I'd say some of the ones on the ladder are just humans at least as strong as I am, for the sheer fact that I've seen them lose games with mistakes no program would make. These include the maggot, jesse priest, jack kx, and whitey1939 in particular.

Would you like to play me? If you'll give me your IYT name, Purple, I'll issue a challenge to your name when I have one open, even if my ladder rank is above yours. That just doesn't mean much to me.