Sudoku rules illustrated
A completed grid highlights a row, a column and a 3×3 box to show the three standard Sudoku constraints.
Y-Wing Sudoku diagram
A clean Y-Wing candidate diagram with highlighted pattern cells and crossed-out eliminations.
How to read this diagram
The pivot r2c2 has exactly {1,2}; its wings r2c7 and r7c2 have exactly {1,3} and {2,3}.
Whichever pivot value is true, one wing must be 3. Remove 3 from r7c7, which sees both wings.
This is a schematic: only the candidates needed for the pattern are shown. It is not a complete playable puzzle.
Image prepared by Sudokumax. Updated .
More to explore
All Sudoku images
X-Wing Sudoku diagram
A candidate diagram shows the four corners of an X-Wing and the sevens it eliminates in the shared columns.
Naked pair Sudoku: before and after
A row-level diagram shows two cells containing only 3 and 7, followed by the candidate eliminations they allow.