The enemy does indeed use logic when making moves, it just isn't very smart. The cost method that i used for its ai can defenetly have room for improvement.
I have had many opinions about the time needed to complete the game. It is a big difference between players with varying chess skills. In the future I would probably add a way to select diffulty levels and therefore I could decrease the time for more experienced players and increase the time for beginners.
Thank you for your supportive critique!