B13b9 chord

B13b9 chord for piano presented by keyboard diagrams.
Explanation: The B13b9 alter the B13 by the change of one note. The B thirteenth flat ninth is a seven-note chord, but due to practical circumstances, one or more notes (the fifth primarily) are omitted. The chord name can also be written as B13(b9) or B13-9.
Theory: Compared to B13 the ninth tone in the chord is flattenedThe tone is one half step lower.

B13b9

B13b9 chord diagram
Notes: B - D# - F# - A - C - E - G#

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B13#11 polychord

Explanation: The image below shows a polychord version of the B13#11. The chord is played in two parts with both hands.

B13#11 chord diagram
Polychord B7 (LH), C# (RH)

B chord categories

B Bm B7 Bm7 Bmaj7 BmM7 B6 Bm6 B6/9 B5 B9 Bm9 Bmaj9 B11 Bm11 Bmaj11 B13 Bm13 Bmaj13 Badd B7-5 B7+5 Bsus Bdim Bdim7 Bm7b5 Baug Baug7