rook
Enable an AI agent to recognise a physical chess rook, assess its condition and game role, and determine permitted handling or moves within an identified ruleset.
Bundle → Layer → Finding → Questions Filled
5 bundles · 9 layers · 9 findings · 19 questions
Rook identification Establish whether the observed object is a chess rook and how that identification is supported.
Referent resolution
Resolve the intended meaning of rook before applying chess-specific reasoning.
Chess referent evidence
Record evidence supporting the provisional chess-piece interpretation and retain unresolved alternatives.
- What registry context or associated artefact establishes that rook denotes a chess piece here? definition
- What evidence excludes the bird sense or a decorative object without a chess role? boundary
Set-relative recognition
Identify the rook through the conventions of the particular set.
Rook design and designation
Record visible or tactile identifiers together with any explicit designation that establishes the token's role.
- Which silhouette, top features, markings, or tactile cues distinguish this set's rook from its other pieces? definition
- Who or what identifies this token as a rook when its design is unconventional or incomplete? provenance
Physical playability Assess whether this rook can be recognised, positioned, and manipulated on the intended board.
Square fit and stability
Relate the rook's base and standing behaviour to the board on which it is used.
Rook placement clearance
Record the footprint and observed stability needed to occupy one square unambiguously.
- What is the rook's base footprint relative to the usable area of its intended square? measurement
- Does the rook stand securely without obscuring square boundaries or interfering with neighbouring pieces? measurement
Recognition-preserving handling
Assess damage and grasping constraints that affect continued use as a distinguishable rook.
Rook damage and grasp
Record whether damaged identifying features, loose parts, or available grasp surfaces affect use.
- Has damage altered the features that distinguish this rook from the other pieces in its set? boundary
- Where can the agent securely grasp this rook, or is an agreed replacement needed before further handling? action
Rook role and continuity Track which side and rook role the physical token represents throughout play.
Side and participation
Connect the token to its effective role, side, and current place in the game.
Active rook assignment
Record whether this token currently represents an active rook and where that role is situated.
- Which side and declared game role does this physical token currently represent? definition
- Is it on a specific square, captured, spare, or awaiting placement, and what observation establishes that status? provenance
Origin and token substitution
Preserve the distinction between game-role history and changes of physical representative.
Rook role lineage
Record whether the role began in the initial position, arose through promotion, or was assigned in a custom setup.
- Did this rook role originate in the initial position, through a recorded promotion, or through an explicit setup assignment? provenance
- If the physical token is replaced, which role identity, side, square, and movement history must carry forward? action
Rook movement and castling Evaluate actions specific to the rook role using external board state and an identified ruleset.
Rank and file movement
Assess ordinary rook movement, captures, and attack lines without treating geometric reach as sufficient proof of move legality.
Rook lines and legal moves
Record the path, blockers, destination occupancy, and whole-position constraints relevant to a candidate action.
- Under the selected ruleset, does the proposed destination lie on an allowed rook line with no intervening piece? boundary
- Does destination occupancy permit the move or capture, and would the resulting position leave the moving side's king in check? action
- Which squares does this rook attack, distinguished from the moves it may legally make in the current position? measurement
Castling participation
Determine whether this particular rook can participate in the proposed castling action.
Rook castling eligibility
Connect the rook's identity and history to recorded castling rights and the rules governing the paired king movement.
- What verified history or authoritative game record establishes castling rights involving this rook? provenance
- For the selected ruleset and current position, are the required king conditions, clearances, and final king and rook squares satisfied? action
- If movement history is unknown, what further evidence is required before permitting castling? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these kinds and varieties hold for the sense of rook this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
- Other names and narrower kinds
- crazy rook, white rook, black rook
What it is Filled
A chess piece whose ordinary movement under standard chess rules follows a rank or file through unobstructed squares and which can participate with the king in castling when eligible, commonly represented by a tower-shaped physical piece.
In scope
- Recognition of a physical piece as a rook within its chess set
- Physical condition and suitability for placement and handling
- Assigned side and distinction between physical appearance and game role
- Current placement, capture status, and promotion-derived role
- Rook movement, attack relationships, and participation in castling under the selected ruleset
Out of scope
- The rook bird and its biological or ecological characteristics
- Complete board geometry and whole-game state
- King identity, condition, and general movement rules
- Player identity, tournament administration, and time controls
- Whole-set inventory, manufacture, valuation, and collecting history
Why it exists Filled
Enable an AI agent to recognise a physical chess rook, assess its condition and game role, and determine permitted handling or moves within an identified ruleset.
