Sudoktor is a Sudoku solving assistant. It helps you to solve and understand Sudoku problems but it can also be used as a Sudoku tool for entering and solving Sudoku puzzles as well as for saving your progress on a puzzle.
Sudoktor is a very compact program with the following features:
- generates valid 9x9 sudoku puzzles
- allows to enter by hand or cut-and-paste standard 9x9 Sudokus
- offers an intuitive and quick entry method
- supports pencil marks, show or hide pencil marks, update pencil marks automatically
- full Undo/Redo
- print puzzle
- offers advanced analysis on demand:
- candidates
- wrong values
- solution
- subsets, grid, chains, ALS...
- etc...
The registration code will be working on any platform (Windows, Pocket PC, Mac or Palm). Upgrades and updates are free.

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