Game technique · Sudoku
Y-Wing (XY-Wing) in Sudoku
A two-candidate pivot sees two two-candidate wings. The wings share a third digit that one of them must contain.
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A two-candidate pivot sees two two-candidate wings. The wings share a third digit that one of them must contain.
Example
Remove that shared digit from any cell that sees both wings.
Video guide
Key point
A two-candidate pivot sees two two-candidate wings. The wings share a third digit that one of them must contain.