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We revisit the current LHC constraints on the electroweak-ino sectorparameters in the minimal supersymmetric standard model (MSSM) that arerelevant to explaining the $(g-2)_\mu$ anomaly via the dominant chargino andmuon sneutrino loop. Since the LHC bounds on electroweak-inos become weaker ifthey decay via an intermediate stau or a tau sneutrino instead of the first twogeneration sleptons, we perform a detailed analysis of the scenario with a binoas the lightest supersymmetric particle (LSP) and a light stau as thenext-to-lightest one (NLSP). Even in this scenario, the chargino sectorparameters in the MSSM that can account for the $(g-2)_\mu$ anomaly within $1\sigma$ are already found to be significantly constrained by the 8 TeV LHC andthe available subset of the 13 TeV LHC limits. We also estimate the current LHCexclusions in the left-smuon (and/or left-selectron) NLSP scenario frommultilepton searches, and further combine the constraints from the multi-tauand multi-lepton channels for a mass spectrum in which all three generations ofsleptons are lighter than the chargino. In the latter two cases, small cornersof the $1 \sigma$ favoured region for $(g-2)_\mu$ are still allowed at present.

Closing in on the chargino contribution to the muon g-2 in the MSSM: current LHC constraints