DWG-101.1.04
Sudoku #4 · Easy
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About this puzzle
Sheet #4 starts with 40 givens. Our solver completes it in 41 forced placements, 100% of them singles. Hardest step: Hidden single.
Singles carry this grid all the way — no pairs, no patterns.
The givens are spread unevenly: box 2 holds 5 of them, box 1 only 4 (boxes are counted left to right, top to bottom).
Digit 3 is given most often, 8 times; digit 7 only 2 times.
Where to start
Scan one digit at a time across all nine boxes. Every step of this sheet is a digit with only one possible cell in some row, column or box.