Classic Reversi description

Reversi is also known as Othello.
The goal of the game is to cover as much of the grid with your color pieces as possible,
by making certain strategic moves.

The players alternately put their pieces on the board.Black is first.
You can put a piece on an empty square to enclose one or more of your opponents pieces between your
pieces and the pieces you want to put down.All the enclosed pieces of your opponent will turn their color
and be yours.

If a player can not make a valid move,then the other player continues to play.

The game is over when it is no longer possible for either player to move.