Tutorial # 42. the XYZ wing in a sudoku puzzle.Wow! Hard to spot.

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This is important for those who speak another language.
Steps to spot an XYZ wing:
1 Look for a cell with 3 small numbers Call it X
2 Locate a cell in the same block of the 3 small numbers which has 2 of the small numbers in the the X cell Call it Y
3 Locate another cell in the same row or column of the X cell which has 2 of the numbers in the X cell. Call it Z
4 You can remove any other number within the same block as the X cell in the same row or column which is not part of the XYZ wing cells.

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Видео Tutorial # 42. the XYZ wing in a sudoku puzzle.Wow! Hard to spot. канала Sudoku Guy