Deep20Bench
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Round

Round 3

Round 3

Identified Moon in 21 counted questions.

Back to all Moon rounds
Questions
21
Outcome
Solved
Format errors
No errors
Duration
2m 38s
Round cost
$0.0530 All 22 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.

System message
You are the Guesser in a Twenty Questions benchmark. Identify the hidden subject using as few
counted turns as possible. BEGIN provides only its broad category. The variation_token has no
clues; do not interpret, mention, or repeat it.

The category in BEGIN has a broad meaning:
- person: a real human, living or historical.
- fictional_character: an invented character from a story, book, comic, film, television,
  game, or another fictional work.
- mythological_figure: a figure from mythology or traditional legend.
- video_game_character: a character known from video games.
- thing: a broad category covering natural and human-made entities, living or nonliving,
  whole entities or parts of them. Possibilities include everyday objects, tools, machines,
  materials, food, animals, plants, body parts, natural structures, geographical features,
  celestial bodies, natural phenomena, and concepts. These possibilities are not exhaustive.
  The target may be a general kind or one particular instance.

Use questions to narrow the supplied category. These definitions are not a list of targets.

Use ASK for a factual question that distinguishes candidates. Never use ASK to confirm a
specific identity. Use GUESS with a name and short identifying description to name a candidate.

ASK has five possible replies:
- YES or NO: the evidence establishes that answer to the exact question.
- RATHER_YES or RATHER_NO: evidence leans that way, but is not strong enough for a firm answer.
  Treat this as a clue; keep candidates fitting the opposite answer possible.
- UNKNOWN: no reliable direction. It supports neither answer.

Ask clear questions about verifiable properties. "Can", "sometimes", "usually", "always", and
"mainly" ask different things. Do not assume that one property proves another or rules out alternatives.
Qualified replies express uncertainty about your question, not how often a property applies.
Before narrowing heavily, check your key assumption with a different property. After rejected
guesses, reconsider earlier assumptions as well as candidates. Answers can be mistaken; check
another property when stuck. Do not ignore an answer merely because it conflicts with a
preferred candidate.

Each ASK, rejected GUESS, or format error before the limit costs one turn. A correct GUESS costs
none. After 40 counted turns, make one final GUESS; ASK is then forbidden. Identity
validation uses only YES, NO, or UNKNOWN. UNKNOWN on GUESS ends the game without success.

FORMAT_ERROR means your output broke the contract, was not checked for correctness, and cost
one turn. Retry using its displayed formats if a turn remains. Return only the required JSON
object with exactly one result action. No explanations, reasoning, or extra fields.
BEGIN event
{"category":"thing","event":"BEGIN","variation_token":"AMZAISLM"}

Valid replies are shown in the required format. Rejected replies are shown separately, without provider or call IDs.

8 of 21 answers in this round reuse an earlier, fully checked answer with its original evidence. No new search or check ran for those turns.

Q1
1 · Guesser asks

Is it a natural object (found in nature, not made by humans)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a natural object (found in nature, not made by humans)?"}}
Oracle evidence3 model-reported sources

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

2 · Answer check returns Yes
Q2
1 · Guesser asks

Is it a living organism (e.g., animal, plant, fungus)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a living organism (e.g., animal, plant, fungus)?"}}
Oracle evidence3 model-reported sources

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

Source 01
The many missions that have explored the Moon have found no evidence to suggest it has its own living things. ... The Moon was likely formed after a Mars-sized body collided with Earth several billion years ago.
Open solarsystem.nasa.gov
Source 03

Source summary (model-reported)

Our moon is the fifth largest of the 190+ moons orbiting planets in our solar system. Earth's only natural satellite is simply called "the Moon" ... The Moon was likely formed after a Mars-sized body collided with Earth.

