Free ancient sudoku software for mac

GT Sudoku is a great dashboard widget that follows the following rules:
- Fill in all the squares with 1 - 9.
- The numbers in a row or column 0r 3x3 small group (surrounded by thick lines) must not repeat.
- When there is a greater than sign (>) between two blocks, the numbers on the two blocks must obey the sign.

iPhone Sudoku is a free, open source andnative Sudoku game for your iPhone.
System requirements:
- iPhone

Java Sudoku is a cross platform version of the popular Sudoku logic game. Java Sudoku features an advanced user interface that is both easy to use and appealing to the eye.
It allows you to generate completely random Sudoku puzzles, enter your own puzzles from newspapers and magazines, or load them from Sudoku XML files. Java Sudoku can also be used as a Sudoku generator and solver.
Main features:
- Random puzzles every time you play
- Helping lines mode in the option menu, so You can see easier, if there is a collision
- 2 different systems of selecting cells and entering numbers
- 3 difficulty levels and an user custom level
- 3 Different Numbers Distributions
- Load/Save Sudoku games without any kind of losses
- Design your own puzzles - Under construction.

Python Sudoku is also able to print a Sudoku (1 or 4 sudokus in each page) and write an image (jpeg, png, etc) with a Sudoku.

Sudoku, sometimes spelled Su Doku, is a placement puzzle, also known as Number Place in the United States. The aim of the puzzle is to enter a numeral from 1 through 9 in each cell of a grid, most frequently a 9 x 9 grid made up of 3 x 3 subgrids (called "regions"), starting with various numerals given in some cells (the "givens").

Each row, column and region must contain only one instance of each numeral. Completing the puzzle requires patience and logical ability. Its grid layout is reminiscent of other newspaper puzzles like crosswords and chess problems.

Sudoku initially became popular in Japan in 1986 and attained international popularity in 2005.

mariosudokus only hidden feature is that if you press the option key and then move the mouse pointer over button undo its label changes to replay and you can repeat the game from the beginning.
The level of difficulty of the sudoku is set by the number of revealed tiles you choose from its pop up menu. The more tiles you show the easier the game obviously gets.
You may click on any tile, revealed or empty to change/enter a number 1 to 9 even those revealed automatically and therefore right in my solution. There might be more than 1 solution to a sudoku and I have solved the game in a different way than the one created originally.
You may choose to have row and column highlited for you or a square to help you work out possible numbers.
In assisted mode, when button assist ticked, as you hover over empty tiles they will show you all the possible numbers for that spot, one at a time. Possible numbers are those not in that column, row or square only. Your cursor will be hidden and the tile will change colour. When all possible numbers have displayed then the tile will flash, return to its original colour, and the pointer will reappear. As you click on that tile a dialog box is displayed to allow you to enter a number. In that dialog window you are reminded again of all possible numbers for that spot. If there is only 1 possible number for that spot then that number is also entered for you in the text entry field and selected. This helps fast players to just hit enter or return to accept that choice. You may change that number if you wish.
At present you may not work in assisted mode and have rows or square highlited.
Hint gives you one right clue. It shows you a number in a randomly chosen unfilled spot and mariosudoku will remember that you have asked for a hint.
Check reports on how you do, hints auto-solutions and mistakes you are currently making according to my creation of that sudoku. Remember you might still be right and you might be able to solve the sudoku in an alternative way.
Undo and redo are unlimited.
Solve reveals all tiles according to you my solution. (that might not necessarily be yours). Undo returns you to where you were before but mariosudoku will remember that you have auto-solved it.
If you save mariosudoku will create a file called mariosudoku prefs in its folder (directory). mariosudoku will read it at start up and set up accordingly. Remove it and on your next restart youll get back to a default (no tiles revealed) screen. Save and another file will be written.
Should a box pop up saying something went wrong, please type what you were doing when it happened in the main field and either email it to me from the provided button or save it to disk and email it to me later at the address below. Quit mariosudoku and then restart it.
You will be contributing to make a better mariosudoku.
Thanks for trying it and for all your help!
Enhancements:
To upgrade any version trash the previous version and use the current one.
New/Changed things in this version:
- Tiles always revert to original state (white) when the mouse is moved out of them
- Save now works properly and added menu File:Save to allow for user wanting to save manually when game is created but before it is started
- Added menu File:revert to saved to quickly restart game from last save. Revert to saved differs from Replay this sudoku which restarts the game from scratch.
- Changed some shortcut command keys in menu items.
- PS I should be able to start work on vers a.0.0.5 in 4 weeks time.

sudokumat is a nice tool that allows create and solve sudokus of different levels of difficulty.
It is possible to create your own "pdf-sudoku-book" with as many sudokus as you want.
Sudokumat solves every sudoku within milliseconds.
Main features:
- Generate Sudoku
- In different levels of difficulty - whereby the metric still has to be improved
- Solve Sudoku
- Support in playing Sudoku
- Easy input: no Click - just go to the desired field using mouse or keyboard and type in your desired digit
- Set/Unset/Show candidates
- Support of multiple Undo / Redo
- Display of a tracker that highlights all relevant fields for application of the Sudoku rules (row, column, 3x3-cell)
- Show all permitted positions for a given digit
- Show an appropriate field to be solved next
- Solve a single step
- Toolbar for the most important functions of Sudokumat
- Create PDF-files with as many Sudokus as you want. The difficulty can be adjusted. Solutions can optionally be included.
- Save of single puzzles in flat text files
- Restore of single puzzles from previously saved text files
- Language support for German and English - depending on your system settings (default-locale) and choosable from Options ? Select Language
- Help too is available in German and English