IlcSolverDebugger debugger(solver); 

solver.extract(model); 

while (debugger.initialize()) { 

solver.solve(IloGenerate(env, knightArr) 

              && IloStoreSolution(env, sol)); 

do { 

  while (--iter >= 0 

         && debugger.newSearchTreeView() && solver.solve(move)) {

    moves++; 

    if (sol.getObjectiveValue() < best.getObjectiveValue()) { 

      ostrstream txt; 

      txt << "Move " << moves 

      << ", Knights = " << sol.getObjectiveValue() << endl<< ends;

      debugger.sendSolution(txt.str()); 

      best.copy(sol); 

    } 

  } 

 } while (iter > 0 && !tabu.complete()); 

    debugger.sendConsole("Restoring solution...\n"); 

    debugger.newSearchTreeView(); 

    solver.solve(IloRestoreSolution(env, best)); 

}