Get the only solution to the newdoku puzzles by thinking logically without guessing.
Sudoku (数独 , digit-single) is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution.
Each step is saved automatically. If you feel you've made a mistake, click on the "Undo" or "Redo" to return to a certain step and continue. If you click on the "Reset", it will clear all the saved steps and start from the beginning.
"Reset" icon: this will clear all input (pen and pencil marks) displayed in the grid.
The game is auto-saved on exit, so you can come back to continue.
"Pen" mode: You can click on the "Pen" icon to switch between pen and pencil modes.
"Pencil" mode: jot down ideas you have for possible keys. You can click on the "Pencil" icon to switch between pen and pencil modes.