Thanks for the stats, Jeff! I was going to suggest eliminating any map with a draw rate of 10% or above; I had no idea the draw problem was so bad. Still, the relative numbers seem like a great guide for getting the worst offenders out. Also, it seems you could test new symmetrical boards and quite quickly get an idea of whether to keep them or throw them away.
Thanks again for evolving the contest to be better and better so as to keep up with the bots that are evolving to be better and better!