Sudoku X-Wing Explained

Many people have asked me how to solve Sudoku X-Wing, which is a very hard Sudoku puzzle pattern to identify and solve.

Here is a step-by-step explanation of how you get to the X-Wing pattern shown. See our article titled Sudoku X-Wing Identification And Solution for more details.

At the left is the puzzle partially solved to the point where an X-wing pattern is the next step to solve before we can complete the puzzle.

Several people have trouble getting to this point, so here are the steps you need to take to reach it. Remember this is only one way to get there, not the only way.

Steps To Get To X-Wing Pattern

 Cell Action Reason or Pattern R1C6 enter a 1 Naked Single R4C6 enter a 3 Hidden Single R4C4 enter a 8 Hidden Single R4C5 enter a 7 Hidden Single R7C5 enter a 9 Naked Single R8C6 enter a 6 Naked Single R3C6 enter a 9 Naked Single R9C4 enter a 7 Naked Single R7C4 enter a 2 Naked Single R9C9 enter a 5 Naked Single R9C2 enter a 6 Naked Single R9C7 enter a 3 Naked Single R2C2 enter a 9 Hidden Single R2C8 enter a 3 Hidden Single R2C9 enter a 8 Hidden Single R6C4 enter a 9 Hidden Single R4C8 enter a 6 Hidden Single R8C7 enter a 9 Hidden Single R1C3 enter a 7 Hidden Single R7C1, R7C3, R7C8 remove the 4s Naked pair 4,7 in R7C2 & R7C7 R7C8 enter a 8 Naked Single R8C3 enter a 8 Hidden Single R2C7 & R3C7 Remove the 5’s Locked Candidates (5) in R4C7 & R5C7 R2C1 & R6C1 Remove 2, 4 & 5s Naked Triple (2,4,5) in R1C1, R4C1, & R8C1

We have now arrived at the X-Wing pattern shown in the graphic. Here is the next step you need to do to solve the X-Wing pattern.

 Cell Action Reason or Pattern R3C3, R3C7, & R4C7 & R7C7 Remove the 4’s X-Wing in R2C3, R2C7, R5C3, & R5C7

You should be able to solve the remaining empty cells. They all contain naked singles.

I hope this article, How to Solve Sudoku X-Wing, has been a help to you.

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