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 Schweitzer in 32 counted questions.
Back to all Albert Schweitzer rounds- Questions
- 32
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 13m 39s
- Round cost
- $1.2752 All 33 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 evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer, 90, Dies at His Hospital. He died at 11:30 P.M.Open archive.nytimes.com (opens in a new tab)
Albert Schweitzer – BiographicalOpen nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q2
1 · Guesser asks
Did the person die before the year 1900?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person die before the year 1900?"}}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 No
Q3
1 · Guesser asks
Was the person primarily known as a politician or head of state?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a politician or head of state?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Role: Missionary surgeon; Founder of Lambaréné. The Nobel Prize recognized his altruism, reverence for life, and tireless humanitarian work.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
Q4
1 · Guesser asks
Was the person primarily known as an entertainer (actor, musician, or performer)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as an entertainer (actor, musician, or performer)?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
A book on which much of his fame as a theological scholar rests.Open nobelprize.org (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
Q5
1 · Guesser asks
Was the person primarily known as a scientist, inventor, or mathematician?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a scientist, inventor, or mathematician?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
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)
2 · Answer check returns No
Q6
1 · Guesser asks
Was the person primarily known as a writer or author?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a writer or author?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
Musician, theologian and physician, Albert Schweitzer was above all, a true humanitarian.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
At Lambaréné, Schweitzer was doctor and surgeon in the hospital, pastor of a congregation, administrator of a village, ... writer of scholarly books, ... musician.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q7
1 · Guesser asks
Was the person primarily known as an athlete or sports figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as an athlete or sports figure?"}}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 the person primarily known as a visual artist (painter, sculptor, architect, or designer)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a visual artist (painter, sculptor, architect, or designer)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
Albert Schweitzer was an Alsatian-German theologian, philosopher, organist, and mission doctor in equatorial Africa. He is renowned for his theological work.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q9
1 · Guesser asks
Was the person primarily known as a business leader or entrepreneur?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a business leader or entrepreneur?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
Albert Schweitzer, an Alsatian-German theologian, philosopher, organist, and mission doctor, gained international recognition for his multifaceted work and was awarded the 1952 Nobel Peace Prize.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q10
1 · Guesser asks
Was the person primarily known as a military leader or soldier?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a military leader or soldier?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
He was recognized as a theological scholar and an internationally known concert organist; his work also supported his medical schooling and African hospital.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q11
1 · Guesser asks
Was the person primarily known as a religious or spiritual leader?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a religious or spiritual leader?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
Albert Schweitzer was an Alsatian-German theologian, philosopher, organist, and mission doctor in equatorial Africa; he received the 1952 Nobel Prize for Peace for his work on behalf of the “Brotherhood of Nations.”Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q12
1 · Guesser asks
Was the person primarily known as an activist, social reformer, or civil rights figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as an activist, social reformer, or civil rights figure?"}}Oracle evidence3 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)
Albert Schweitzer was an Alsatian-German theologian, philosopher, organist, and mission doctor in equatorial Africa.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q13
1 · Guesser asks
Was the person primarily known as a criminal or for committing a crime?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a criminal or for committing a crime?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He was an Alsatian-German theologian, philosopher, organist, and mission doctor in equatorial Africa. In 1952, he received the Nobel Peace Prize.Open britannica.com (opens in a new tab)
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)
2 · Answer check returns No
Q14
1 · Guesser asks
Was the person primarily known as an explorer, aviator, or astronaut?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as an explorer, aviator, or astronaut?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer, an Alsatian-German theologian and physician, developed the philosophy of “reverence for life.”Open britannica.com (opens in a new tab)
Much of his fame as a theological scholar rested 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)
2 · Answer check returns No
Q15
1 · Guesser asks
Was the person a member of a royal or noble family?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person a member of a royal or noble family?"}} 2 · Answer check returns Unknown
Q16
1 · Guesser asks
Was the person primarily known as a film or television director or producer?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a film or television director or producer?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
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
Q17
1 · Guesser asks
Was the person primarily known as a scholar or thinker in the humanities or social sciences (e.g., philosopher, psychologist, economist, historian)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a scholar or thinker in the humanities or social sciences (e.g., philosopher, psychologist, economist, historian)?"}}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
