A chord symbol like Cmaj7 or G7 isn’t a photo to memorize — it’s an interval formula: a seventh chord is a triad with one more note added, as the guitar-theory site Applied Guitar Theory puts it. Read the formula and any chord chart opens up, including why the tritone earned its “forbidden” nickname and how to get from open chords to barre chords without the frustration.
Strings on a standard guitar: 6 · Major triad formula: 1, 3, 5 · Dominant 7th formula: 1, 3, 5, ♭7 · Tritone span: Augmented 4th or diminished 5th (three whole steps)
Quick snapshot
- Major triads are built from scale degrees 1, 3, and 5 (Guitar-Chords.org.uk).
- A dominant 7th is a major triad with a minor seventh added (Applied Guitar Theory).
- The tritone spans three whole steps — an augmented fourth or a diminished fifth (National Geographic).
- Where the “Jesus chord” nickname actually came from.
- Which chord is objectively the hardest to play.
- An official chord chart for “Like A Prayer” (not part of the reviewed inputs).
- The F–B tritone is the classic example in the diatonic C-based note system (Skeptical Inquirer).
- 13th-century theory called the tritone a “perfect discord” (Medieval Music & Arts Foundation).
- Practice path: open chords G, C, D → 7th forms → one barre shape.
- Read symbols as interval stacks; change the root to transpose.
- Practice changes in real songs, not just chord drills.
Six formulas carry most of the chord work a beginner meets; the pattern worth seeing is that every one of them is a stack of scale degrees, not a random collection of fretted notes.
| Chord type | Interval formula | Reference |
|---|---|---|
| Standard guitar strings | 6 | Standard instrument definition |
| Major triad | 1–3–5 | Guitar-Chords.org.uk |
| Minor triad | 1–♭3–5 | Derived from the minor-7th formula below |
| Major 7th | 1–3–5–7 | Jazz Guitar Lessons |
| Dominant 7th | 1–3–5–♭7 | Jazz Guitar Lessons (same source) |
| Minor 7th | 1–♭3–5–♭7 | Jazz Guitar Lessons (same source) |
What notes are in each guitar chord?
Every chord name is a compact formula. The capital letter tells you the root — the note everything else is measured from — and the symbols after it tell you which notes to stack above that root. On guitar, that stack becomes a set of fretted strings ringing together, which is why the same chord can be played in many places on the neck.
Most beginners start with triads: three-note chords built from the first, third, and fifth degrees of a scale. Major triads are built from scale degrees 1, 3, and 5 (Guitar-Chords.org.uk), and that pattern is the grammar behind every chord name you’ll read below.
What does “root, third, fifth” mean?
- Root (1): the note the chord is named after.
- Third (3): the degree that sets the mood; leave it natural for major, flatten it to ♭3 for minor, as the key table shows.
- Fifth (5): the stabilizing interval; flatten it to ♭5 for the diminished sound — the tense one we circle back to later.
A chord shape on the fretboard is just the formula laid out on strings. The same 1–3–5 stack becomes G, C, or D depending only on where you place the root.
What this means: if you can find the root, the third, and the fifth on the neck, you can build any triad you haven’t memorized yet.
What are the four types of chords?
The four basic chord types are major, minor, augmented, and diminished. They use the same three scale degrees — 1, 3, 5 — but each type changes one of those notes, and the changed note is what your ear hears as the chord’s personality.
How do chord formulas change for augmented and diminished chords?
- Major: 1–3–5 — root, major third, perfect fifth.
- Minor: 1–♭3–5 — same skeleton, flattened third.
- Augmented: 1–3–♯5 — major chord with a sharpened fifth.
- Diminished: 1–♭3–♭5 — both the third and the fifth are flattened (Mental Floss).
Of the four, the diminished triad is the one to watch: because the fifth is flattened, the root and the fifth sit a tritone apart — six half-steps — the tense interval behind the “forbidden chord” stories later below (Mental Floss).
