Expand description
Hall-of-fame pathology mitigation for competitive co-evolution.
Naive competitive co-evolution suffers from cycling (Ficici 2004): a population evolves a best response to the opponent’s current composition, the opponent shifts in turn, and neither makes lasting progress (the rock-paper-scissors trap). Rosin & Belew (1997) mitigate this with a hall of fame — an archive of past champions that the current population must also perform well against, anchoring the fitness landscape so it can no longer be chased in a circle.
HallOfFame is the archive; HallOfFameFitness is the
CoupledFitness wrapper that blends each individual’s score against the
current opponents with its score against the archived champions. Passing a
HallOfFameFitness to a co-evolutionary algorithm enables the mitigation;
passing the raw fitness disables it — no flag inside the algorithm.
Structs§
- Hall
OfFame - Per-population archive of past champions, capped at a fixed capacity.
- Hall
OfFame Fitness - A
CoupledFitnesswrapper that anchors fitness against a hall of fame.