TaskModelBranch Gecode::ValBranch Gecode::VarBranch Tie-breaking for variable selection Branch with a function double(* typedef double(* Gecode::BranchTbl)(const Space &home, double w, double b) )(const Space &home, double w, double b) BranchTbl Tie-break limit function. Here the value w is the worst and is the best merit value found. The function must return the merit value that is considered the limit for breaking ties. Support for randomization and tie-breaking that are independent of a particular variable domain.