7-String Guitar Chord Chart and Tabs in Drop a Tuning

SibM13, SibΔ13, Sib maj13
Notes: Si♭, Re, Fa, La, Do, Mi♭, Sol
10,10,8,8,8,10,8 (2311141)
8,10,10,8,8,10,8 (1231141)
10,8,8,8,8,10,10 (2111134)
8,8,10,8,8,10,10 (1121134)