Sudoku Deluxe

A full 9x9 grid waits in Sudoku Deluxe. Four difficulty settings shape the puzzle from easy boards with more given digits to hard layouts with fewer clues. Nine smaller 3x3 boxes divide the square, and all 81 cells must end up filled with digits from 1 through 9.

How to play?

Fill an empty cell with a number, then compare it with the surrounding row, column, and 3x3 box. Repeat across the board until no spaces remain. Use marks to note possible digits before placing a final choice. A timer tracks how long the attempt lasts. No full error check runs in the background. Warnings appear only for major rule breaks, including repeated digits placed two or more times in one row, one column, or one mini square.