Theory
Here's why we're doing this today. Yesterday we built a bridge called B between A and C. Today we add one last bridge, and A natural minor is complete: F, the 6th. F sits between the pentatonic's 5th (E) and ♭7 (G) — more precisely, it's the note exactly a half-step above E. And that "half-step above" is the whole point of today.
A half-step is the stickiest, most magnetic relationship on a guitar. F is a note that's practically desperate to be pulled down into the E right below it. So F's most natural resolution is F → E (6th → 5th), sliding down a half-step. You'll feel today just how lyrical this sounds. If B was a bridge climbing up (to C), F is a bridge coming down (to E). Since they run in opposite directions, using them together gives your solos a rising-and-falling breath.
Of course, just like B yesterday, F is a passing tone. It's not an Am chord tone (A·C·E), so don't settle on it. There are two resolutions: the strongest is F → E (5th), and going a bit further around, F → E → D → C (♭3), eventually arriving at our home base C. Today F's coordinates in Box 1 are two spots: 5th string 8th fret and 2nd string 6th fret. Picture each sliding a half-step down into the E right below it (5th string 7th fret, 2nd string 5th fret).
See it
Alongside yesterday's B (green), today adds two spots of F (6th, highlighted in green) to the pentatonic — 5th string 8th fret, 2nd string 6th fret. Each is a bridge sliding a half-step down into the E (5th) right below it.
Today's drill. Measure 1 repeats the F → E (5th) half-step resolution, and measure 2 flows F → E → D → C (♭3), landing on our home base C.
Today's practice
0–10 min · Warm-up (BPM 85) Set the metronome to 85 and loosen up with everything so far — 3 minutes of the 3rd-interval sequence, 2 minutes of the A-B-C four-note run. Then spend 5 minutes on today's F → E half-step resolution (measure 1), slow. As you drop from F to E, let your fingers stay connected like they're "sliding." Drop to BPM 75 if it clumps.
10–20 min · Brain training (today's target = the two F spots) Metronome off. In Box 1, find and fret only F (6th). 5th string 8th fret, 2nd string 6th fret — just two spots. Every time you fret it, say out loud "pulled down a half-step to E," and add the motion of sliding immediately down to E. Pass when you can find both F's with your eyes closed and resolve each one to E.
20–40 min · Real-world improv (Am one-chord backing, 80–85 BPM) Put on an "Am backing track." Today's mission: every time you use F, resolve it to E or C. Ending on F is off-limits. Try using yesterday's B (bridge going up) and today's F (bridge coming down) together in one phrase — something like "A-B-C … F-E," a rise and fall in one breath, and it already starts sounding like a solo.
40–50 min · Record & reflect (recommended) Record 30 seconds of jamming with any recorder. Listen back and check one thing only: does the F → E half-step sound "sticky" and connected, or does it snap apart? If it snaps, you're lifting your finger too early. Hold F just a little longer, releasing right as E starts to ring. Slow down playback if you need to zoom in on that half-step moment by ear.
Today's done-when: you can find the two F spots with your eyes closed, resolve F → E smoothly five times or more, and resolve every F in the jam to E or C.
- Settling on F. Same issue as B. F isn't an Am chord tone, so lingering on it makes it float. Remember F is a magnet pulling down toward E, and always let it flow through.
- Snapping F → E apart. The magic of a half-step relationship is its "stickiness." Hold F just until right before E sounds, and that sticky quality comes alive. Lift your finger too early and they just become two separate, unrelated notes.
- Finger placement. On the 5th string, use finger 4 (pinky) for F (8th fret) and finger 3 for E (7th fret). On the 2nd string, finger 2 for F (6th fret) and finger 1 for E (5th fret). Stick to this placement and the half-step slide stays smooth.
- Mixing up B and F's direction. B resolves up (to C), F resolves down (to E) — opposite directions. If it's confusing, try a mnemonic: "B for boost (up), F for fall (down)."