Case file № 001 / iPhone

Solve the case.
One clue per suspect.

Detective Sudoku crosses killer sudoku logic with a murder mystery: place every suspect on the grid, prove every alibi, and close the unsolved case.

App Store dispatchComing soon for iPhoneThe case is still being assembled. No email capture. No tracking.
A stylized Detective Sudoku case board Ada was north of Bram. STUDY HALL LOUNGE A B C D CLUE 04 Ada was north of Bram. ONE SOLUTION VERIFIED

The method

Three facts.
One culprit.

No sums. No guesswork. Just a room plan and a line of truthful suspects.

Place the suspects

Each row and column holds exactly one person. Every placement closes possibilities elsewhere on the board.

Make every clue true

Use rooms, walls, directions and furniture. A suspect may mislead by omission, but never by lying.

Name the murderer

The victim was alone with one other person. Solve the grid; whoever shares that room did it.

Evidence log

A fair mystery leaves a trail.

Every system in Detective Sudoku is designed to make deduction visible. The game knows not only the answer, but why the answer follows.

01 / Explainable hints

A deduction, not a revealed square

Hints name the clue, the suspect and the positions it rules out. You keep control of the investigation.

02 / Verified cases

Exactly one solution

Every case is checked by the same constraint solver that powers the hints. A second solution never reaches your desk.

03 / Seventy-five files

Generated, then graded by logic

Cases vary in layout, clue mix and deduction depth. Difficulty reflects the techniques needed, not a timer.

04 / Off the record

Offline. No ads. No account.

The entire investigation lives on your iPhone. There is no login, no tracking and no interruption between clues.

Field photographs / early build

From first clue to closed file.

These screens show the working build. Final character and furniture artwork is still under investigation.

Detective Sudoku case list showing difficulty groups
Early build
Choose an unsolved case.
An empty Detective Sudoku board with rooms and suspect clues
Early build
Read the room. Place the suspects.
An explainable hint naming the deduction and its clue
Early build
Ask why, not merely where.

Questioning the rules

“Do I ever need to guess?”

No. Each puzzle has one machine-verified solution and a logical path to reach it. When you are stuck, a hint explains the next valid deduction instead of filling a cell for you.

Read every answer →

Final report

Seventy-five cases. Not one loose solution.

App Store dispatchComing soon for iPhoneThe case is still being assembled. No email capture. No tracking.