private void getNbIrreversiblePiece(int currentPlayer)
	{
		int mine = 0, his = 0;
		for(int i = 0; i < BOARD_SIZE; ++i)
			for(int j = 0; j < BOARD_SIZE; ++j)
				if(board[i][j] != Empty)
				{
					if(board[i][j] == currentPlayer && isIrreversiblePiece(i, j, currentPlayer))
						++mine;
					else if(board[i][j] == -currentPlayer && isIrreversiblePiece(i, j, -currentPlayer))
						++his;
				}
		tempMine = mine;
		tempHis = his;
	}