Open arcnav.psi.edu
2 · Answer check returns No
Q3
1 · Guesser asks

Is it a geological feature or landform (like a mountain, valley, canyon, or cave)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a geological feature or landform (like a mountain, valley, canyon, or cave)?"}}
Oracle evidence3 model-reported sources

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

Source 02
The most numerous and significant landforms belong to a size-morphology series of simple craters, complex craters, and ringed basins that were formed by impacts.
Open usgs.gov
Source 03

Source summary (model-reported)

Signs of past volcanic activity, like caves, plains, and domes made of cooled lava, are widespread. Mare Crisium is a large, dark, basaltic plain on the Moon.

Open science.nasa.gov
2 · Answer check returns No
Q4
1 · Guesser asks

Is it a celestial body or astronomical object (like a star, planet, moon, or asteroid)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a celestial body or astronomical object (like a star, planet, moon, or asteroid)?"}}
Oracle evidence3 model-reported sources

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

Source 02
A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body. Natural satellites are colloquially referred to as moons.
Open en.wikipedia.org
2 · Answer check returns Yes
Q5
1 · Guesser asks

Is it larger than Earth?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it larger than Earth?"}}
Oracle evidence3 model-reported sources

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

Source 01

Source summary (model-reported)

The Moon is about one-quarter the size of Earth in diameter... Moon has 3474 km in diameter, while the Earth is 12 756 km.

Open esa.int
Source 03

Source summary (model-reported)

The Earth is approximately 7,900 miles (12,800 kilometers) in diameter, or about four times the diameter of the Moon, 2,100 miles (3,500 kilometers).

Open science.nasa.gov
2 · Answer check returns No
Q6
1 · Guesser asks

Is it larger than Earth's moon?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it larger than Earth's moon?"}}
Oracle evidence1 model-reported source

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

2 · Answer check returns No
Q7
1 · Guesser asks

Is it a dwarf planet?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a dwarf planet?"}}
Oracle evidence2 model-reported sources

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

Source 01
A "dwarf planet" is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, (c) has not cleared the neighbourhood around its orbit, and (d) is not a satellite.
Open iau.org
2 · Answer check returns No
Q8
1 · Guesser asks

Is it a planet in our solar system?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a planet in our solar system?"}}
Oracle evidence3 model-reported sources

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

Source 03

Source summary (model-reported)

Our moon is the fifth largest of the 190+ moons orbiting planets in our solar system. Earth's only natural satellite is simply called "the Moon".

Open arcnav.psi.edu
2 · Answer check returns No
Q9
1 · Guesser asks

Is it larger than Pluto?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it larger than Pluto?"}}
Oracle evidence1 model-reported source

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

Source 01
With a diameter of 3,475 kilometers the Moon is about 1/4 the size of Earth though, and that does make it the largest moon when compared to the size of its parent Solar System planet. ... It's also larger than dwarf planets Pluto and Eris.
Open apod.nasa.gov
2 · Answer check returns Yes
Q10
1 · Guesser asks

Is it larger than Pluto but not a planet or dwarf planet? This might be a large asteroid or trans-Neptunian object (TNO).

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it larger than Pluto but not a planet or dwarf planet? This might be a large asteroid or trans-Neptunian object (TNO)."}}
Oracle evidence3 model-reported sources

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

Source 01

Source summary (model-reported)

The measured diameter of Pluto was approximately 2200 km, and the source states that Pluto is smaller than the Earth's Moon.

Open eso.org
Source 02

Source summary (model-reported)

The Moon is Earth's natural satellite. The source distinguishes a moon from a planet by explaining that a planet orbits a star, whereas a moon orbits a planet or another celestial body that is not a star.

Open asc-csa.gc.ca
2 · Answer check returns Yes
Q11
1 · Guesser asks

Is it located in the Kuiper Belt or beyond Neptune?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it located in the Kuiper Belt or beyond Neptune?"}}
Oracle evidence3 model-reported sources

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

Source 02

Source summary (model-reported)

NASA describes the Kuiper Belt as a disc-shaped region beyond Neptune extending from about 30 to 55 astronomical units, compared with Earth at one astronomical unit from the Sun.

