PuzzeasyHard Sudoku — Puzzle 81
26 clues · Puzzeasy · puzzeasy.com/sudoku/hard/81
| 8 | 6 | 7 | 5 | |||||
| 7 | 1 | 9 | 6 | |||||
| 3 | ||||||||
| 1 | 7 | 8 | ||||||
| 7 | 5 | 1 | 4 | |||||
| 2 | 3 | 9 | 6 | |||||
| 6 | ||||||||
| 2 | 7 | |||||||
| 9 | 8 | 4 |
How to play
Fill every row, every column and every 3 by 3 box with the numbers 1 to 9, using each number once.
This puzzle has 26 given numbers and exactly one solution, so it can always be finished by reasoning alone.
Solution
Hard Sudoku — Puzzle 81
| 2 | 8 | 4 | 9 | 6 | 1 | 7 | 3 | 5 |
| 5 | 7 | 1 | 8 | 4 | 3 | 9 | 2 | 6 |
| 9 | 6 | 3 | 5 | 7 | 2 | 1 | 4 | 8 |
| 4 | 5 | 6 | 1 | 2 | 7 | 8 | 9 | 3 |
| 3 | 9 | 7 | 6 | 8 | 5 | 2 | 1 | 4 |
| 1 | 2 | 8 | 3 | 9 | 4 | 5 | 6 | 7 |
| 7 | 4 | 5 | 2 | 1 | 6 | 3 | 8 | 9 |
| 8 | 3 | 2 | 4 | 5 | 9 | 6 | 7 | 1 |
| 6 | 1 | 9 | 7 | 3 | 8 | 4 | 5 | 2 |