Many people have asked me for step-by-step Sudoku directions for solving XY-Wing example number 1.
If you have been puzzled about how I solved this puzzle, read this article.
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
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.