The pattern: major and minor do the heavy lifting in most songs; augmented and diminished are rarer colors, and the altered fifth is exactly what makes them feel unsettled.
Why do some guitar chords have a 7?
A “7” in a chord name is an instruction: add the seventh scale degree above the root to the stack. That’s the “triad plus one more note” idea from the intro, applied to a specific interval — the seventh.
The version you’ll meet first is the dominant 7th, written as a plain “7”: a major triad with a minor seventh added — the definition from the snapshot above. Its formula, 1–3–5–♭7, is the dominant-7th row of the key table.
What is the 7 chord rule?
- A “7” means a seventh interval is added above the root.
- Plain “7” = dominant: major triad + minor seventh.
- “maj7” = major triad + major seventh; “m7” = minor triad + minor seventh; the key table has all the formulas.
Dominant 7th chords most often sit on the fifth degree of a major scale — the spot that points back to the tonic — so a G7 in the key of C usually means a C chord is on the way.
The implication: the “7” rule is just a stacking rule. Read the symbol, add the interval, and the chord is already named.
What are major 7 chords?
A major 7th chord (written “maj7”) is a major triad plus the major seventh — formula 1–3–5–7, the maj7 row of the key table above. The major seventh is the note a half step below the root, and that half-step gap gives maj7 chords their soft, shimmering sound.
Take Cmaj7: C is the root, E is the major third, G is the perfect fifth, and B is the major seventh. Fret those notes and you have the intro sound of countless R&B and pop records.
Can you give me an example of a seventh chord?
- Cmaj7 = C–E–G–B (1–3–5–7): major triad, major seventh.
- C7 = C–E–G–B♭ (1–3–5–♭7): same major triad, but the seventh is a half step lower.
- Am7 = A–C–E–G (1–♭3–5–♭7): minor triad, minor seventh.
Play Cmaj7 and C7 back to back and you’ll hear the whole difference: one note changes (B to B♭), and the chord goes from dreamy to bluesy.
The trade-off: maj7 sits still and luxurious; the dominant 7, with its flat seventh, leans forward and asks for resolution.
How to identify 7 chords?
Reading a 7th-chord symbol is a two-step: identify the triad quality, then identify the seventh quality. The table below turns both steps into a lookup — the same formulas from the key table, organized by symbol.
Can you give me a list of all seventh chords?
This lookup groups the same formulas by symbol, so the triad quality and seventh quality are visible in one glance.
| Symbol | Triad | Seventh | Formula | Reference |
|---|---|---|---|---|
| maj7 | Major | Major 7th | 1–3–5–7 | Key table above |
| 7 | Major | Minor 7th | 1–3–5–♭7 | Key table above |
| m7 | Minor | Minor 7th | 1–♭3–5–♭7 | Key table above |
| m7♭5 | Diminished | Minor 7th | 1–♭3–♭5–♭7 | Mental Floss (diminished core) |
How to read it: maj7 keeps a major triad and raises the seventh; a plain 7 keeps the major triad but flattens the seventh; m7 flattens both the third and the seventh. The rarer dim7 stacks minor thirds all the way up — a diminished triad with a diminished seventh — and it’s the chord that sounds like a movie villain sneaking down a hallway.
What this means: four formulas replace a thousand chord diagrams. Read the symbol, stack the intervals, and find the root on the neck.
What is the forbidden chord on guitar?
The “forbidden chord” isn’t one shape — it’s an interval. The tritone spans three whole steps, exactly half an octave, written as an augmented fourth or a diminished fifth — the definition already cited in the quick snapshot above. In the C-based natural note system, the classic pair is F–B, with B–F working the same way downward.
You’ve actually met a tritone already: every dominant 7th chord contains one between its major third and its minor seventh — an interval baked into the 1–3–5–♭7 formula from the key table.
What is a Jesus chord?
