Fill the grid so every row, column, and box has each number exactly once.
How to play
•Pick a grid size (5×5, 6×6, or 9×9) and difficulty (Easy, Medium, Hard).
•Tap a cell, then tap a number from the keypad to place it.
•Given clues are locked. Wrong placements are highlighted and cost a life.
•Solve 3 puzzles in a row to complete the run.
Controls
Click / TapSelect a cell, then a number
1–9 keysPlace a number in the selected cell
ArrowsMove selection between cells
Backspace / ⌫Erase a cell
Scoring & lives
•+2 per correctly placed number.
•Puzzle-complete bonus scales with grid size and difficulty, plus a speed bonus.
•Hint reveals one cell but costs 3 points.
•You have 3 lives. Each mistake costs one life — lose all three and the run ends.
3 lives this run
Tip:Scan for cells where only one number can legally fit before guessing. On 6×6, remember the sub-box is 2 rows × 3 columns. The 5×5 variant uses row + column rules only (Latin square) — no sub-boxes.