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  • Caseoku: Murder Sudoku Mystery screenshot 1
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  • Caseoku: Murder Sudoku Mystery screenshot 5
  • Caseoku: Murder Sudoku Mystery screenshot 6
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  • Caseoku: Murder Sudoku Mystery screenshot 8

About Caseoku: Murder Sudoku Mystery

🕵️‍♂️ Case File #1: The investigation begins. Can you identify the killer?

Caseoku is a daily murder mystery sudoku — the definitive logic challenge for aspiring detectives and puzzle lovers. Forget about guessing: in this crime scene, only pure deduction will lead you to the truth.

Every day, a new case is opened. Every player around the world receives the exact same mystery, the same suspects, and the same clues. Will you be the fastest to find the culprit?

HOW TO PLAY
Step into the shoes of a lead investigator. You're presented with a grid representing a crime scene and a series of clues in your detective notebook.
Analyze the Clues: "The victim is not in the Kitchen," "Alice is next to a plant"
Deduce and Rule Out: Use the clues to cross-reference positions and rooms, just like in a classic sudoku grid.
Identify the Killer: There is only one possible solution. Use your logic to fix the suspects in their correct places and solve the crime.

EXPLORE NEW CRIME SCENES
Every update brings a brand-new setting to investigate. Start in the House, then follow the trail to the Street, the Beach and the Forest — each one with its own objects, characters and deduction rules to master. More scenarios keep arriving with every case file.

KEY FEATURES
📅 One Daily Case: A fresh, hand-crafted murder mystery every single day.
🔍 Pure Logic, No Luck: Every puzzle can be solved through careful deduction.
📓 Pro Detective Notebook: log evidence, mark candidates, fix final placements.
🧠 Multiple Difficulty Levels: 6x6 for a quick brain-teaser, 8x8 for expert boards.
🗺️ Multiple Scenarios: House, Street, Beach, Forest and more, each with its own props and rules.
📱 Optimized for Tablet.
☁️ Cloud Sync across devices.

THE CASEOKU CHALLENGE
If you love sudoku, logic grid puzzles, whodunit mysteries or classic riddles like Einstein's, Caseoku's dark investigative twist is for you.

Download Caseoku, the daily murder mystery sudoku, and solve today's case! 🔎

What’s new

Version 4.1.1 · Updated September 19, 2026

🕵️‍♂️ Caseoku Update: One mystery a day. Use logic to solve the case. New Features: - 🏖️🏙️🌲 New Scenarios: Dive into the new beach, street, and forest levels! Discover new locations and objects. - ❌ Mark Cells: New option to mark Xs and erase characters from the grid. - 📅 Daily Case: A new mystery every day. - 💡 Hints: Stuck on a case? Reveal a suspect's position. - 🐛 Bug fixes and text improvements. The investigation continues! 🔎

Play today's Threadline puzzle

Draw one line through every cell, visiting the numbers in order. A free daily puzzle from Fiplay, same board for everyone. It plays right here, no download.

More Threadline and other daily puzzles on Fiplay →

User reviews

Claire Mack
Claire Mack
The way I love this game... the puzzles are thinky; the "easy" ones are actually easy and the "hard" ones are actually hard. You can go all the way back to the first puzzle created, which helped me get hooked, and every day, a new puzzle is available. I paid for the no-ad upgrade, not because the ads were annoying b...

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