ONE EXPLORER
How to play solo
Keep a table of inputs, observations and rejected models. Work between the three benches at your own pace. A notebook and calculator are useful; the manuals explain the rules you need.
Start on your own →THE EXAMINER’S CABINET
Hard logic puzzles.
One shared investigation.
An optional expert challenge for curious minds.
A brass research cabinet has been dismantled before its settings were recorded. Discover its hidden rules, rebuild a workable schedule and leave a proof the next keeper can reproduce.
Free beta · Solo or cooperative play · No download
- Play format
- Solo or with friends
- Design difficulty
- Expert
- The journey
- 6 stages
- Room access
- 3 hours
FROM THE GAME · NO COMPLETED ANSWERS
Choose a test that can prove you wrong.
What you actually do
The wiring bench offers competing models for the same apparatus. Choose switch settings, observe the lamps and discard models that disagree. Separate benches ask you to infer an instrument rule and schedule work on shared equipment.
Captured from the playable interface in a local test. Room conditions may differ. The screenshot is not a walkthrough.
Try a short practice puzzleTWO EXPLORERS
How to play with a partner
Let one person design an experiment while the other predicts what each candidate would do. Compare predictions before running the test, then exchange roles. Check the restoration schedule together before sealing it.
Open a room for two →A SEPARATE PRACTICE PUZZLE · NO ROOM NEEDED
Find the experiment that separates two models
A training lamp could follow either OR (on when at least one switch is on) or XOR (on when exactly one switch is on). A test with A on and B off lights the lamp. Which switch setting should you test next to distinguish the models?
Reveal the worked example
- The first observation does not distinguish them: both OR and XOR predict an on lamp for A=1, B=0.
- Test A=1, B=1. OR predicts on; XOR predicts off. The observation can now rule out one model.
Choose a test where the candidates disagree. This two-switch exercise is a simplified practice example; your game uses its own models, observations and validation inputs.
EXPERIMENT · DEDUCE · COORDINATE
Three advanced logic puzzles, connected
These puzzles ask you to build a method, test it and use it again. The three benches can be investigated in any order. Their results come together in a final challenge.
Find the hidden rule
Choose inputs for an unfamiliar brass instrument and record what its registers show. Infer the relationship, seal your experiment log and predict the results of fresh inputs.
Test the competing models
Several wiring diagrams could explain the lamps. Choose switch combinations that separate those explanations, eliminate the wrong models and test your surviving theory.
Plan the restoration shift
Three work orders share limited benches. Preserve each operation’s sequence, avoid resource clashes and find a schedule that meets the deadline.
A COLLEGE GAME NIGHT WITH A CHALLENGE
Brain games for college students and puzzle clubs
Bring a university society, a few classmates or friends who enjoy explaining why a solution works. Divide the benches between players, compare experiment notes and check each other’s assumptions before committing a result.
It also works as a solo investigation. Paper, a calculator and careful notes are useful. The manuals introduce the rules, including wraparound arithmetic and Boolean logic; the challenge is deciding how to use them.
WHAT MAKES IT HARD?
A result must survive the next test
New rooms receive different hidden settings. Sealing an experiment log reveals fresh test inputs, so a memorized code does not settle the investigation. The final proof links your restoration schedule to the instrument and wiring rules.
“Undergraduate-style reasoning” describes the design target. Difficulty has not been calibrated against a university course or formal assessment. No degree or minimum IQ is required.
Set up your team’s investigation
Create one room
Choose Expert Challenge, enter a nickname and share the invitation code. There is no email signup or payment during the beta.
Share the work
Explore the three parallel benches together or divide them between teammates. Use your own voice call if you are playing apart; room progress and notes are shared.
Compare your reasoning
Bring your results together for the final proof. Optional hints explain useful methods. There is no speed score; the room remains available for three hours from creation.
For a college puzzle club or a group of friends, the hosting guide helps you organize the conversation while the research benches run in parallel.
Before you take the expert challenge
Is this a high-IQ game or an IQ test?
If you are looking for “high-IQ games” because you enjoy difficult reasoning puzzles, this challenge offers experiments, deduction and planning. It does not measure IQ, award an intelligence score or claim to improve intelligence.
How does it compare with a hard online escape room?
The Examiner’s Cabinet concentrates on connected logic experiments and planning. Our story escape rooms put more emphasis on characters, observation and combining narrative clues. Choose the expert route when your group wants a more analytical game night.
Do I need university mathematics?
You need patience with numbers, rules and written instructions. The manuals explain the puzzle conventions. Experience with algebra, logic or scheduling can help, but enrollment in college and specialist subject knowledge are not entry requirements.
Can we play on phones or from separate devices?
The game runs in a browser and friends can join the same room from their own devices. A larger screen is helpful for comparing experiment tables and schedules. The suggested group is 1–6; a shared room supports up to 10 members.
Can AI solve these puzzles?
AI may help with reasoning, and we cannot guarantee that it cannot solve the challenge. Changing conditions and fresh experiments reduce the usefulness of a copied answer. For a self-directed challenge, your group can agree to use its own notes, a calculator and the in-game hints.
Is Expert Challenge free?
Yes, it is free during the beta, like the three story missions. Patreon support is optional and is not required to create or join a room.
OPEN THE CABINET
Find a rule worth trusting.
Start your free expert challengePrefer a story-led mystery?
Investigate missing evidence in Museum After Dark, share clues across a century in Signal Across Time, or guide a ship through a storm in The Last Lighthouse.