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 4
Round 4
Identified Albert Schweitzer in 26 counted questions.
Back to all Albert Schweitzer rounds- Questions
- 26
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 13m 2s
- Round cost
- $0.8785 All 27 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":"BYOMPCJW"}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 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 Schweitzer died on September 4, 1965, and was buried at Lambaréné.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q2
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.
Albert Schweitzer (January 14, 1875-September 4, 1965) was born into an Alsatian family.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q3
1 · Guesser asks
Was this person a citizen of the United States?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person a citizen of the United States?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Citizenship: Germany (until 1919); France (from 1919).Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns No
Q4
1 · Guesser asks
Was this person born in Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in Europe?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer was born in Kaysersberg, Upper Alsace, Germany (now in France), on January 14, 1875.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q5
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 Schweitzer (January 14, 1875-September 4, 1965) was born into an Alsatian family.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q6
1 · Guesser asks
Was this person known primarily for work in science, mathematics, or technology?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person known primarily for work in science, mathematics, or technology?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
His fame as a theological scholar rests on his 1906 publication The Quest of the Historical Jesus; he was also internationally known as a concert organist.Open nobelprize.org (opens in a new tab)
Role: Missionary surgeon; Founder of Lambaréné. Prize motivation: “for his altruism, reverence for life, and tireless humanitarian work.”Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q7
1 · Guesser asks
Was this person primarily known for contributions to the arts or literature?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for contributions to the arts or literature?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Musician, theologian and physician, Albert Schweitzer was above all, a true humanitarian.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
Role: Missionary surgeon; Founder of Lambaréné ... Prize motivation: “for his altruism, reverence for life, and tireless humanitarian work.”Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q8
1 · Guesser asks
Was this person primarily known as a political leader, monarch, or military figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as a political leader, monarch, or military figure?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He published The Quest of the Historical Jesus, a book on which much of his fame as a theological scholar rests.Open nobelprize.org (opens in a new tab)
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
Albert Schweitzer, an Alsatian-German theologian, philosopher, organist, and mission doctor, gained international recognition for his multifaceted work.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q9
1 · Guesser asks
Was this person primarily known for philosophy, social science, or religion?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for philosophy, social science, or religion?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1906 he published The Quest of the Historical Jesus, a book on which much of his fame as a theological scholar rests.Open nobelprize.org (opens in a new tab)
He is renowned for his theological work, The Quest of the Historical Jesus.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q10
1 · Guesser asks
Was this person born in a German-speaking country?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in a German-speaking country?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1875, when Albert was born, Alsace was German and became part of the Reichsland Elsass-Lothringen.Open schweitzer.org (opens in a new tab)
Albert Schweitzer was born in Kaysersberg, Upper Alsace, Germany (now in France), on January 14, 1875.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q11
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 Schweitzer, born on January 14, 1875 in Alsace, Germany (now a part of France).Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns No
Q12
1 · Guesser asks
Is this person primarily known as a founder or pioneer of psychoanalysis or psychology?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person primarily known as a founder or pioneer of psychoanalysis or psychology?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1906 he published The Quest of the Historical Jesus, a book on which much of his fame as a theological scholar rests. He was also internationally known as a concert organist.Open nobelprize.org (opens in a new tab)
Role: Missionary surgeon; Founder of Lambaréné. Doctor, Missionary, Philosopher and Musician.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q13
1 · Guesser asks
Is this person widely considered primarily a philosopher?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person widely considered primarily a philosopher?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Musician, theologian and physician, Albert Schweitzer was above all, a true humanitarian.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
He was above all a man of action and a pioneer of humanitarian aid.Open schweitzer.org (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser asks
Is this person widely regarded as a sociologist?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person widely regarded as a sociologist?"}} 2 · Answer check returns Unknown
Q15
1 · Guesser asks
Was this person primarily known as an economist?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as an economist?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Much of his fame as a theological scholar rests on his 1906 book The Quest of the Historical Jesus; he was also internationally known as a concert organist.Open nobelprize.org (opens in a new tab)
Musician, theologian and physician, Albert Schweitzer was above all, a true humanitarian.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns No
Q16
1 · Guesser asks
Did this person die before January 1, 1945?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person die before January 1, 1945?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer (January 14, 1875–September 4, 1965)Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q17
1 · Guesser asks
Was this person primarily known for work in theology or religion?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in theology or religion?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Musician, theologian and physician, Albert Schweitzer was above all, a true humanitarian.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q18
1 · Guesser asks
Was this person primarily known as a legal scholar, jurist, or political theorist?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as a legal scholar, jurist, or political theorist?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The Quest of the Historical Jesus, a book on which much of his fame as a theological scholar rests; he was also recognized as an internationally known concert organist.Open nobelprize.org (opens in a new tab)
Albert Schweitzer, an Alsatian-German theologian and physician, developed the philosophy of “reverence for life.”Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q19
1 · Guesser asks
Was this person female?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person female?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer built a hospital in Lambaréné ... where he and his wife, Hélène Bresslau, devoted themselves to philanthropic work.Open britannica.com (opens in a new tab)
Role: Missionary surgeon; Founder of Lambaréné (République de Gabon)Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q20
1 · Guesser asks
Did this person die in Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person die in Europe?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Died: Sept. 4, 1965, Lambaréné, Gabon (aged 90).Open britannica.com (opens in a new tab)
Lambaréné, city, west-central Gabon.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q21
1 · Guesser guesses
Karl Polanyi
Austro-Hungarian economic historian and social theorist, author of The Great Transformation
Validator rationale The proposal identifies Karl Polanyi, whereas the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Austro-Hungarian economic historian and social theorist, author of The Great Transformation","name":"Karl Polanyi","question":null}} 2 · Validator returns No
Q22
1 · Guesser guesses
Martin Buber
Austrian-Israeli philosopher and religious thinker best known for his philosophy of dialogue and I and Thou
Validator rationale The proposal identifies Martin Buber, while the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Austrian-Israeli philosopher and religious thinker best known for his philosophy of dialogue and I and Thou","name":"Martin Buber","question":null}} 2 · Validator returns No
Q23
1 · Guesser asks
Did this person die in North America?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person die in North America?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer died on September 4, 1965, and was buried at Lambaréné.Open nobelprize.org (opens in a new tab)
Albert Schweitzer died last night in his jungle hospital here [Lambaréné, Gabon].Open archive.nytimes.com (opens in a new tab)
2 · Answer check returns No
Q24
1 · Guesser asks
Did this person die in South America?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person die in South America?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Died: 4 September 1965, Lambaréné, GabonOpen nobelprize.org (opens in a new tab)
Lambaréné, city, west-central Gabon; Albert Schweitzer was a mission doctor in equatorial Africa.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q25
1 · Guesser asks
Did this person die in Asia?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person die in Asia?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
LAMBARENE, GABON... Albert Schweitzer died last night in his jungle hospital here.Open archive.nytimes.com (opens in a new tab)
Albert Schweitzer... dies at Lambaréné in Gabon.Open sahistory.org.za (opens in a new tab)
2 · Answer check returns No
Q26
1 · Guesser asks
Did this person die in Africa?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person die in Africa?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Died: 4 September 1965, Lambaréné, GabonOpen nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
Albert Schweitzer
Alsatian polymath, theologian, philosopher, physician, and Nobel Peace Prize laureate who died in Lambaréné, Gabon
Validator rationale The proposed identity names Albert Schweitzer and matches the trusted subject's distinctive biography.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Alsatian polymath, theologian, philosopher, physician, and Nobel Peace Prize laureate who died in Lambaréné, Gabon","name":"Albert Schweitzer","question":null}} 2 · Validator returns Yes