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 25 counted questions.
Back to all Albert Schweitzer rounds- Questions
- 25
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 8m 18s
- Round cost
- $0.5013 All 26 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 still alive?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person still alive?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Born: 14 January 1875 ... Died: 4 September 1965, Lambaréné, GabonOpen nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q2
1 · Guesser asks
Did this person live primarily in the 20th century (1900s)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person live primarily in the 20th century (1900s)?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer Born: 14 January 1875 ... Died: 4 September 1965Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q3
1 · Guesser asks
Was this person a man?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person a man?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer ... Gender: MaleOpen nndb.com (opens in a new tab)
2 · Answer check returns Yes
Q4
1 · Guesser asks
Is this person primarily known for work in politics or government (including as a head of state or political leader)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person primarily known for work in politics or government (including as a head of state or political leader)?"}}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)
Dr. Albert Schweitzer was a physician, philosopher, theologian, organist and humanitarian ... known for his charitable work including opening a hospital in Africa.Open interlochenpublicradio.org (opens in a new tab)
2 · Answer check returns No
Q5
1 · Guesser asks
Is this person primarily known for work in the arts or entertainment (such as music, film, literature, or visual art)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person primarily known for work in the arts or entertainment (such as music, film, literature, or visual art)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The Nobel Peace Prize 1952 was awarded to Albert Schweitzer “for his altruism, reverence for life, and tireless humanitarian work.”Open nobelprize.org (opens in a new tab)
He was also a gifted musician and interpreter of Bach. He gave numerous organ concerts in Europe to finance the hospital in Africa.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q6
1 · Guesser asks
Is this person primarily known for work in science, mathematics, or invention?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person primarily known for work in science, mathematics, or invention?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
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
Q7
1 · Guesser asks
Is this person primarily known as an athlete or sports figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this 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.
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work. He was a minister turned doctor in Africa, theologian and philosopher.Open nobelprize.org (opens in a new tab)
Profession: Doctor of Philosophy, Theology and Medicine. Musician and missionary. He was nominated for his humanitarian work and set up a hospital in Lambaréné.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q8
1 · Guesser asks
Is this person primarily known as a business figure or entrepreneur?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person primarily known as a business figure or entrepreneur?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Alsatian-German theologian, philosopher and physicianOpen britannica.com (opens in a new tab)
Profession: Doctor of Philosophy, Theology and Medicine. Musician and missionaryOpen nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q9
1 · Guesser asks
Is this person primarily known as a religious or spiritual leader or figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person primarily known as a religious or spiritual leader or figure?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer was a physician, Protestant theologian, organist, and missionary, who was awarded the Nobel Peace Prize for 1952, primarily for his work at his hospital at Lambaréné.Open lbi.org (opens in a new tab)
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands.Open artuk.org (opens in a new tab)
2 · Answer check returns No
Q10
1 · Guesser asks
Is this person primarily known as a military figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person primarily known as a military figure?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Doctor, Missionary, Philosopher and Musician ... he built and ran a hospital at the mission station Lambarene in Gabon.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)
Schweitzer dedicated the last six decades of his life to medicine and to a hospital he founded ... in Lambaréné, Gabon.Open press.jhu.edu (opens in a new tab)
2 · Answer check returns No
Q11
1 · Guesser asks
Is this person primarily known as an activist or social reformer (e.g., for civil rights or humanitarian causes)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person primarily known as an activist or social reformer (e.g., for civil rights or humanitarian causes)?"}}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)
Albert Schweitzer was nominated for his humanitarian work ... In 1913 he arrived at Lambaréné where he and his wife set up a hospital.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q12
1 · Guesser asks
Was this person American (from the United States)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person American (from the United States)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Although Schweitzer considered himself French — and would formally take French citizenship after World War IOpen mayoclinicproceedings.org (opens in a new tab)
During World War I Schweitzer and his wife, though French, were interned in France as German subjects.Open kids.britannica.com (opens in a new tab)
2 · Answer check returns No
Q13
1 · Guesser asks
Was this person from Africa?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person from Africa?"}}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... he built and ran a hospital ... in Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
Albert Schweitzer is born ... in Upper-Alsace, Germany (now Haut-Rhin, France).Open history.com (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser asks
Was this person from Asia (including South Asia and the Middle East)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person from Asia (including South Asia and the Middle East)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer ... Born: 14 January 1875, Kaysersberg, Germany (now France).Open nobelprize.org (opens in a new tab)
