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
- 8
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 2m 4s
- Round cost
- $0.0793 All 9 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":"EAQCORIU"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
Q1
1 · Guesser asks
Is this figure originally from Greek mythology?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this figure originally 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
Q2
1 · Guesser asks
Is this figure a deity (god or goddess)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this figure a deity (god or goddess)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Though Achilles was a mortal hero rather than a god, there is some evidence of Achillean cults.Open ebsco.com (opens in a new tab)
Achilles ... a hero for all times, a mortal man favored by the immortal gods.Open cornellcollege.edu (opens in a new tab)
2 · Answer check returns No
Q3
1 · Guesser asks
Is this figure a hero from Greek mythology?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this figure a hero from Greek mythology?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
The warrior Achilles is one of the great heroes of Greek mythology.Open history.com (opens in a new tab)
2 · Answer check returns Yes
Q4
1 · Guesser asks
Did this hero slay a famous monster?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this hero slay a famous monster?"}} 2 · Answer check returns Unknown
Q5
1 · Guesser asks
Is this figure male?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this 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... and the Nereid... Thetis.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q6
1 · Guesser asks
Is this figure a demigod?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this figure a demigod?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Achilles was a warrior, but he was also a demigod. His parents were Peleus and Thetis.Open theoi.com (opens in a new tab)
2 · Answer check returns Yes
Q7
1 · Guesser asks
Is this hero the son of Zeus?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this hero the son of Zeus?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Achilles, in Greek legend, was the son of the mortal Peleus, king of the Myrmidons, and the Nereid, or sea nymph, Thetis.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q8
1 · Guesser asks
Is this hero associated with the Trojan War?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this hero associated with the Trojan War?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Achilles was ... the greatest warrior of the army of Agamemnon in the Trojan War.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
Achilles
Greek demigod hero of the Trojan War, son of Peleus and Thetis
Validator rationale The proposed identity is Achilles, matching the trusted mythological figure and Trojan War context.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Greek demigod hero of the Trojan War, son of Peleus and Thetis","name":"Achilles","question":null}} 2 · Validator returns Yes