Six crystal systems (Fig. ), including single-component crystals and co-crystals, were chosen as representative of different applications of CSP, and of systems held together by different strengths of intermolecular interactions. Tetracyanoethylene is a planar molecule with weak intermolecular interactions, the zwitterionic geometry of glycine leads to strong intermolecular hydrogen bonding interactions, while benzamide represents molecules with medium strength intermolecular interaction. The fourth single-component system, a triptycene trisbenzimidazolone (TTBI) (Fig. ), is a larger molecule that has been shown to form several porous polymorphs located in low-density, high-energy regions of the lattice energy landscape; this molecule is included to test the location of important high-energy structures by the QR-BH crystal structure searching algorithm.