Case file № 001 / iPhone

Solve the case.
One clue per suspect.

Detective Sudoku combines spatial logic with a murder mystery. Place every suspect, make every truthful clue fit, and let the completed room reveal the culprit.

Examine the rules
  • Over 100 levels + a daily challenge
  • Real, explained hints
  • No ads or account
Evidence AUnique case
verified
The Lobby Clock case nearly solved in Detective Sudoku
Hotel case 08 — every marked position follows from the clues.

01 / The method

Three facts.
One culprit.

No sums and no blind guessing. Read the scene, test every alibi, and follow the consequences.

  1. 01
    Detective notebook with a hand-drawn logic grid

    Place the suspects

    Each row and column holds exactly one person.

  2. 02
    Open evidence folder holding case photographs

    Make every clue true

    Use rooms, walls, directions and furniture.

  3. 03
    Detective handcuffs for the identified murderer

    Name the murderer

    The person alone with the victim is the culprit.

02 / Evidence register

Everything you need
to close the case.

The game records a chain of reasoning, not merely a finished arrangement.

01

Real hints

A hint names the clue and explains the next deduction. It does not hand you the answer or solution.

Explained
02

Exactly one solution

Every case is checked for uniqueness before it reaches the case list.

Confirmed
03

Over 100 levels

Work through more than 100 investigations, plus a new daily challenge every day.

Classified
04

Offline by design

Play without ads, an account, or a network connection.

Private

04 / Questioning the rules

Do I ever need to guess?

No. Each case has one verified solution and a logical path to reach it. When you are stuck, Detective Sudoku explains the next valid deduction instead of filling a position for you.

Read every answer →

05 / Printable cases

Download a free one-page murder Sudoku case with suspects, room clues, deduction notes and an upside-down solution. Eleven investigations are ready in US Letter and A4 formats with no signup.

Browse free printable cases →

06 / Final report

Over 100 levels.
A new challenge every day.

Status
Available on the App Store
Platform
iPhone, iOS 17+
Languages
23
Account
Not required
Examine the rules