Some examples are directed to determining a frequency of occurrence of a first value in a component of a first plurality of candidate solutions for an optimization problem where the first plurality of candidate solutions has converged on a sub-optimal solution during a computer simulation that tests fitness of the first plurality of candidate solutions. Some examples are further directed to determining a second value that is inversely biased from the frequency of occurrence of the first value. Some examples are further directed to including the second value in a component of at least a portion of a second plurality of candidate solutions, where the component of the at least the portion of the second plurality of candidate solutions corresponds to the component of the first plurality of candidate solutions.