An on-chain investigation
The sudoku of investigation
Place the suspects on the grid like a sudoku, cross-check the clues and unmask the culprit. Free, no sign-up.
2-minute tutorial, then the initiation
How it works
Three steps, no crypto knowledge needed
Treasurer
Victim
The treasurer of a small DAO signed a suspicious transfer, then vanished. Four addresses are involved, only one betrayed him.
1A theft has happened
Every case opens with a briefing: a drained treasury, a victim, a handful of suspect addresses.
Miner
He signed in block 1.
Treasurer
He signed before the Anon Dev.
2Every suspect leaves a clue
Signing block, depth of the flow, zone crossed: the clues tell you where each one can stand.
- Culprit
3Unmask the culprit
Place each suspect, one per row and column, like a sudoku. The one sharing the victim's zone is the culprit.
Coming soon on paper
Chaindoku, volume 1: the puzzle book
An introduction, 53 cases and their solutions explained: 242 pages to solve with a pencil. The book is in the works.
Sign in with your email address to hear when it comes out.
A single email, at release. You can withdraw at any time.
The game file
What is Chaindoku?
- Exhibit A
A real logic puzzle
Every case has one solution, checked by a solver. Never luck: patient reasoning always leads to the culprit.
- Exhibit B
Learn by playing
The cases are inspired by real scams. Every technical term explains itself with a tap, free of jargon.
- Exhibit C
Free, no ads, no sign-up
In the browser, on phone or computer, in English or French. Nothing to install.
Ready to investigate?
Free, no ads, no sign-up. Your first case takes just a few minutes.
2-minute tutorial, then the initiation