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.
- Questions
- 35
- Outcome
- Solved
- Format errors
- Errors found View one example
- Duration
- 15m 25s
- Round cost
- $0.5353 All 36 turns
Format warning
The model sent replies in the wrong format.
The Guesser sent 2 invalid replies. 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
- 94.4%
- Format errors
- 2
- Turns used by format errors
- 2
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":"AMZAISLM"}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
{"action":"ASK","question":"Is this person male?"}{"result":{"action":"ASK","description":null,"name":null,"question":"<non-empty yes-or-no property question>"}}{"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.
Genghis Khan, the founder of the Mongol Empire, died on August 18, 1227, at his summer residence in Gansu, China.Open ebsco.com (opens in a new tab)
2 · Answer check returns No
Q3
1 · Guesser asks
Did this person die in the 20th century (between 1901 and 2000)?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person die in the 20th century (between 1901 and 2000)?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan, the founder of the Mongol Empire, died on August 18, 1227.Open ebsco.com (opens in a new tab)
2 · Answer check returns No
Q4
1 · Guesser asks
Was this person primarily known for work in politics or government?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person primarily known for work in politics or government?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan was best known for unifying the Mongolian steppe under a massive empire; he was a Mongolian warrior-ruler.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q5
1 · Guesser asks
Was this person a head of state or head of government of their country?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person a head of state or head of government of their country?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1206 an assembly of leaders declared him universal emperor of the Mongolian steppe.Open britannica.com (opens in a new tab)
Mongol leader Genghis Khan ... rose from humble beginnings to establish the largest land empire in history.Open history.com (opens in a new tab)
2 · Answer check returns Yes
Q6
1 · Guesser asks
Was this person the head of state or government of a country in Europe?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of a country in Europe?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Title / Office: khan (1206-1227), Mongol empire.Open britannica.com (opens in a new tab)
When Genghis Khan returned to Mongolia in 1225, he controlled a huge swath of territory from the Sea of Japan to the Caspian Sea.Open history.com (opens in a new tab)
2 · Answer check returns No
Q7
1 · Guesser asks
Was this person the head of state or government of a country in the Americas?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of a country in the Americas?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan was a warrior and ruler ... who brought all the nomadic tribes of Mongolia under the rule of himself and his family ... He then turned his attention toward ... peoples beyond the borders of his nomadic realm.Open britannica.com (opens in a new tab)
Genghis Khan was a conqueror who brought together the wandering peoples of central Asia. He made their lands into the state of Mongolia.Open kids.britannica.com (opens in a new tab)
2 · Answer check returns No
Q8
1 · Guesser asks
Was this person the head of state or government of a country in Asia?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of a country in Asia?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan was a warrior and ruler ... who brought all the nomadic tribes of Mongolia under the rule of himself and his family in a rigidly disciplined military state.Open britannica.com (opens in a new tab)
He then extended his empire across Asia to the Adriatic Sea.Open britannica.com (opens in a new tab)
2 · Answer check returns Yes
Q9
1 · Guesser asks
Was this person the head of state or government of a country in the Middle East?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of a country in the Middle East?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Title / Office: khan (1206–1227), Mongol empire.Open britannica.com (opens in a new tab)
Under Möngke, the main new conquest was in the Middle East. Hülegü, a brother of Möngke, conquered what are now Iran, Iraq, and Syria in the 1250s.Open kids.britannica.com (opens in a new tab)
2 · Answer check returns No
Q10
1 · Guesser asks
Was this person the head of state or government of China?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of China?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1279 he completed the conquest of China and became the first Yuan ruler of all of China.Open britannica.com (opens in a new tab)
In 1206 he is accepted as emperor of all the steppe people and is proclaimed Genghis Khan.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q11
1 · Guesser asks
Was this person the head of state or government of Japan?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of Japan?"}}Oracle evidence3 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1206 an assembly of leaders declared him universal emperor of the Mongolian steppe.Open britannica.com (opens in a new tab)
Emperor Go-Horikawa was the 86th emperor of Japan; Emperor of Japan (1221–1232).Open en.wikipedia.org (opens in a new tab)
Title / Office: khan (1206–1227), Mongol empire.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q12
1 · Guesser asks
Was this person the head of state or government of India?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of India?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan was a Mongolian warrior-ruler who consolidated tribes into a unified Mongolia.Open britannica.com (opens in a new tab)
