Hi, The branch_and_bound library offers the control you need. Specifically you could use: bb_min(labeling(List),Expr,bb_options with delta:N) to ensure that having found a solution with cost Cost, further search will only look for solution with cost better than Cost-N. Cheers Mark _______________________________________________________________ Dr. Mark Wallace, IC-Parc, Phone +44 (0)20 7594 8434 William Penney Laboratory, Fax +44 (0)20 7594 8432 Imperial College, London SW7 2AZ, UK. Email: mgw@icparc.ic.ac.ukReceived on Fri Aug 02 14:55:07 2002
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