Hard Sudoku Booklet
A booklet of hard 9×9 puzzles. These require strategy chains — pointing pairs and box/line reasoning.
Tip: opens a print-ready booklet — press Cmd/Ctrl+P, then "Save as PDF".
Preview boards
2
8
1
3
8
8
4
6
9
2
1
5
6
7
3
7
8
8
9
7
3
7
3
5
1
2
9
2
3
6
7
8
7
1
6
6
4
1
2
2
6
9
7
3
9
4
6
1
2
5
3
2
5
6
5
7
1
3
4
2
8
9
6
1
4
5
4
7
1
7
2
8
5
7
3
9
1
3
4
8
6
8
9
2
6
2
1
8
7
4
5
7
9
6
2
1
9
7
7
6
5
3
9
8
6
7
1
7
2
4
6
9
Who this pack is for
Confident solvers.
When to use it
- Long flights
- Weekend deep-work
- Studying technique-by-technique
Tips for printing and solving
- Don't guess. If you guess on Hard you'll undo more than you write.
- Save the booklet — coming back later with fresh eyes often unsticks a board.