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 2
Round 2
Identified Albert Einstein in 17 counted questions.
Back to all Albert Einstein rounds- Questions
- 17
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 3m 40s
- Round cost
- $0.2083 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":"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 person currently alive?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the 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
Q2
1 · Guesser asks
Was the person born in or after 1900?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person born in or after 1900?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein — Born: 14 March 1879, Ulm, GermanyOpen nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q3
1 · Guesser asks
Was the person born in Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person born in Europe?"}}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
Q4
1 · Guesser asks
Was the person born in or after 1800?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person born in or after 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 the person best known for work in the arts or literature?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person best known for work in the arts or literature?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein ... is best known for the special and general theories of relativity.Open vision.org (opens in a new tab)
2 · Answer check returns No
Q6
1 · Guesser asks
Did the person serve as the head of state or head of government of a country?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person serve as the head of state or head of government of a country?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1952 he was offered the presidency of the state of Israel, but did not accept it.Open oxfordlearnersdictionaries.com (opens in a new tab)
Einstein ... gave his regretful no. The next day he wrote to Eban that he was deeply touched by the Israeli offer, but never undertook functions he could not fill to his satisfaction.Open content.time.com (opens in a new tab)
2 · Answer check returns No
Q7
1 · Guesser asks
Was the person primarily known for contributions to science or mathematics?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known for contributions to science or mathematics?"}}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)
Albert Einstein was a German-born theoretical physicist, widely acknowledged to be one of the greatest physicists of all time.Open amacad.org (opens in a new tab)
2 · Answer check returns Yes
Q8
1 · Guesser asks
Was the person known primarily for work in biology or medicine?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person known primarily for work in biology or medicine?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
German-born physicist who developed the special and general theories of relativity and won the Nobel Prize for Physics.Open britannica.com (opens in a new tab)
Albert Einstein, German-Swiss physicist and Nobel laureate, is best known for the special and general theories of relativity.Open vision.org (opens in a new tab)
2 · Answer check returns No
Q9
1 · Guesser asks
Was the person primarily known for work in physics or chemistry?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known for work in physics or chemistry?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein was a German-born theoretical physicist, widely acknowledged to be one of the greatest physicists of all time.Open amacad.org (opens in a new tab)
German-born physicist who developed the special and general theories of relativity and won the Nobel Prize for Physics.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q10
1 · Guesser asks
Did the person receive a Nobel Prize?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person receive a Nobel Prize?"}}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.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q11
1 · Guesser asks
Was the person a woman?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person a woman?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Einstein was a German mathematician and physicist who developed the special and general theories of relativity.Open biography.com (opens in a new tab)
2 · Answer check returns No
Q12
1 · Guesser asks
Did he receive the Nobel Prize in Physics?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did he receive the 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
Q13
1 · Guesser asks
Was he awarded the Nobel Prize in Physics before 1920?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was he awarded the Nobel Prize in Physics before 1920?"}}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... Albert Einstein received his Nobel Prize one year later, in 1922.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser asks
Was he born in or after 1870?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was he born in or after 1870?"}}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
Q15
1 · Guesser asks
Was he awarded the Nobel Prize in Physics before 1930?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was he awarded the Nobel Prize in Physics before 1930?"}}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.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q16
1 · Guesser asks
Was he born in or after 1880?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was he born in or after 1880?"}}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 No
Q17
1 · Guesser asks
Was he born in what is now Germany?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was he born in what is now Germany?"}}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; today Baden-Württemberg).Open einstein-website.de (opens in a new tab)
2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
Albert Einstein
German-born theoretical physicist who developed the theory of relativity and received the 1921 Nobel Prize in Physics.
Validator rationale The proposed identity names Albert Einstein and matches the trusted subject’s entity and identifying description.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German-born theoretical physicist who developed the theory of relativity and received the 1921 Nobel Prize in Physics.","name":"Albert Einstein","question":null}} 2 · Validator returns Yes