SUSoku: deduction 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.

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
• Italian and English
• 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.