Reversi

Program playing Reversi (also known as Othello) game as a White player.

Input

• coordinates of board tile of form (a-h)(1-8)
• = which means giving up the move

Output

• evaluation of board:
  • ? if input move was illegal
  • or = if White player gave up move
  • or White move and Black move

followed by difference of black and white pawns

• board printed