First observations of ψ(2S) and χcJ(1P) decays to four-body final states h+h−KS0KS0

First observations of χc0, χc1, and χc2 decays to π+π−KS0KS0 and K+K−KS0KS0, as well as ψ(2S) decay to π+π−KS0KS0, are presented. The branching fractions of these decay channels are determined using 14×106ψ(2S) events collected at BESII/BEPC. The branching fractions of χc0,χc2→KS0KS0 are measured with improved statistical precision.