{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.pawn","code":"thing-q135","url":"https://ver.cy/models/thing/q135/","name":"pawn","alternateNames":["rook pawn","passed pawn","backward pawn","isolated pawn","hanging pawn","white pawn","black pawn","king pawn","queen pawn","connected pawns"],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.OBJ"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A pawn is the shortest and most numerous chessman in a standard set: eight matching pieces per colour that start on the second rank (White) or seventh rank (Black) and that, uniquely, move one square forward, capture one square diagonally, may step two squares from the starting rank, may capture en passant, and promote on the last rank, as defined in the FIDE Laws of Chess.","purpose":"Enable an AI agent to recognise a physical chess pawn, assess its usability and game status, and determine which handling or play actions are permitted.","scope":{"in":["Identification as a pawn within a particular chess set","Physical features that affect recognition, stability and handling","Assignment to a side and orientation relative to its direction of advance","Position and pawn-specific eligibility within a referenced game","Capture, removal and promotion transitions affecting this piece"],"out":["The chessboard's construction and complete square topology","The full game position, turn sequence and adjudication","Rules governing other chess piece types","Player identity, ownership and tournament administration","Pawnshop collateral and metaphorical uses of the word pawn"],"boundaries":[]},"distinguishingFeatures":["The set's convention or an explicit designation identifies the piece as a pawn; a small size or rounded head alone is insufficient.","Within an assigned game, the piece has a pawn role under the selected ruleset rather than the role of another similarly shaped piece.","A generic counter used as a substitute qualifies only when its pawn designation and allegiance are established.","A pawn-shaped piece representing a promoted piece must be distinguished from a piece whose current game role remains pawn."],"structure":{"bundles":[{"id":"pawn-recognition","name":"Pawn recognition","description":"Establishes why this physical piece is understood to be a pawn.","layers":[{"id":"set-relative-identity","name":"Set-relative identity","description":"Interprets shape and markings using the piece's set conventions.","findings":[{"id":"pawn-identification-evidence","name":"Pawn identification evidence","description":"Record the evidence supporting pawn identification and any competing interpretation.","questions":[{"text":"Which shape, marking or set convention identifies this piece as a pawn?","id":"pawn-identification-evidence-q01","kind":"definition"},{"text":"Could it be confused with another piece in this set, and what observation resolves that ambiguity?","id":"pawn-identification-evidence-q02","kind":"boundary"}]}]},{"id":"designation-and-substitution","name":"Designation and substitution","description":"Distinguishes manufactured appearance from an assigned game role.","findings":[{"id":"declared-pawn-role","name":"Declared pawn role","description":"Record whether the piece is a conventional pawn, a substitute pawn or a pawn-shaped representative of another role.","questions":[{"text":"What declaration or game record establishes the role this physical piece currently represents?","id":"declared-pawn-role-q01","kind":"provenance"},{"text":"Does its current role agree with its appearance, or must an agent preserve an explicit exception?","id":"declared-pawn-role-q02","kind":"boundary"}]}]}]},{"id":"physical-play-fitness","name":"Physical play fitness","description":"Assesses whether the pawn can be recognised, placed and moved reliably on the intended board.","layers":[{"id":"square-fit-and-stability","name":"Square fit and stability","description":"Relates the pawn's footprint and standing behaviour to the board in use.","findings":[{"id":"unambiguous-square-occupancy","name":"Unambiguous square occupancy","description":"Record whether the pawn stands securely with a clear square assignment beside neighbouring pieces.","questions":[{"text":"What is the pawn's base width relative to the usable width of a board square?","id":"unambiguous-square-occupancy-q01","kind":"measurement"},{"text":"Can it stand on its intended square without leaning, overlapping adjacent pieces or obscuring its placement?","id":"unambiguous-square-occupancy-q02","kind":"boundary"}]}]},{"id":"recognition-and-grasp-condition","name":"Recognition and grasp condition","description":"Examines damage or wear that affects pawn identification and manipulation.","findings":[{"id":"pawn-specific-usability-defects","name":"Pawn usability defects","description":"Record defects that obscure pawn or side identity, or prevent reliable movement among nearby pieces.","questions":[{"text":"Which worn, missing or altered features make its pawn identity or side assignment uncertain?","id":"pawn-specific-usability-defects-q01","kind":"boundary"},{"text":"Can the intended human or robotic handler lift and replace it without disturbing neighbouring