  In a recent paper Lechner, Hauke and Zoller (LHZ) described a means to
translate a Hamiltonian of $N$ spin-$\frac{1}{2}$ particles with 'all-to-all'
interactions into a larger physical lattice with only on-site energies and
local parity constraints. LHZ used this mapping to propose a novel form of
quantum annealing. Here we provide a stabiliser-based formulation within which
we can describe both this prior approach and a wide variety of variants.
Examples include a triangular array supporting all-to-all connectivity, and
moreover arrangements requiring only $2N$ or $N\log N$ spins but providing
interesting bespoke connectivities. Further examples show that arbitrarily high
order logical terms can be efficiently realised, even in a strictly 2D layout.
Our stabilisers can correspond to either even-parity constraints, as in the LHZ
proposal, or as odd-parity constraints. Considering the latter option applied
to the original LHZ layout, we note it may simplify the physical realisation
since the required ancillas are only spin-$\frac{1}{2}$ systems (i.e. qubits,
rather than qutrits) and moreover the interactions are very simple. We make a
preliminary assessment of the impact of this design choices by simulating small
(few-qubit) systems; we find some indications that the new variant may maintain
a larger minimum energy gap during the annealing process.
