The global comparative performance of all players can be seen on the distribution
curves (fig. 3.8). Here we have plotted all rated players,
including those with just a few games. The fact that some agents curve have
large RS values indicates that the coevolutionary engine that produces new Tron
players, has managed to produce some players that are good against people. But
at the same time, the wide spread of agent levels, from very bad to very good,
shows us that there is a reality gap between playing against other robots and
playing against humans: all agents that ever played against humans on the website
were selected among the best from an agent-agent coevolutionary experiment that
has been running for a large number of generations: our novelty engine. If being
good against agents was to guarantee that one is also good against people, robots
would not cover a wide range of capacities: they would all be nearly as good
as possible, and so would fall within a narrow range of abilities.
