How to Play Sudoku
Goal: Fill the 9x9 grid with numbers 1-9.
Rules: Each row, column, and 3x3 box must contain all digits from 1 to 9 without repetition.
Click a cell to select it, then click a number to place it.
Notes Mode: Toggle to add small pencil marks for possible numbers.
Sudoku Tips
Start with rows, columns, or boxes that have the most numbers filled in.
Use the Notes feature to track possible numbers for tricky cells.
Look for "naked singles" - cells where only one number can fit.
Scan for "hidden singles" - numbers that can only go in one place in a row/column/box.