Sudoku

How to play

Fill each row, column, and three-by-three box with the digits 1 through 9 exactly once.

• Select an empty cell and enter a digit from 1 to 9.
• Use notes to track candidates that may fit a cell.
• Complete every row, column, and box without repeating a digit.

Strategy tips

• Scan for cells with only one possible candidate.
• Check a number across both its rows and boxes.
• Use notes consistently and remove candidates after every confirmed entry.