MINI · 4×4
4×4 Sudoku — a gentle start
The smallest Sudoku variant: place 1–4 once per row, column, and 2×2 box. Perfect for learning the rules, playing with kids, or finishing a round in 1–3 minutes.
Why pick 4×4
- Lowest barrier to entry for first-time Sudoku players
- Finishes in 1–3 minutes — fits short breaks
- Kid-friendly thanks to the 1–4 digit set
- A stepping stone for learning techniques before classic 9×9
Who it's for
If you're new to Sudoku, want something quick during a break, or are introducing the game to kids, start here. Try Easy difficulty first.
4×4 Sudoku rules
Every row, column, and 2×2 box must contain the digits 1 through 4 exactly once. Even on the small board, puzzles are generated and checked for a unique solution.
Today's 4×4
Players on the same UTC date and difficulty receive the same 4×4 puzzle. Because rounds are short, this is the easiest board for building a daily streak.
4×4 solving tips
- When a row or column already has three digits, fill the one missing digit first.
- Check each 2×2 box for its missing numbers to reduce the board quickly.
- At first, say the candidates out loud instead of using notes; it helps the rule click.
Scoring & ranking
4×4 uses the same scoring formula and daily ranking. Zero-hint runs enter Official ranking; runs with hints are separated into Assisted ranking.
Read the solving guide
A detailed guide to patterns and techniques for the 4×4 board.
4×4 complete guide