6x6 Sudoku — Play Free Online

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Mistakes
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Score
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Time
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Progress0%
Easy · 6×6 Switch difficulty above ↑
How to play 6x6 Sudoku
Fill each row, column, and 2×3 box with the digits 1 through 6 — each appearing exactly once. The boxes are two rows tall and three columns wide, marked by the thicker lines.
E
Easy
6x6 Sudoku Easy
M
Medium
6x6 Sudoku Medium
H
Hard
6x6 Sudoku Hard

What is 6x6 Sudoku?

6x6 Sudoku is played on a six-by-six grid using the digits 1–6. Every row, every column, and every 2×3 box must contain each digit exactly once. The rules are identical to classic Sudoku — only the size changes. With 36 cells instead of 81, a puzzle takes a few minutes rather than half an hour, which makes the 6×6 grid the natural middle step between 4×4 Mini Sudoku and the full 9×9 game.

The one thing that trips up newcomers is the box shape: unlike the square boxes of 4×4 and 9×9 grids, a 6×6 box is a rectangle — two rows tall, three columns wide. The thick lines after row 2, row 4, and column 3 mark the six boxes. Once your eye adjusts, every technique you know transfers: scanning, elimination, and obvious singles solve the vast majority of 6×6 puzzles.

Teachers and parents love this size for the same reason players do: it is big enough to require real deduction but small enough to finish without frustration. If you are introducing a child to the game, see our Sudoku for Kids guide for a recommended progression. And when hard 6×6 puzzles start to feel routine, you are ready for 9×9 — start with an easy puzzle.

At a Glance

Grid size6×6 — 36 cells
Digits used1–6
Box shape2 rows × 3 columns (six boxes)
Givens — Easy / Medium / Hard~22 / ~18 / ~14
Typical solve time2–7 min

Frequently Asked Questions

What is 6x6 Sudoku?
6x6 Sudoku is a mid-size version of classic Sudoku played on a six-by-six grid with the digits 1–6. Every row, every column, and every 2×3 box must contain each digit exactly once. It sits between 4×4 Mini Sudoku and the full 9×9 grid — the same pure logic, scaled to 36 cells.
Is 6x6 Sudoku easier than 9x9?
Yes, in general. A 6×6 grid has 36 cells instead of 81 and only six candidate digits per cell instead of nine, so each deduction involves less cross-referencing. That said, a hard 6×6 with few given digits can still demand careful elimination — it is easier, not trivial.
How do the 2x3 boxes work in 6x6 Sudoku?
The grid is divided into six rectangular boxes, each 2 rows tall and 3 columns wide. The thick lines after row 2, row 4, and column 3 mark the box boundaries. Just like rows and columns, every box must contain the digits 1, 2, 3, 4, 5, and 6 with no repeats. The rectangular shape is the only difference from the square boxes of 4×4 and 9×9 grids.
Who is 6x6 Sudoku for?
Anyone who finds 4×4 puzzles too quick but is not ready for a full 9×9 grid — it is a favourite stepping stone for kids learning Sudoku, casual players who want a 3–5 minute puzzle, and beginners practising techniques like obvious singles before moving up.
6x6 Sudoku
6x6 Sudoku Easy 6x6 Sudoku Medium 6x6 Sudoku Hard
Also Try
Mini Sudoku (4×4)
The smallest grid — perfect for first-time players.
Classic Sudoku (9×9)
Ready for the full grid? Start with easy 9×9.
Sudoku for Kids
A parent and teacher guide with a 4×4 → 6×6 → 9×9 path.
Learn & Print
Obvious Singles Technique Printable Sudoku All Variants