You are the Guesser being evaluated in a Twenty Questions benchmark. One subject is hidden. The initial BEGIN message provides its broad category as trusted game metadata. Identify the subject using as few counted questions as possible. ASK is only for learning a property that helps distinguish possible candidates. Never use ASK to confirm a named candidate or ask whether the subject is a specific identity. When you are ready to name a candidate, use GUESS immediately. A correct GUESS costs zero counted questions; an incorrect GUESS costs exactly one, the same as ASK. A GUESS must provide both a name and a short identifying description. The engine replies only YES, NO, or UNKNOWN; UNKNOWN is a valid answer meaning the factual adjudication system could not determine the proposition under its evidence policy. Questions requiring proof of absence, exclusivity, completeness, exact counts, or subjective classification are more likely to return UNKNOWN. Prefer direct, positively verifiable properties when possible. The initial BEGIN event includes an opaque variation_token that contains no information about the hidden subject. Do not interpret, repeat, mention, or derive meaning from it. After BEGIN, each user reply is either one adjudicated YES, NO, or UNKNOWN token or a fixed FORMAT_ERROR event. FORMAT_ERROR means your immediately preceding response did not match the required structured-action contract, was not semantically adjudicated, and consumed one counted turn. Use the formats in that event and try again. Never infer that the attempted question or guess was right or wrong. At most 50 questions or rejected guesses are counted. After that limit you receive one final guess-only opportunity. Format errors also consume counted turns. The provider wire response is an object with exactly one `result` action. On the final opportunity ASK is forbidden. Return only the required structured response. Do not include analysis, hidden reasoning, or additional fields.
- Questions
- 29
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 4m 5s
- Round cost
- $0.1076 All 30 turns
Transcript
Questions and answers.
Turns are shown in the order they happened. Each shows the Guesser's question or guess, then the final checked answer.
Exact Guesser setupSystem message and BEGIN event
The Guesser received these messages at the start of the round. The BEGIN message holds the broad category and a code made from the base seed and round number, which reveals nothing about the subject.
{"category":"mythological_figure","event":"BEGIN","variation_token":"BKXG3AZI"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
Q1
1 · Guesser asks
Is the mythological figure male?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure male?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Achilles, in Greek mythology, son of the mortal Peleus...Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q2
1 · Guesser asks
Is the mythological figure associated with the underworld?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure associated with the underworld?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Odysseus meets the spirit of the great warrior Achilles in the nether-world.Open worldhistory.org (opens in a new tab)
Achilles, just slain in the Trojan War, arrives in the Underworld.Open ed.ted.com (opens in a new tab)
2 · Answer check returns Yes
Q3
1 · Guesser asks
Is the mythological figure from Greek mythology?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure from Greek mythology?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
In Greek mythology, Achilles was the greatest warrior of the Greek army in the Trojan War.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q4
1 · Guesser asks
Does the mythological figure have multiple names or aliases in different cultures or traditions?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does the mythological figure have multiple names or aliases in different cultures or traditions?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Variants: Achilleus (Greek Mythology), Achilleus (Ancient Greek); Other Languages & Cultures: Achille (French, Italian), Aquiles (Portuguese, Spanish).Open behindthename.com (opens in a new tab)
2 · Answer check returns Yes
Q5
1 · Guesser guesses
Hades
Greek god of the underworld
Validator rationale The trusted subject is Achilles, while the proposed identity is Hades, a different mythological figure.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek god of the underworld","name":"Hades","question":null}} 2 · Validator returns No
Q6
1 · Guesser asks
Is the mythological figure a ruler or king of the underworld?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure a ruler or king of the underworld?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Achilles is renowned as the greatest warrior of the Greek army during the Trojan War.Open britannica.com (opens in a new tab)
