Research Goal
Design one difficult but fair browsing challenge.
Web research • AI evaluation • Benchmark design
A political-history question where the widely quoted date is not the answer.
Treaties have at least two dates — the day they are signed and the day they take effect — and popular accounts collapse them into one. This benchmark asks for the second, which is recorded in a formal depositary entry and can also be derived from a published interval.
Frontier AI browsing systems can answer many questions by locating obvious keywords or matching information from highly ranked webpages. This project explores how to construct a research question that cannot be solved through a single search. The answer must remain short, stable and objectively verifiable, while the clues require the researcher to connect different people, dates, places, organisations, publications, events, records and quantities.
Design one difficult but fair browsing challenge.
A short, stable and objectively verifiable fact.
Every clue must be independently supported by reliable evidence.
A question, answer, clue set, source trail, validation log and JSON record.
AIBRC-005
Portfolio integrity note: Every claim on this page was checked against the cited source before publication. No source, quotation, locator or search result is invented; where a detail could not be verified directly it is described rather than quoted.
Begin with a stable fact that can be confirmed through a reliable primary or authoritative source. Record the exact wording, document title, issuing organisation and publication date.
Develop clues involving different fact types, including dates, people, places, organisations, works, events, records and quantities. Each clue must be independently checkable.
Run obvious, broad and targeted search queries. Record the results to identify accidental shortcuts, direct answer leakage and misleading pages.
Explain how each source supports a specific clue and how the clues logically combine to identify one answer.
Recheck every source, confirm answer uniqueness, document limitations and export the completed benchmark record in a consistent JSON format.
Each clue constrains the answer from a different direction. No single row is sufficient on its own, and every row can be checked against a source another researcher can reach.
Statuses are editable so the matrix can be worked through row by row. Scroll sideways on small screens.
| Clue ID | Fact type | Clue statement | Constraint | Supporting source | Exact locator | Verification status |
|---|---|---|---|---|---|---|
| C01 | Event | The founding conference ran in a Californian city from 25 April to 26 June 1945. | Fixes the conference and the city (San Francisco) without naming the instrument. | United Nations — History of the UN | Paragraph on the San Francisco Conference | Verified |
| C02 | Date | The instrument was signed on 26 June 1945, the closing day of that conference. | Separates the signing date from the date being asked for. | United Nations — UN Charter | Opening description of the Charter | Verified |
| C03 | Organisation | The instrument only took effect once five named states plus a majority of other signatories had ratified it. | Points to the ratification condition rather than the signature. | United Nations — History of the UN | Paragraph naming China, France, the Soviet Union, the United Kingdom and the United States | Verified |
| C04 | Document clause | Entry into force is governed by a specific article of the instrument itself. | Article 110 — recorded in the depositary's treaty record. | United Nations Treaty Collection — Charter of the United Nations | Entry into force field | Verified |
| C05 | Quantity | The gap between the close of the conference and the effective date was four months. | Allows the answer to be derived arithmetically as a cross-check. | United Nations — History of the UN | “Four months after the San Francisco Conference ended…” | Verified |
Each card records a source that was opened and read before it was cited. Excerpts are quoted only where the wording was read directly; otherwise the record describes what the source shows.
A strong benchmark documents the searches a capable researcher or browsing agent would naturally attempt, including the ones that exposed the answer. Leakage is recorded rather than hidden, and the question is rewritten around it.
| Search number | Exact search query | Search engine or database | Date searched | Top relevant results | Answer revealed? | Problem discovered | Action taken |
|---|---|---|---|---|---|---|---|
| S01 | when was the UN Charter signed | 4 September 2026 | Returns 26 June 1945 immediately — the decoy date, not the answer. | No | Confirms that the obvious query resolves to the wrong date. | Kept; the question deliberately asks for the later date. | |
| S02 | UN Charter entry into force date | 4 September 2026 | Exposes 24 October 1945 directly in the top results. | Yes | A direct wording search answers the task in one step. | The question was rewritten to avoid the words 'charter', 'United Nations' and 'entry into force', describing the conference and the ratification condition instead. | |
| S03 | conference San Francisco April June 1945 instrument ratified five powers effective date | 4 September 2026 | Mixed conference histories; the effective date appears only after opening an organisational page. | No | None — this is the intended solving path. | Retained as the reference path. | |
| S04 | "24 October" 1945 article 110 ratification deposit | 4 September 2026 | Reaches the depositary record used as E03. | Yes | Only exposes the answer to a solver who already knows the article number. | Documented; the article number is withheld from the question. |
Every candidate source is scored from 1 to 5 against five criteria before it is allowed into the evidence chain.
