In this advanced Sudoku strategy tips and tricks tutorial is an example of how to use the X Wing technique to solve very hard Sudoku puzzles. If you would like a tutorial on how to start a Sudoku and the Sudoku basic rules, please check out my previous post: Step by Step How to Solve Sudoku – Sudoku Tips and Rules. Also if you would like to know what the X wing advanced Sudoku strategy is, you may also want to check out my previous post: An Introduction to the X Wing Advanced Sudoku Strategy. However, in this Sudoku tutorial you will see an example of a Sudoku puzzle where you can use the X wing strategy, and this example uses the column variation of the X wing technique. Continue reading →