Sudoku Solver
Solve Sudoku puzzles and get optional hints.
Solve entered Sudoku puzzles, generate fresh grids, and mark cells with colors to pull out geocaching codes from the solved values.
Board
Instructions
- Hit the Clear button and enter the Sudoku givens manually. You can click a cell, use the keyboard arrow keys, then type 1 to 9. Delete or 0 clears a cell.
- When you are finished, hit Load. The givens will appear in blue.
- Reset removes user-entered values and returns to the original givens.
- Generate creates a new puzzle at the selected difficulty and loads it as givens.
- Choose a color, then click cells to mark them. The extracted digits show in row order by color, using solved values for empty cells when a solution is available.
- Allowed digits are shown as small light gray digits in each cell. Show allowed toggles them.
- Singles are highlighted in red. Show singles toggles those hints.
- Accept converts singles to actual entered digits.
- Hint fills in the current selected cell with the correct digit.
- Clicking a filled cell highlights the same digit elsewhere in red.
- Solve solves the entire puzzle, Undo reverses the last user action where supported, and PNG/Print export the current colored board.