Logic Puzzle Pack Vol. 1 — 120 Printable Nonograms, X-Sudoku & Sum Cross Puzzles with Answers (PDF, Letter & A4, Large Print)

120 logic puzzles, and every one has exactly one solution.

There are three kinds of puzzle, each graded from easy to hard. Print them as often as you like.

What's inside

• 40 Nonograms (shade the grid to reveal a picture), from 5×5 warm-ups to 15×15 challenges. Hand-drawn pictures (a cat, an owl, a lantern, a pagoda, a sailboat…) mixed with symmetric patterns. Every one can be solved line by line, without guessing.

• 40 X-Sudoku (classic 9×9 rules, plus both long diagonals): 14 easy, 13 medium, 13 hard. Easy and medium need only single-candidate logic. Hard ones need pairs and box/line interactions, but never trial and error.

• 40 Sum Cross puzzles (cross sums: fill the white cells so each run adds up to its clue, with no repeated digits), from 5×5 to 9×9.

• Answer key as a separate PDF, so you can print the puzzles without spoilers. Nonogram answers show the hidden picture and its name.

• Large-print edition: one puzzle per page, with bigger grids and digits, and answers at the back.

• US Letter and A4 versions of everything.

• CSV index of all 120 puzzles: type, size, difficulty, page numbers and a solution hash.

Checked twice

Every puzzle was generated by computer and checked by two independent solvers:

• the generator's own solver

• a separate SAT-solver proof that no second solution exists

All 120 passed both checks. Every printed answer matches.

Files

Logic_Puzzle_Pack_Vol1_v1.zip contains:

• Puzzles (71 pages), Letter and A4

• Answer key, Letter and A4

• Large-print edition, Letter and A4

• CSV index

• README, licence and a verification note

Good for

• Coffee breaks

• Travel

• Classrooms and puzzle clubs (teachers may print copies for their own students)

• Anyone who wants a bigger, easier-to-read print

Licence: personal and classroom use. Please don't resell or re-upload the files.

AI disclosure

The puzzles are created and verified by deterministic computer algorithms (procedural generation and exact solvers), not by generative AI. The written instructions, README and this description were drafted with AI assistance and reviewed by me. The generator and solver code was written with AI coding assistance.

FAQ

Is every puzzle really solvable with one answer?

Yes. Each puzzle was checked by the generator's solver and then by an independent SAT solver, which proves no second solution exists. See VERIFICATION.txt in the ZIP.

Do I need to guess?

No. Nonograms are all solvable line by line. X-Sudoku are graded by the logic they need, and even "hard" ones avoid trial and error. Sum Cross puzzles have unique solutions, but the larger hard grids may need some careful case-checking.

What is "Sum Cross"?

It is a cross-sum puzzle. Each clue is the total of the white run beside it (across) or below it (down), and digits 1–9 can't repeat within a run.

What is X-Sudoku?

It is sudoku with one extra rule: both long diagonals (shaded) must also contain 1–9 once each.

Which file should I print?

Puzzles is the standard edition: two puzzles per page for most puzzles, and one per page for big nonograms. Large Print has one puzzle per page with bigger digits. Both come in Letter and A4. Print at 100%.

Is there a sample?

Yes. The free 6-puzzle sampler has two of each type, with answers.

Can I use these in my classroom?

Yes. You may print copies for your own students. Please don't post the files on shared drives or resource sites.

Try it first: the free 6-puzzle sampler (two of each puzzle type, with answers) is here: https://payhip.com/b/1ouag