curling
Enable an AI agent to recognise a curling activity, assess its playing state and determine which deliveries, sweeping actions and procedural decisions are available.
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 curling activity, assess its playing state and determine which deliveries, sweeping actions and procedural decisions are available.
Curling is an ice sport in which two teams of four players take turns sliding granite stones toward a circular target (the house) on a sheet of ice, using team strategy and sweeping to influence stone trajectory and placement.
It can be Identify the applicable curling format and determine the next permitted delivery.; Record a shot's intended line, weight, rotation and resulting stone positions.; Assess scoring order and flag comparisons that require measurement.; Suggest shot options using guards, accessible paths, stones remaining and last-stone advantage.; Check sweeping or stone-contact events against the applicable rules and flag required rulings.; Close an agreed end and update score, delivery order and the next end's setup..
Distinguishing features
The activity involves delivering curling stones along an ice sheet toward a circular scoring target called the house.
Play depends on stones coming to rest and altering access to the house through guards, draws, removals or other stone interactions.
Scoring is resolved by comparing eligible stones with the button and opposing stones, rather than by counting target impacts.
Delivery rotation and ice conditions affect curved stone travel; sweeping permissions and techniques depend on the curling format.
The activity progresses through ends with a defined stone allocation and delivery order, distinguishing it from an informal stone-sliding exercise.
Scope
+ Curling format, applicable rules and roles during play
+ Sheet geometry, ice conditions and their effects on stone travel
+ Delivery sequence, shot intent and execution
+ Sweeping permissions, actions and observed effects
+ Stone positions, end resolution and game progression
- Ice-rink construction, refrigeration and facility management
- Manufacture and maintenance histories of stones, brushes and delivery aids
- Athlete medical records and general fitness programmes
- Club administration, tournament scheduling and rankings
- Other target sports and industrial or cosmetic meanings of curling
Characteristics
- Activity format
- Team curling, mixed doubles, wheelchair curling, adapted or other declared format Determines which participation, delivery, sweeping and scoring provisions must be resolved.
- Governing rules
- Applicable rulebook, edition and local or event modifications Supports decisions about legal actions without treating one format's rules as universal.
- End and delivery state
- Current end, next delivering side, stones remaining and unresolved procedural events Establishes what can happen next and whether play may proceed.
- Stone position
- Coordinates in metres relative to a declared sheet reference, with stone footprint and uncertainty Supports assessment of scoring proximity, guards, clearances and boundary interactions.
- Stone eligibility
- Not yet delivered, pre-positioned, in motion, in play, removed or disputed Prevents a visible stone from being assumed to count or remain available for play.
- Last-stone advantage
- Side holding last delivery in the current end, with basis and any applicable qualification Changes tactical choices and links end outcomes to subsequent play.
- Observed ice response
- Travel time in seconds between named reference points and lateral deviation in centimetres under recorded shot conditions Grounds estimates of weight and curl in observations tied to a particular path and time.
- Shot intent
- Guard, draw, takeout, raise, freeze, combination or other declared intent Allows execution to be judged against an intended resulting position.
- Score status
- Provisional or agreed end score, cumulative score and pending measurements or rulings Separates a visual scoring estimate from an accepted result.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 12 findings · 22 questions.
Format and end setup Establishes which form of curling is being played and how its ends are constituted.
Stone allocation, participant roles and initial positions cannot safely be inferred from the word curling alone.
Curling format and authority
Connects the activity to the rules that govern its particular form.
Applicable curling provisions
Record the declared format and the authority for resolving format-dependent actions.
- Which curling format is being played, and is this a game, practice end or shot exercise? definition
- Which rulebook edition and event or local modifications govern delivery, sweeping and end setup? provenance
Sides, roles and stone allocation
Describes who acts, which stones belong to each side and how play begins.
Initial and next delivery state
Record the starting arrangement, participant assignments and remaining delivery sequence.
- Which side owns each stone, who is assigned to deliver or direct play, and which stones are pre-positioned if the format requires them? definition
- Which side delivers next, how many deliveries remain for each side and how was last delivery assigned? action
Sheet and ice response Represents the playing geometry and observed behaviour of stones on the current ice.
A curling shot depends on both marked boundaries and changing travel behaviour along its chosen path.
Sheet reference geometry
Locates stones and travel paths against the house, button and relevant lines.
Position and boundary evidence
Record geometry with enough precision to distinguish tactical position from a boundary ruling.
- Where are the button, house limits, hog lines, back lines and side boundaries in the chosen coordinate reference? measurement
- Which stone footprints touch or cross a relevant boundary, and is the observation precise enough to apply the governing rule? boundary
Path-dependent ice behaviour
Tracks observed speed and curl without assuming uniform ice across the sheet.
