DWG-101.3.01
Sudoku #1 · Hard
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About this puzzle
Sheet #1 starts with 28 givens. Our solver completes it in 56 forced placements, 95% of them singles. Hardest step: Pointing pair.
Beyond singles, the solution path uses Pointing pair ×3.
The givens are spread unevenly: box 5 holds 6 of them, box 1 only 1 (boxes are counted left to right, top to bottom).
Digit 6 is given most often, 5 times; digit 3 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.