Chord "Deux" Jour Challenge: B7 and D#m7b5

The Chord "Deux" Jour Challenge means learning or expanding upon two chords per day for 49 days (USA Thanksgiving off). Check out the full list here.

Each chord map attempts to appeal to both beginners and intermediate/advanced guitarists and keyboardists. Simple chord shapes for beginners are provided with the following finger system:

1 index finger
2 middle finger
3 ring finger
4 little finger
o play open string
x do not play open string
( bar one finger over more than one string
T that rare occasion that I recommend you use your thumb to fret a note

Our first chord of the day is B dominant 7th, which contains a major triad and a minor-7th note, so it's B7:

Guitarists, the B7 chord shape above is the last open chord. Open chords, by the way, usually refer to chord shapes that occur within the first three frets and have open strings. Other examples include Dm, Am, C, Em, G, D, A, E, Dm7, Am7, Em7, G7, D7, Dmaj7, Amaj7, E7 ...

No, I spoke too soon -- C7, which we'll deal with on the last day of the Chord "Deux" Jour Challenge, is the final open chord. Stay tuned.

Keyboardists, if you know the B chord and the D#dim chord, then you know the B7 chord.

The next chord is D-sharp minor (minor) 7th flat 5th, or D#m7b5:

Guitarists, take the moveable m7b5 chord shape, and go to the 6th fret.

Keyboardists, if you know D#dim and F#m, then you know D#m7b5.

Two more tomorrow. Cheers!