Induction
Fire probes into a sealed box and read their paths to find the hidden lodestones.
Every day: A new Daily Challenge every day, the same puzzle for everyone: fire probes into a hidden grid, read where they come out and find every hidden lodestone, scored against par, with a streak. New puzzle: Once a day (the listing does not state the time).
Induction on the App StoreInduction on Google PlayConnexus Puzzles' site
Induction is a daily deduction puzzle for iPhone and Android in the tradition of the classic Black Box game. Lodestones hide inside a grid you cannot see; you fire probes in from the edges and reason from hits, deflections, reflections and pass-throughs until you know where every one sits. The Daily Challenge is the same for everyone.
About Induction
Induction is set in a Victorian inventor's workshop and played on a sealed grid. Somewhere inside are a number of lodestones. You fire probes into the box from its edges and watch what happens. A beam that flies straight through has nothing in its path. A beam that never comes out has hit a lodestone directly. A beam that leaves somewhere unexpected has been deflected or reflected, and every such path is a clue to what lies nearby.
You mark your deductions on the grid and seal your answer when you are certain. Each puzzle has a par for the number of probes, a gauge shows how you are doing against it, and clean solves and streaks are tracked. Everything can be worked out by reasoning, with no luck, timers or move-matching.
The Daily Challenge is a new puzzle every day, the same for everyone, and its difficulty is labelled from Easy to Master. Beyond it are more than a thousand hand-tuned puzzles in notebook collections, from a gentle start to an expert codex, and a tutorial that teaches by demonstration.
Induction is made by Connexus Digital, the makers of Connexus Puzzles, and came out in August 2026. It plays fully offline with no account; signing in with Google or Apple backs up and syncs progress. It is free and supported by ads, with rewarded ads always optional and no energy systems or pay-to-win.
How to play Induction
- Open the Daily Challenge.
- Tap an edge slot to fire a probe into the hidden grid.
- Read the result: through, absorbed (a direct hit), deflected or reflected.
- Mark cells where you have deduced a lodestone must be.
- When every lodestone is marked, seal your answer and compare your probe count with par.
Screenshots
Tips
- Fire through the middle rows and columns first; a straight pass-through clears a whole line.
- A probe absorbed at once means a lodestone sits directly in its path.
- Treat every bend in a probe path as evidence: work out which hidden spots could have turned it, and test the likeliest one next.
- Fewer probes means a better score, so think before each shot once the first clues are in.
Questions
Is the Induction daily the same for everyone?
Yes. A new Daily Challenge every day, the same puzzle for everyone.
What kind of puzzle is it?
A hidden-object deduction game in the tradition of Black Box: you fire probes into a grid and deduce from their paths where the lodestones hide.
Is Induction free?
Yes, supported by ads. Rewarded ads are always optional, and there is no energy system.
Does it need a connection or account?
No. It plays fully offline; signing in is only for backup and sync.
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