A grip does not know its own root. Hold the four notes and they are nothing yet. A bassist's D turns the major-scale grip into Dm6/9, a G turns it into G13, a D♭ turns it into an altered dominant. Fluent pianists think in shapes, not spellings: a small set of grips, each understood deeply, beats a catalog of hundreds of chord diagrams.
The four grips
Each grip is a subset of exactly one parent scale, and those four scales are the four harmonic engines of modern jazz. Every reading below is derived and machine-verified from pitch-class arithmetic, not hand-typed.
Grip 1 · Major scale
Major-scale grip
E–F–A–B
ii · V · tritone sub, one motionless hand
| Bass | Chord | Rating |
|---|---|---|
| F | Fmaj7(♯11) | ★★★ |
| G | G13 | ★★★ |
| D | Dm6/9 | ★★★ |
Grip 2 · Whole-tone scale
Whole-tone grip
D–E–G♯–B♭
Four altered dominants, two tritone-twin pairs
| Bass | Chord | Rating |
|---|---|---|
| C | C9(♯5) | ★★★ |
| G♭ | G♭9(♯5) | ★★★ |
| E | E7(♭5) | ★★★ |
Grip 3 · Diminished
Diminished grip
B–D–F–A♭
Eight names: four dom7♭9 + four dim7
| Bass | Chord | Rating |
|---|---|---|
| D♭ | D♭7♭9 | ★★★ |
| E | E7♭9 | ★★★ |
| G | G7♭9 | ★★★ |
Grip 4 · Melodic minor
Melodic-minor grip
D–E♭–G–B
The tonic chord of melodic minor + its modes
| Bass | Chord | Rating |
|---|---|---|
| E♭ | E♭maj7(♯5) | ★★★ |
| C | Cm(maj9) | ★★★ |
| F | F13(♯11) | ★★ |
One rule: the bass assigns meaning
A four-note set has twelve possible bass notes, and each bass reinterprets the same intervals into a different chord. Learn one grip well and you have not learned one chord, you have learned up to eight. The four parent scales below are the harmonic universes those readings come from.
| Grip | Notes | Parent scale | Symmetry | Strongest readings |
|---|---|---|---|---|
| Major-scale grip | E–F–A–B | Major scale (C major contains E–F–A–B) | None | Fmaj7(♯11) · G13 · Dm6/9 · D♭7(♯9,♭13) |
| Whole-tone grip | D–E–G♯–B♭ | Whole-tone scale (C whole tone) | tritone (two pairs) | C9(♯5) · G♭9(♯5) · E7(♭5) · B♭7(♭5) |
| Diminished grip | B–D–F–A♭ | Diminished (octatonic) scale | minor 3rd and tritone | D♭7♭9 · E7♭9 · G7♭9 · B♭7♭9, and 4 more |
| Melodic-minor grip | D–E♭–G–B | Melodic minor (C melodic minor) | None | E♭maj7(♯5) · Cm(maj9) |
One hand, three functions: ii, V, tritone sub
The most useful fact in this atlas: over D the major-scale grip is the ii chord (Dm6/9), over G it is the V chord (G13), and over D♭, a tritone from G, it is the altered substitute D♭7(♯9,♭13). The hand never moves, the bass walks. This is tritone substitution as a physical fact rather than a theory rule, and it works because E–F–A–B sits on the intersection of C major and D melodic minor, the two scales those chords come from.
Where the hand sits: the register rule
Close four-note voicings live with their bottom note roughly between F3 and C4, the fourth below middle C. Lower, the intervals blur into mud: as a working limit, keep minor 3rds from sitting below C3 and major 3rds below B♭2. This is acoustics, not taste. Closely spaced overtones stop being separable low on the instrument.
How the grip system works
When a bass note lands below a grip, the intervals from that bass to each grip note spell out the chord quality. The diminished grip is symmetric under the minor 3rd, so it reuses across all four diminished-cycle chords. The whole-tone grip is tritone-symmetric: C9(♯5) and G♭9(♯5) are the same hand position with different basses.
The ratings measure functional strength. Three stars means every defining chord tone is present. Two stars means the reading is useful but one key tone is implied. A cross marks an avoid-note collision or an ambiguous quality that no bass rescues.
Frequently asked
What is a piano voicing?
A voicing is the specific arrangement of a chord's notes under the hand: which chord tones you keep, which you omit, and the order they stack in. One chord symbol admits many voicings. A rootless voicing omits the root and lets the bass supply it.
How many rootless grips are there?
Four canonical grips, each a subset of one parent scale: the major-scale grip (E–F–A–B), the whole-tone grip (D–E–G♯–B♭), the diminished grip (B–D–F–A♭), and the melodic-minor grip (D–E♭–G–B). Between them they cover the dominant, diminished, and tonic-minor worlds of working jazz harmony.
Why does one hand shape have many chord names?
A chord name is a relationship between the notes and a bass. A four-note set has twelve possible bass notes, and each bass reinterprets the same intervals. Hold E–F–A–B and it is Dm6/9 over D, G13 over G, and D♭7(♯9,♭13) over D♭ (the ii chord, the V chord, and the tritone substitution) without moving the hand.
What register should rootless voicings sit in?
Keep the bottom note of a close four-note voicing roughly between F3 and C4. Lower than that the close intervals blur: minor 3rds should not sit below C3, major 3rds below B♭2. That is an acoustic limit, not a style choice.