ABSTRACT
In tournament selection a group of q individuals is randomly chosen from the population. They may be drawn from the population with or without replacement. This group takes part in a tournament ; that is, a winning individual is determined depending on its fitness value. The best individual having the highest fitness value is usually chosen deterministically though occasionally a stochastic selection may be made. In both cases only the winner is inserted into the next population and the process is repeated λ times to obtain a new population. Often, tournaments are held between two individuals (binary tournament). However, this can be generalized to an arbitrary group size q called tournament size.
