Learn with a reason for each move
Try the single and pair practice examples to explain a deduction before applying it. Use Fill notes if you want the game to list the candidates allowed by your current entries. Those notes are a starting point for reasoning, not a list of guaranteed answers.
Very easy Sudoku for beginners
These easy puzzles use the standard 9 × 9 rules; they are not a smaller game. Start by scanning nearly complete units for singles. If nine digits feel like too much at first, try 4 × 4 mini Sudoku. For paper practice, choose Easy and Include answers on the printable Sudoku tool.
A strategy for easy puzzles
Start with a row, column or box that is almost complete. Work out which numbers are missing before you enter one.
What makes these puzzles easy
Every easy Sudoku here can be finished with naked and hidden singles alone: at each step at least one cell has a single possible number, or a number has a single possible cell. You never need to guess or track long chains of notes.
A routine for each move
Pick a number, say 1. Look at every box that does not contain a 1 yet and rule out cells whose row or column already holds one. When only one cell remains, place it. Repeat for 2 to 9, then go round again.
Use the tools at your own pace
Notes record possibilities. Undo reverses your last change, one move at a time. Fill notes lists candidates from your current entries; Redo restores an undone move. Restart replays the same starting puzzle. A hint explains a step before placing a number. Pause hides the grid and stops the timer, and your game is saved on this device so you can come back later.
When to try medium
If you finish easy puzzles without hints and rarely need notes, move to medium Sudoku. The rules stay the same; you will start using notes to spot where a number is locked into one row or column. The beginner guide is there if you want a refresher first.
Ready for another puzzle?
Choose New puzzle to start again, or visit the daily challenge for a puzzle that stays the same throughout the day. Prefer paper? Make a printable Sudoku sheet at the same level.
A few helpful answers
Yes. The game works in your browser. Progress is saved on this device when local storage is available.
Turn Notes on, select an empty cell, then choose numbers to add or remove pencil marks. Turn Notes off to enter a final number.
Yes. Every puzzle has exactly one solution, and our step-by-step solver finished each one using logical techniques before it was published.
With Auto-check on, a number that does not fit the finished grid gets a red outline and is counted as a mistake. There is no game over. Turn Auto-check off in the settings if you prefer to find errors yourself.
Yes. Use the arrow keys to move, type 1 to 9 to enter a number, press Backspace or Delete to erase, N to switch Notes on or off and U to undo.