User Manual

User interface of Sudoku Rax

1. General

Sudoku Rax is a freeware MS Windows program for playing the number puzzle Sudoku.

Features:

·         Enter and edit puzzles with the mouse and/ or keyboard,

·         Display the puzzle in varying size (small to full screen),

·         Generate random puzzles with different difficulty levels,

·         Load and save puzzles from/ to disk,

·         Print a puzzle on a Windows OS printer,

·         Help for solving puzzles with hints in varying depth (showing legal digits, fields with only 1 or 2 legal digits, illegal fields, …)

·         Undo/ Redo function for tried digits

·         Accept/ clear "tried" digits

·         Support for solving puzzles with "scratch digits" (markers for legal digits in a field)

·         Statistic windows

·         Help (general help file, status bar, tool tips, …)

2. Rules of Sudoku

The Soduku square board (grid) consists of  9 x 9 = 81 fields which can be seen as 9 columns , 9 rows and 9 3 x 3 sub squares ("F9 region"). The aim of the game is to put a digit between 1 and 9 in each empty field of the board with the condition that every row, column and F9 region contains no double entry. In other words every row, column and  F9 region must contain the digits 1, 2, 3, 4, 5, 6, 7, 8 and 9, no number missing and no number twice.
The game starts with a board ("puzzle") with certain fields containing "fixed" digits, called "givens". The player has to solve the puzzle by filling the empty fields, obeying the above defined rule, until the board is fully

3. User Interface

Sudoku Rax consists of 6 windows

1.      Main window
- displays the Sudoku panel, the main menu, a toolbar and a status bar  

2.      Options window
- dialog window for entering options like difficulty level, …

3.      Statistic window
- displays statistic data of the current puzzle

4.      General help window
- shows general help information (this file)

5.      Registration window
 - displays copy right info and is for input of the registration key code for Sudoku Rax

6.      About window
- displays author and version info and state of registration

System Requirements

Sudoku Rax runs on Personal computer with MS Windows (XP, .., Windows 10)  and uses the .NET runtime environment.

Main memory demand appr. 500 kB. Processor speed > 500 MHz recommended. Hard disk space requirement approximately 2 MByte.