Solution Method E

Solution Method E is aimed at the elimination of options. The effective solution is only by solving method A.
This solution method has 2 versions.

Solution Method E1 ( "X-Wing - by Row")

Look row by row or an option but in two cells occurs.
If there is another row that matches this rule with the same number and the columns of the cell matches in both cases, then that number in two of these four prevent cells.
This option can be removed from other cells found in the columns.

For example:
In the puzzle are the cells B1, H1, B9 and H9 a so-called chain 9 option of using the above method.
As this option in two of these four cells as well.
This allows the option 9 from the other cells found in the column (column B and column H) are removed.

Solution Method E2 ("X-Wing - by Column")

View column for a column or an option but in two cells occurs.
If another column to this rule with the same number and rows of the cell matches in both cases, then that number in two of these four cells appear.
This option can be removed from other cells found in the rows.

For example:
In the puzzle are the cells A2, I2, A8 and a so-called chain I8 9 option of using the above method.
As this option in two of these four cells as well.
This allows the option 9 from the other cells found in the rows (row two and row eight) are removed.