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
- 14
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 3m 33s
- Round cost
- $0.2038 All 15 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":"person","event":"BEGIN","variation_token":"XSZW5TRZ"}Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.
Is the person currently alive?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person currently alive?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
“America's greatest living novelist”Open stephenkingbooks.co.uk (opens in a new tab)
The official website lists Stephen King’s latest news, including a July 13, 2026 post and a new short story by Stephen King in The Atlantic.Open stephenking.com (opens in a new tab)
Is the person a citizen of the United States?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person a citizen of the United States?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
country of citizenship — United StatesOpen wikidata.org (opens in a new tab)
Is the person primarily known for their work in the entertainment industry, such as acting, music, or filmmaking?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person primarily known for their work in the entertainment industry, such as acting, music, or filmmaking?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Stephen King is a prolific American novelist known for blending horror, fantasy, science fiction, and the macabre.Open britannica.com (opens in a new tab)
The Author — Stephen Edwin King was born in Portland, Maine in 1947.Open stephenking.com (opens in a new tab)
Has the person ever held elected public office in the United States?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Has the person ever held elected public office in the United States?"}}Is the person primarily known as a professional athlete or sports figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person primarily known as a professional athlete or sports figure?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Stephen King — American novelist.Open britannica.com (opens in a new tab)
Stephen Edwin King ... is an American author. Dubbed the "King of Horror", he is widely known for his horror fiction.Open en.wikipedia.org (opens in a new tab)
Is the person primarily known as a businessperson, entrepreneur, or corporate executive?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person primarily known as a businessperson, entrepreneur, or corporate executive?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Stephen Edwin King ... is an American author. Dubbed the “King of Horror”, he is widely known for his horror fiction.Open en.wikipedia.org (opens in a new tab)
King's impact on literature and popular culture remains profound, making him a celebrated figure in contemporary storytelling.Open ebsco.com (opens in a new tab)
Is the person primarily known for their work in politics, government, law, or activism?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person primarily known for their work in politics, government, law, or activism?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Stephen Edwin King ... is an American author. Dubbed the "King of Horror", he is widely known for his horror fiction.Open en.wikipedia.org (opens in a new tab)
Stephen King is a prolific American author known for his significant contributions to the horror genre.Open ebsco.com (opens in a new tab)
Is the person primarily known for their work in science, technology, mathematics, academia, or space exploration?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person primarily known for their work in science, technology, mathematics, academia, or space exploration?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Stephen King is a 'New York Times'-bestselling novelist who made his name in the horror and fantasy genres.Open biography.com (opens in a new tab)
He has since published over 50 books and has become one of the world's most successful writers.Open stephenking.com (opens in a new tab)
Is the person primarily known as a writer, author, or journalist?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person primarily known as a writer, author, or journalist?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The official Stephen King site identifies him under “The Author.”Open stephenking.com (opens in a new tab)
Stephen King is a New York Times-bestselling novelist who made his name in the horror and fantasy genres.Open biography.com (opens in a new tab)
Is the person primarily known for writing fiction, such as novels or short stories?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person primarily known for writing fiction, such as novels or short stories?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Stephen King is a 'New York Times'-bestselling novelist who made his name in the horror and fantasy genres.Open biography.com (opens in a new tab)
He continued to produce short stories and to work on novels.Open stephenking.com (opens in a new tab)
Is the person female?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person female?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He became a prolific writer of enormously popular books and one of the world’s best-selling writers.Open britannica.com (opens in a new tab)
Stephen King is an American novelist and short-story writer.Open kids.britannica.com (opens in a new tab)
Is the person primarily known for writing in the science fiction or fantasy genres?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person primarily known for writing in the science fiction or fantasy genres?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Dubbed the “King of Horror”, he is widely known for his horror fiction and has also explored other genres, among them science fiction and fantasy.Open en.wikipedia.org (opens in a new tab)
Is the person widely known for writing thrillers, crime fiction, or horror?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person widely known for writing thrillers, crime fiction, or horror?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
He is widely known for his horror fiction and has also explored other genres, among them suspense and crime.Open en.wikipedia.org (opens in a new tab)
Is the person widely regarded as a master or prominent author of the horror genre?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the person widely regarded as a master or prominent author of the horror genre?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Stephen King is the undisputed master of horror.Open theconversation.com (opens in a new tab)
Dubbed the “King of Horror,” he is widely known for his horror fiction.Open en.wikipedia.org (opens in a new tab)
Stephen King
Prolific American author renowned for his horror, supernatural fiction, and suspense novels
Validator rationale The proposed identity matches Stephen King, the prolific American author of horror and suspense fiction.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Prolific American author renowned for his horror, supernatural fiction, and suspense novels","name":"Stephen King","question":null}}