Sultan Iltutmish (reigned 1211–36) had made his permanent capital at Delhi and gained firm control of the main urban strategic centers of the North Indian Plain.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q13
1 · Guesser asks
Was this person the head of state or government of South Korea?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of South Korea?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan held the title of khan of the Mongol Empire from 1206 to 1227 and died on August 18, 1227.Open britannica.com (opens in a new tab)
South Korea was established in 1948 as a democratic republic; its president is head of state and government.Open kids.britannica.com (opens in a new tab)
2 · Answer check returns No
Q14
1 · Guesser asks
Was this person the head of state or government of a Southeast Asian country?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of a Southeast Asian country?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan was a warrior and ruler ... who brought all of the nomadic tribes of Mongolia under the rule of himself and his family.Open britannica.com (opens in a new tab)
Mongol invasion of Java ... 1293 ... Kublai Khan's campaigns ... Result: Majapahit victory.Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns No
Q15
1 · Guesser asks
Was this person the head of state or government of Pakistan?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of Pakistan?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The death of Genghis Khan ... occurred on August 18, 1227.Open ebsco.com (opens in a new tab)
Pakistan became independent on August 14–15, 1947; Muhammad Ali Jinnah took the oath as the first governor-general of the country.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q16
1 · Guesser asks
Was this person the head of state or government of a country in Central Asia?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of a country in Central Asia?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan brought all the nomadic tribes of Mongolia under the rule of himself and his family in a rigidly disciplined military state.Open britannica.com (opens in a new tab)
Born ... on the steppes of Central Asia, Genghis Khan became famous as the Mongolian warrior-ruler who built the largest land empire in the world.Open history.com (opens in a new tab)
2 · Answer check returns Yes
Q17
1 · Guesser asks
Was this person the head of state of Turkmenistan?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state of Turkmenistan?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan died on August 18, 1227.Open britannica.com (opens in a new tab)
Turkmenistan declared its independence on October 27, 1991. Saparmyrat Niyazov became the first president of the new republic.Open 2001-2009.state.gov (opens in a new tab)
2 · Answer check returns No
Q18
1 · Guesser asks
Was this person the head of state of Uzbekistan?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state of Uzbekistan?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Title / Office: khan (1206–1227), Mongol empire; Died: August 18, 1227.Open britannica.com (opens in a new tab)
Below is the list of leaders of present-day Uzbekistan since the establishment of Uzbek SSR in 1924.Open en.wikipedia.org (opens in a new tab)
2 · Answer check returns No
Q19
1 · Guesser asks
Was this person the head of state of Kazakhstan?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state of Kazakhstan?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan ... died August 18, 1227.Open britannica.com (opens in a new tab)
Kazakhstan declared independence on December 16, 1991.Open 2009-2017.state.gov (opens in a new tab)
2 · Answer check returns No
Q20
1 · Guesser asks
Was this person the head of state of Tajikistan?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state of Tajikistan?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan ... died August 18, 1227.Open britannica.com (opens in a new tab)
On 9 September 1991 ... [Tajikistan] achieved real independence.Open mvd.tj (opens in a new tab)
2 · Answer check returns No
Q21
1 · Guesser asks
Was this person the head of state of Kyrgyzstan?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state of Kyrgyzstan?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
The list identifies Askar Akayev as President of Kyrgyzstan beginning October 27, 1990.Open en.wikipedia.org (opens in a new tab)
Genghis Khan dies in 1227.Open history.com (opens in a new tab)
2 · Answer check returns No
Q22
1 · Guesser asks
Was this person the head of state or government of Afghanistan?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of Afghanistan?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan invaded the eastern part of ʿAlāʾ al-Dīn’s empire in 1219.Open britannica.com (opens in a new tab)
Jalāl al-Dīn Mingburnu rallied the Afghan highlanders at Parwan ... and inflicted a crushing defeat on the Mongols under Kutikonian. Genghis Khan, who was then at Herāt, hastened to avenge the defeat.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q23
1 · Guesser asks
Was this person the head of state or government of Mongolia?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the head of state or government of Mongolia?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan was a warrior and ruler who brought all the nomadic tribes of Mongolia under his rule.Open britannica.com (opens in a new tab)
The concept of the Mongolian state was founded by Genghis Khan (Chinggis Khaan) when he unified disparate nomadic tribes in 1206.Open investmongolia.gov.mn (opens in a new tab)
