  We show that a junction of three off-critical quantum Ising chains can be
regarded as a quantum spin chain realization of the two-channel spin-1/2
overscreened Kondo effect with two superconducting leads. We prove that, as
long as the Kondo temperature is larger than the superconducting gap, the
equivalent Kondo model flows towards the 2 channel Kondo fixed point. We argue
that our system provides the first controlled realization of 2 channel Kondo
effect with superconducting leads. This, besides its the theoretical interest,
is of importance for potential applications to a number of context, including
the analysis of the quantum entanglement properties of a Kondo system.
