For inquisitive minds

Sudoku.

A little logic, at your own pace.

Easy / 0 filled

Select a square, then choose a number.

1 Starting clue 1 Your number ! Conflict

Your next move

Choose a square on the grid.

Notes let you pencil in possibilities.

Progress saves on this device.

Nine numbers. One place for each.

Nine numbers. One simple rule.

Fill every row, column and 3 × 3 box with the numbers 1 through 9, using each number once.

Keyboard: arrow keys move, 1–9 enter numbers, N toggles notes, Delete or Backspace erases, and Ctrl/⌘ + Z undoes.

Every puzzle has exactly one solution. Difficulty changes the number of starting clues. Progress stays on this device when browser storage is available.

A fresh puzzle.

Choose your difficulty.

Start this puzzle again?

This clears your numbers and notes. The starting clues stay the same.