There he ruled with his queen, Persephone, over the infernal powers and over the dead.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q7
1 · Guesser asks
Is the mythological figure related to or associated with the ferryman Charon?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure related to or associated with the ferryman Charon?"}} 2 · Answer check returns Unknown
Q8
1 · Guesser asks
Is the mythological figure associated with death or dying?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure associated with death or dying?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
An arrow shot by Paris struck his heel and killed him.Open encyclopedia.com (opens in a new tab)
Achilles’ spirit appears in the Odyssey, in which he discusses his death.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q9
1 · Guesser guesses
Thanatos
Greek personification of death
Validator rationale The proposal identifies Thanatos, the Greek personification of death, while the trusted subject is Achilles, a Greek mythological hero.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek personification of death","name":"Thanatos","question":null}} 2 · Validator returns No
Q10
1 · Guesser asks
Does the mythological figure have a role in guiding souls to the afterlife?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does the mythological figure have a role in guiding souls to the afterlife?"}} 2 · Answer check returns Unknown
Q11
1 · Guesser asks
Is the mythological figure one of the offspring of Nyx?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure one of the offspring of Nyx?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He was the son of the mortal king Peleus and the sea nymph Thetis.Open britannica.com (opens in a new tab)
Children and their parentage ... Nyx ... Apate, Ker, Momos, Moros, Oizys, Oniros, Philotes, Eris, Eros, Geras, Hemera, Hypnos, Hesperides, Lyssa.Open maicar.com (opens in a new tab)
2 · Answer check returns No
Q12
1 · Guesser guesses
Orpheus
Greek hero who journeyed to the underworld
Validator rationale The trusted subject is Achilles, while the proposed identity is Orpheus, a different Greek mythological figure.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek hero who journeyed to the underworld","name":"Orpheus","question":null}} 2 · Validator returns No
Q13
1 · Guesser asks
Is the mythological figure associated with punishment or judgment in the underworld?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure associated with punishment or judgment in the underworld?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Rhadamanthys, Minos and Aiakos (Aeacus) were the judges of the dead.Open theoi.com (opens in a new tab)
Odysseus meets the spirit of ... Achilles in the nether-world, where Achilles tells him he would rather be a landless slave on earth than a king in the underworld.Open worldhistory.org (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser guesses
Cerberus
Three-headed dog guarding the gates of the underworld
Validator rationale The trusted subject is Achilles, while the proposal identifies Cerberus, a different mythological figure.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Three-headed dog guarding the gates of the underworld","name":"Cerberus","question":null}} 2 · Validator returns No
Q15
1 · Guesser asks
Is the mythological figure associated with violence or bloodlust in the context of the underworld?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the mythological figure associated with violence or bloodlust in the context of the underworld?"}} 2 · Answer check returns Unknown
Q16
1 · Guesser guesses
Tantalus
Figure in Greek mythology punished in the underworld
Validator rationale The proposal identifies Tantalus, a different Greek mythological figure from Achilles.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Figure in Greek mythology punished in the underworld","name":"Tantalus","question":null}} 2 · Validator returns No
Q17
1 · Guesser guesses
Hermes Psychopompus
Greek god guiding souls to the underworld
Validator rationale The trusted subject is Achilles, while the proposal identifies Hermes Psychopompus, a different Greek mythological figure.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek god guiding souls to the underworld","name":"Hermes Psychopompus","question":null}} 2 · Validator returns No
Q18
1 · Guesser guesses
Keres
Greek female death spirits
Validator rationale The trusted subject is Achilles, a Greek mythological hero; the proposal identifies Keres, Greek female death spirits, which is a different entity.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek female death spirits","name":"Keres","question":null}} 2 · Validator returns No
Q19
1 · Guesser guesses
Tartarus
Greek primordial deity or the deep abyss used as a dungeon of torment and suffering
Validator rationale The trusted subject is Achilles, while the proposed identity is Tartarus, a different mythological entity.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek primordial deity or the deep abyss used as a dungeon of torment and suffering","name":"Tartarus","question":null}} 2 · Validator returns No
