public DomainRestoreInfo ReduceDomains(Variable var, object value, CSProblem csp)
        {
            DomainRestoreInfo result = new DomainRestoreInfo();
            Domain            domain = csp.GetDomain(var);

            if (domain.Contains(value))
            {
                if (domain.Count() > 1)
                {
                    FIFOQueue <Variable> queue = new FIFOQueue <Variable>();
                    queue.Push(var);
                    result.StoreDomainFor(var, domain);
                    csp.SetDomain(var, new Domain(new object[] { value }));
                    this.ReduceDomains(queue, csp, result);
                }
            }
            else
            {
                result.SetEmptyDomainFound(true);
            }
            return(result.Compactify());
        }