Guest Editors Conclusion

This special issue comprises six papers devoted to SAT solving and three papers devoted to MAXSAT solving. With two exception, the papers contain detailed information about some of the best solvers from the 5th SAT solver competition and from the 2nd MAX-SAT solver competition, which took place as side event of the 10th International Conference on Theory and Applications of Satisfiability Testing SAT 2007, in Lisboa/ Portugal. The paper by Heras, et al. deals with the contributed instances for the MAX-SAT evaluations and the paper by Argelich, et al. reports on the First and Second MAX-SAT evaluations in 2006 and 2007.