DWG-101.4.06
Sudoku #6 · Expert
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About this puzzle
Sheet #6 starts with 28 givens. Our solver completes it in 64 forced placements, 83% of them singles. Hardest step: XYZ-Wing.
Beyond singles, the solution path uses Pointing pair ×5, Box–line reduction ×3, Naked pair ×1, XY-Wing ×1, XYZ-Wing ×1.
The givens are spread unevenly: box 1 holds 4 of them, box 3 only 2 (boxes are counted left to right, top to bottom).
Digit 5 is given most often, 5 times; digit 1 only 2 times.
Where to start
Like the XY-Wing, but the pivot holds all three candidates XYZ. Z can be removed from cells that see the pivot and both wings.