Q18
1 · Guesser asks
Was the person primarily known as a journalist, broadcaster, or media personality?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a journalist, broadcaster, or media personality?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
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)
Albert Schweitzer, an Alsatian-German theologian, philosopher, organist, and mission doctor, gained international recognition for his multifaceted work and was awarded the 1952 Nobel Peace Prize.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q19
1 · Guesser asks
Was the person primarily known because of their relationship (spouse, child, parent, sibling) to a more famous person?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known because of their relationship (spouse, child, parent, sibling) to a more famous person?"}}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.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
Q20
1 · Guesser asks
Was the person primarily known as a physician, nurse, or other medical professional?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person primarily known as a physician, nurse, or other medical professional?"}}Oracle evidence3 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)
Much of his fame as a theological scholar rests [on] The Quest of the Historical Jesus; ... he was ... internationally known as a concert organist.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q21
1 · Guesser asks
Was the person female?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person female?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer ... was the son of a Lutheran minister.Open pmc.ncbi.nlm.nih.gov (opens in a new tab)
2 · Answer check returns No
Q22
1 · Guesser asks
Was the person a surgeon?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person a surgeon?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
At Lambaréné, Schweitzer was doctor and surgeon in the hospital.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q23
1 · Guesser asks
Was the person born in the United States?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person born in the United States?"}}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, born in Kaysersberg in 1875.Open visit.alsace (opens in a new tab)
2 · Answer check returns No
Q24
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 evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer was born in Alsace in the then German Empire.Open nobelprize.org (opens in a new tab)
Albert Schweitzer was born on 14th January 1875 in the small village of Kaysersberg in Upper Alsace, North Eastern France.Open philosophynow.org (opens in a new tab)
2 · Answer check returns Yes
Q25
1 · Guesser asks
Did the person die before the year 1950?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person die before the year 1950?"}}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
Q26
1 · Guesser asks
Was the person born in the United Kingdom?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person born in the United Kingdom?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Born: 14 January 1875, Kaysersberg, Germany (now France).Open nobelprize.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 No
Q27
1 · Guesser asks
Was the person born in Germany?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the person born in Germany?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Born: 14 January 1875, Kaysersberg, Germany (now France)Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q28
1 · Guesser guesses
Ferdinand Sauerbruch
German thoracic surgeon (1875–1951) who developed the pressure chamber for chest surgery
Validator rationale The proposal identifies Ferdinand Sauerbruch, whereas the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German thoracic surgeon (1875–1951) who developed the pressure chamber for chest surgery","name":"Ferdinand Sauerbruch","question":null}} 2 · Validator returns No
Q29
1 · Guesser guesses
Werner Forssmann
German surgeon and urologist who performed the first human cardiac catheterization on himself, Nobel Prize in Medicine 1956
Validator rationale The trusted subject is Albert Schweitzer, while the proposed identity is Werner Forssmann, a different person.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German surgeon and urologist who performed the first human cardiac catheterization on himself, Nobel Prize in Medicine 1956","name":"Werner Forssmann","question":null}} 2 · Validator returns No
Q30
1 · Guesser guesses
Rudolf Nissen
German-born surgeon (1896–1981) who devised the Nissen fundoplication and operated on Albert Einstein
Validator rationale The proposal identifies Rudolf Nissen, a surgeon, whereas the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German-born surgeon (1896–1981) who devised the Nissen fundoplication and operated on Albert Einstein","name":"Rudolf Nissen","question":null}} 2 · Validator returns No
Q31
1 · Guesser asks
Did the person spend a significant part of their career working outside Germany?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the person spend a significant part of their career working outside Germany?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1913 ... he founded his hospital at Lambaréné in French Equatorial Africa ... Schweitzer returned to Lambaréné in 1924 and except for relatively short periods of time, spent the remainder of his life there.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q32
1 · Guesser guesses
Ludwig Guttmann
German-born neurosurgeon who fled to Britain, pioneered spinal injury treatment at Stoke Mandeville and founded the Paralympic Games
Validator rationale The trusted subject is Albert Schweitzer, while the proposed identity is Ludwig Guttmann, a different physician and Paralympic pioneer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German-born neurosurgeon who fled to Britain, pioneered spinal injury treatment at Stoke Mandeville and founded the Paralympic Games","name":"Ludwig Guttmann","question":null}} 2 · Validator returns No
G
1 · Guesser guessesNot counted
Albert Schweitzer
Alsace-born (then German Empire) physician and surgeon who founded the hospital at Lambaréné, Gabon; Nobel Peace Prize 1952
Validator rationale The proposed identity exactly matches Albert Schweitzer, including the Lambaréné hospital and 1952 Nobel Peace Prize details.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Alsace-born (then German Empire) physician and surgeon who founded the hospital at Lambaréné, Gabon; Nobel Peace Prize 1952","name":"Albert Schweitzer","question":null}} 2 · Validator returns Yes