lib/tictactoe/strategy.rb
require 'tictactoe/strategy/tactics'
require 'tictactoe/strategy/win_now'
require 'tictactoe/strategy/block_win'
require 'tictactoe/strategy/fork'
require 'tictactoe/strategy/block_fork'
require 'tictactoe/strategy/first_move'
require 'tictactoe/strategy/second_move'
require 'tictactoe/strategy/opposite_corner'
require 'tictactoe/strategy/empty_corner'
require 'tictactoe/strategy/empty_side'