DWG-101.3.03
Sudoku #3 · Hard
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About this puzzle
Sheet #3 starts with 28 givens. Our solver completes it in 56 forced placements, 95% of them singles. Hardest step: Box–line reduction.
Beyond singles, the solution path uses Pointing pair ×2, Box–line reduction ×1.
The givens are spread unevenly: box 4 holds 5 of them, box 3 only 1 (boxes are counted left to right, top to bottom).
Digit 2 is given most often, 5 times; digit 6 only once.
Where to start
A row or column will confine a digit to one box. Remove it from the other cells of that box.