Х-wing - an Advanced Sudoku technique

welcome to the sudoku tutorial brought to you by sudoku.com today we'll talk about quite an advanced sudoku technique called x-wing let's take a look at the two highlighted rows there are two cells in each of them that contain a note of four since fours can't repeat in the same row or column we can safely assume that fours will be placed diagonally either in light blue cells or dark blue cells now let's zoom out and take a look at the columns involved since fours are diagonal there will already be one number four in each of these columns that means that we can't write it again so we can confidently remove four from all the remaining notes of these two columns [Music] now you know how to apply x-wing in sudoku in the next video we'll learn about another advanced technique y-wing

Channel: Sudoku.com

Views: 64,837

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Id: r1G_Bph8jXk

Length: 1min 10sec (70 seconds)

Published: Tue Feb 01 2022