@cmplxty you came up with the good suggestion, its an elegant and rather simple way to differentiate a bot from a human. If they think about it, while they want the bots playing to keep the matches readily available, the skill of winning in the season challenge should be relegated to humans (or at least based on a bot that plays as much as the humans would play). So kudos to you for the idea, I haven't seen it anywhere before, but I like the idea (and it should be easy to implement if they agree with the solution).