Put your number skills to the test with Prime Sudoku, a classic logic puzzle that rewards patience and careful thinking. Each grid offers a fresh challenge as you work toward a complete solution, one number at a time. Choose a difficulty that suits your experience and enjoy a puzzle session at your own pace. Whether you are a Sudoku beginner or a regular fan, there is always another grid to solve. Pick your challenge and give your brain a workout!
FILL EVERY CELL WITH LOGIC
Prime Sudoku applies the classic Sudoku puzzle rules to a standard grid of squares. A Sudoku board consists of a large 9x9 grid, divided into 9 3x3 square regions (each region containing 9 smaller squares). You need to fill in all the remaining blank spaces on the board with the digits from 1 to 9, based on some initial number clues. Choose a difficulty level (easy, medium, hard, or expert) before starting a puzzle. Select an empty cell, then choose a number from the on-screen number pad to fill it. If you make a mistake, use the erase button to clear the entry. Work through the grid carefully until every cell contains the correct number.
Three Core Laws
- Row rule: Each digit from 1 to 9 can only appear once in the same horizontal row.
- Column rule: Each digit from 1 to 9 can only appear once in the same vertical column.
- Area rule: Each digit from 1 to 9 can only appear once in each 3x3 square area.
