Ising Spinglass instances generated by Frauke Liers (2004).

• ising2.5-n_seed: For each dimension three one-dimensional Ising chain instances. n=100,150,200,250,300.
• ising3.0-n_seed: For each dimension three one-dimensional Ising chain instances. n=100,150,200,250,300.
• t2gn_seed: For each dimension three two-dimensional toroidal grid graphs with gaussian distributed weights and dimension n times n, n=10,15,20.
• t3gn_seed: For each dimension three three-dimensional toroidal grid graphs with gaussian distributed weights and dimension n times n times n, n=5,6,7.

These instances are also part of the Biq Mac Library (2007).
Attention: As opposed to other representations of some of these instances, ours do not contain zero-weight edges or coeffcients in accordance with our format specifications.
Download links: .mc version, .bq version