DWG-101.4.11
Sudoku #11 · Expert
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About this puzzle
Sheet #11 starts with 28 givens. Our solver completes it in 58 forced placements, 91% of them singles. Hardest step: XY-Wing.
Beyond singles, the solution path uses Pointing pair ×2, X-Wing ×1, XY-Wing ×2.
The givens are spread unevenly: box 3 holds 4 of them, box 4 only 2 (boxes are counted left to right, top to bottom).
Digit 6 is given most often, 6 times; digit 5 only once.
Row 5 starts completely empty.
Where to start
Find a pivot cell with candidates XY that sees one cell with XZ and another with YZ. Any cell that sees both wings cannot be Z.