Question 1

How is this different from regular Sudoku?

Accepted Answer

Only the size. A regular board is 9×9 with nine 3×3 boxes and the digits 1 to 9. Mini Sudoku is 6×6 with six 2×3 boxes and the digits 1 to 6. The rule is the same: no digit repeats in a row, column or box.

Question 2

Does every board have one answer?

Accepted Answer

Yes. A board starts as a complete grid, then digits are removed one at a time. After each removal a solver checks that only one answer is still possible; if a second answer appears, the digit goes back.

Question 3

What changes between Easy, Medium and Hard?

Accepted Answer

How many digits you start with: 18 to 20 on Easy, 14 to 16 on Medium and 10 to 12 on Hard, out of 36. The daily board is always Medium.

Question 4

What is a clean solve?

Accepted Answer

Finishing a board without a single conflict: no digit you placed ever repeated in its row, column or box, and no hint had to correct one. Using hints on empty cells doesn't count against it.

Question 5

Where are my streak and best times saved?

Accepted Answer

In your browser's localStorage: your daily streak and fastest daily solve, your fastest free play solve at each difficulty, and the difficulty you played last. They never leave your device.

Question 6

Can I play with a keyboard?

Accepted Answer

Yes. Select a cell, move with the arrow keys, type 1 to 6 to enter a digit and press Backspace or Delete to erase. N switches Notes on and off, and U or Ctrl+Z undoes.