Distinguishing features Filled
- Within the identified set, the piece is designated as a rook by its recognised design, markings, or explicit role assignment; a tower silhouette alone is insufficient.
- Under standard chess rules, its ordinary movement follows a rank or file through unobstructed squares, distinguishing its role from a bishop or queen.
- Under standard chess rules, its ordinary move does not jump intervening pieces, distinguishing it from a knight.
- Its possible participation alongside a king in castling distinguishes the rook role from other non-king roles, although any particular rook may be ineligible.
- A rook-shaped ornament without an assigned chess role is distinguished from a game piece, while a substitute token may have a rook role without resembling a tower.
What robots and AI may and may not do Filled
Must not
- Move or remove a piece without authorization.
- Treat a tower-shaped object as a rook without evidence of its assigned chess role.
- Present an illegal rook move or ineligible castling move as permitted.
- Provide prohibited assistance during a game.
Only with a human decision
- Disputes about piece identity, assigned role or move legality require human adjudication.
- Replacing or repairing another person's damaged piece requires human authorization.
May
- Identify a rook within its chess set and record its condition, assigned side and game role.
- Explain rook movement and castling eligibility under the selected ruleset.
- Handle or move a rook when authorized and permitted by the game context.
Moral aspects Filled
- Accurate piece identification and rule application support fair play.
- Automated assistance must respect the players' agreement and applicable competition rules.
- Handling should respect ownership and accessibility needs.
Who is affected
- Players depend on accurate game state and fair assistance.
- Arbiters are responsible for resolving game disputes.
- Piece owners and custodians are affected by loss or damage.
Owners Filled
Steward
The owner or custodian of the chess piece or set.
Master systems
- Chess set inventory records may document physical ownership and condition.
- Game records may document the piece's assigned role and position.
Links to other meta-models Filled
parent
- Q12221306 - registry parent class
- Q3389555 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.rook
- Wikidata: Q137 (https://www.wikidata.org/wiki/Q137)
Direct properties required Filled
- Interpretation and identification confidence: confirmed chess rook | provisional chess rook | ambiguous | rejected
- Set-relative identifying features: observed silhouette, top design, markings, and set designation
- Assigned side: reference to a side in the current game | unassigned | unknown
- Effective game role: rook | another declared role | unassigned | disputed
- Placement and participation: on a referenced square | captured | spare | awaiting placement | unknown
- Role origin: initial rook | promotion-derived rook | setup-assigned rook | unknown
- Base footprint: millimetres, with shape or maximum width recorded
- Handling condition: stable and recognisable | unstable | damaged but usable | unsafe to handle | uncertain
- Castling-related movement history: verified unmoved | previously moved | ineligible by origin or assignment | unknown
Recognition required Filled
- A rook commonly resembles a tower with a battlemented top.
- Design, markings and assigned role within the identified chess set establish identity more reliably than silhouette alone.
- A substitute token may serve as a rook without resembling a tower.
Capabilities and actions required Filled
- Identify or flag a candidate rook using evidence from its set and declared role.
- Place, grasp, move, or replace the physical token according to its condition and the authorised task.
- Evaluate candidate rook moves and captures against the selected ruleset and referenced board state.
- Determine rook attack lines and their obstructions.
- Assess the rook's eligibility to participate in a proposed castling move.
- Record capture, promotion assignment, or token substitution while preserving game-role continuity.
Hazards and failure modes required Filled
- Confusing a piece's appearance with its assigned rook role can corrupt the recorded game state.
- Incorrect movement or castling eligibility can result in illegal moves.
- Damaged or unstable pieces can interfere with safe handling and reliable placement.
Standards and interfaces required Filled
- Directive 2009/147/EC on the conservation of wild birds, European Union.
Context of use required Filled
- A rook is a chess piece used in games, instruction and demonstrations on a chessboard.
- It moves along ranks or files through unobstructed squares and participates with the king in castling when the rules permit.
- Each player begins a standard game with two rooks on the corner squares of their back rank.
Sources Filled
- Wikidata item Q137: rook - identity and sense of the item
- Wikipedia: Rook (chess) - general description of the item
Open questions
- Does vr.tr.rook denote the chess piece, the bird, or another referent, and what registry evidence settles that ambiguity?
- Does an existing Vercy world model already own the chess-rook concept, requiring this registry entry to link to it?
- Which rulesets must be supported, especially standard chess, Chess960, or other variants with different castling conventions?
- What evidence is authoritative for role assignments, promotions, substitutions, and castling rights when observation is incomplete?
- Which set designs, tactile conventions, board dimensions, and manipulation systems must recognition and physical usability assessments support?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q137/spec.json