How the test works
- The 6×6 grid is split into 2×3 boxes. Some squares already have numbers.
- Fill every empty square so each row, each column and each box has the numbers 1 to 6 exactly once.
- Pick a square, then a number (or type it). A number that clashes with another in the same row, column or box turns red. Turn on Notes to pencil in options.
- Stuck? A hint fills in a square but adds 15 seconds. Your score is your time in seconds, hints included. Lower is better.
What it measures
Sudoku is a logic puzzle: no maths, only reasoning about where each number can go. It trains working memory, concentration and step-by-step problem solving. Every puzzle here is new, has exactly one answer and can be solved by logic alone, without guessing. The 6×6 board is a good step between the mini puzzle and the full 9×9 game.
The step between mini and classic
6×6 Sudoku has six rows, six columns and six boxes of 2×3 squares, with the numbers 1 to 6. The rules are exactly the same as the classic game, but the grid is small enough to scan quickly, which makes it a good puzzle for older children, beginners and anyone who wants a short break.
The boxes are rectangles rather than squares, which catches some players out at first: each box is two rows tall and three columns wide. Look at the thicker lines to see where each box starts.
A strategy to try
Pick a number, say 3, and look at every box in turn. For each box without a 3, cross out the rows and columns that already have a 3. If only one square is left, the 3 goes there. This technique, called cross-hatching, solves most 6×6 puzzles on its own and is the main skill for 9×9 Sudoku too.
What is a good score?
| Score | Faster than about |
|---|---|
| 53 s | 99% of people (top 1%) |
| 84 s | 90% of people (top 10%) |
| 111 s | 75% of people |
| 150 s | 50% of people (average) |
| 203 s | 25% of people |
Estimated from typical scores for this kind of test.
Tips to improve
- Look for a square that only one number can fill, or a number that fits in only one square of a row, column or box.
- Start with the rows, columns and boxes that are nearly full.
- Use Notes for squares with two or three options, and clear them as you go.
- Need a break? Pause stops the clock and hides the board until you come back.
Frequently asked questions
What is a good time for a 6×6 Sudoku?
About 2½ minutes is typical for these puzzles. Under 84 seconds puts you in roughly the top 10%, and under 61 seconds is in the top 2-3%. Each hint adds 15 seconds.
Which size should I play?
4×4 suits young children and first-timers, 6×6 is a good next step, and 9×9 is the classic Sudoku.
Do I need to be good at maths for Sudoku?
No. The numbers are just symbols; you could play with letters or colours. Sudoku is about logic: working out which number can go where.