Interaction Energy: Monitors that all PHE, TYR, and TRP residues are scoring well.
SS Design: Prohibits all CYS residues. Prohibits GLY, ALA residues in sheets. Prohibits GLY, ALA, SER, THR in helices.
Residue Count: Normalizes for extra residues inserted beyond the starting 65, at a cost of 32 points per residue. Players may use up to 75 residues in total.