DWG-101.3.04
Sudoku #4 · Hard
Your progress on this sheet is saved in this browser. Solve it to get a Next puzzle button.
About this puzzle
Sheet #4 starts with 28 givens. Our solver completes it in 54 forced placements, 98% of them singles. Hardest step: Naked pair.
Beyond singles, the solution path uses Naked pair ×1.
The givens are spread unevenly: box 1 holds 4 of them, box 5 only 0 (boxes are counted left to right, top to bottom).
Digit 8 is given most often, 5 times; digit 2 only once.
Where to start
Watch for two cells in one unit with the same two candidates: they claim those digits for themselves.