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Free Number Blocks generator, with the answer

Pick a size and generate a Number Blocks, then print it with its answer. Every puzzle has one solution, with no sign-up and no watermark. It runs on the same engine as our KDP Publisher Studio.

Larger grids with fewer givens are harder. Every puzzle has one solution.

6×6 grid. Fill each block with 1 to its size; no two equal digits may touch, even diagonally.

Two pages: the puzzle and its answer. Every puzzle has one solution, checked by the same engine as our KDP studio.

Want the whole book?

This makes one puzzle. Sign up to turn it into a full Number Blocks book for Amazon KDP: hundreds of graded puzzles at any trim, as print-ready PDFs.

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Preview

How to make a Number Blocks puzzle

  1. 1Pick a difficulty. Choose a grid size. Larger grids give the logic more room, so they take longer to solve.
  2. 2Generate the puzzle. Press Generate puzzle. You get a fresh grid, proved to have exactly one solution.
  3. 3Print the two pages. Press Print / save PDF. You get two pages: the puzzle on page one and its answer on page two.

How to solve number blocks

Fill each outlined block of k cells with the numbers 1 to k, and never let two equal digits touch, even diagonally.

The method

  1. 1Size each block. A block of three cells holds 1, 2, 3; a block of five holds 1 to 5. Count the cells to know its digits.
  2. 2Place the givens. Start from the printed digits and the small blocks, where there are fewest choices.
  3. 3Watch the neighbours. A digit blocks that same digit from all eight surrounding cells, so a placed number rules out its neighbours.
  4. 4Work block by block. Fill a block with its missing digits so none clashes with a touching cell, then move to the next.
The one rule
Each block holds 1 to its size, and equal digits never touch.
What the answer page shows
The completed grid is printed at the back.
How the grades differ
Bigger grids and fewer givens mean more to deduce.
Good for
Solvers who like a compact, quick logic grid.

Publishing a whole book?

This tool makes one puzzle for home or the classroom. To make a Number Blocks book you can sell on Amazon KDP, Publisher Studio generates hundreds of graded puzzles across a difficulty curve, at any KDP trim, as a print-ready interior and solutions PDF.

See the KDP Number Blocks maker

Questions

What is Number Blocks?
Number Blocks (also called Suguru) divides the grid into outlined blocks: a block of k cells is filled with 1 to k, and no two equal digits may touch, even diagonally.
Is this Number Blocks generator free?
Yes. Pick a difficulty, generate a puzzle and print it with its answer, with no sign-up and no watermark. It is free for classroom, home and personal use.
Does every puzzle have one solution?
Yes. Every puzzle is generated and checked by the same solver our Publisher Studio uses, so the clues fix exactly one solution. A puzzle is never ambiguous or unsolvable.
Does it include the answer?
Yes. Every puzzle prints as two pages: the puzzle on page one and its answer on page two, so you can check your work.
What size are the pages?
The free tool prints at 8.25 by 11 inches, a popular large-print size. Our Publisher Studio will export the same book at any KDP trim, from 5.06 by 7.81 up to 8.27 by 11.69, as a print-ready 300 DPI interior.

Short of ideas? Browse our ready-made printables for this puzzle and print one today.

Make a Number Blocks book to sell on KDP

Hundreds of graded puzzles, any KDP trim, print-ready PDFs. Start free.

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