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Master Detective
Solve the logic grid
Use the clues to solve the grid.
Master Detective
Toggle cells: blank → ✓ → ✕.
Reset
New case
Instructions
Notes
Instructions
✕
Click a cell to cycle through blank → ✓ → ✕.
Use the clues to deduce the correct matches.
Notes
✕
When a row has one ✓, all other cells in the row and column must be ✕.