right and left · one octave and two
Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.
Three sizes in one archive — from a sheet on the fridge to a poster on the wall.
The filled key marks the crossing. The circled number is the finger that makes it.
A scale stumbles not because the fingers are weak, but because the hand reaches sideways after the thumb — and hangs there for an instant.
In fact the thumb tucks under the palm early, while the earlier notes are still sounding: by the moment of the crossing it is already waiting beneath its key.
So what you practise is not the crossing itself but what precedes it. The hand stays put, and the scale stops limping.
Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 7 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.
two shapes, twelve chords each
12 keys · key signatures · relative minors
one coil or two · six builds · where it sits along the string, and how high above it
15 chords every beginner starts with · standard tuning E A D G B e