 in row 1 and the 56 in row 1 are exactly 3 steps apart, and only one 3-step route connects them — so 54 and 55 are forced.
- The 19 in row 7 and the 21 in row 9 are exactly 2 steps apart, and only one 2-step route connects them — so 20 is forced.
- The 30 in row 8 and the 32 in row 7 are exactly 2 steps apart, and only one 2-step route connects them — so 31 is forced.
This puzzle at a glance
| Difficulty | Hard |
|---|---|
| Numbers to place | 1 – 81 |
| Grid | 9 × 9 honeycomb |
| Starting clues | 28 (35% of the board) |
| Longest gap between clues | 12 numbers |
| Typical solve time | about 17 minutes |
Solution
Only open this once you have had a proper go.