2/3
Monty Hall's Doors
Pick a door and the guardian opens a losing one. Just switching takes your odds from 1/3 to 2/3.
A Probability Puzzle Roguelike
Labyrinth of Probability
Trust your gut, and you lose.
The Monty Hall problem, the birthday paradox, Bayesian false positives.
Solve famous probability paradoxes with your own hands as you make your way through a 9-room labyrinth. Each run takes 2–3 minutes, and your sense of probability sharpens as you play.
Intuition vs Probability
Same labyrinth, different thinking.
Nearly 3× the win rate.
29%
Going with your gut
"Every door is the same." "This one feels right." The more plausible the answer, the deeper the trap.
VS
81%
Thinking in probabilities
Read the true odds from what you can see. Add smart use of fate stones, and the exit is within reach.
Clear rate in the standard Labyrinth when each strategy is followed in every room. Estimated from simulations during development.
7 Paradoxes
Seven rooms that betray your intuition.
Your answer sets your odds. After every room, you see the true odds of every choice and why.
7/8
Penney's Coin Duel
See your opponent's three-coin pattern, then pick yours. The right reply wins up to 7 times in 8.
31%
The Scout's Report
An accurate scout says "weak point". The chance there really is one can still be lower than you think.
23
The Birthday Horde
With 23 in a horde, the chance two share a birthday is already about even. Will they?
≠ 1/2
Bertrand's Chests
You drew a gold coin. Is the other one in the same chest gold too? Count coins, not chests.
⇄
Simpson's Spring
One potion wins overall, the other wins in every group. Look only at the totals and you pick the wrong one.
×2
The Two-Envelope Demon
One envelope holds twice the other. "Swapping always pays," whispers the demon. Spot the expected-value trap.
♛
Lord of Probability
Three battles in the ninth room. The same room can flip its answer depending on the guardian or the calendar.
Screens
One room, one paradox.
How to Play
Think, choose, and find out.
Answer the room's paradox
Doors, coins, reports, chests. Pick one choice and it is rolled at that answer's odds. A miss costs HP.
Learn the true odds
After every room, the real odds of each choice and a short explanation. Where your gut was wrong is where you grow.
Choose a path, place a bet
Pick the next room from two paths; the harsh path scores double. Bet a room's points on double or nothing. Fate stones reroll only when you miss.
Modes
A new challenge every day, a ranking worldwide.
LABYRINTH
Labyrinth
The core mode with a new set of rooms every run. Start with 20 HP and 2 fate stones.
DAILY
Daily Labyrinth
Everyone faces the same rooms each day. Only your first run of the day goes on the ranking.
MASTER
Master Labyrinth
Less HP, fewer fate stones and every room a level harder (in-app purchase). Scores are worth 1.5×.
RANKING
Online Ranking
All-time, daily, weekly and monthly. Joining is optional, and linking an account keeps your record on a new device.
Free to Play