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 34 counted questions.
Back to all Albert Schweitzer rounds- Questions
- 34
- Outcome
- Solved
- Format errors
- No errors
- Duration
- 42m 4s
- Round cost
- $1.1944 All 35 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.
Is the subject a real, non-fictional person?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject a real, non-fictional person?"}}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 1965.Open nobelprize.org (opens in a new tab)
Was the subject born after the year 1900?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject born after the year 1900?"}}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)
Is the subject male?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is the subject male?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1912 he and Hélène Bresslau were married, and his wife studied nursing to help her husband.Open kids.britannica.com (opens in a new tab)
Was the subject born before the year 1800?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject born before the year 1800?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer ... Born: 14 January 1875Open nobelprize.org (opens in a new tab)
Did the subject die before the year 1900?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject 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)
Was the subject primarily known as a political or military leader?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject primarily known as a political or military leader?"}}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)
Doctor, Missionary, Philosopher and MusicianOpen nobelprize.org (opens in a new tab)
Was the subject primarily known for contributions to science, mathematics, technology, or engineering?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject primarily known for contributions to science, mathematics, technology, or engineering?"}}Oracle evidence3 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)
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)
His books about theology made his reputation as a major theologian.Open pbs.org (opens in a new tab)
Was the subject primarily known for work in literature, visual art, music, theater, or film?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject primarily known for work in literature, visual art, music, theater, or film?"}}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)
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)
Was the subject primarily known for business, finance, or industry?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject primarily known for business, finance, or industry?"}}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)
Was the subject primarily known as an explorer, adventurer, or navigator?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject primarily known as an explorer, adventurer, or navigator?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer: a life of two halves — Theological Beginnings ... Medical Ends ... establishment of the Albert Schweitzer Hospital ... received the Nobel Peace Prize in 1952.Open history.rcp.ac.uk (opens in a new tab)
Profession: Doctor of Philosophy, Theology and Medicine. Musician and missionary ... nominated for his humanitarian work ... set up a hospital.Open nobelprize.org (opens in a new tab)
Dr. Albert Schweitzer was one of the greatest humanitarians the world has ever known ... his renowned humanitarian work in Africa, including his building of a hospital.Open schweitzer.org (opens in a new tab)
Was the subject primarily known as a religious or spiritual figure?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject primarily known as a religious or spiritual 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 ... 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)
Was the subject primarily known as a philosopher, social theorist, or thinker?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject primarily known as a philosopher, social theorist, or thinker?"}}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)
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)
Was the subject primarily known for medical or healthcare work?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject primarily known for medical or healthcare work?"}}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 1952, primarily for his work at his hospital at Lambaréné.Open lbi.org (opens in a new tab)
In 1905, he became a mission doctor and established a hospital in Lambaréné.Open britannica.com (opens in a new tab)
Did the subject work primarily as a surgeon?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject work primarily as a surgeon?"}}Was the subject born in Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject born in Europe?"}}Oracle evidence1 model-reported source
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)
Was the subject awarded the Nobel Prize in Physiology or Medicine?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject awarded the Nobel Prize in Physiology or Medicine?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Nobel Peace Prize 1952 — Albert SchweitzerOpen 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)
Was the subject associated with psychiatry, neurology, or psychoanalysis?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject associated with psychiatry, neurology, or psychoanalysis?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
The correspondence between Albert Schweitzer and Oskar Pfister reveals Schweitzer's strong interest in psychoanalysis.Open researchgate.net (opens in a new tab)
Sigmund Freud
Austrian neurologist and founder of psychoanalysis
Validator rationale The proposal identifies Sigmund Freud, while the trusted subject is Albert Schweitzer.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Austrian neurologist and founder of psychoanalysis","name":"Sigmund Freud","question":null}}Was the subject born in Switzerland?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject born in Switzerland?"}}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)
Was the subject Austrian?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject Austrian?"}}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)
Albert Schweitzer Born: 14 January 1875, Kaysersberg, Germany (now France)Open nobelprize.org (opens in a new tab)
Was the subject born in Germany?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject 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)
Did the subject die after the year 1920?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject die after the year 1920?"}}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)
Emil Kraepelin
German psychiatrist who shaped modern psychiatric classification, including dementia praecox and manic-depressive illness
Validator rationale The trusted subject is Albert Schweitzer, while the proposal identifies Emil Kraepelin, a different person.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German psychiatrist who shaped modern psychiatric classification, including dementia praecox and manic-depressive illness","name":"Emil Kraepelin","question":null}}Did the subject's best-known contribution involve measuring or recording electrical activity of the brain?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject's best-known contribution involve measuring or recording electrical activity of the brain?"}}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)
He built and ran a hospital at the mission station Lambarene in Gabon.Open nobelprize.org (opens in a new tab)
Berger subsequently published these results in 1929, cementing his status as the ‘founder’ of electroencephalography.Open sciencemuseumgroup.org.uk (opens in a new tab)
Is a disease, syndrome, or medical sign named after the subject?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is a disease, syndrome, or medical sign named after the subject?"}}Did the subject die after the year 1940?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject die after the year 1940?"}}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)
Did the subject emigrate from Germany and live in the United States?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject emigrate from Germany and live in the United States?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Schweitzer’s visit to the Roaring Fork Valley was the one and only time he visited the United States.Open aspenpublicradio.org (opens in a new tab)
The next spring the couple sailed for Africa... He visited the United States in 1949 to speak in Aspen, Colo.Open kids.britannica.com (opens in a new tab)
Did the subject introduce first-rank symptoms used in the diagnosis of schizophrenia?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject introduce first-rank symptoms used in the diagnosis of schizophrenia?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
First-rank symptoms (FRS), proposed by Kurt Schneider in 1939, subsequently became influential in schizophrenia diagnosis.Open academic.oup.com (opens in a new tab)
Albert Schweitzer ... Role: Missionary surgeon; Founder of Lambaréné ... Prize motivation: “for his altruism, reverence for life”.Open nobelprize.org (opens in a new tab)
Did the subject die in Switzerland?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject die in Switzerland?"}}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)
Albert Schweitzer died last night in his jungle hospital here [Lambarene, Gabon].Open archive.nytimes.com (opens in a new tab)
Did the subject die before the year 1945?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject die before the year 1945?"}}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)
Did the subject propose a typology linking body build or physique to temperament?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject propose a typology linking body build or physique to temperament?"}}Was the subject born after the year 1880?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject born after the year 1880?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Albert Schweitzer — Born: 14 January 1875Open nobelprize.org (opens in a new tab)
Did the subject die after the year 1960?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did the subject die after the year 1960?"}}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)
Was the subject born in the 1870s?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was the subject born in the 1870s?"}}Oracle evidence1 model-reported source
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
German-born (Alsace, 1875) physician, theologian, philosopher, and organist who founded the hospital in Lambaréné, Gabon; Nobel Peace Prize laureate 1952; wrote a psychiatric medical dissertation
Validator rationale The proposed identity names Albert Schweitzer and matches the trusted subject’s distinctive biography, including his work in medicine, theology, music, Lambaréné hospital, and 1952 Nobel Peace Prize.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"German-born (Alsace, 1875) physician, theologian, philosopher, and organist who founded the hospital in Lambaréné, Gabon; Nobel Peace Prize laureate 1952; wrote a psychiatric medical dissertation","name":"Albert Schweitzer","question":null}}