  Squeezed supersymmetric spectra are challenging for the LHC searches based on
a sizable missing energy and hard visible particles. One such scenario consists
of chargino/second-lightest neutralino NLSPs and a lightest neutralino LSP with
a relatively small mass gap (10-50GeV). In this note, we explore search
strategies to better probe this parameter space. We focus on the three-lepton
plus missing energy channel arising from the chargino/second-lightest
neutralino associated production, and we investigate the role of a relatively
hard initial state radiation (ISR) jet. In addition to typical kinematic
variables, such as the minimum lepton pair invariant mass, we propose an
angular separation variable and two ratio variables which capitalize on the
main kinematic features; leptons stay relatively soft under the boost from ISR
and a sizable missing energy arises only in tight correlation with the ISR
boost. With 300/fb of data at the 14 TeV LHC, we expect to probe
electroweakinos up to 320 (700) GeV with 30GeV mass-gap and up to 220 (620) GeV
with 20GeV mass-gap if gauginos decay via gauge bosons (light sleptons). We
emphasize that the three-lepton channel is technically challenging for mass-gap
below 12GeV.
