Sudoku XY Wing Explained

Y Wing / XY Wing

XY Wing (sometimes called Y Wing) is another advanced technique for eliminating candidates.

It starts by finding a cell with only two candidates (a bi-value cell) called the pivot.

These 2 candidates are called X and Y.

In our sample - R5C5 is the pivot, X=6 and Y=9.
Sudoku XY Wing

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