Deep20Bench
v1.0Previous

Benchmark edition

Edition 1.0 settings

7 subjects5 rounds per subject50 question limit
Question answersYesNoUnknown
What changed
Source
Menu
Round

Round 2

Round 2

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
15m 15s
Round cost
$0.5579 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":"BKXG3AZI"}

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 JSON · fixed format reminder sent

Why this reply was rejectedInvalid JSON · turn 1

The reply was not one complete, valid JSON object.

Recorded type
invalid_json
Turn
1
Counted
Yes · question 1
Feedback
FORMAT_ERROR
What the model returnedExact text from the provider
Attempt 1 · finish stop
{"result":{"action":"ASK","question":"Is the person alive today?","name":null,"description":null}}

{"result":{"action":"ASK","question":"Is the person alive today?","name":null,"description":null}}
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

Was this person born before the year 1900?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born before the year 1900?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns Yes
Q3
1 · Guesser asks

Was this person male?

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

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

2 · Answer check returns Yes
Q4
1 · Guesser asks

Was this person primarily known for political leadership or government service?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for political leadership or government service?"}}
Oracle evidence2 model-reported sources

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

Source 01
Albert Schweitzer was awarded the Nobel Peace Prize for his philosophy of “reverence for life” and tireless humanitarian work. A theologian, Schweitzer changed his course ... to become a doctor in Africa.
Open nobelprize.org
2 · Answer check returns No
Q5
1 · Guesser asks

Was this person primarily known for work in science or mathematics?

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

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

2 · Answer check returns No
Q6
1 · Guesser asks

Was this person primarily known as a writer or poet?

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

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

Source 02
Although he was highly gifted in science, theology, and music and as an author, Schweitzer dedicated the last six decades of his life to medicine and to a hospital he founded.
Open press.jhu.edu
2 · Answer check returns No
Q7
1 · Guesser asks

Was this person a professional musician or composer?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person a professional musician or composer?"}}
Oracle evidence2 model-reported sources

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

Source 01
From his young manhood to his middle eighties, recognized as a concert organist, internationally known. From his professional engagements he earned funds for his education.
Open peacelab.org
2 · Answer check returns Yes
Q8
1 · Guesser asks

Was this person primarily known for classical music?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for classical music?"}}
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

Was this person primarily known for jazz music?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for jazz music?"}}
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

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
Q11
1 · Guesser asks

Was this person primarily known as a singer or performer rather than as a composer or instrumentalist?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as a singer or performer rather than as a 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
Q12
1 · Guesser asks

Was this person primarily known for composing or arranging music rather than performing it?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for composing or arranging music rather than performing it?"}}
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

Was this person primarily known as a conductor or bandleader?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as a conductor or bandleader?"}}
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

Was this person primarily known as an instrumentalist who played the piano?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as an instrumentalist who played the piano?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q15
1 · Guesser asks

Was this person primarily known as a guitarist or guitar player?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as a guitarist or guitar player?"}}
Oracle evidence2 model-reported sources

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

Source 01
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands. He was awarded the Nobel Peace Prize in 1952.
Open artuk.org
2 · Answer check returns No
Q16
1 · Guesser asks

Was this person primarily known for playing a string instrument other than guitar or piano?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for playing a string instrument other than guitar or piano?"}}
Oracle evidence3 model-reported sources

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

Source 01
A world-renowned organist, his biography of Bach (1908) revived interest in the composer. He is best known for founding the mission hospital at Lambaréné.
Open artuk.org
2 · Answer check returns No
Q17
1 · Guesser asks

Was this person primarily known for playing a wind instrument, such as a flute, clarinet, saxophone, or trumpet?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for playing a wind instrument, such as a flute, clarinet, saxophone, or trumpet?"}}
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

Was this person primarily known for playing percussion instruments, such as drums?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for playing percussion instruments, such as drums?"}}
Oracle evidence2 model-reported sources

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

Source 01
He is best known for founding the mission hospital at Lambaréné... A world-renowned organist, his biography of Bach revived interest in the composer.
Open artuk.org
2 · Answer check returns No
Q19
1 · Guesser asks

Was this person primarily known for folk or traditional music?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for folk or traditional music?"}}
Oracle evidence2 model-reported sources

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

Source 02
Schweitzer's towering reputation as a humanitarian and theologian has tended to overshadow his importance as organist and musicologist... works by Johann Sebastian Bach.
Open allmusic.com
2 · Answer check returns No
Q20
1 · Guesser asks

Was this person primarily known for playing the organ?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for playing the organ?"}}
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

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
Q22
1 · Guesser asks

Was this person primarily known for playing the accordion or harmonica?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for playing the accordion or harmonica?"}}
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

Was this person primarily associated with opera?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily associated with opera?"}}
Oracle evidence2 model-reported sources

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

Source 01
Albert Schweitzer was a physician, Protestant theologian, organist, and missionary ... primarily for his work at his hospital at Lambaréné.
Open lbi.org
2 · Answer check returns No
Q24
1 · Guesser asks

Was this person primarily known for music theory, music criticism, or music education rather than for performing or composing music?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for music theory, music criticism, or music education rather than for performing or composing music?"}}
Oracle evidence2 model-reported sources

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

Source 02
Schweitzer's towering reputation as a humanitarian and theologian has tended to overshadow his importance as organist and musicologist, especially in the study and performance of works by Johann Sebastian Bach.
Open allmusic.com
2 · Answer check returns No
Q25
1 · Guesser asks

Was this person born before 1800?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born before 1800?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns No
Q26
1 · Guesser asks

Was this person primarily associated with popular music or music hall entertainment?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily associated with popular music or music hall entertainment?"}}
Oracle evidence2 model-reported sources

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

Source 01
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands. A world-renowned organist, his biography of Bach revived interest in the composer.
Open artuk.org
2 · Answer check returns No
Q27
1 · Guesser asks

Was this person born in the United Kingdom?

