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.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
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.
A medium-sized corvid (Corvus frugilegus) of the Palearctic, distinguished from other crows by a pale, largely featherless bill base in adults and by colonial nesting in treetop rookeries.
It can be 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..
Distinguishing features
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.
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
- 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
Characteristics
- Interpretation and identification confidence
- confirmed chess rook | provisional chess rook | ambiguous | rejected Prevents an unsupported interpretation of the registry name from becoming an asserted identity.
- Set-relative identifying features
- observed silhouette, top design, markings, and set designation Supports recognition in conventional, stylised, damaged, and accessible sets.
- Assigned side
- reference to a side in the current game | unassigned | unknown Determines friendly and opposing pieces without assuming material colour determines allegiance.
- Effective game role
- rook | another declared role | unassigned | disputed Separates the physical token's appearance from the role it currently represents.
- Placement and participation
- on a referenced square | captured | spare | awaiting placement | unknown Distinguishes a participating rook from an identical token beside the board.
- Role origin
- initial rook | promotion-derived rook | setup-assigned rook | unknown Helps interpret identity continuity and castling eligibility.
- Base footprint
- millimetres, with shape or maximum width recorded Helps assess square fit and clearance from adjacent pieces.
- Handling condition
- stable and recognisable | unstable | damaged but usable | unsafe to handle | uncertain Determines whether the piece can be placed, grasped, and distinguished reliably.
- Castling-related movement history
- verified unmoved | previously moved | ineligible by origin or assignment | unknown Returning a rook to its starting square does not establish that castling rights remain.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.rook
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 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.
The registry supplies no definition, and neither the word rook nor a tower-shaped object establishes the intended chess identity.
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.
A valid rook role can be represented by a physical token whose footprint, damage, or instability prevents reliable play or robotic handling.
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.
Promotions, captures, spare pieces, and substitutions make physical appearance insufficient to establish a rook's current participation or history.
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.
Rook movement depends on straight-line clearance, while castling additionally depends on historical rights and king-related conditions.
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.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
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.
- adult rook
- juvenile rook
- western Palearctic rook (C. f. frugilegus)
- eastern Palearctic rook (C. f. pastinator)
- Which of these kinds and varieties hold for the sense of rook this model covers, and on what evidence? provenance
What the second pass must settle
- 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?