Shredder (on iOS and Android, at least) has the capacity to tailor it's playing strength based on your success with it. It tries to match your own playing stren

Shredder (on iOS and Android, at least) has the capacity to tailor it's playing strength based on your success with it. It tries to match your own playing strength to give you a more interesting game. As you win it gets stronger, as you lose it plays weaker.