Deep20Bench
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7 subjects5 rounds per subject50 question limit
Question answersYesNoUnknown
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Round

Round 4

Round 4

Did not identify Albert Schweitzer after 50 counted questions.

Back to all Albert Schweitzer rounds
Questions
50 Scored as 51
Outcome
Too many format errors
Format errors
Errors found View one example
Duration
22m 21s
Round cost
$0.9942 All 51 turns

Format warning

The model sent replies in the wrong format.

The Guesser sent 1 invalid reply. Each one before the question limit used up a counted turn. The model was only reminded of the required format; it was never told whether its question or guess was correct.

Valid format
98.0%
Format errors
1
Turns used by format errors
1

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.

System message
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.
BEGIN event
{"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 reply rejectedTurn counted

Reply in the wrong format.

Invalid action · fixed format reminder sent

Why this reply was rejectedInvalid action · turn 1

The reply was JSON, but it matched neither the ASK nor the GUESS format.

Recorded type
invalid_action
Turn
1
Counted
Yes · question 1
Feedback
FORMAT_ERROR
What the model returnedExact text from the provider
Attempt 1 · finish stop
{"action":"ASK","question":"Is this person alive?"}
What a valid reply looks likeThe same formats shown to the Guesser
ASK
{"result":{"action":"ASK","description":null,"name":null,"question":"<non-empty yes-or-no property question>"}}
GUESS
{"result":{"action":"GUESS","description":"<non-empty identifying description>","name":"<non-empty candidate name>","question":null}}

A reply must match one of these formats exactly. Text fields in use must not be empty; unused fields must be JSON null.

2 · System responseFORMAT
Q2
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.

2 · Answer check returns No
Q3
1 · Guesser asks

Is this person male?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person male?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns Yes
Q4
1 · Guesser asks

Is this person known primarily for work in science or technology?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known primarily for work in science or technology?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q5
1 · Guesser asks

Is this person known primarily for work in politics or government?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known primarily for work in politics or government?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02
The award to Albert Schweitzer of the Nobel Peace Prize symbolized the near-universal admiration he attained through his life of devotion as a medical missionary in Africa.
Open ebsco.com
2 · Answer check returns No
Q6
1 · Guesser asks

Is this person known for work in sports?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known for work in sports?"}}
2 · Answer check returns Unknown
Q7
1 · Guesser asks

Is this person known for work in the arts or entertainment (music, film, literature, painting)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known for work in the arts or entertainment (music, film, literature, painting)?"}}
Oracle evidence1 model-reported source

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns Yes
Q8
1 · Guesser asks

Is this person best known as a musician (singer, composer, or instrumentalist)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a musician (singer, composer, or instrumentalist)?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q9
1 · Guesser asks

Is this person best known for work in film or television (actor, director)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for work in film or television (actor, director)?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q10
1 · Guesser asks

Is this person best known as a writer of literature?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a writer of literature?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02
Dr. Schweitzer became especially famous for giving benefit concerts and lectures in Europe as a means of fundraising for his hospital back in Africa.
Open pbs.org
2 · Answer check returns No
Q11
1 · Guesser asks

Is this person best known as a painter or visual artist?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a painter or visual artist?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q12
1 · Guesser asks

Is this person best known as an architect?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as an architect?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q13
1 · Guesser asks

Is this person best known as a comedian or performer of live comedy?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a comedian or performer of live comedy?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q14
1 · Guesser asks

Is this person best known for dance or stage performance such as ballet or theater?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for dance or stage performance such as ballet or theater?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01
The award to Albert Schweitzer of the Nobel Peace Prize symbolized the near-universal admiration he attained through his life of devotion as a medical missionary in Africa.
Open ebsco.com
2 · Answer check returns No
Q15
1 · Guesser asks

Is this person best known as a fashion designer?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a fashion designer?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q16
1 · Guesser asks

Is this person best known as a photographer?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a photographer?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q17
1 · Guesser asks

Is this person best known as a chef or in the culinary arts?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a chef or in the culinary arts?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q18
1 · Guesser asks

Is this person best known for creating comics or cartoons (comic book artist, animator, or cartoonist)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for creating comics or cartoons (comic book artist, animator, or cartoonist)?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01
Albert Schweitzer was an Alsatian-German theologian, philosopher, organist, and mission doctor... He is renowned for his theological work... and establishing a hospital in Lambaréné, Gabon.
Open britannica.com
2 · Answer check returns No
Q19
1 · Guesser asks

Is this person best known as a magician or illusionist?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a magician or illusionist?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q20
1 · Guesser asks

Is this person best known for work behind the camera in film, such as a producer, screenwriter, or cinematographer?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for work behind the camera in film, such as a producer, screenwriter, or cinematographer?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q21
1 · Guesser asks

Is this person best known as a sculptor?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a sculptor?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q22
1 · Guesser asks

Is this person best known as a poet?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a poet?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q23
1 · Guesser asks

Is this person best known as a playwright?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a playwright?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q24
1 · Guesser asks

Is this person best known as an opera singer or classical vocalist?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as an opera singer or classical vocalist?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q25
1 · Guesser asks

Is this person best known for work in radio or podcasting?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for work in radio or podcasting?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02
Schweitzer was a renowned medical missionary and became especially famous for benefit concerts and lectures in Europe to fund his hospital in Africa.
Open pbs.org
2 · Answer check returns No
Q26
1 · Guesser asks