Who created or issued the information?
Is the source directly connected to the event or record?
Does it support the precise claim being made?
Is the information unlikely to change?
Can another researcher locate the same evidence?
Export a report that maps every clue to the source it rests on, records the verification status and access date of each source, and lists the searches that exposed the answer.
Completion
14 of 15 checks confirmed
93%
The complete challenge is delivered as a single validated JSON document.
aibrc-005-benchmark-record.json
{
"challenge_id": "AIBRC-005",
"title": "International Politics Benchmark",
"project_type": "independent_demonstration",
"research_domain": "International Politics and Treaty Records",
"difficulty": "advanced",
"question": "A founding instrument agreed at a Californian conference that closed on 26 June 1945 only took effect once five named powers and a majority of the other signatories had ratified it. On what date did it enter into force?",
"accepted_answers": [
"24 October 1945"
],
"answer_type": "short_text",
"answer_normalisation": {
"case_sensitive": false,
"ignore_punctuation": true,
"accepted_variations": [
"24 October 1945",
"October 24, 1945",
"24/10/1945",
"1945-10-24"
]
},
"clues": [
{
"clue_id": "C01",
"fact_type": "event",
"statement": "The founding conference ran in a Californian city from 25 April to 26 June 1945.",
"constraint": "Fixes the conference and the city (San Francisco) without naming the instrument.",
"source": "United Nations — History of the UN",
"locator": "Paragraph on the San Francisco Conference",
"status": "verified"
},
{
"clue_id": "C02",
"fact_type": "date",
"statement": "The instrument was signed on 26 June 1945, the closing day of that conference.",
"constraint": "Separates the signing date from the date being asked for.",
"source": "United Nations — UN Charter",
"locator": "Opening description of the Charter",
"status": "verified"
},
{
"clue_id": "C03",
"fact_type": "organisation",
"statement": "The instrument only took effect once five named states plus a majority of other signatories had ratified it.",
"constraint": "Points to the ratification condition rather than the signature.",
"source": "United Nations — History of the UN",
"locator": "Paragraph naming China, France, the Soviet Union, the United Kingdom and the United States",
"status": "verified"
},
{
"clue_id": "C04",
"fact_type": "document clause",
"statement": "Entry into force is governed by a specific article of the instrument itself.",
"constraint": "Article 110 — recorded in the depositary's treaty record.",
"source": "United Nations Treaty Collection — Charter of the United Nations",
"locator": "Entry into force field",
"status": "verified"
},
{
"clue_id": "C05",
"fact_type": "quantity",
"statement": "The gap between the close of the conference and the effective date was four months.",
"constraint": "Allows the answer to be derived arithmetically as a cross-check.",
"source": "United Nations — History of the UN",
"locator": "“Four months after the San Francisco Conference ended…”",
"status": "verified"
}
],
"evidence": [
{
"evidence_id": "E01",
"claim_supported": "The answer, and clue C02.",
"source_title": "United Nations Charter",
"issuing_organisation": "United Nations",
"source_type": "Intergovernmental organisation",
"url": "https://www.un.org/en/about-us/un-charter",
"publication_date": "Continuously maintained page",
"page_number": "n/a (web page)",
"section": "Introductory paragraph",
"access_date": "4 September 2026",
"reliability": "High — the issuing organisation",
"verification_status": "verified"
},
{
"evidence_id": "E02",
"claim_supported": "Clues C01, C03 and C05.",
"source_title": "History of the United Nations",
"issuing_organisation": "United Nations",
"source_type": "Intergovernmental organisation",
"url": "https://www.un.org/en/about-us/history-of-the-un",
"publication_date": "Continuously maintained page",
"page_number": "n/a (web page)",
"section": "1945 and the San Francisco Conference",
"access_date": "4 September 2026",
"reliability": "High",
"verification_status": "verified"
},
{
"evidence_id": "E03",
"claim_supported": "Independent depositary confirmation of the answer and clue C04.",
"source_title": "Charter of the United Nations — treaty record",
"issuing_organisation": "United Nations Treaty Collection",
"source_type": "Treaty register",
"url": "https://treaties.un.org/pages/ViewDetails.aspx?src=TREATY&mtdsg_no=I-1&chapter=1",
"publication_date": "Depositary record, continuously maintained",
"page_number": "n/a (database record)",
"section": "Entry into force field",
"access_date": "4 September 2026",
"reliability": "High — official treaty depositary",
"verification_status": "verified"
}
],
"search_validation": [
{
"search_id": "S01",
"query": "when was the UN Charter signed",
"platform": "Google",
"search_date": "4 September 2026",
"relevant_results": "Returns 26 June 1945 immediately — the decoy date, not the answer.",
"answer_exposed": false,
"notes": "Confirms that the obvious query resolves to the wrong date. Kept; the question deliberately asks for the later date."
