Number puzzle

Sudoku Studio.

One number at a time. Everything in its place.

Preparing your game…

Enable JavaScript to play. Your game saves stay in this browser.How to playChoose a square, then a digit below or type 1–9. Arrow keys move; Delete clears. N toggles notes.

Fill each row, column and 3 × 3 box with 1–9 exactly once. Starting digits cannot change.

Choose a square and a number. Notes toggle small candidate digits; entering a value clears its notes and removes that candidate from peers.

Conflicting entries are marked. Check compares entries with the unique solution; Hint fills the selected empty or incorrect square. Both are free.

Three verified puzzle patterns are varied by seed and digit permutation. This is a small prototype puzzle set.