I finally got my first chess legend to lvl 5 and maxed on logic, bshag is right, practice makes perfect. I did find out something though, my sim was maxed out in logic, lvl 4 in rank. When I called to invite the next rank chess player, it was someone in her household, the sim only had 5 skill points to the other sims 10, so not quite sure how that works, guess it might be a ratio thing, but the one with 5 points didn't even play chess that much, funny how this game works.