What makes these sudoku puzzles hard?

They begin with fewer clues than the easy and medium packs — each grid prints its exact count — which leaves longer chains of deduction. Every puzzle still has exactly one solution.

Can I print a single puzzle instead of all 60 pages?

Yes. Each puzzle sits on its own page in order, so entering a page range such as 14 in your printer dialog gives you just Hard Sudoku 13, since page 1 is the cover.

Is there room for pencil marks at this size?

Each cell prints at roughly 0.8 inches square around 36pt digits, which leaves usable corner space for small candidate notes.

Do hard and expert use the same grading?

Both come from the same four-level calibration; expert simply sits one step further. If hard puzzles fall quickly, the 50-puzzle expert pack is the next stop.

50 Hard Large Print Sudoku Puzzles (Free PDF, 36pt Digits)

50 hard sudoku puzzles, free as a single large print PDF. The grids are 9×9 with 36pt digits, printed one per page so there is room to work, and every grid shows how many clues it starts with. Answer keys sit at the back, six per page. Hard is the third of the four calibrated levels — expect fewer clues and slower solves. No signup required.

Hard Sudoku 1 — Clues: 23

		7					8
	7		4	8	5
6

	4				3		1
1		6	2	9
						9	5
5	2	9	1		7
		2				8

36pt · 9×9 grid · clue count printed on each puzzle · answer keys included · 1 per page

Download 50 hard large print sudoku with keys (free PDF)

What you get

Puzzles in set	50
Grid size	9×9
Clues per puzzle	23–28 — exact count on each grid
Font size	36pt Atkinson Hyperlegible digits
Puzzles per printed page	1
Answer keys	Included — last 9 pages, six keys per page
Paper	Prints at 100% on Letter and A4
File size	about 116 KB (60 pages)

What's in the set

Hard Sudoku 1 — Clues: 23

		7					8
	7		4	8	5
6

	4				3		1
1		6	2	9
						9	5
5	2	9	1		7
		2				8

Hard Sudoku 2 — Clues: 23

	7			1		9

	4		2				3
			8			5
	9		3			4
4	5				2	1
8		5
		7			8		9
	2		7				6

Hard Sudoku 3 — Clues: 23

Hard Sudoku 4 — Clues: 23

Hard Sudoku 5 — Clues: 28

Hard Sudoku 6 — Clues: 28

Hard Sudoku 7 — Clues: 28

Hard Sudoku 8 — Clues: 25

Hard Sudoku 9 — Clues: 28

Hard Sudoku 10 — Clues: 28

Hard Sudoku 11 — Clues: 28

Hard Sudoku 12 — Clues: 23

Hard Sudoku 13 — Clues: 28

Hard Sudoku 14 — Clues: 28

Hard Sudoku 15 — Clues: 23

Hard Sudoku 16 — Clues: 28

Hard Sudoku 17 — Clues: 25

Hard Sudoku 18 — Clues: 23

Hard Sudoku 19 — Clues: 28

Hard Sudoku 20 — Clues: 23

Hard Sudoku 21 — Clues: 23

Hard Sudoku 22 — Clues: 23

Hard Sudoku 23 — Clues: 28

Hard Sudoku 24 — Clues: 23

Hard Sudoku 25 — Clues: 23

Hard Sudoku 26 — Clues: 25

Hard Sudoku 27 — Clues: 23

Hard Sudoku 28 — Clues: 28

Hard Sudoku 29 — Clues: 25

Hard Sudoku 30 — Clues: 23

Hard Sudoku 31 — Clues: 25

Hard Sudoku 32 — Clues: 28

Hard Sudoku 33 — Clues: 23

Hard Sudoku 34 — Clues: 28

Hard Sudoku 35 — Clues: 23

Hard Sudoku 36 — Clues: 28

Hard Sudoku 37 — Clues: 25

Hard Sudoku 38 — Clues: 23

Hard Sudoku 39 — Clues: 25

Hard Sudoku 40 — Clues: 28

Hard Sudoku 41 — Clues: 28

Hard Sudoku 42 — Clues: 23

Hard Sudoku 43 — Clues: 25

Hard Sudoku 44 — Clues: 28

Hard Sudoku 45 — Clues: 23

Hard Sudoku 46 — Clues: 23

Hard Sudoku 47 — Clues: 23

Hard Sudoku 48 — Clues: 25

Hard Sudoku 49 — Clues: 23

Hard Sudoku 50 — Clues: 25

Download the full set: 50 Hard Large Print Sudoku Puzzles (Free PDF, 36pt Digits)

36pt · 9×9 grid · clue count printed on each puzzle · answer keys included · 1 per page

Download 50 hard large print sudoku with keys (free PDF)

Free PDF · no signup · free for personal, classroom, and care-facility use — not for resale.

Printing tips

Keep the print dialog at actual size — the grid is sized for 36pt digits at 100%.
Black-and-white, normal quality is plenty; there are no images to render.
Letter in the US, A4 elsewhere: the same PDF prints cleanly on both.

FAQ

Frequently asked questions

What makes these sudoku puzzles hard?: They begin with fewer clues than the easy and medium packs — each grid prints its exact count — which leaves longer chains of deduction. Every puzzle still has exactly one solution.
Can I print a single puzzle instead of all 60 pages?: Yes. Each puzzle sits on its own page in order, so entering a page range such as 14 in your printer dialog gives you just Hard Sudoku 13, since page 1 is the cover.
Is there room for pencil marks at this size?: Each cell prints at roughly 0.8 inches square around 36pt digits, which leaves usable corner space for small candidate notes.
Do hard and expert use the same grading?: Both come from the same four-level calibration; expert simply sits one step further. If hard puzzles fall quickly, the 50-puzzle expert pack is the next stop.