One per row & column
Place every suspect so no two share a row or a column — the sudoku heart of every case.
🔎 A new case every day
The daily murder sudoku
Someone in this cozy little manor is a murderer. Read the clues, place every suspect on the grid, and unmask them — one fresh murder mystery puzzle every day, solved with pure logic in about five minutes.
Scroll to investigate
The case, in one scroll
Watch a murder get solved
Every Cozy Culprits case works the same way — and every single one has exactly one logical answer.
One body. Six suspects.The victim was found in the Study. Everyone claims innocence.
Cross out the impossible ✕Clues eliminate cells — no two suspects share a row or column, and furniture blocks the floor.
Place every suspect 📍When only one cell remains for someone, lock them in. Logic, never luck.
Whoever shares the victim's room… did it.Case closed. Tomorrow: a fresh murder.
How to play murder sudoku
Four rules. Endless deduction.
If you can play sudoku, you can solve a murder. Read the full guide →
Rooms & walls matter
"Beside" means next door — and walls block it. Furniture blocks a cell; rugs are just floor.
Make every clue fit
Pencil-mark candidates, cross out the impossible, and place suspects until one layout remains.
Unmask the murderer
The suspect sharing the victim's room is guilty. Name them, close the case, keep the streak.
Screenshots
Cozy on the surface. Ruthless logic underneath.
Why detectives stay
Built for the daily ritual
A new case every day
One shared daily murder in Easy, Medium and Hard. Streaks, stats and a countdown to tomorrow's crime.
Provably fair
Every puzzle ships with a solver-proven unique solution. There is always a logical path — never a forced guess.
Offline-first
The daily case is generated on your device from the date. Planes, subways, cabins — the manor travels with you.
Never an ad mid-puzzle
Ads keep it free, but they wait respectfully outside the deduction. Remove them forever for $3.49 — no subscription.
A library of cases
Beyond the daily: a campaign from Rookie to Mastermind across 5×5, 6×6 and 7×7 manors, gardens and ballrooms.
Race the world
Per-difficulty daily leaderboards and a weekly league via Game Center. Share your solve time, spoiler-free.
The suspects
Sixteen regulars. Any of them could do it.
Coming soon
Your first case is almost ready
Cozy Culprits is in final playtesting. Join the waitlist and get exactly one email on launch day — no spam, no spoilers.
Detective's handbook
Guides from the case files
Everything about murder sudoku, daily deduction games and playing smarter — from the people who make one.
Rules
How to Play Murder Sudoku
The complete rules — rows and columns, rooms and walls, clue types, and how the murderer is revealed. With worked examples.
Read the guide → AnsweredIs There a Murdle App?
No official one exists — here's what Murdle fans use on iPhone instead, and how the daily-case ritual translates to mobile.
Read the guide → ExplainerMurder Sudoku vs Killer Sudoku
They share a word, not a game. Cages and arithmetic vs suspects and clues — a clear side-by-side of both variants.
Read the guide → Roundup10 Games Like Murdle
Daily murder-deduction games ranked — web, book and app — for when one case a day simply isn't enough.
Read the guide → Daily ritualThe Best Daily Murder Mystery Games
Wordle built the daily habit; these games gave it a body count. Where to solve a fresh murder every morning.
Read the guide → RoundupGames Like Clues by Sam
Love the daily deduction grid? Seven games with the same "every clue clicks" feeling — including one you can keep in your pocket.
Read the guide → iPhoneBest Murder Mystery Puzzle Games for iPhone
Tested picks for solo sleuthing — free, offline-friendly and ad-respectful — from five-minute dailies to long campaigns.
Read the guide → For Wordle fansDaily Games Like Wordle — for Mystery Fans
Keep the streak, lose the letters: daily puzzles where the answer is a culprit, not a word.
Read the guide →
FAQ
Questions from the interrogation room
What is murder sudoku?
A logic-deduction puzzle on a sudoku-style grid of rooms: place every suspect so no two share a row or column, respect blocked cells and walls, and satisfy every clue. When one arrangement remains, the suspect in the victim's room is the murderer. Learn more →
Is there an official Murdle app?
No — Murdle lives on the web and in books, with no official app. Cozy Culprits is an independent iPhone game built for the same daily murder-deduction ritual, with a provably fair case every day. Learn more →
Is murder sudoku the same as killer sudoku?
No. Killer sudoku adds arithmetic cages to number sudoku. Murder sudoku swaps numbers for suspects and adds a whodunit — clues eliminate arrangements until the murderer is exposed. Learn more →
How do I figure out who the murderer is?
Clue by clue: cross out cells where a suspect can't stand, place them when only one cell remains, repeat. The suspect who ends up sharing the victim's room did it — and there's always exactly one logical answer. Learn more →
Is Cozy Culprits free?
Yes — free to download and play, daily case included. Ads keep the lights on (never mid-puzzle), hints can be earned free daily, and a one-time $3.49 purchase removes ads forever. No subscription, ever.
Do I need an internet connection?
No. Cozy Culprits is offline-first: the daily case is computed on your device from the date, so everything works with zero connection and no account.
Is there a new puzzle every day?
Yes — a fresh case lands at midnight in Easy, Medium and Hard, and every player worldwide gets the same board. That's what makes the leaderboard (and the bragging) fair. Learn more →
Can every puzzle really be solved without guessing?
Yes. Every case is generated with a solver-proven unique solution — a guarantee, not a promise. If you're stuck, a hint nudges you toward the clue you've overlooked; it never reveals the murderer.
What games is Cozy Culprits similar to?
Think Murdle's daily whodunit, Clues by Sam's deduction grid, and Wordle's streak-and-share loop — combined into one cozy iPhone game. Learn more →
Is Cozy Culprits on Android?
iPhone first — Android is planned. The waitlist covers both: you'll get one email when each version launches.
Tonight, in the manor
Someone's getting away with murder.
Someone's getting away with murder.
Unless you play.
Today's case takes about five minutes. Your streak starts tonight.