How to play Ropecall: rules and strategy to crack the secret rule
Everything you need to play Ropecall, plus tips to get a better score.
How to play
- The bouncer of the monster club only lets some monsters in, following a secret rule. Work it out in fewer tests than the bot.
- Every monster has 5 traits: shape (round, square, triangle, star), colour, pattern (plain, stripes, spots), 1 to 3 eyes, and a hat or not. That makes 288 monsters. Each colour has its own ears, so colour never depends on telling colours apart.
- You start with 6 examples on the wall: 3 let in, 3 turned away.
- Build a monster in the tester and send it to the door: the bouncer lets it in or turns it away. Each test counts 1, and a monster can only go to the door once.
- When you think you've got it, take the exam: 8 new monsters, call each one in or out. All 8 right and the rule is cracked. Any wrong and you're only told how many: it costs 2 tests and you keep testing. After 3 failed exams the night is over and the rule is revealed.
- Rules are always short: one trait (“only blue ones”, “no hats”), or two traits joined by “and”, “or”, or “exactly one of the two”. Eyes can also be “2 or more” or “2 or fewer”.
- The bot played the same night, always sending the monster that rules out the most. Fewer tests than the bot is 🏆, the same is 🤝, both ⭐⭐⭐; one or two more is ⭐⭐, more than that ⭐.
- Rules get trickier through the week: a single trait on Monday, two traits with a “not” inside on Sunday.
- On a keyboard, S, C, P, E and H change each trait (Shift goes back) and Enter sends; in the exam, ← is out and → is in. Door sounds, vibration and calm mode are in Settings.
Strategy: try to break your own theory
Change one trait at a time. If a round red monster gets in and the very same monster in blue doesn't, colour matters. One change, one clear answer.
Send the monster that would break your theory, not one that agrees with it. If you think “blue ones get in”, try a blue one that is different in everything else, and a non-blue one that looks just like the ones inside.
Use the wall. Filter it by a trait (say, hats) and compare both columns: if every monster inside has it and none outside does, you're onto something.
How the bot thinks: it keeps every rule that still fits what it has seen and always sends the monster that splits them most evenly, so whatever the answer, about half of them are gone. That's why it rarely needs more than 6 or 7 tests.
Don't rush the exam: a failed one costs 2 tests. But when you're sure, taking it early is how you beat the bot.
Sharing shows one dot per test (🟢 in, 🔴 out) and each exam (✅ ❌): never which monsters, never the rule.