Optical groups and clusters identified with redMaPPer within and around the Shapley (left) and Horologium-Reticulum (right) superclusters. The colours represent the velocity with respect to the mean supercluster redshift (titles). The sizes are equal to r₂₀₀ determined through the redMaPPer richness. The coloured circles with black outlines are primary clusters (only shown within the supercluster regions), and circles without the black outline are secondary clusters or clusters outside the CHANCES supercluster survey areas, which are marked with green polygons. For primary clusters, we also show 5r₂₀₀ with a black circle. The blue crosses and circles mark clusters Abell 3571 (left) and Abell 3266 (right), which are at the supercluster redshifts, but are targeted individually as CHANCES main clusters. We also mark the most massive redMaPPer systems associated with Abell clusters with black crosses (not all of them are primaries).