As already highlighted in Table , benzamide in F 2dd is a case where the 10,000-minimization QR search has missed one low energy structure that is located by all three QR-BH runs with the same number of minimizations. This missed structure is the second lowest-energy structure for this system, only 0.04 kJ mol -1 above the global minimum. In extending the QR search, we find that this structure is first hit after minimization of 30,381 structures. Thus, the greater sampling efficiency of QR-BH is important in this case for obtaining a complete picture of the potential crystal structures. Figure shows the number of times that each of the 10 lowest energy structures were located in this system, highlighting the second lowest energy structure as a difficult case. The results show the increased sampling efficiency of QR-BH not only for the global minimum (as shown in Tables and), but also for the next two structures. As the energy increases, the difference between QR and QR-BH is less obvious, which matches our expectation that basin hopping helps locate the lowest energy structures and also demonstrates that sampling of the rest of the low energy region is not worsened compared to pure QR sampling.