},
{
"search_id": "S02",
"query": "UN Charter entry into force date",
"platform": "Google",
"search_date": "4 September 2026",
"relevant_results": "Exposes 24 October 1945 directly in the top results.",
"answer_exposed": true,
"notes": "A direct wording search answers the task in one step. The question was rewritten to avoid the words 'charter', 'United Nations' and 'entry into force', describing the conference and the ratification condition instead."
},
{
"search_id": "S03",
"query": "conference San Francisco April June 1945 instrument ratified five powers effective date",
"platform": "Google",
"search_date": "4 September 2026",
"relevant_results": "Mixed conference histories; the effective date appears only after opening an organisational page.",
"answer_exposed": false,
"notes": "None — this is the intended solving path. Retained as the reference path."
},
{
"search_id": "S04",
"query": "\"24 October\" 1945 article 110 ratification deposit",
"platform": "Google",
"search_date": "4 September 2026",
"relevant_results": "Reaches the depositary record used as E03.",
"answer_exposed": true,
"notes": "Only exposes the answer to a solver who already knows the article number. Documented; the article number is withheld from the question."
}
],
"quality_checks": {
"The answer is short and objectively verifiable.": true,
"The answer is supported by an authoritative source.": true,
"The question has only one defensible answer.": true,
"No single clue directly exposes the answer.": true,
"Each clue is independently checkable.": true,
"The clue set spans multiple fact types.": true,
"The task requires multi-step reasoning.": true,
"Obvious searches have been documented.": true,
"Search-result snippets do not reveal the answer.": false,
"Sources are publicly accessible.": true,
"Exact pages, tables or sections are recorded.": true,
"The evidence chain can be reproduced.": true,
"The question avoids subjective interpretation.": true,
"The answer is stable over time.": true,
"No fabricated evidence is included.": true
},
"researcher": {
"name": "TMK Research Lab",
"portfolio": "https://theophilusmorkporkpor.lovable.app",
"email": "tkudjordjie@gmail.com"
}
}AI-generated statements are never treated as evidence. Every factual claim must be verified against an accessible external source.
This benchmark is complete: the answer is fixed, 3 evidence records are attached to specific clues, and 4 validation searches are documented, including those that exposed the answer. It demonstrates the ability to approach an unfamiliar subject systematically, separate evidence from assumption and document research so that another person can audit it.
Two dates compete and the more famous one — 26 June 1945 — is given in the question itself as a clue, so a careless solver simply repeats it.
Queries phrased around the signing returned the decoy date only. The effective date surfaces reliably only when ratification is named.
The depositary treaty record, because it states the effective date as a formal field tied to a specific article rather than as narrative text.
Naming the ratification condition rules out every other 1945 milestone, including the opening of the first General Assembly in 1946.
Answering 26 June 1945, or giving 10 January 1946 by confusing entry into force with the first session.
The effective date is well indexed, so a direct query still resolves it; the difficulty comes from the wording of the question rather than from search depth.
Require the number of ratifications deposited by that date, which is only reachable from the depositary tables.
I am available for web research, fact-checking, AI evaluation, benchmark construction, source verification and structured research documentation.
TMK Research Labtkudjordjie@gmail.comhttps://theophilusmorkporkpor.lovable.apphttps://www.linkedin.com/in/theophilus-kudzordzi