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

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

2 · Answer check returns No
Q28
1 · Guesser asks

Was this person born in Russia or the Russian Empire?

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

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

2 · Answer check returns No
Q29
1 · Guesser asks

Was this person born in France?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in France?"}}
2 · Answer check returns Unknown
Q30
1 · Guesser asks

Was this person born in Germany?

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

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

2 · Answer check returns Yes
Q31
1 · Guesser asks

Was this person primarily known for visual art, such as painting, sculpture, or photography?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for visual art, such as painting, sculpture, or photography?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q32
1 · Guesser asks

Was this person primarily known for inventing or designing musical instruments?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for inventing or designing musical instruments?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q33
1 · Guesser asks

Was this person born after 1850?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born after 1850?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns Yes
Q34
1 · Guesser asks

Was this person primarily known for composing music for films or theatrical productions?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for composing music for films or theatrical productions?"}}
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

Was this person born after 1875?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born after 1875?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns No
Q36
1 · Guesser asks

Was this person primarily associated with military music or military bands?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily associated with military music or military bands?"}}
Oracle evidence2 model-reported sources

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

Source 01
Albert Schweitzer was a physician, Protestant theologian, organist, and missionary, awarded the Nobel Peace Prize primarily for his work at his hospital at Lambaréné.
Open lbi.org
2 · Answer check returns No
Q37
1 · Guesser asks

Was this person also primarily known as an actor or stage performer?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person also primarily known as an actor or stage performer?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q38
1 · Guesser asks

Was this person primarily known as a music publisher, impresario, or music-industry entrepreneur?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known as a music publisher, impresario, or music-industry entrepreneur?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q39
1 · Guesser asks

Was this person primarily associated with experimental, avant-garde, or electronic music?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily associated with experimental, avant-garde, or electronic music?"}}
Oracle evidence2 model-reported sources

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

Source 01
He is best known for founding the mission hospital at Lambaréné... A world-renowned organist, his biography of Bach (1908) revived interest in the composer.
Open artuk.org
Source 02
Albert Schweitzer's towering reputation as a humanitarian and theologian has tended to overshadow his importance as organist and musicologist... especially in the study and performance of works by Johann Sebastian Bach.
Open allmusic.com
2 · Answer check returns No
Q40
1 · Guesser asks

Was this person primarily known for composing or performing sacred or religious music?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for composing or performing sacred or religious music?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q41
1 · Guesser asks

Was this person primarily associated with dance music or ballroom music?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily associated with dance music or ballroom music?"}}
Oracle evidence2 model-reported sources

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

Source 01
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands. A world-renowned organist, his biography of Bach revived interest in the composer.
Open npg.org.uk
2 · Answer check returns No
Q42
1 · Guesser asks

Was this person born in Bavaria or a Bavarian state before German unification?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in Bavaria or a Bavarian state before German unification?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q43
1 · Guesser asks

Was this person born in Prussia or the Kingdom of Prussia?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in Prussia or the Kingdom of Prussia?"}}
Oracle evidence2 model-reported sources

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

Source 02
After the Frankfurt Treaty ... Alsace formed part of the so-called Reichsland Alsace-Lorraine, a ‘state’ that ‘belonged’ to the German Reich and never gained full emancipation as one of Germany’s federal states.
Open research.ucc.ie
2 · Answer check returns No
Q44
1 · Guesser asks

Was this person born in Saxony or a Saxon state?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in Saxony or a Saxon state?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns No
Q45
1 · Guesser asks

Was this person born in Baden, in the former Grand Duchy of Baden?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in Baden, in the former Grand Duchy of Baden?"}}
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

Was this person primarily known for religious or theological work?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for religious or theological work?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns No
Q47
1 · Guesser asks

Was this person primarily known for composing chamber music?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for composing chamber music?"}}
Oracle evidence2 model-reported sources

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

Source 01
He is best known for founding the mission hospital at Lambaréné, providing medical aid to thousands. He was awarded the Nobel Peace Prize in 1952.
Open artuk.org
2 · Answer check returns No
Q48
1 · Guesser asks

Was this person born in Württemberg or a Württemberg state?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in Württemberg or a Württemberg state?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q49
1 · Guesser asks

Was this person born in Hesse or a Hessian state?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person born in Hesse or a Hessian state?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns No
Q50
1 · Guesser asks

Was this person primarily known for philosophy, psychology, or social theory?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for philosophy, psychology, or social theory?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns No