4Sudoku is a number placement game which requires great patience and a good logical thinking ability! The aim of the game is to place a numerical digit 1-9 in each cell of the 9x9 grid so that each row column and 3x3 block contain only one instance of each number.
The program features a true Sudoku Generator, unlike many which simply rotate and flip a generic set of puzzles. Puzzles are generated to match your skill level. We have also added a comprehensive hint system which helps you learn some of the more difficult moves.
The pen and eraser mode allows you to draw directly onto the play area . This is useful for making notes or working out your next moves.
Key features of the game include:
* 5 levels of difficulty
* Comprehensive hint system
* Brute force & logic solvers
* Pen and eraser scribble mode
* Editable candidate lists
* X-Wings variations & swordfish etc.
* Coloring & forcing chains
* Clock start, stop and reset
* Load and save your progress
* Snapshot and restore facility
* Import and export SDK text files
* Square screen aware
