Sleuthy

Sleuthy is a murder sudoku: a logic puzzle with a crime story. Every case is a floor plan with rooms and furniture, a cast of suspects and one victim. As in sudoku, every row and every column holds exactly one person. The clues tell you who sat in the armchair, who could see the staircase and who was in the garden. When the grid holds, the killer is the one person left alone with the victim.

Every case has exactly one solution and can be solved by deduction alone, no guessing. Tap any clue to see exactly what it means, and use tips that point you in the right direction before they give anything away.

56 cases are free: a 4×4 tutorial followed by 50 cases from 6×6 up to 12×12. Two themed packs of 40 cases each are one-time purchases. No ads, no subscriptions, no account, and it works fully offline. Available in English, German, French, Spanish, Italian, Portuguese and Dutch.