New constructions for the $n$-queens problem

Martin Bača, Susana-Clara López, Francesc-Antoni Muntaner-Batle +1

Let $D$ be a digraph, possibly with loops. A queen labeling of $D$ is a bijective function $l:V(G)⟶\{1,2,\dots ,|V(G)|\}$ such that, for every pair of arcs in $E(D)$…