Sudoku.com’s solver dumps the finished grid. Ours walks the next logical move and tells you why — naked single, hidden single, then a unique-solution fill if the human techniques run out. Use it to learn, not to skip the puzzle.
Everything runs in your browser. We first look for a naked single (one candidate left in a cell) or a hidden single (a digit that can live in only one cell of a house). If the puzzle is uniquely solvable but those run out, the next fill comes from the unique solution — labelled Reveal — so you can see where the logic jumped.
If the clues conflict, or if two different completions exist, the solver stops and says so. A proper Sudoku has exactly one answer.