Sudoku Directions For Solving XY-Wing

Many people have asked me for step-by-step Sudoku directions for solving XY-Wing example number 1.

It seems that some people have found it difficult to get to the starting point to apply the XY-Wing technique as shown in the graphic. Here is one way to arrive at the starting point.

Sudoku Directions

 Cell Action Reason or Pattern R7C7 Enter a 3 Naked Single R7C9 Enter a 4 Naked Single R1C9 Enter a 6 Hidden Single R2C5 Enter a 6 Hidden Single R2C2 Enter a 5 Hidden Single R2C1 Enter a 4 Hidden Single R9C2 Enter a 4 Hidden Single R4C5 Enter a 3 Hidden Single R4C4 Enter a 5 Hidden Single R1C4 Enter a 8 Naked Single R1C6 Enter a 4 Naked Single R1C5 Enter a 5 Naked Single R5C5 Enter a 4 Hidden Single R6C5 Enter a 7 Hidden Single R6C9 Enter a 5 Naked Single R9C8 Enter a 5 Hidden Single R6C4 Enter a 2 Hidden Single R5C4 Enter a 9 Naked Single R9C4 Enter a 6 Naked Single R9C6 Enter a 9 Hidden Single R9C9 Enter a 7 Naked Single R5C9 Enter a 3 Naked Single R8C9 Enter a 9 Naked Single R8C3 Enter a 7 Hidden Single R8C2 Enter a 6 Hidden Single R9C7 Remove the 8 Naked Pair (3,8) in R9C1, R9C3 R1C7, R1C8 Remove all the 2s Locked Candidates (2) in R1C1, R1C2 R4C1, R5C1, R6C3 Remove all the 8s Locked Candidates (8) in Column 2 (R4C2, R5C2)

Now we have arrived at the starting point to apply the XY-Wing technique as explained in my article "Sudoku XY-Wing Solves Difficult Sudoku Puzzles".

From this point onward, you can follow the remaining steps discussed in the article.

If you have difficulty identifying and solving Sudoku XY-wing, I recommend buying the Sudoku Solving Techniques video. This video covers the Sudoku techniques to solve Sudoku including XY-Wing. Read my review and see for yourself.