Q20
1 · Guesser guesses
Erinyes
Greek goddesses of vengeance associated with the underworld
Validator rationale The proposal identifies the Erinyes, while the trusted subject is Achilles.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek goddesses of vengeance associated with the underworld","name":"Erinyes","question":null}} 2 · Validator returns No
Q21
1 · Guesser guesses
Charon
Ferryman of the dead in Greek mythology
Validator rationale The trusted subject is Achilles, while the proposed identity is Charon, a different mythological figure.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Ferryman of the dead in Greek mythology","name":"Charon","question":null}} 2 · Validator returns No
Q22
1 · Guesser guesses
Lamia
A female spirit or monster in Greek mythology associated with the underworld and devouring young children
Validator rationale The proposal identifies Lamia, a Greek mythological spirit or monster, while the trusted subject is Achilles, the Greek hero of the Trojan War.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"A female spirit or monster in Greek mythology associated with the underworld and devouring young children","name":"Lamia","question":null}} 2 · Validator returns No
Q23
1 · Guesser guesses
Hypnos
Greek god of sleep, often associated with the underworld
Validator rationale The proposal identifies Hypnos, the Greek god of sleep, while the trusted subject is Achilles, the mythological hero of the Trojan War.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek god of sleep, often associated with the underworld","name":"Hypnos","question":null}} 2 · Validator returns No
Q24
1 · Guesser guesses
Melinoe
Greek goddess of ghosts and the underworld
Validator rationale The proposal identifies Melinoe, a Greek goddess, while the trusted subject is Achilles, the mythological hero.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek goddess of ghosts and the underworld","name":"Melinoe","question":null}} 2 · Validator returns No
Q25
1 · Guesser guesses
Sisyphus
A figure from Greek mythology condemned to roll a boulder up a hill in the underworld
Validator rationale The trusted subject is Achilles, while the proposed identity is Sisyphus, a different mythological figure.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"A figure from Greek mythology condemned to roll a boulder up a hill in the underworld","name":"Sisyphus","question":null}} 2 · Validator returns No
Q26
1 · Guesser guesses
Tityus
Giant in Greek mythology punished in the underworld
Validator rationale The proposal identifies Tityus, a different Greek mythological figure from Achilles.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Giant in Greek mythology punished in the underworld","name":"Tityus","question":null}} 2 · Validator returns No
Q27
1 · Guesser guesses
Ixion
A figure from Greek mythology punished in the underworld by being bound to a wheel
Validator rationale The proposal identifies Ixion, whereas the trusted subject is Achilles.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"A figure from Greek mythology punished in the underworld by being bound to a wheel","name":"Ixion","question":null}} 2 · Validator returns No
Q28
1 · Guesser guesses
Lachesis
One of the three Moirai or Fates from Greek mythology, often associated with determining the length of a person's life thread, and sometimes linked to the underworld context through their role in deciding the fate of souls
Validator rationale The proposal identifies Lachesis, a Greek Fate, while the trusted subject is Achilles, the Trojan War hero.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"One of the three Moirai or Fates from Greek mythology, often associated with determining the length of a person's life thread, and sometimes linked to the underworld context through their role in deciding the fate of souls","name":"Lachesis","question":null}} 2 · Validator returns No
Q29
1 · Guesser guesses
Mormo
A female ghost or specter in Greek mythology associated with frightening children
Validator rationale The proposal identifies Mormo, a Greek mythological female specter, while the trusted subject is Achilles.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"A female ghost or specter in Greek mythology associated with frightening children","name":"Mormo","question":null}} 2 · Validator returns No
G
1 · Guesser guessesNot counted
Achilles
A hero from Greek mythology who was associated with the underworld after his death
Validator rationale The proposed identity names Achilles and describes a compatible Greek mythological hero; the added underworld detail does not conflict with the trusted subject.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"A hero from Greek mythology who was associated with the underworld after his death","name":"Achilles","question":null}} 2 · Validator returns Yes