# Analysis result

The candidate at window W3 is a clear tonic double return. Beginning at beat 4 of W3 measure 0, the melody restates the opening pickup figure (A5 with grace note B5, then G5–F#5; EV0266–EV0269 mirroring EV0001–EV0005), and the following five measures (E017–E021) reproduce the opening measures (E002–E006) essentially note-for-note in both melody and bass, over D-major tonic harmony under the two-sharp home key signature. The pre-candidate window prolongs the dominant A (repeated A–C#–E chords in E010–E011) colored by modal mixture (B♭ and F♮ in E012–E014), and W3 measure 0 ascends chromatically F#–G–G#–A into the returning pickup while the bass falls silent for the whole measure, recreating the unaccompanied opening texture. The continuation window then tracks the opening rotation exactly for three more measures (E022–E024 matching E007–E009) before cadencing in D and restarting the theme an octave lower — recapitulatory behavior, not sequence or continued development.

## Run metadata

- Analyst model: claude-fable-5 (Claude Fable 5, Anthropic), running in a Claude agent CLI session.
- Sampling settings: not observable from within the session.
- Tools and external data: available in the harness but not used; the analysis relied solely on the embedded dossier. No internet access, source scores, or prior annotations were consulted.

## Machine-readable result

```json
{
  "schema_version": "2.1.0",
  "analyst_model": "claude-fable-5",
  "case_id": "CASE-Q2R9",
  "cues": {
    "tonal_stability": {
      "score": 4,
      "evidence_ids": ["E017", "E019", "E021", "E025", "E027"],
      "reason": "Observed: return harmonized by D-F#-A bass (EV0273-0279), later cadence to D with D pedal (E025-E027). Inference: home tonic D major is structurally stable at and after the candidate."
    },
    "thematic_correspondence": {
      "score": 4,
      "evidence_ids": ["E001", "E002", "E016", "E017", "E021"],
      "reason": "Observed: pickup figure and five subsequent measures match the opening's pitches, rhythms, grace note, and bass nearly exactly (E017-E021 vs E002-E006). Inference: identity-level, extended opening-theme return."
    },
    "preparation_strength": {
      "score": 3,
      "evidence_ids": ["E010", "E011", "E012", "E014", "E015", "E016"],
      "reason": "Observed: sustained A-major (dominant) chords, mixture with B-flat and F-natural, then chromatic ascent F#-G-G#-A with bass tacet before the pickup. Inference: substantial dominant and rhetorical preparation, though no explicit cadential dominant chord at arrival."
    },
    "proportional_location": {
      "score": 3,
      "evidence_ids": ["E016"],
      "reason": "Observed: dossier places the candidate 120 of 408 quarter notes into the second part (about 29 percent). Inference: compatible with a recapitulatory division after a shortish development, though somewhat early."
    },
    "rhetorical_emphasis": {
      "score": 2,
      "evidence_ids": ["E001", "E016"],
      "reason": "Observed: bass rests the full candidate measure, restoring the opening's unaccompanied-pickup texture and register; no dynamics or articulations anywhere in the dossier. Inference: textural highlighting supports arrival, but dynamic evidence is absent."
    },
    "rotational_continuation": {
      "score": 4,
      "evidence_ids": ["E007", "E008", "E009", "E022", "E023", "E024", "E025", "E027"],
      "reason": "Observed: continuation matches the opening rotation for three measures (E022-E024 vs E007-E009), then cadences in D and restarts the theme an octave lower. Inference: behaves as recapitulation, not sequence or development."
    }
  },
  "status_distribution": {
    "not_recapitulation": 0.03,
    "off_tonic_recapitulation": 0.01,
    "tonic_double_return": 0.96
  },
  "suspected_recognition": {"level": "style", "confidence": 0.5},
  "case_note": "Near-literal tonic return of the opening theme with matching bass, prepared by dominant prolongation with modal mixture and a chromatic melodic ascent; continuation tracks the opening rotation and cadences in the home key, strongly supporting a tonic double return."
}
```

## Limitations

Missing dossier evidence: no dynamics, tempo, or expressive directions appear in any window despite coverage claiming completeness, weakening the rhetorical-emphasis cue; no exposition-length or full-movement context beyond the single 120/408 ratio limits the proportional cue; harmonic function must be inferred from pitch content since no chord labels are given. Analytical uncertainty: the return's location at roughly 29 percent of the second part is early for some sonata norms, and the absence of an explicit cadential dominant at the arrival leaves preparation strength partly inferential. The idiom felt broadly Classical; this familiarity was not used as evidence.
