As Fig. 2, but for initial primary masses of 15.85 M_⊙ (top left), 17.78 M_⊙ (top right), 19.95 M_⊙ (bottom left), and 39.81 M_⊙ (bottom right). The colour-coding indicates fates as in Fig. 2 (purple: L2-overflow, yellow: inverse mass transfer, green: mass-loss limit violation, and red: common-envelope evolution; all assumed to lead to a merger). Black hatching marks contact evolution, and the dark blue systems evolve to the OB+BH stage. Here, light blue marks systems where the mass donor is assumed to form a NS rather than a BH. The white line separates Case A and Case B evolution, and the area framed by the black line in the lower right corner marks the part of the parameter space that is disregarded in our results (see Sect. 2).