before_refactoring.rb

def minimax_score(board, player, cell, depth)
    board.add_marker(cell, player.marker)
    if board.game_over?
      best_score = get_score(board, player)
    elsif player.turn == 1
      best_score = 999
      board.get_free_positions.each_key do |cell1|
        board.add_marker(cell1, player.opponent.marker)
        score = minimax_score(board, player.opponent, cell1, depth += 1)
        score = (score/depth.to_f)
        if score < best_score
          best_score = score
        end
        board.remove_marker(cell1)
      end
    else ### There is repetition between this and the previous branches.
      best_score = -999
      board.get_free_positions.each_key do |cell2|
        board.add_marker(cell2, player.opponent.marker)
        score = minimax_score(board, player.opponent, cell2, depth += 1)
        score = (score/depth.to_f)
        if score > best_score
          best_score = score
        end
        board.remove_marker(cell2)
      end
    end
    board.remove_marker(cell)
    return best_score
  end