Connect 4 AI using minimax algorithm and alpha beta pruning.
Set appropriate difficulty level before playing
- 0 -> Very Easy (AI makes random moves)
- 1 -> Easy (AI aims for immediate win and not losing)
- 2 -> Medium
- 3 -> Hard (AI explores the state tree upto depth of 4)
- 4 -> Insane
- 5 -> Impossible
Note: High values require longer computation time.