Mystery Sudoku: Crimson Ledger

New worlds! An ocean liner under Halley's comet, a ryokan near Kyoto, an airship over the Atlantic and a research station in Antarctica. Who did it?

A cozy whodunit you solve like a sudoku. No ads between cases. Hints that explain, never spoil. Endless puzzle fun, with a new case every day.

You are the detective. Everyone has a statement: in a corner, next to a plant, to the left of Mortimer. Place the suspects on the floor plan, find who was alone with the victim and name the culprit. Got it right? Then they confess.

New to this kind of puzzle? A guided practice case shows you how.

DIVE INTO ENDLESS CASES A new case every day, a path from easy to master, and after that an archive that never runs out. The next case is already waiting.

SOLVE IT WITH LOGIC, NOT LUCK Everything follows from the statements. While it builds each puzzle, the engine proves there is only one solution.

HEAR THE SUSPECTS OUT Every clue is a statement: "I stood right next to a plant." If it matches what you placed, it turns green; if not, red. Accuse the wrong person and they deny it. Accuse the culprit and they confess.

CROSS OUT WHAT CAN'T BE Put a cross where a suspect cannot stand. Place someone and the rest of their row and column is crossed out for you. Zoom in on big boards, and tap ? to see every kind of statement explained again.

GET HINTS THAT EXPLAIN, NEVER SPOIL A hint points to the statement you have not used yet and shows which squares remain. Never the answer. You start with 10 hints, get 3 more every day and earn one for every case that gets three stars for the first time. After each case, Inspector Van Dam shows you how you found the culprit.

TRAVEL TO NEW WORLDS Each new world has its own story, eight suspects with engraved portraits and twelve rooms. • An ocean liner, 1910 — Halley's comet above the deck • A ryokan near Kyoto, 1925 — the cherry trees in bloom • A coffee fazenda in Brazil, 1926 — the harvest festival • An airship, 1929 — three days above the ocean • A research station in Antarctica, 1958 — the polar night • A count's palace in Saint Petersburg — New Year's Eve, 1899 • A safari lodge in the Maasai Mara, 1974 — the great migration • A hanok in Joseon Korea, 1795 — Chuseok under the full moon Plus a manor, a pirate ship, a night train, a circus, the Paris opera, a tomb in Luxor, a casino in Monte Carlo and a lighthouse in a storm.

PLAY A NEW CASE EVERY DAY The daily case moves to a new world each day, and a week strip shows your streak. Solve it seven days in a row and you earn a whole world, and another after thirty days. Missed a day? Play that case later. The case of the week is a master case, the same for everyone. Share your stars and time, never the solution. Inspector Van Dam writes your reminders. If your streak is at stake, he checks in at 9:30 pm. Skip a week and he quietly stops.

CLIMB FROM EASY TO MASTER Every world has eight parts of eight cases on one hand-drawn winding path. Master cases bring 9×9 floor plans, five suspects and fewer direct clues, yet every one can be solved step by step. The new worlds hold plenty of them. Halfway through each part a mini-game, at the end an evidence chest, and after that an endless archive.

EARN STARS, RANKS AND AWARDS Case closed: the stamp comes down, the board becomes your result and your ledger writes in the culprit. Stars for solving in one go without a hint, points for time and clean detective work, and ranks from Recruit to Master Detective. Awards, daily quests and a cabinet with one piece of evidence per solved case.

PLAY ON IPHONE AND IPAD, EVEN OFFLINE Your open case sits on your Lock Screen and in the Dynamic Island. Play as long as you like, without an account and with nothing to wait for. Your progress stays on your own device; only anonymous counters help us improve the game, and you can switch them off in Settings.

MADE IN THE NETHERLANDS By one independent developer. Play in 20 languages; pick yours in Settings.

Crimson Ledger is free to download. The Crimson Pass opens everything at once, with no subscription.