gameState: The game state is represented by a list of 8 values.
In rt3: Tic-Tac-Toe Package for R

board: The boards state represented by a list. It contains a list of X's, O's and EMPTY's. It's initially filled by EMPTY's.
currentPlayer: The player who needs to make the next move. This either X or O.
startingPlayer: the player who was the first player to move in this game state. This either X or O.
moves: The list of moves made by players to get to this game state. This initially filled with 0's.
movesP: The player turn list. It contains a list of alternating X's and O's
numMoves: Number of moves made to get to this game state.
isDone: This indicates wheter this is a final game state. It is final if either X or O has won if there is no winner: NONE.
winner: If there is a winner in this games state the value is either X or O. If the game state is a draw or the game is not finished the value is NONE.