Open science.nasa.gov
Source 03

Source summary (model-reported)

NASA states that the Kuiper Belt's inner edge begins at Neptune's orbit, about 30 AU from the Sun, and that the belt is located beyond Neptune's orbit.

Open science.nasa.gov
2 · Answer check returns No
Q12
1 · Guesser asks

Is it an asteroid?

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

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

Source 02

Source summary (model-reported)

A small population of near-Earth objects may also come from the Moon’s surface after being ejected into space by an impact. The article distinguishes those separate asteroid objects from the Moon and describes 2024 PT5 as a likely chunk of Moon rock.

Open jpl.nasa.gov
2 · Answer check returns No
Q13
1 · Guesser asks

Is it a comet?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a comet?"}}
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 it a natural satellite (moon) of a planet?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it a natural satellite (moon) of a planet?"}}
Oracle evidence3 model-reported sources

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

2 · Answer check returns Yes
Q15
1 · Guesser asks

Does it orbit a planet in our solar system?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it orbit a planet in our solar system?"}}
Oracle evidence3 model-reported sources

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

2 · Answer check returns Yes
Q16
1 · Guesser asks

Is it larger than Titan?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it larger than Titan?"}}
Oracle evidence2 model-reported sources

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

Source 01
Titan is bigger than Earth's moon... Titan has a radius of about 1,600 miles (2,575 kilometers), and is nearly 50 percent wider than Earth’s moon... Diameter 3,200 miles (5,149.4 kilometers).
Open solarsystem.nasa.gov
2 · Answer check returns No
Q17
1 · Guesser asks

Is it one of the larger moons in our solar system, like Ganymede, Callisto, Io, Europa, or similar?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Is it one of the larger moons in our solar system, like Ganymede, Callisto, Io, Europa, or similar?"}}
Oracle evidence1 model-reported source

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

Source 01

Source summary (model-reported)

ESA's size comparison lists Earth's Moon at 3,475 km in diameter, Io at 3,643 km, Europa at 3,122 km, Ganymede at 5,262 km, and Callisto at 4,821 km. It states that Io and Europa are relatively similar in size to the Moon, while Ganymede is quite a lot bigger.

Open esa.int
2 · Answer check returns Yes
Q18
1 · Guesser asks

Does it orbit a gas giant planet (Jupiter, Saturn, Uranus, or Neptune)?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it orbit a gas giant planet (Jupiter, Saturn, Uranus, or Neptune)?"}}
Oracle evidence2 model-reported sources

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

Source 01

Source summary (model-reported)

Earth’s Moon is unusually large compared with the planet. ... Earth has one [moon] ... The Moon formed from the cloud of debris that was left in orbit around the Earth.

Open esa.int
Source 02
The four planets closest to the Sun — Mercury, Venus, Earth, and Mars — are called the terrestrial planets because they have solid, rocky surfaces. Two of the outer planets ... Jupiter and Saturn — are known as gas giants; the more distant Uranus and Neptune are called ice giants.
Open nasa.gov
2 · Answer check returns No
Q19
1 · Guesser asks

Does it orbit a terrestrial (rocky) planet like Mars or Earth?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it orbit a terrestrial (rocky) planet like Mars or Earth?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns Yes
Q20
1 · Guesser asks

Does it orbit Mars?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it orbit Mars?"}}
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

Does it orbit Earth?

Recorded Guesser outputRequired JSON format
{"result":{"action":"ASK","description":null,"name":null,"question":"Does it orbit Earth?"}}
Oracle evidence2 model-reported sources

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

2 · Answer check returns Yes
G
1 · Guesser guessesNot counted

the Moon

Earth's only natural satellite, the largest moon relative to its parent planet size, though smaller than Titan and Pluto.

Validator rationale The proposal identifies the specific Moon, Earth's natural satellite, matching the target entity. The additional comparative wording does not change that identity.

Recorded Guesser outputRequired JSON format
{"result":{"action":"GUESS","description":"Earth's only natural satellite, the largest moon relative to its parent planet size, though smaller than Titan and Pluto.","name":"the Moon","question":null}}
2 · Validator returns Yes