Start where the blanks are few
A row, column, or box with only a few spaces left usually gives you the fastest reliable answer.
Sudoku Guide
Sudoku Guide
Sudoku gets easier when you chase certainty instead of trying to guess.
Logic Tips
Track one digit across the whole grid
Pick a number such as 5 and scan every box for its remaining legal positions. New answers often appear quickly.
Skip uncertain spots for now
You do not need to force a guess. Fill the sure cells first and return once the board reveals more.