pieces?","id":"pawn-specific-usability-defects-q02","kind":"action"}]}]}]},{"id":"pawn-play-context","name":"Pawn play context","description":"Connects the pawn to the game evidence needed to evaluate its actions.","layers":[{"id":"side-square-and-direction","name":"Side, square and direction","description":"Establishes the pawn's location and orientation within a referenced position.","findings":[{"id":"position-grounding","name":"Position grounding","description":"Record the assigned side, observed square and applicable direction of advance without reconstructing the entire game here.","questions":[{"text":"Which side and board square are assigned to this pawn in the referenced position?","id":"position-grounding-q01","kind":"provenance"},{"text":"How does the selected ruleset and board orientation establish this pawn's forward direction and promotion boundary?","id":"position-grounding-q02","kind":"definition"}]}]},{"id":"move-eligibility-evidence","name":"Move eligibility evidence","description":"Identifies the position and history evidence required for pawn-specific actions.","findings":[{"id":"candidate-action-validation","name":"Candidate action validation","description":"Record supported candidate actions and unresolved dependencies, referring final legality to the game model.","questions":[{"text":"Which advances and captures are supported by the current occupancy, turn and king-safety constraints?","id":"candidate-action-validation-q01","kind":"action"},{"text":"What position or history evidence establishes eligibility for an initial extended advance or en passant under the selected ruleset?","id":"candidate-action-validation-q02","kind":"provenance"},{"text":"Which candidate actions must remain undecided because the relevant game evidence is missing?","id":"candidate-action-validation-q03","kind":"boundary"}]}]}]},{"id":"capture-and-promotion-transitions","name":"Capture and promotion transitions","description":"Tracks changes that separate a physical pawn's continued existence from its participation as a pawn in a game.","layers":[{"id":"capture-and-removal","name":"Capture and removal","description":"Connects confirmed capture events to removal of the correct physical piece.","findings":[{"id":"captured-pawn-disposition","name":"Captured pawn disposition","description":"Record the evidence for capture and the pawn's resulting physical location.","questions":[{"text":"Which confirmed game event establishes that this pawn has been captured?","id":"captured-pawn-disposition-q01","kind":"provenance"},{"text":"Which physical pawn must be removed, including when the capture destination differs from the captured pawn's square?","id":"captured-pawn-disposition-q02","kind":"action"}]}]},{"id":"promotion-and-representation","name":"Promotion and representation","description":"Separates the promotion decision from the physical means of representing the resulting role.","findings":[{"id":"promotion-role-handoff","name":"Promotion role handoff","description":"Record promotion eligibility, the selected resulting role and how that role is represented physically.","questions":[{"text":"Has the pawn met the selected ruleset's promotion conditions, and which resulting roles are permitted?","id":"promotion-role-handoff-q01","kind":"action"},{"text":"Will the pawn be replaced or explicitly redesignated, and how will the resulting role remain unambiguous?","id":"promotion-role-handoff-q02","kind":"action"},{"text":"After promotion, which record follows the physical pawn and which follows the piece participating in the game?","id":"promotion-role-handoff-q03","kind":"boundary"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-kinds","name":"Kinds and varieties","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these kinds and varieties hold for the sense of pawn this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of pawn this model covers, and on what evidence?","id":"evidence-identifiers-q01","kind":"provenance"}]},{"id":"evidence-standards-and-regulation","name":"Standards and regulation","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these standards and regulation hold for the sense of pawn this model covers, and on what evidence?","id":"evidence-standards-and-regulation-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these real-world use hold for the sense of pawn this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these typical measurements hold for the sense of pawn this model covers, and on what evidence?","id":"evidence-measurements-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of pawn this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-regional-variation","name":"Regional variation","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these regional variation hold for the sense of pawn this model covers, and on what evidence?","id":"evidence-regional-variation-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Reported by the breadth pass; each item needs checking against its source before it becomes normative.