Detective desk / Tools
Puzzle tools that explain the next move.
Check a deduction, ask for one useful hint or reveal the complete arrangement only when you choose.
Murder Sudoku Solver
Add separate photos of the board and clues, then request a real hint or deliberately reveal the proposed solution.
02Available nowKiller Sudoku Combination Calculator
Filter valid non-repeating digit combinations for any cage sum and size with mandatory and eliminated digit indicators.
03Available nowInteractive Logic Grid Matrix Solver
Practice 4×4 elimination deduction with checkmarks, cross-outs, and automated transitive rule solving.
04Available nowSudoku Solver From Photo
Photograph a newspaper, magazine or book Sudoku, correct the editable transcription and choose a hint or solution.
05Available nowKiller Sudoku Solver From Photo
Read a printed grid together with cage boundaries and sums, then verify or solve it.
06Available nowSudoku Technique Visualizer
Explore X-Wing, Swordfish, XY-Wing, and subset patterns with color-coded base units and candidate eliminations.