The C major chord set page is the most common entry point in piano education, but the rankings inside that cluster split across 24 keys. Players who play in F-sharp minor, in A-flat major, or in modal keys all search for their context. A reference that covers only the white-key majors leaves 19 indexable URLs on the table.

SleekRank reads one row per key from your sheet or JSON file and produces an indexable URL like /piano/key/f-sharp-minor/. The same row drives the headline, the table of diatonic chords, the inversion variations, the fingering diagrams for both hands, and the related-keys grid powered by parallel and relative-key columns.

The list-mapping pattern carries the seven diatonic chords as a JSON array. Each chord element holds the chord name, Roman numeral, primary inversion, and fingering. SleekRank renders one chord block per element into the base page. Cross-link by relative key with one column, by parallel key with another, by mode with a third. The catalog organizes itself across the entire circle of fifths.

Piano theory search splits across 24 keys and a half dozen modes, but the search demand concentrates per-key. A student practicing in F-sharp minor wants the F-sharp minor reference, not a glossary buried under C major. A site that holds a dedicated, well-cross-linked URL for every key captures the long tail in a way that a single glossary page cannot.

Hand-publishing 24 key pages with consistent Roman numeral display, accurate fingering diagrams, and reliable cross-links is a real editorial commitment. Different contributors format chord blocks differently, the relative-key sidebar falls out of date as new keys ship, and the catalog often stalls at the most common eight keys. SleekRank pushes all that variation into the source data.

The diatonic chord set is a JSON array, the fingerings are nested arrays, the relative and parallel keys are columns. The template is one file that handles every key identically. Adding a modal key or an obscure enharmonic spelling is a single row append.

The result is a complete piano theory reference that grows by data, not by editorial time, and that captures the full distribution of search demand across the entire circle of fifths.