Gadget-2 SPH, Cubic spline kernel, eta=1.234

Pressure-Entropy SPH, Cubic spline kernel, eta=1.234

Pressure-Energy SPH, Cubic spline kernel, eta=1.234

ANARCHY-PU SPH, Cubic spline kernel, eta=1.234

GIZMO, Cubic spline kernel, eta=1.235, exact Riemann solver