Expected evolutionary outcome for the primary star, or merger product, for each model in the binary grid with M_1, i = 12.6 M_⊙ shown in the log P_i − q_i diagram. The explodability criterion used is that of M16 and the mergers are given by the hard-coded criteria. Models that undergo unstable RLOF are shown with hatches, and we differentiate between the case in which the donor is the primary star (black) or the secondary star (white). Different colors represent different evolutionary outcomes (see legend). The lines in the plots separate Case A and Case B systems (dashed), Case B and Case C systems (dotted), and systems that undergo RLOF and those that do not (solid).