How to Solve Sudoku When Stuck

Can every Sudoku puzzle be solved without guessing?

The short answer is yes. Every proper Sudoku puzzle can be solved without ever having to make a guess. Another way of thinking about it is that every Sudoku puzzle can be solved logically. Even though it may require highly complicated solving techniques you’re not familiar with.

What is the fastest way to solve a Sudoku puzzle?

Focus on only one part of a square, row, or column rather than worrying about the entire grid all in one go. Slowly work your way up until you fill up all 81 spaces. You can start with a single square, then a row, then a column. Getting rid of all other distractions will help you solve the Sudoku grid much faster.