All Sudoku Variants
10×10 · Size Variant

Sudoku 10×10

A 10×10 grid with 2×5 boxes using the digits 1–10 (often 0–9).

1 2 3 4 5 6 7 8 9

An example 10×10 Sudoku: ten symbols fill every row, column and 2×5 box (a few 1–9 shown).

10×10 Sudoku is a ten-by-ten grid divided into 2×5 boxes, filled with ten different values — usually the digits 1–10 or 0–9. Each row, column and box must hold every value once. It is a gentle large format, only a step up from the 9×9 in size.

The rule: ten values in every row, column and 2×5 box

Fill the grid so no value repeats in any row, any column or any 2×5 box (two cells tall, five wide). One box holds a complete set — below, a 2×5 box is filled with 1 through 10.

1 2 3 4 5 6 7 8 9 10

One 2×5 box holds all ten values (1–10). The full grid has ten such boxes.

Wide boxes, familiar logic

A 2×5 box spans five columns but only two rows, so — as in the 6×6 and 8×8 — column scanning tends to be a shade more powerful than row scanning. Beyond that, everything is ordinary Sudoku at a slightly larger scale: the same singles, pairs and fish patterns all apply.

Numbers or 0–9

Two labelling schemes are common. Using 1–10 is clear but makes the "10" cell two characters wide; using 0–9 keeps every cell to a single digit. Either way the puzzle is the same — ten distinct symbols, one of each per row, column and box.

Solving strategy

  • Scan columns first. The wide 2×5 boxes make column eliminations effective.
  • Complete near-full units. A unit with nine of its ten values gives the tenth for free.
  • Pencil-mark carefully. Ten candidates per cell is more to track than the 9×9's nine.
  • Use the same techniques as 9×9. Every method scales up unchanged.

Common mistakes

  • Expecting square boxes. The boxes are 2×5 rectangles — check the borders first.
  • Mixing the schemes. Decide whether the grid uses 1–10 or 0–9 and stick with it.
  • Forgetting a value. All ten must appear in each unit.
  • Rushing. The extra size rewards steady, careful work.

Can I play it here?

Not yet — Sudoku 10×10 isn't one of the puzzle types SudokuStreak generates for now. But you can learn its rules above, and there's plenty here to sink your teeth into meanwhile: