Alibi Machine

Alibi Machine offers detective logic puzzles built around five visitors to a gallery. In each case you reconstruct which room every visitor entered and at what time, using clues that are all true, with every visitor, room and time used exactly once. The engine checks all 14,400 possible registers (5! x 5!) to confirm that each puzzle has a single complete solution. The listing describes the product and its puzzles as AI-created, with the logic verified by exhaustive code checks.

Three fixed cases are free to play in the browser: First Light (easy, direct clues), Glass Key (standard, linked clues) and False Frame (hard, either/or logic). The sample register lists five rooms, from the Atrium to the Archive, and arrival times from 7:00 PM to 8:00 PM in 15-minute steps. You can tick clues as you use them, then press Check register. The assignment asks who visited the Archive when a sensor recorded a moved object, and the page notes that this identifies a witness, not a culprit. Difficulty labels describe clue types, not tested solve times.

An optional one-time edition costs $15 USD and delivers 24 printable cases plus an offline HTML generator by ZIP after Stripe payment, with no subscription.

What the page shows

• Five visitors, five rooms, five arrival times per case
• Checks all 14,400 possible registers for a unique solution
• Three free cases: First Light, Glass Key and False Frame
• Tick off clues as you use them, then check your register
• Optional $15 edition with 24 printable cases and an offline generator

Role of AI

The listing describes the puzzles as AI-created, and the site mentions exhaustive checks that each puzzle has a single solution.

Listed on AI Built Games · Maker: Alibi Machine