Mirrored from **Sudopedia**, the Free Sudoku Reference Guide

# X-Wing

An **X-Wing** is a fish pattern involving 2 rows and 2 columns.

It is a single-digit solving technique that allows the player to eliminate candidates.

## Example

Try to find an X-Wing; page down to see the Solution.

It is in rows 1 and 4.

Make sure that both rows contain only 2 candidates each and that these candidates are confined to two columns. In this example, the columns are 2 and 5.

Now we can eliminate the remaining candidates from these two columns.

A total of 9 candidates can be eliminated from these two columns.

## How it works

When 2 Rows contain only 2 candidates each,
and candidates are located in the Same two columns,
you may eliminate all other candidates from these 2 columns.

Example. fish diagram:

There are 2 candidates in row 2 and in row 8, marked **X**. Both candidates are located in the same columns 2 and 8.
All other candidates in these 2 columns, marked with a red asterisk, can be eliminated.

This page was last modified 06:13, 9 January 2009.