- “Jesus chord” is not a standardized chord quality — treat it as a colloquial nickname with no universal formula.
- The exact origin of the nickname is unclear in the sources reviewed here.
- The documented historical label belongs to the tritone: diabolus in musica, discussed below.
Here’s where the story needs a correction. There is no reliable evidence that the Catholic Church formally banned the tritone as the devil’s interval; the term diabolus in musica — “the devil in music” — belongs to later music-theory writing, not to a medieval church decree (Skeptical Inquirer).
The “devil’s interval” nickname is real; the church-wide ban isn’t. The scary story collapses into a great-sounding tension once you read the actual history.
The practical reason earlier musicians kept their distance was mundane: the tritone is dissonant, and it is genuinely hard to sing in tune (National Geographic). Thirteenth-century theory classified it as a “perfect discord” (Medieval Music & Arts Foundation) — noticed and named, in other words, not excommunicated.
Why this matters: the tritone never needed a ban to be powerful. It’s the dissonance that makes resolution feel earned — and it’s been the engine of blues and metal ever since.
What is the hardest chord to play on a guitar?
Ask ten guitarists for the hardest chord and you’ll get ten answers — difficulty on guitar is subjective, and the research behind this guide treats it that way. The most common early wall, though, is the barre chord: a shape where one finger presses across several strings while the others fret the rest.
The F major barre chord at the first fret is the classic test. It forces the index finger to press across all six strings while the other fingers stretch into a full major-triad shape — and most beginners meet it before their hands have built any of the required strength.
Which barre chords are hardest for beginners?
- F major (first fret): the first barre most players attempt, and the one that exposes weak finger strength fastest.
- B minor (second fret): the same barre challenge with a minor third added to the shape.
- Movable 7th barres: a barre plus a fourth-finger stretch, often the last piece of the puzzle.
- Any barre mid-song: most players can fret a barre slowly; playing it in time is where it falls apart.
The fix is the same for all of them: slow repetitions, checking that every string rings out, watching your thumb position, and lowering the guitar’s action if the strings fight you. Difficulty is a product of finger strength, string action, and consistency — not a fixed property of the chord itself.
A barre chord is a strength tax paid once to unlock the whole fretboard: slide the F shape up two frets and it becomes G, up four and it’s A — one pattern, twelve chords.
The payoff: once one barre shape is clean, you own twelve chords, because the shape is movable. The hardest chord on the guitar is also the most efficient one to learn.
How to learn guitar chords step by step
This path follows the formula-first idea behind this guide: learn a chord, learn its intervals, then move the same intervals up the neck.
- Get comfortable with the open chords G, C, and D. They’re the usual starting set for beginners, and they all use the same 1–3–5 stack.
- Name the notes you’re already playing. G major is G–B–D, C major is C–E–G, D major is D–F♯–A. Same formula, different roots.
- Turn two of them into 7th chords. G7 and Cmaj7 are small finger changes from G and C, and they make the “add the seventh” idea physical.
- Learn one barre shape. Start with the F major barre at the first fret, slowly, making sure all six strings ring.
- Slide it. Move the same shape to the 3rd fret for G, the 5th fret for A. Same chord formula, new root.
- Practice changes in real songs. Chord changes stick when they’re timed, so pick a slow song and run the changes until they’re boring.
Most beginners grind barre chords in isolation and quit in week three. The fix is context: put the barre inside a two-chord loop, like F to C, so the hand learns a motion, not a single grip.
The reason this works: every step reuses the last, which is how songs actually use chords — you’re training the fretboard logic, not a collection of muscle memories.
Confirmed facts and open questions
The formulas in the key table are solid, and the wildest story — the church ban — is mostly myth. What stays genuinely fuzzy is a handful of nicknames and rankings.
Confirmed facts
- The tritone spans three whole steps — an augmented fourth or a diminished fifth (National Geographic).
- Thirteenth-century theory classified the tritone as a “perfect discord” (Medieval Music & Arts Foundation).
