"Extensive collection of Sudoku puzzles that have up to six difficulty levels."
If you are a big fan of the Japanese puzzle called Sudoku, and wish to improve your skills and master this tricky brain-teaser, then what you need is SudoKoach 2.1. As the name suggests, it is an extensive collection of Sudoku puzzles (those fun puzzles featuring a 9 x 9 box where you have to place the numbers 1 to 9 in each row and column in such a way that they aren't repeated). You have up to six difficulty levels, which makes it perfect for both novices and experts.
For all you novices out there who are new to Sudoku, this SudoKoach 2.1 will teach you how to play Sudoku, learn the basics and then start to take on greater challenges. For experts you can start creating your own puzzles, play them on paper or online, and even publish them yourselves, all in the one program.
When you are trying to solve a Sudoku you will probably reach a point, whatever your level of experience, where you need a lot of time to solve it. SudoKoach 2.1 offers you 36 different strategies to solve these puzzles, and claims that it can solve 99.5% of all Sudokus ever made! You can also use it to check for mistakes if you want to solve the puzzle on your own. You can make the grid larger and therefore easier to see, get hints and tips, undo your moves and even use puzzles from other sources in this program.