Draw also labels
Center contents of #main.container
Assign the id to #current-player
Rename #result as #message
Refine how to resetUI
Show a message about user's move
Add a margin between the board and the console
Add a header for each region
Order members about UI
Define scoreBoard
Define ratePosition
Define calculateRatings
findTheBestMoveByAI based on rating
Shorten the delay to chooseMoveByAI
Define limitGameTreeDepth
Define AI_LEVEL
limitGameTreeDepth to findTheBestMoveByAI
Define memoize
Memoize listVulnerableCells
Record hit count in a memoized function