Objective: help the detective identify the hidden pattern while following the private rule assigned to you.
If you are a regular player, answer questions according to your assigned rule.
If you are the detective, ask targeted questions and infer the pattern from responses.
Do not reveal your rule directly unless the game screen asks you to.
The round ends when the detective makes a final guess and the host marks it correct or incorrect.
or join existing room
Case File — Waiting Room
Awaiting Investigators
Share the code below with your group.
Room Code
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Player QR Join
Players In Room (0)
Host guide
Pick one detective or let the game assign one automatically.
Choose the hidden rule pair and keep it secret from players and detective.
Start the case, manage the questioning flow, and mark the detective's final guess.
Use the debrief to discuss assumptions, questioning quality, and how teams test patterns under uncertainty.
Step 1 — Pick the Detective
Click a player to assign them as detective. Or leave it and one will be picked automatically.
Step 2 — Choose the Hidden Rule Pair
Only you see this. Players and the detective do NOT.
Active Rule — Rule A
Active Rule — Rule B
Waiting for the host to begin...
Briefing
How This Works
For Everyone
One player is the detective. Everyone else secretly follows a hidden rule when answering questions.
The detective will ask yes/no questions to figure out the pattern.
Answers must follow the secret rule — but you may never state the rule.
Keep a straight face. Be consistent. The detective has 90 seconds.
You Are the Detective
Ask yes/no questions to anyone in the room. Try to detect the hidden pattern.
When you think you know it, submit your guess. You have 90 seconds.
Tip: Ask the same question to different people. Notice when answers differ.
You Are an Informant
Answer every question strictly according to your secret rule below.
Do not reveal the rule. Just answer YES or NO.
Your Secret Rule
Host Overview (Only You See This)
Rule A
Rule B
Note: Rule A and B both describe when to answer YES. Players apply whichever version fits them (e.g., one half of the room may satisfy A, the other B).
In practice, the pair creates a natural split — guide players to follow whichever rule is theirs based on the rule description.
Waiting for host to start the investigation...
Investigation in Progress
1:30
You Are the Detective
Ask yes/no questions to anyone in the room. Watch for patterns in the answers.
Submit Your Guess
Suspects
Your Secret Rule
Your rule will appear here...
Answer every question directed at you strictly according to this rule. Do not reveal the rule.
The detective is asking questions right now.
Wait to be called on. Answer YES or NO according to your rule above.
Players in Room
Active Rule — Visible Only to You
Rule A
Rule B
Players
Case Reveal
The Verdict
Detective's Guess
"..."
Correct — The pattern was cracked!
Not quite — The pattern held!
Awaiting verdict from host...
The Hidden Rule Pair
Rule A
Rule B
Did the detective crack the case?
Waiting for host...
Previous Rounds
Debrief
Reflection Time
Question text...
Discuss with your group. Host will advance when ready.