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.
Round 5
Round 5
Identified Albert Einstein in 17 counted questions.
Back to all Albert Einstein rounds- Questions
- 17
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 3m 29s
- Round cost
- $0.2056 All 18 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.
Q1
1 · Guesser asks
Is this person a real, historical human being as opposed to a fictional character?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person a real, historical human being as opposed to a fictional character?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Born: March 14, 1879 Ulm, Germany Died: April 18, 1955 Princeton, Massachusetts German-born American physicist and scientist Albert Einstein.Open notablebiographies.com (opens in a new tab)
2 · Answer check returns Yes
Q2
1 · Guesser asks
Is this person currently alive?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person currently alive?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein died in Princeton on 18 April 1955 after a brief illness.Open library.ethz.ch (opens in a new tab)
2 · Answer check returns No
Q3
1 · Guesser asks
Was this person born after January 1, 1900?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born after January 1, 1900?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein was born on 14 March 1879, at Ulm in Wurttemberg, Germany.Open royalsocietypublishing.org (opens in a new tab)
2 · Answer check returns No
Q4
1 · Guesser asks
Was this person born after January 1, 1800?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born after January 1, 1800?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
BORN: March 14, 1879Open biography.com (opens in a new tab)
2 · Answer check returns Yes
Q5
1 · Guesser asks
Was this person primarily associated with North America?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily associated with North America?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
From 1902–1909 Einstein spent successful years in Bern... worked as professor at the Prussian Academy of Science in Berlin from 1914–1932. Due to political reasons he had to emigrate in 1933. He found his last workplace in Princeton.Open einstein-website.de (opens in a new tab)
Albert Einstein was born at Ulm, in Württemberg, Germany... he continued his education at Aarau, Switzerland... He became a German citizen in 1914.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q6
1 · Guesser asks
Was this person primarily associated with Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily associated with Europe?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein had two careers as a professional physicist, the first spent through 1933 entirely at German-speaking universities in central Europe, the second at the Institute for Advanced Studies in Princeton, New Jersey, from 1933 until his death in 1955.Open physicstoday.aip.org (opens in a new tab)
The German-born physicist Albert Einstein developed the first of his groundbreaking theories while working as a clerk in the Swiss patent office in Bern.Open history.com (opens in a new tab)
2 · Answer check returns Yes
Q7
1 · Guesser asks
Is this person female?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person female?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
separating the myth of Einstein from what the Einstein archives can tell us about ... the manOpen einstein.caltech.edu (opens in a new tab)
2 · Answer check returns No
Q8
1 · Guesser asks
Was this person primarily known for their work in science, mathematics, or technology?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for their work in science, mathematics, or technology?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein (1879-1955) was a German-born theoretical physicist, best known for developing the theory of relativity and important contributions to quantum mechanics.Open archives.gov (opens in a new tab)
German-born physicist who developed the special and general theories of relativity and won the Nobel Prize for Physics in 1921.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q9
1 · Guesser asks
Was this person primarily known for their work in physics or astronomy?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for their work in physics or astronomy?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein (1879-1955) was a German-born theoretical physicist, best known for developing the theory of relativity and important contributions to quantum mechanics.Open archives.gov (opens in a new tab)
German-born physicist who developed the special and general theories of relativity and won the Nobel Prize for Physics in 1921.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q10
1 · Guesser asks
Was this person born before January 1, 1850?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born before January 1, 1850?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein was born on March 14, 1879.Open biography.com (opens in a new tab)
2 · Answer check returns No
Q11
1 · Guesser asks
Was this person awarded a Nobel Prize in Physics?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person awarded a Nobel Prize in Physics?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
The Nobel Prize in Physics 1921 was awarded to Albert Einstein "for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect".Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q12
1 · Guesser asks
Was this person born in or after 1875?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in or after 1875?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein was born on 14 March 1879, at Ulm in Wurttemberg, Germany.Open royalsocietypublishing.org (opens in a new tab)
2 · Answer check returns Yes
Q13
1 · Guesser asks
Was this person born in a German-speaking country (such as Germany, Austria, or Switzerland)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in a German-speaking country (such as Germany, Austria, or Switzerland)?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein was born on March 14, 1879, in Ulm, Württemberg, Germany.Open biography.com (opens in a new tab)
2 · Answer check returns Yes
Q14
1 · Guesser asks
Was this person born before January 1, 1885?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born before January 1, 1885?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
BORN: March 14, 1879Open biography.com (opens in a new tab)
2 · Answer check returns Yes
Q15
1 · Guesser asks
Did this person receive the Nobel Prize in Physics before 1930?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person receive the Nobel Prize in Physics before 1930?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein received his Nobel Prize one year later, in 1922.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q16
1 · Guesser asks
Was this person born in the year 1879?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in the year 1879?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein was born in Ulm, Germany, on 14 March 1879.Open library.ethz.ch (opens in a new tab)
2 · Answer check returns Yes
Q17
1 · Guesser asks
Did this person receive the Nobel Prize in Physics before 1920?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person receive the Nobel Prize in Physics before 1920?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein received his Nobel Prize one year later, in 1922.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
G
1 · Guesser guessesNot counted
Albert Einstein
German-born theoretical physicist who developed the theory of relativity and won the 1921 Nobel Prize in Physics
Validator rationale The proposed identity names Albert Einstein and matches the trusted subject's description.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German-born theoretical physicist who developed the theory of relativity and won the 1921 Nobel Prize in Physics","name":"Albert Einstein","question":null}} 2 · Validator returns Yes