Planetary core water-ice mass fraction. Left: core water mass fraction of a planet as a function of its starting location. The architecture of the system to which a planet belongs to is shown by marker characteristics. The vertical shaded regions shows the location of the ice line. Middle: water mass fraction architecture seen through the coefficient of similarity versus the coefficient of variation plot. The shape of the marker shows a system’s mass architecture, and the colour depicts its Aryabhata’s number (see Paper II for definition). Right: distribution of ƒ_ice across architecture classes. Depending on ƒ_ice, planets are labelled as ‘dry’, ‘moist’, or ‘wet’.