4×4 Sudoku
Each row, column and 2×2 box must contain numbers 1-4
Play and generate printable sudoku puzzles in your browser.
Time00:00
Moves0
Errors0
Rules
- Fill numbers 1–4 into the 4×4 grid.
- Each row, column, and each thick-bordered 2×2 box must contain 1 to 4 exactly once with no duplicates.
- Grey numbers are fixed clues and cannot be modified; green numbers are your entries. Wrong numbers will be highlighted in red.
Controls
- Click a cell to select it, then tap 1–4 below to fill it. Tap Erase to clear the selected cell, tap Hint to fill one correct number automatically.
- Keyboard: Press number keys 1–4 to input, arrow keys to navigate, Backspace / Delete to erase.
- The small text below each digit shows how many remaining slots are available for that number.
Difficulty
- Easy: More given clues, good for beginners; Normal: Fewer clues; Hard: Most empty cells, requires logical reasoning.
- Each puzzle is randomly generated and guaranteed to have only one valid solution.