Sudoku Solver: Step-by-Step

Understand your next Sudoku move with candidate evidence you can inspect. Play classic and diagonal 9x9 Sudoku offline. Pay once to download; all features are included. No subscriptions, in-app purchases, ads, accounts or tracking. INSPECT THE REASONING Hints progressively reveal a target cell, technique names, recorded deductions and the next placement. Select a deduction to see its candidate snapshot on the board. Related cells are highlighted; removed candidates are crossed out. Each elimination lists the affected cell and candidates before and after it. These previews do not change your notes. The hint engine supports naked singles, hidden singles, naked pairs, hidden pairs, pointing candidates, box-line reduction and X-Wing. A hint may combine several eliminations before reaching a placement. It does not promise a human-style proof for every puzzle. When these techniques cannot…