- The seventh-chord formulas in the key table (maj7 = 1–3–5–7, 7 = 1–3–5–♭7, m7 = 1–♭3–5–♭7) come from the Jazz Guitar Lessons rows above.
What’s unclear
- Where the “Jesus chord” nickname actually came from.
- Which single chord is objectively the hardest to play.
- An official chord chart for “Like A Prayer” — not part of the research inputs reviewed here.
- How much Guido d’Arezzo’s medieval hexachord system was engineered around the F–B tritone; sources call it plausible, not proven.
- The tritone’s modern label as a “sharp eleven” (♯11) in chord notation — a real convention, but one the research treats with medium confidence.
The takeaway for skeptical readers: believe the formulas, double-check the nicknames. The chord math is settled; the folklore around it is not.
What the sources say
Two sources anchor this guide’s biggest claims — what a seventh chord is, and whether the church really banned the tritone. Here’s the core position each one takes, with the authority context.
A seventh chord is a triad with a seventh added on top, and a dominant seventh is specifically a major triad with a minor seventh. The formula, not the grip, is what defines the chord.
— Applied Guitar Theory (guitar-theory education site)
There is no reliable evidence that the Catholic Church formally banned the tritone as the devil’s interval; “diabolus in musica” is a later music-theory phrase, not a medieval decree.
— Skeptical Inquirer (science and myth investigation)
The consistent thread: the chord science is straightforward, while the scary story around the tritone is a later invention that outlived its source.
The takeaway
The difference between a stuck beginner and a fluent one usually comes down to a shift in mindset: chords are not a wall of pictures to memorize, they’re a small set of interval formulas played in different positions. Learn the triad stack (1–3–5), learn which seventh each symbol wants (7 or ♭7), and learn one movable barre shape, and you can build chords you’ve never seen before. For the beginner sitting with a new guitar and a songbook full of symbols they don’t yet recognize, the choice is clear: learn the formulas now, or relearn them later, one frustrated chord change at a time.
Frequently asked questions
What are the chords for the song “Like A Prayer”?
The research inputs reviewed here don’t include an official chord chart for “Like A Prayer,” and no verified chart was part of the facts reviewed here. Use the formulas above to read any chart you find: spot the triads, flag the 7th chords, and follow the progression through each song section.
What are the first guitar chords a beginner should learn?
G, C, and D are the usual starter set — three major triads that share the same 1–3–5 formula and show up in a large share of easy songs. Adding E minor and A minor gives you a comfortable open-chord foundation with both major and minor sounds covered.
What is the difference between a major chord and a minor chord?
One note. A major chord uses a major third (1–3–5); a minor chord flattens the third (1–♭3–5). That single half-step is the entire difference between the bright major sound and the darker minor sound — and the same ♭3 shows up in minor 7th and diminished chords.
How can I switch between guitar chords faster?
Practice the change in slow motion first, keeping your fingertips close to the strings and lifting only what has to move. Then run the two-chord loop with a metronome at a crawl and raise the speed only when every note rings clean. Fast switching is slow switching, sped up.
Are barre chords movable guitar chords?
Yes — that’s their superpower. The index finger acts like a movable nut, so one shape slides up the fretboard and becomes a new chord: an F barre shape at the 5th fret is A, and at the 7th fret it’s B. One hand position, twelve chords.
What does the “m” in a chord name mean?
The lowercase “m” means minor, and it changes the third: a minor triad is 1–♭3–5 and a minor 7th chord is 1–♭3–5–♭7. If you see “maj7,” the m belongs to the word “major” and modifies the seventh instead — that’s a major 7th chord, not a minor one.
If a chord symbol still looks unfamiliar, run it through the key-table process: name the root, identify the triad quality, then add the seventh.
Victoria Hayes is Editor-in-Chief at Aussie Wire Hub, overseeing editorial standards, publication decisions and corrections.