Chess SAN → Pitch + Rhythm Event List

Single-column UI. If the duration table below shows “loaded”, your JS is running correctly.

Input

SAN (with x, +, #, O-O, O-O-O, promotions like e8=Q)

Seed (integer)

Basic collection (hex or commas)

Black uses inversion about 0: pc → (12 − pc) mod 12.

Rhythm (meter rules)

Starting meter numerator

Starting meter denominator 4 8

On capture: chance to ±1 beat next bar (%)

Pitch (range + castling tonic shift)

Center MIDI

Min MIDI

Max MIDI

O-O tonic shift: ±n

O-O-O tonic shift: ±n

Sign choice seeded random (+ or −) White + / Black − always + always −

Convert Reset

Piece → duration (editable)

Durations are in beats of the denominator (4 = quarter-beat, 8 = eighth-beat).

Duration table status: (initializing…)

Piece	Beats

Capture interval matrix (semitones 0–11)

On capture: chord pitch = main pitch + interval (mod 12), then wrapped into range.

Load sensible defaults Reset to 0

Output

Copy (TSV) Export CSV Clear

Meter is shown only when it changes. “Chord MIDI” appears only on captures.