Good pawn design. Other than that, the ads are annoying especially when playing short games in easier difficulties, and more importantly, the opponent AI difficulty gets messed up. Instead of playing at level 2, like i set it up to, it plays way better. And i know this is the case because i play a match at lvl 2, it absolutely destroys me, and then i play another one again at lvl 2, and it's suddenly dumber than rocks