Sudoku Challenge

Daily grids and long practice sets fill the Sudoku Challenge. Single-player play covers the whole package, with a guided lesson path for first-time solvers and several rule-based modes for people who already know the puzzle. Ten tutorial rounds teach the basics from scratch. After that, pick from Level of the Day, Fast, Classic 1, Classic 2, Challenging, plus two beginner-friendly sets named Simple 1 and Simple 2. Puzzle batches come in groups of 10, 15, or 20. Finished boards pay out coins. The shop spends that currency on help during a match, including extra time, a random digit, a golden digit, and an SOS option.

How to play?

Fill empty squares with digits, placing each number only once within its column, row, or block. Larger boards are split into sectors. The rule stays the same inside every section. A selected square highlights its row and column. On 6x6 boards, the sections use rectangles. On 9x9 boards, the sections use squares. Board layouts change shape across modes. Repeated digits still break the rule. Finish boards, earn more coins, buy assistance, and move through the full set of modes.