Fill the 9 x 9 grid so every row, column, and 3 x 3 box contains each number from 1 through 9 exactly once.

• Choose a cell:Click or tap an empty square, then use the number pad or keyboard to enter a digit.
• Use notes:Turn on Notes when you want to mark possible numbers without making a final move.
• Avoid misses:Wrong entries count as mistakes. Too many mistakes lock the puzzle, so start a new one and try again.
• Win condition:Complete every open square with the correct number.