SAD phase probability distributions for selected reflections. Here and in subsequent figures the diffraction data are from the quasi-racemic crystal of the snow flea antifreeze protein (Pentelute et al., 2008). The `SAD best centric' phase choice is more often closer to the `true' (model) phase than is the conventional `SAD best' phase. The conventional `SAD best' phase is indicated in cyan and the `SAD best centric' phase is indicated in purple. The `most centric SAD solution' phase is indicated in orange. The model or `true' phase is indicated in dark blue.