DWG-101.2.12
Sudoku #12 · Medium
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About this puzzle
Sheet #12 starts with 30 givens. Our solver completes it in 51 forced placements, 100% of them singles. Hardest step: Single candidate.
Singles carry this grid all the way — no pairs, no patterns.
The givens are spread unevenly: box 1 holds 5 of them, box 2 only 2 (boxes are counted left to right, top to bottom).
Digit 7 is given most often, 6 times; digit 4 only once.
Where to start
At least once you will need to look at a single cell and rule out eight digits. Notes make that spot obvious.