{ "model": { "rank": 5958, "code": "thing-q20819848", "model_id": "vr.tr.checkmate", "name": "checkmate", "purpose": "Let an agent explain checkmate and its rules, describe named mating patterns and traps, support learning to deliver and avoid checkmate, and describe checkmate in problems and other games.", "family": "Thing Registry", "category": "Cross-cutting context", "status": "research-draft", "kind": "thing", "plane": "XCT", "domain": "XCT.STA", "industry": "", "version": "", "url": "/models/thing/q20819848/", "tier": 2, "score": 63, "payload": { "layer": "wikidata", "aliases": [ "scholar's mate", "fool's mate", "helpmate", "Arabian mate", "hook mate", "Légal Trap", "epaulette mate", "king and pawn versus king endgame", "pure mate", "selfmate", "bishop and knight checkmate", "Drop Pawn Mate", "king and two bishops versus king", "Anastasia's mate", "king and rook versus king", "king and queen versus king", "economical mate", "mate with two rooks", "mirror mate", "two knights endgame", "smothered mate", "back-rank checkmate", "two knights versus a pawn", "two knights versus king" ], "aliasCount": 24, "merged": 24, "knownIn": 63, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": "vr.tr.checkmate", "source": { "dataset": "wikidata", "item": "Q20819848", "url": "https://www.wikidata.org/wiki/Q20819848", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T02:02:13Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 2, "engine": "claude" }, "metaModel": { "id": "THING-Q20819848", "registryId": "vr.tr.checkmate", "name": "checkmate", "version": "0.2.0-wave.2", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.STA" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q20819848/", "model": { "registry_id": "vr.tr.checkmate", "name": "checkmate", "purpose": "Let an agent explain checkmate and its rules, describe named mating patterns and traps, support learning to deliver and avoid checkmate, and describe checkmate in problems and other games.", "definition": "In chess, the position in which a player king is under attack and no legal move can remove the threat, ending the game with a win for the attacking side, with named patterns such as the scholar mate, fool mate, Arabian mate and hook mate, traps such as the Legal trap, and the helpmate genre of composed problems; checkmate is the objective of chess and related games, is studied through mating patterns and endgame theory, and is used figuratively for decisive defeat.", "what_it_is_for": "The decisive ending of a chess game.", "affordances": [ "explain rules", "describe patterns and traps", "support learning", "describe problems and variants" ], "distinguishing_features": [ "Game-ending", "Named patterns", "Endgame technique", "Figurative use" ], "appearance": "Not physical; a board position.", "visual_identification": [ "King attacked with no legal escape", "Ends the game", "Check is a threat that can be met; stalemate is no legal move without check" ], "physical_properties": [], "families_and_kinds": [ "basic checkmates such as king and queen", "named mating patterns such as Arabian and hook mate", "opening traps such as scholar mate and the Legal trap", "helpmates and composed problems", "checkmate in chess variants" ], "related_models": [ { "relation": "is a kind of", "target": "chess condition", "why": "category" }, { "relation": "is a kind of", "target": "victory", "why": "category" }, { "relation": "is a kind of", "target": "defeat", "why": "category" }, { "relation": "is related to", "target": "round-robin tournament", "why": "chess tournament formats" } ], "identifiers": [], "standards_and_regulation": [ "FIDE laws of chess", "Chess problem composition conventions", "No regulation beyond game rules" ], "failure_modes_and_hazards": [ "Confusing checkmate with stalemate", "Illegal moves in claimed mates", "Overreliance on traps" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "What checkmate is.", "rationale": "Rules.", "layers": [ { "id": "rules", "name": "Rules", "description": "Rules and definition.", "findings": [ { "id": "rules-finding", "name": "Rules", "description": "Rules.", "questions": [ { "text": "What is checkmate under the laws of chess, and how does it differ from check and stalemate?", "kind": "definition" }, { "text": "Is chess checkmate or the figurative sense meant?", "kind": "boundary" } ] } ] }, { "id": "patterns", "name": "Patterns", "description": "Mating patterns.", "findings": [ { "id": "patterns-finding", "name": "Patterns", "description": "Patterns.", "questions": [ { "text": "What are named patterns such as the Arabian mate, hook mate and back-rank mate, and how are they recognised?", "kind": "definition" }, { "text": "Which entry fits a specific pattern?", "kind": "action" } ] } ] } ] }, { "id": "play", "name": "Play", "description": "Delivering and avoiding checkmate.", "rationale": "Practice.", "layers": [ { "id": "technique", "name": "Technique", "description": "Basic checkmates.", "findings": [ { "id": "technique-finding", "name": "Technique", "description": "Technique.", "questions": [ { "text": "How are basic checkmates with queen, rook and minor pieces delivered against a lone king?", "kind": "action" }, { "text": "Which entry fits endgame theory?", "kind": "action" } ] } ] }, { "id": "traps", "name": "Traps", "description": "Traps and defence.", "findings": [ { "id": "traps-finding", "name": "Traps", "description": "Traps.", "questions": [ { "text": "What are the scholar mate, fool mate and Legal trap, and how are such traps avoided?", "kind": "definition" }, { "text": "Which entry fits chess openings?", "kind": "action" } ] } ] } ] }, { "id": "problems", "name": "Problems", "description": "Problems and variants.", "rationale": "Context.", "layers": [ { "id": "composition", "name": "Composition", "description": "Helpmates and problems.", "findings": [ { "id": "composition-finding", "name": "Composition", "description": "Problems.", "questions": [ { "text": "What are helpmates and other composed checkmate problems, and how are they solved?", "kind": "provenance" }, { "text": "Which entry fits chess problems?", "kind": "action" } ] } ] }, { "id": "variants", "name": "Variants", "description": "Checkmate in other games.", "findings": [ { "id": "variants-finding", "name": "Variants", "description": "Variants.", "questions": [ { "text": "How does checkmate work in shogi, xiangqi and chess variants?", "kind": "provenance" }, { "text": "Which entry fits a specific variant?", "kind": "action" } ] } ] } ] }, { "id": "learn", "name": "Learn", "description": "History and teaching.", "rationale": "Education.", "layers": [ { "id": "history", "name": "History", "description": "History.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How did the rules of checkmate develop from early chess to the modern game, and where does the word come from?