Albert Schweitzer is born ... in Upper-Alsace, Germany (now Haut-Rhin, France).Open history.com (opens in a new tab)
2 · Answer check returns No
Q15
1 · Guesser asks
Was this person from Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person from Europe?"}}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)
Schweitzer was born in Alsace in the then German Empire.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q16
1 · Guesser asks
Was this person killed or did they die as a direct result of persecution, imprisonment, or violence?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person killed or did they die as a direct result of persecution, imprisonment, or violence?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
His death was attributed to circulatory trouble brought on by his advanced age.Open archive.nytimes.com (opens in a new tab)
2 · Answer check returns No
Q17
1 · Guesser asks
Was this person British?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person British?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
During World War I Schweitzer and his wife, though French, were interned in France as German subjects.Open kids.britannica.com (opens in a new tab)
Schweitzer considered himself French — and would formally take French citizenship after World War I.Open mayoclinicproceedings.org (opens in a new tab)
2 · Answer check returns No
Q18
1 · Guesser asks
Was this person primarily active in the second half of the 20th century (after 1950)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily active in the second half of the 20th century (after 1950)?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1913 he arrived at Lambaréné where he and his wife set up a hospital. He spent most of his life at Lambaréné.Open nobelprize.org (opens in a new tab)
Albert Schweitzer ... Born: 14 January 1875 ... Died: 4 September 1965 ... Nobel Peace Prize 1952.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q19
1 · Guesser asks
Was this person's activism primarily focused on workers' rights or the labor movement?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person's activism primarily focused on workers' rights or the labor movement?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
for his altruism, reverence for life, and tireless humanitarian workOpen nobelpeaceprize.org (opens in a new tab)
Albert Schweitzer gave a speech condemning atomic bombsOpen disarmament.blogs.pace.edu (opens in a new tab)
2 · Answer check returns No
Q20
1 · Guesser asks
Was this person's activism primarily focused on peace or opposition to war?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person's activism primarily focused on peace or opposition to war?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer dedicated the last six decades of his life to medicine and to a hospital he founded... in French Equatorial Africa.Open press.jhu.edu (opens in a new tab)
He wanted to alleviate suffering, and accordingly studied medicine. Together with his wife... he built and ran a hospital at the mission station Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q21
1 · Guesser asks
Was this person's activism primarily focused on the rights or welfare of a particular ethnic or religious group?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person's activism primarily focused on the rights or welfare of a particular ethnic or religious group?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
His humanitarian work helped make the idea of brotherhood between men and nations a living one; he wanted to alleviate suffering and built and ran a hospital at Lambarene.Open nobelprize.org (opens in a new tab)
Schweitzer dedicated the last six decades of his life to medicine and to a hospital he founded in French Equatorial Africa.Open press.jhu.edu (opens in a new tab)
Albert Schweitzer spoke out against nuclear weapons testing in 1957 and 1958.Open albany.edu (opens in a new tab)
2 · Answer check returns No
Q22
1 · Guesser asks
Was this person's activism primarily focused on women's rights or suffrage?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person's activism primarily focused on women's rights or suffrage?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer dedicated the last six decades of his life to medicine and to a hospital he founded with his wife in French Equatorial Africa.Open press.jhu.edu (opens in a new tab)
Albert Schweitzer received the Nobel Prize for his tireless humanitarian work; together with his wife, he built and ran a hospital at Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
2 · Answer check returns No
Q23
1 · Guesser asks
Was this person's activism primarily focused on humanitarian relief or aid to refugees?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person's activism primarily focused on humanitarian relief or aid to refugees?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
He dedicated himself to medical studies, seeking to build and run a hospital in Africa to alleviate suffering. The hospital in Lambaréné became his life’s work.Open nobelprize.org (opens in a new tab)
Albert Schweitzer was nominated for his humanitarian work... he and his wife set up a hospital.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
Q24
1 · Guesser guesses
Fridtjof Nansen
Norwegian explorer and humanitarian, League of Nations High Commissioner for Refugees and creator of the Nansen passport
Validator rationale The trusted subject is Albert Schweitzer, while the proposal identifies Fridtjof Nansen.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Norwegian explorer and humanitarian, League of Nations High Commissioner for Refugees and creator of the Nansen passport","name":"Fridtjof Nansen","question":null}} 2 · Validator returns No
Q25
1 · Guesser asks
Did this person receive the Nobel Peace Prize?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person receive the Nobel Peace Prize?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
The Nobel Peace Prize 1952 was awarded to Albert Schweitzer ... Albert Schweitzer received his Nobel Prize one year later, in 1953.Open nobelprize.org (opens in a new tab)
2 · Answer check returns Yes
G
1 · Guesser guessesNot counted
Albert Schweitzer
Alsatian physician and humanitarian who founded a hospital in Lambaréné and won the 1952 Nobel Peace Prize
Validator rationale The proposed identity exactly matches Albert Schweitzer and the distinctive biographical details align with the trusted subject.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Alsatian physician and humanitarian who founded a hospital in Lambaréné and won the 1952 Nobel Peace Prize","name":"Albert Schweitzer","question":null}} 2 · Validator returns Yes