Number Crossword Solver

Number Crossword Solver — Step by Step

Click squares to make the spaces, type any starting digits, and list the numbers in the box under the grid. Then press Solve. Or play a generated puzzle and send it here with one click.

Number Crossword Solver: rules, how to use it, tips

Place every number from the list in the grid so the digits match wherever across and down numbers cross.

The rules

The grid has across and down spaces, like a crossword.
You are given every number that goes in, grouped by how many digits it has.
Each number goes in exactly one space of its length, reading left to right or top to bottom.
Where two numbers cross they share a digit, which must match. Given digits cannot be changed.

Using the solver

Choose a grid size, click squares to make the white spaces, and type the list of numbers (or press Sample).
Press Solve: spaces where only one number fits, numbers that fit only one space, and what-ifs, one at a time.

Tips

Count by length. If there is only one 7-digit number and one 7-digit space, it goes there.
Use the givens. A space with a digit already in place rules out every number that doesn’t have that digit there.
Follow the crossings. Each number you place puts digits into the spaces that cross it — check those next.
Number in one place. Sometimes a number fits only one of the spaces of its length; place it.

The full guide, with a worked example and common mistakes: How to play Number Crossword.

Questions

Is there always one answer?

Yes — every puzzle is checked, and given digits are added only where needed to make the answer unique.

How is this different from Cross Numbers?

In Cross Numbers each answer comes from a maths clue. Here you get the list of numbers and must work out where they go.

How do I solve one from a magazine?

Open the Number Crossword Solver, draw the grid, type the numbers and press Solve.