There was less gain for residues that were either less or more accurate. Residues already correct in the initial model had less room for improvement so that almost any change would decrease accuracy. On the other hand, residues deviating too much were too far from their correct positions for stochastic sampling via MD to find the correct structure, especially in the presence of restraints. . Statistical analysis for each bin is shown as a boxplot for refinement with "CASP14" sampling protocol (blue), "CASP13-simple" (green), and "CASP12-simple" (red).