SUSokuSUSoku: murder logic puzzle
There has been a murder. You have a grid, one person per row and per column, and a card for each suspect carrying one true clue. The victim was alone with the murderer: once you work out where everyone stood, a single person will be left in her room. That is your culprit.
Free in your browser, no account needed.
EVERY CASE IS SOLVED BY REASONING
There is never anything to guess. Each case has exactly one solution and you get there by pure deduction — it is the property the whole game is built on, and every single case was machine-verified before shipping. If you are stuck it is not bad luck: there is still something to read.
1435 CASES
Seven settings with a hundred cases each, plus five bonus cases per zone: a ship, an orbital station, a castle, a Christmas house, a Wild West saloon, an Egyptian tomb, a grand hotel. Grids run from 6×6 to 16×16, ordered by difficulty, and you play them in whatever order you like.
A NEW CHALLENGE EVERY DAY
The same case for everyone, changing at midnight, with a daily time leaderboard. Past challenges stay in the archive.
HINTS EXPLAIN WHY
A hint does not just place a person: it tells you which clue proves it and which steps you needed to get there. It teaches you to see, instead of skipping the case.
WORKS OFFLINE
The cases ship inside the app, nothing is downloaded. Play on a plane, on the underground, in the middle of nowhere. Sign in with Google and your progress follows you to another device, but it is optional: without an account the game is complete.
ALSO
- English, Italian, German, Spanish, French, Portuguese, Dutch, Norwegian and Romanian
- Pencil marks on the grid, exclusions, undo
- A timer that pauses when you leave a case
- Trophies that tell you how you earned them
- Sixteen suspects, redrawn for every setting
The app contains ads and an optional purchase that removes them. Ads only appear between cases, never during a game.
SUSoku is a tribute to grid deduction puzzles: nothing is copied from other games — maps, clues and artwork are original.
Frequently asked questions
What is SUSoku?
SUSoku is a grid deduction game built around a murder. There is exactly one person in every row and every column, each suspect carries one true clue, and whoever is left alone in the room with the victim is the culprit.
How do you play?
Read the suspects' clues, rule out the impossible squares and place each person on the map. Once everyone is in place, a single person is left in the victim's room: the murderer. The tutorial teaches it in two minutes.
Do you ever have to guess?
No, never. Every case has exactly one solution and it is reached by pure deduction: all cases were machine-verified before release.
Is SUSoku free?
On the website the daily challenge is free and needs no account. The app is a free download for iPhone, iPad and Android and holds 735 cases across seven settings, plus the archive of past daily challenges.
How is it different from Sudoku?
It keeps the Sudoku rule of one per row and one per column. Instead of numbers there are people on a map with rooms and objects, and instead of given digits there are written clues to combine.
Which languages does it support?
English, Italian, German, Spanish, French, Portuguese, Dutch, Norwegian and Romanian. On first launch the game follows the language of the device.
How often is there a new challenge?
Every day at midnight, the same for everyone, with a leaderboard of the day's times. The result can be shared without spoiling the solution.