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