East the Beasts

Free Sudoku Generator

Three puzzles to start, easy, medium, and hard. Hit New puzzle on any of them for another one at the same difficulty, generated right in your browser, or print one to solve on paper. Every puzzle has exactly one solution, generated and checked, not just filled in by hand.

Play online instead Build your own puzzle

Rules

How Sudoku works

Sudoku is played on a 9 by 9 grid, split into nine 3 by 3 boxes. Fill every row, every column, and every box with the numbers 1 through 9, each number appearing exactly once in each of the three. A puzzle starts with some cells already filled in, the givens, and a correctly made puzzle has exactly one solution.

Strategy

Five ways to find the next number

Scanning

Pick a number, then check each box, row, and column to see where it can and cannot go, based on where it already appears nearby.

Single candidates

If a cell has only one number left once you eliminate everything already used in its row, column, and box, that is the answer for that cell.

Hidden singles

A number might fit more than one empty cell in a box by elimination alone, but if only one of those cells can hold it once its row and column are considered too, that cell is a hidden single.

Pointing pairs

If a number can only go in cells within a single row or column inside one box, it cannot appear anywhere else in that row or column outside the box, which lets you eliminate it elsewhere.

Work the fullest areas first

Boxes, rows, and columns with the most givens have the fewest candidates left to consider, so they usually crack first.

Generate, print, or solve

Three difficulties

New puzzle generates a fresh one at the same difficulty, right in your browser, with the same uniqueness check the original three passed. Print prints only that one grid, not the whole page.

Easy

38 starting numbers

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

Don't want to print? We already did. Just Sudoku: seven volumes, up to 2,400 puzzles each, on Amazon now.

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

Medium

30 starting numbers

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

Don't want to print? We already did. Just Sudoku: seven volumes, up to 2,400 puzzles each, on Amazon now.

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

Hard

24 starting numbers

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

Don't want to print? We already did. Just Sudoku: seven volumes, up to 2,400 puzzles each, on Amazon now.

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

Want a lot more without printing more of these? Just Sudoku has seven volumes, up to 2,400 puzzles each, solutions included in every one.

See Just Sudoku