A9+♯5+♭2
A dominant ninth, add sharp fifth, add flat second

Choose audio sample set:
MSK 007 Leapfrog VCF
(patch;
see
in online store)
MSK 009 Coiler VCF
(patch;
see
in online store)
Equivalent chord symbols: A9+♯1+♯5, A9+♯1+♯12, FM11♯5+♯4, FM11♯5+♭5, FM11♯5+♯11, D♭13♯5♯9♯11.
Notes in this chord: A, B♭, C♯, E, E♯, G, B. Integer notation: {1, 4, 5, 7, 9, 10, 11}.
Nearby chords (one less note): A9+♯1, A9+♯5, FM11♯5, FM11♭5, A9♯5+♯1, A+2+♯1+♯5, G13♯9♯11-5.
Nearby chords (one more note): G13♭5+♯2, A13♭13+♯1, D♭13♯5♯9+♯4, G13♯5♯11+♯2, D♭13♯9♯11+♯5.
Parallel chords (same structure, different root): C9+♯5+♭2, D9+♯5+♭2, E9+♯5+♭2, F9+♯5+♭2, G9+♯5+♭2, B9+♯5+♭2, C♭9+♯5+♭2, D♭9+♯5+♭2, E♭9+♯5+♭2, F♭9+♯5+♭2, G♭9+♯5+♭2, A♭9+♯5+♭2, B♭9+♯5+♭2, C♯9+♯5+♭2, D♯9+♯5+♭2, E♯9+♯5+♭2, F♯9+♯5+♭2, G♯9+♯5+♭2, A♯9+♯5+♭2, B♯9+♯5+♭2.
This chord contains too many notes to play on the 6 strings of guitar standard EADGBE tuning (change tuning or instrument).