intricate

intricate    [In-tri-kit]

adjective.   very complicated, with many interrelated parts

"In just four days, the avian flu has killed about 26 million chickens and turkeys in the United States.  Poultry raising is an intricate economy of many moving parts.  The potential losses include not only individual farm businesses but also the businesses they use, from feed dealers to equipment sales and service to slaughterhouse and packing works to the cafe in the local town."
"Anthony Doerr's 'All the Light We cannot See," an emotional and intimate World War II novel has won the Pulitzer Prize for fiction. Pulitzer judges cited Doerr's 'imaginative and intricate novel,' which alternates brief chapters between a blind French girl and a young Nazi soldier."
"Chess is a very intricate game, while, a game like Connect Four is not very intricate."

http://www.vocabulary.com/dictionary/intricate