7-String Guitar Chord Chart and Tabs in fake 8 string Tuning

SibmM13, Sib-M13, Sib minmaj13
Notes: Si♭, Re♭, Fa, La, Do, Mi♭, Sol
6,10,8,6,7,6,6 (1431211)
6,6,8,10,7,6,6 (1134211)