Help Dakota Jane solve some brain twisters!
Sudoku puzzles come in 4 difficulty levels - easy, medium, hard and expert Sudoku! Perfect for Sudoku beginners and advanced players!

Pencil Mode - Turn on/ off pencil mode as you like.
Highlight Duplicates - to avoid repeating numbers in a row, column and block.
Intelligent Hints - guide you through the numbers when you get stuck
Themes - Choose the theme that makes it easier for your eyes.

More details on the official game page of Grandmaster Sudoku ...