Dr Tetsuo's warning: "This game is highly addictive! Play at your own risk!"

This is Dr Tetsuo. Dr Tetsuo is doing research on logical thinking and, in the process, is hoping to find some bright minds that excel above others. To achieve this, he has devised a whole multitude of diagram puzzles, called Sudoku, to test those willing to take up his challenge.

Sudoku has been around for decades, but only now has it gained worldwide popularity. The rules are simple, fill in the missing numbers within the diagram with a digit between 1 and 9. However, each row, column, and region (one of nine subgrids within the whole diagram) can contain the digits 1 through 9 only once. You get a few digits already placed within the diagram, called givens, but the rest is up to you.

Dr Tetsuo won't leave you hanging, however. There are several options to help you. You can enter predicted digits, highlight the same digit in a diagram, as well as have your mistake shown to you. Don't worry if you were never good in math. All you need to rely on here is your logic - mathematical knowledge is not required.

As you work your way through his diagrams, Dr Tetsuo will keep track of how well you do. He will note how many diagrams you solve and how long each one takes you. The more diagrams you solve, and the faster you solve them, the more points you'll get. And more points make Dr Tetsuo very happy.

Features:

• Generate an almost limitless number of diagrams
• Play on three difficulty levels
• Create your own diagrams
• Auto-solve any diagram
• Helpful features: tutorial, pencilmarks, show mistake, highlight digits, highlight row and column.
• High scores: points for time and level of difficulty
• Total number of all solved Sudoku is saved in phone's memory