Observed weight and curl
Relate recent stone travel to path, rotation, sweeping and observation time.
- What travel times and lateral deviations have been observed on comparable paths, with which stones, rotations and sweeping actions? measurement
- Do recent observations justify changing the intended weight or line, and how uncertain is that adjustment? action
Shot planning and delivery Connects intended stone arrangements to delivery choices and observed execution.
Judging a curling shot requires knowing its tactical purpose and separating release execution from the final outcome.
Target arrangement and shot choice
Represents intended placements, contacts and acceptable misses.
Intended stone outcome
Express the shot as a desired change to the stone arrangement and scoring prospects.
- Which stone should finish where, which contacts are intended and what role should the resulting guard, draw or removal serve? definition
- Which shot options remain legal and reachable given protected stones, available paths, deliveries remaining and last-stone advantage? action
Release and execution
Captures delivery parameters and evidence needed to assess release legality and shot execution.
Delivered line, weight and rotation
Record intended and observed release conditions using declared measurement conventions.
- What line, weight and rotation were called, and what release direction, travel time and rotation were observed? measurement
- Was the delivery method and release compliant with this format, and what observation or official decision supports that assessment? boundary
Sweeping and stone interactions Tracks interventions and contacts while a shot develops.
Sweeping, collisions and accidental disturbance can change both the physical outcome and the legally accepted position.
Sweeping decisions
Relates permitted sweeping to the moving stone, its location and the intended result.
Permitted and observed sweeping
Record who swept, where and when, alongside the applicable permissions.
- Does this format permit sweeping, and who may sweep the relevant stone at its current location? boundary
- What sweeping was called and performed, over which segment of travel, and what change in motion was observed? measurement
Contacts and position remedies
Distinguishes normal stone collisions from disturbances requiring a procedural response.
Stone-contact sequence and ruling
Preserve the sequence of contacts and any discrepancy between observed and accepted resting positions.
- Which stones contacted one another, and was any moving or stationary stone touched or displaced by a person or equipment? measurement
- Does the applicable rule require removal, replacement, acceptance of positions or a ruling, and who is authorised to decide? action
House assessment and game progression Turns accepted resting positions into scoring decisions and the next playable state.
Proximity alone does not establish a completed end; eligibility, unresolved measurements and agreement also matter.
Scoring position and measurement
Assesses which eligible stones count and where evidence is insufficient.
Provisional count and disputed distance
Record scoring eligibility, relative proximity and any required measurement before positions are disturbed.
- Which stones are eligible to score, and how do their distances from the button compare with the nearest eligible opposing stone? measurement
- Which house-edge or proximity comparisons remain unresolved, and what measurement or authorised decision is needed before stones may be moved? action
End closure and continuation
Records the accepted result and determines whether another end or another procedural step follows.
Accepted end and next state
Connect the agreed end outcome to cumulative score, subsequent setup and completion conditions.
- What end score was agreed or awarded, by whom, and are any measurements or rulings still pending? provenance
- Under the governing format, does this result lead to another end, an extra end or game completion, and what delivery order and setup follow? action
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.
- Olympic / World Curling Federation curling (standard 10-end, 4-player teams)
- Mixed curling (two men and two women)
- Mixed doubles curling (one man and one woman, 8 ends, two stones each plus a pre-placed stone)
- Wheelchair curling (no sweeping; delivery from a wheelchair, typically 8 ends)
- Junior curling (under-21 age class)
- Senior / masters curling (age-restricted recreational and championship play)
- Stick curling / delivery-stick play (delivery aid; used in adaptive and some recreational formats)
- Bonspiel / recreational club curling (social tournament and league play under local house rules)
- Which of these kinds and varieties hold for the sense of curling this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q136851 - item for the sport of curling
- Which of these identifiers and schemes hold for the sense of curling this model covers, and on what evidence? provenance
What the second pass must settle
- Does the registry intend curling to encompass wheelchair, mixed doubles and other adapted formats within one model, and where should format-specific extensions live?
- Which authoritative rule editions should ground delivery, sweeping, protected-stone, disturbance and scoring decisions for the supported formats?
- What positional and timing precision is sufficient for tactical assistance, and which decisions require approved measurement procedures or an authorised official?
- How should the model distinguish effects of ice path, individual stone behaviour, release rotation and sweeping when observations cannot isolate them?
- Should timed-play interruptions, concessions and event-specific completion procedures be represented here or supplied by a linked competition model?