Summary of final outcomes for simulations of circular binaries consisting of a BH and a 30 M_⊙ star at a metallicity of Z_⊙/10, and a CE efficiency parameter α_CE = 1. Horizontal dotted lines indicate boundaries for an interaction before different evolutionary stages of the star. For systems that undergo stable MT, black horizontal lines indicate regions where the donor exceeded the L₂ equipotential, while cross hatched regions mark regions where also the L₃ equipotential is exceeded. Black rectangles indicate systems that do not interact or would result in a Roche lobe filling system at ZAMS. Systems that undergo stable MT or eject their envelope during CE evolution are denoted by “st. MT” and “CE ej.”, respectively, and they are separated into systems forming binary BHs that would merge in less or more than a Hubble time. Systems marked as “CE merger” merge during the CE phase.