Figure 1 : A region of a Chimera graph containing 3 × 2 unit cells.

From: A Direct Mapping of Max k-SAT and High Order Parity Checks to a Chimera Graph

Figure 1

Each vertex corresponds to a spin variable. One can adjust the magnetic fields hi at each spin as well as the pair-wise couplings Jij between spins which are adjacent to each other in the graph.