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of pawn this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Explain the pawn's moves, captures, promotion and en passant rules.","Analyse pawn structure in a game when asked.","Record pawn moves in standard notation."],"mustNot":["Help a player cheat in a rated or tournament game by suggesting moves.","Misstate the rules of pawn promotion or en passant.","Give small pawns to young children without warning about choking."],"requiresHuman":["Ruling on a disputed pawn move in an official game."]},"ethics":{"considerations":["Fair play in competitive chess depends on players not receiving outside help.","Chess sets are often used by children, and small pieces are a choking risk."],"affectedParties":["Chess players","Tournament arbiters","Small children"]},"owners":{"steward":"The person who owns the set; chess federations govern the rules.","roles":[],"masterSystems":[]},"relations":[{"target":"Q208440","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.pawn","Wikidata: Q135 (https://www.wikidata.org/wiki/Q135)"]},"properties":{"applicability":"required","items":["Pawn identification basis: set convention | marking | explicit substitute designation | uncertain","Assigned side: Reference to a game side, unassigned or unknown","Current represented role: pawn | other declared piece role | unassigned | unknown","Set membership: Reference to a chess set, unmatched or unknown","Base width: mm, using diameter for a circular base or maximum width otherwise","Handling and recognition condition: Observed stability, grip defects and damage to identifying features","Placement: Referenced board square | captured-piece area | storage location | ambiguous placement","Pawn action eligibility: Context-supported eligibility for advance, capture, initial advance, en passant and promotion; unknown where evidence is missing"]},"recognition":{"applicability":"required","items":["The smallest piece in a chess set, with a rounded head on a short body.","Eight per side lined up on the second or seventh rank at the start."]},"capabilities":{"applicability":"required","items":["Identify or explicitly designate the piece as a pawn for a particular set and side.","Place, grasp and relocate it while maintaining a clear square assignment.","Evaluate candidate pawn moves against the referenced ruleset, position and relevant history.","Remove it from active play when a capture is established.","Replace or redesignate its representation when promotion is established.","Flag and substitute a damaged or ambiguous pawn under the applicable play conventions."]},"hazards":{"applicability":"required","items":["Choking hazard for small children.","Disputes from illegal pawn moves in competition."]},"interfaces":{"applicability":"required","items":["FIDE Laws of Chess, International Chess Federation."]},"context":{"applicability":"required","items":["A pawn is used on a chessboard during games, lessons, puzzles and position analysis.","Its position helps determine available moves, defensive structures and opportunities for promotion."]}},"sources":[{"title":"FIDE Laws of Chess","url":"https://handbook.fide.com/","note":"Official identity of the pawn as a chessman, starting placement, move, capture, en passant, and promotion."},{"title":"FIDE Handbook C.02, Standards of Chess Equipment, tournament venue facilities and logo","url":"","note":"Tournament equipment proportions (king height as the reference, other pieces including the pawn kept in proportion) and what counts as acceptable over-the-board material."},{"title":"Pawn (chess)","url":"https://en.wikipedia.org/wiki/Pawn_(chess)","note":"Common-language naming, movement summary, historical origin as a foot soldier, and distinction from analogous pieces in other chess families."},{"title":"The Unicode Standard: Miscellaneous Symbols (chess pieces U+2654-U+265F)","url":"https://www.unicode.org/charts/PDF/U2600.pdf","note":"Encoded identifiers for the white and black pawn as distinct graphic characters."},{"title":"Wikidata item Q135: pawn","url":"https://www.wikidata.org/wiki/Q135","note":"identity and sense of the item"},{"title":"Wikipedia: Pawn (chess)","url":"https://en.wikipedia.org/wiki/Pawn_%28chess%29","note":"general description of the item"}],"openQuestions":["Does vr.tr.pawn specifically mean a physical chess pawn, or does the registry intend a broader or different sense?","Does an existing Vercy world model already own this concept or the pawn role, requiring a link rather than a separate publication?","Which chess rulesets and variants must be supported, especially for initial advances, en passant, promotion and re-entry into play?","What conventions govern substitute pawns and physical representations of promoted pieces in the intended use contexts?","What evidence and confidence thresholds are required for automated recognition, square assignment and robotic handling?"],"resources":{"spec":"/models/things/publications/thing-q135/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q135/spec.json"],"providers":["Codex","Grok"],"researchStatus":"unreviewed","generatedAt":"2026-09-07T14:08:35Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:26+00:00: completeness 1.00; sense: Wikidata description; 5 live sources; review by codex: pass"},"score":1.0}}