DWG-101.3.12
Sudoku #12 · Hard
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About this puzzle
Sheet #12 starts with 26 givens. Our solver completes it in 56 forced placements, 98% of them singles. Hardest step: Pointing pair.
Beyond singles, the solution path uses Pointing pair ×1.
The givens are spread unevenly: box 1 holds 3 of them, box 5 only 2 (boxes are counted left to right, top to bottom).
Digit 2 is given most often, 5 times; digit 1 only once.
Row 5 starts completely empty.
Where to start
Somewhere a digit is confined to one row or column inside a box. Use that to clear the digit from the rest of the line.