Mastiff leaps into the sudoku craze.

Got brains? Concentration? Then you have all you need to solve a sudoku puzzle. Simply fill in the missing numbers in a 9x9 grid. No calculation or special math skills necessary. Be warned, though: Once you start, you'll find why millions around the world have become sudoku addicts!

Dr. Sudoku features one thousand puzzles hand crafted by Skynet Corporation of Japan, a leading developer of Sudoku puzzles, a built-in help, tutorial and memo system. And perhaps best of all, a mode that lets you create and edit your own Sudoku puzzles or input puzzles from other sources. Should you need a hand, you can ask Dr. Sudoku for hints, and to verify that a puzzle even is solvable.

1,000 puzzles from Skynet Corp. of Japan, a leading developer of Sudoku puzzles

Tutorial and in-game hints

Create-your-own-puzzle mode