Is this person best known for video games (designer, voice actor, or content creator)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for video games (designer, voice actor, or content creator)?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q27
1 · Guesser asks

Is this person best known as an author of nonfiction books (such as history, philosophy, or essays)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as an author of nonfiction books (such as history, philosophy, or essays)?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q28
1 · Guesser asks

Is this person best known as a conductor of orchestras?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a conductor of orchestras?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q29
1 · Guesser asks

Is this person best known as a showman, impresario, or circus/carnival figure?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a showman, impresario, or circus/carnival figure?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q30
1 · Guesser asks

Is this person best known for work in advertising or graphic design?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for work in advertising or graphic design?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01
Albert Schweitzer was an Alsatian-German theologian, philosopher, organist, and mission doctor in equatorial Africa; he built a hospital in Lambaréné and received the Nobel Peace Prize.
Open britannica.com
2 · Answer check returns No
Q31
1 · Guesser asks

Is this person best known as a journalist or media personality?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a journalist or media personality?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 01
The award to Albert Schweitzer of the Nobel Peace Prize symbolized the near-universal admiration he attained through his life of devotion as a medical missionary in Africa.
Open ebsco.com
Source 03
At Lambaréné, Schweitzer was doctor and surgeon in the hospital, pastor of a congregation, administrator of a village, writer of scholarly books, commentator on contemporary history, musician, host to countless visitors.
Open nobelprize.org
2 · Answer check returns No
Q32
1 · Guesser asks

Is this person best known for work created before the year 1900?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for work created before the year 1900?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02
Albert Schweitzer was awarded the Nobel Peace Prize for his altruism, reverence for life, and tireless humanitarian work; his role was Missionary surgeon and Founder of Lambaréné.
Open nobelprize.org
2 · Answer check returns No
Q33
1 · Guesser asks

Is this person best known primarily for creating some form of visual art?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known primarily for creating some form of visual art?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q34
1 · Guesser asks

Is this person best known for street art or graffiti (for example as a muralist)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for street art or graffiti (for example as a muralist)?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q35
1 · Guesser asks

Is this person best known as a film composer or writer of movie scores?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a film composer or writer of movie scores?"}}
Oracle evidence3 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q36
1 · Guesser asks

Did this person compete professionally in an athletic sport?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person compete professionally in an athletic sport?"}}
2 · Answer check returns Unknown
Q37
1 · Guesser asks

Is this person widely regarded as a performer who entertains live audiences?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person widely regarded as a performer who entertains live audiences?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02
He made a name for himself in the musical world... and was in demand in Paris, where he accompanied the choir and orchestra... performing at the Salle Gaveau several times a year.
Open schweitzer.org
2 · Answer check returns Yes
Q38
1 · Guesser asks

Is this person associated with professional wrestling?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person associated with professional wrestling?"}}
2 · Answer check returns Unknown
Q39
1 · Guesser asks

Is this person known for performing in circuses or stunt performances?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known for performing in circuses or stunt performances?"}}
2 · Answer check returns Unknown
Q40
1 · Guesser asks

Was this person born in the United States?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in the United States?"}}
Oracle evidence1 model-reported source

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q41
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.

2 · Answer check returns Yes
Q42
1 · Guesser guesses

Harry Houdini

Hungarian-born American escapologist and stunt performer famous for his sensational escape acts

Validator rationale The proposal identifies Harry Houdini, a different person from Albert Schweitzer.

Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Hungarian-born American escapologist and stunt performer famous for his sensational escape acts","name":"Harry Houdini","question":null}}
2 · Validator returns No
Q43
1 · Guesser guesses

Marcel Marceau

French mime artist famous for his silent stage persona Bip the Clown and mastery of pantomime

Validator rationale The proposal identifies Marcel Marceau, while the trusted subject is Albert Schweitzer.

Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"French mime artist famous for his silent stage persona Bip the Clown and mastery of pantomime","name":"Marcel Marceau","question":null}}
2 · Validator returns No
Q44
1 · Guesser asks

Is this person best known for magic performances (as a stage magician)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known for magic performances (as a stage magician)?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q45
1 · Guesser asks

Is this person known primarily as a singer of popular music who performs live?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known primarily as a singer of popular music who performs live?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q46
1 · Guesser asks

Is this person known as an actor who performs in theater?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known as an actor who performs in theater?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q47
1 · Guesser asks

Is this person known for acrobatic or aerial performances?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known for acrobatic or aerial performances?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns No
Q48
1 · Guesser asks

Is this person best known as a clown?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person best known as a clown?"}}
Oracle evidence2 model-reported sources

The Oracle reported these excerpts and URLs. They are not independently checked.

Source 02
The award to Albert Schweitzer of the Nobel Peace Prize symbolized the near-universal admiration he attained through his life of devotion as a medical missionary in Africa.
Open ebsco.com
2 · Answer check returns No
Q49
1 · Guesser asks

Is this person known for performances involving dance or choreographed movement?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known for performances involving dance or choreographed movement?"}}
2 · Answer check returns Unknown
Q50
1 · Guesser asks

Is this person known for performing as an instrumental musician in live concerts?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is this person known for performing as an instrumental musician in live concerts?"}}
Oracle evidence1 model-reported source

The Oracle reported these excerpts and URLs. They are not independently checked.

2 · Answer check returns Yes