Distribution of the various classification scores of the RR Lyrae subtypes. Left panels: Gaia DR2 classification type; right panels:as classified based on the K2 data. The distribution is skewed towards score values of 1.0 for RRab stars but is flat for RRc and RRd stars. Light green, orange, and pale violet mark bona fide RRab, RRc, RRd stars, respectively. Dark green, brown, and dark lilac denote stars that we classified into a different subclass (which are distributed in different panels on the right-hand side). White bars refer to the counts of stars for which the RR Lyrae variability was not confirmed or was rejected.