2 · Answer check returns Yes
Q24
1 · Guesser guesses
Punsalmaagiin Ochirbat
First president of Mongolia, serving from 1990 to 1997, who died in January 2025
Validator rationale The proposal identifies Punsalmaagiin Ochirbat, while the trusted subject is Genghis Khan.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"First president of Mongolia, serving from 1990 to 1997, who died in January 2025","name":"Punsalmaagiin Ochirbat","question":null}} 2 · Validator returns No
Q25
1 · Guesser asks
Did this person lead Mongolia before the democratic transition of 1990?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person lead Mongolia before the democratic transition of 1990?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
In 1203 AD, a single Mongolian state was formed based on nomadic tribal groupings under the leadership of Genghis Khan. 1990: First democratic elections held.Open 1997-2001.state.gov (opens in a new tab)
2 · Answer check returns Yes
Q26
1 · Guesser guesses
Jambyn Batmönkh
Mongolian communist leader who served as General Secretary of the MPRP and Chairman of the Presidium of the People's Great Khural of the Mongolian People's Republic in the late 1980s
Validator rationale Jambyn Batmönkh was a different Mongolian political leader from Genghis Khan.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Mongolian communist leader who served as General Secretary of the MPRP and Chairman of the Presidium of the People's Great Khural of the Mongolian People's Republic in the late 1980s","name":"Jambyn Batmönkh","question":null}} 2 · Validator returns No
Q27
1 · Guesser asks
Was this person the leader of Mongolia during World War II?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Was this person the leader of Mongolia during World War II?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan dies on August 18, 1227.Open history.com (opens in a new tab)
World War II began in 1939 and ended in 1945.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q28
1 · Guesser asks
Did this person lead Mongolia during the 1970s?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person lead Mongolia during the 1970s?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan was born in 1162 and died on August 18, 1227.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q29
1 · Guesser asks
Did this person lead Mongolia during the 1950s?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person lead Mongolia during the 1950s?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan, the founder of the Mongol Empire, died on August 18, 1227.Open ebsco.com (opens in a new tab)
2 · Answer check returns No
Q30
1 · Guesser asks
Did this person lead Mongolia during the 1930s?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person lead Mongolia during the 1930s?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan (born 1162—died August 18, 1227) was a Mongolian warrior-ruler.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q31
1 · Guesser reply rejectedTurn counted
Reply in the wrong format.
Invalid action · fixed format reminder sent
Why this reply was rejectedInvalid action · turn 31
The reply was JSON, but it matched neither the ASK nor the GUESS format.
- Recorded type
invalid_action- Turn
- 31
- Counted
- Yes · question 31
- Feedback
- FORMAT_ERROR
{"result":"ASK","description":null,"name":null,"question":"Did this person lead Mongolia during the 1920s?"}{"result":{"action":"ASK","description":null,"name":null,"question":"<non-empty yes-or-no property question>"}}{"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
Q32
1 · Guesser asks
Did this person lead Mongolia during the 1920s?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person lead Mongolia during the 1920s?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan died on August 18, 1227.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q33
1 · Guesser asks
Did this person lead Mongolia during the 1960s?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person lead Mongolia during the 1960s?"}}Oracle evidence2 model-reported sources
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan ... died August 18, 1227.Open britannica.com (opens in a new tab)
Genghis Khan ... dies in camp during a campaign against the Chinese kingdom of Xi Xia.Open history.com (opens in a new tab)
2 · Answer check returns No
Q34
1 · Guesser asks
Did this person lead Mongolia during the 1940s?
Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Did this person lead Mongolia during the 1940s?"}}Oracle evidence1 model-reported source
The Oracle reported these excerpts and URLs. They are not independently checked.
Genghis Khan died on August 18, 1227.Open britannica.com (opens in a new tab)
2 · Answer check returns No
Q35
1 · Guesser guesses
Dumaagiin Sodnom
Mongolian politician who served as Chairman of the Council of Ministers (Prime Minister) of the Mongolian People's Republic from 1984 to 1990
Validator rationale The proposal identifies Dumaagiin Sodnom, a Mongolian politician, while the trusted subject is Genghis Khan.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Mongolian politician who served as Chairman of the Council of Ministers (Prime Minister) of the Mongolian People's Republic from 1984 to 1990","name":"Dumaagiin Sodnom","question":null}} 2 · Validator returns No
G
1 · Guesser guessesNot counted
Genghis Khan
Founder of the Mongol Empire in the 13th century, its first Great Khan
Validator rationale The proposed identity exactly matches Genghis Khan, the founder and first khan of the Mongol Empire.
Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Founder of the Mongol Empire in the 13th century, its first Great Khan","name":"Genghis Khan","question":null}} 2 · Validator returns Yes