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "teach", "name": "Teach", "description": "Teaching.", "findings": [ { "id": "teach-finding", "name": "Teach", "description": "Teaching.", "questions": [ { "text": "How can checkmate patterns be taught to beginners?", "kind": "action" }, { "text": "Which misconceptions arise?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Should each mating pattern be a separate entry?", "How should chess resources be linked?", "How should problem databases be linked?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "abstract concept", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a checkmate, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain checkmate and its rules, describe named mating patterns and traps, support learning to deliver and avoid checkmate, and describe checkmate in problems and other games.", "characteristics": { "substance": "abstract", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: scholar's mate, fool's mate, helpmate, Arabian mate, hook mate, Légal Trap, epaulette mate, king and pawn versus king endgame, pure mate, selfmate, bishop and knight checkmate, Drop Pawn Mate.", "24 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 63 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a checkmate, and on what evidence are they told apart?" ], "whatItIsMadeOf": "an abstraction with no physical instance", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state" ], "howItIsRecognised": [ "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "scholar's mate", "fool's mate", "helpmate", "Arabian mate", "hook mate", "Légal Trap", "epaulette mate", "king and pawn versus king endgame", "pure mate", "selfmate", "bishop and knight checkmate", "Drop Pawn Mate" ] } ], "standing": "Described in 63 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 24 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one checkmate from another, and a checkmate from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a checkmate, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a checkmate, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a checkmate is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a checkmate, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a checkmate, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a checkmate is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a checkmate sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a checkmate, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a checkmate, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a checkmate is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a checkmate from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a checkmate, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a checkmate, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a checkmate is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a checkmate passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a checkmate between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a checkmate, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a checkmate, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a checkmate is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a checkmate, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a checkmate is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a checkmate, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a checkmate, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a checkmate is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "definitions-in-contest", "name": "Definitions and who holds them", "description": "What checkmate is taken to mean, and by whom.", "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.", "layers": [ { "id": "competing-definitions", "name": "Competing definitions", "description": "The main readings and the traditions behind them.", "findings": [ { "id": "definition-map", "name": "Definitions and their holders", "description": "Each definition with the school or body that holds it.", "questions": [ { "id": "definition-map-q01", "text": "Which definitions of checkmate are in use, and which tradition or body holds each?", "kind": "definition" }, { "id": "definition-map-q02", "text": "What turns on the difference between them in practice?", "kind": "boundary" } ] } ] }, { "id": "operationalisation", "name": "Operationalisation", "description": "How it is measured or applied when it has to be.", "findings": [ { "id": "operational-record", "name": "Measures and proxies", "description": "Instruments and indicators used to stand in for it.", "questions": [ { "id": "operational-record-q01", "text": "How is checkmate operationalised or measured in practice, and by what instrument?", "kind": "measurement" }, { "id": "operational-record-q02", "text": "What does that operationalisation leave out, and when does that matter?", "kind": "boundary" } ] } ] } ] }, { "id": "instances-and-use", "name": "Instances, use and consequence", "description": "What counts as an instance of checkmate and what follows from calling something that.", "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.", "layers": [ { "id": "instances", "name": "What counts as an instance", "description": "Clear cases, borderline cases and non-cases.", "findings": [ { "id": "instance-tests", "name": "Tests for an instance", "description": "What would settle whether something falls under it.", "questions": [ { "id": "instance-tests-q01", "text": "What would settle whether something is an instance of checkmate?", "kind": "boundary" }, { "id": "instance-tests-q02", "text": "Which borderline cases are argued about, and on what grounds?", "kind": "definition" } ] } ] }, { "id": "consequence", "name": "Consequence of application", "description": "Rights, duties or decisions that follow from the label.", "findings": [ { "id": "consequence-record", "name": "What the label licenses", "description": "What an agent may do once something is classified this way.", "questions": [ { "id": "consequence-record-q01", "text": "What follows practically once something is treated as checkmate?", "kind": "action" }, { "id": "consequence-record-q02", "text": "What must an agent not infer from the label alone?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a checkmate came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a checkmate and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a checkmate, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a checkmate, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a checkmate is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a checkmate is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a checkmate, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a checkmate, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a checkmate is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 5, "layers": 10, "findings": 12, "questions": 32 } } } }