Private, browser-local utility
Sudoku Solver
Solve and classify a user-entered standard 9 by 9 Sudoku without sending the grid anywhere.
The grid stays in memory in this tab.
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Result
Solver and result states
V1 accepts standard 9×9 Sudoku only. It rejects repeated givens in a row, column, or 3×3 box, then uses minimum-remaining-value deterministic backtracking. It searches for a second solution before reporting unique and stops after two solutions. States are SOLVED UNIQUE, MULTIPLE SOLUTIONS, UNSATISFIABLE, INVALID PUZZLE, or SEARCH LIMIT. Search is capped at 2,000,000 nodes.
Sudoku Generator creates puzzles; this page solves grids supplied by the user.