Maxim Dlugy was born in Moscow. He emigrated with his family to New York in 1977. He became a master in 1980, an International Master in 1982, and a Grandmaster in 1986. In 1984, he tied for 3rd at the U.S. chess championship. In April 1985, at the age of 19, he advanced to the interzonals (he played in the Tunis Interzonal), the youngest U.S. player since Robert James Fischer. He tied for 6th-8th place (won by Artur Yusupov). In 1985, he won the World Junior Chess Championship. In 1985, he took 2nd in the New York Open. In 1986 he played second reserve board on the U.S. Olympiad chess team in Dubai. In 1987, he won the National Open in Las Vegas. In 1987 he tied for 3rd in the U.S. Championship. In 1988, he won the $32,000 Samford Chess Fellowship. In 1988, he won the World Open in Philadelphia ($25,000). In 1988 and 1990, he won the US Open blitz championship. From 1988 to 1993, Dlugy was ranked number 1 in the world in the World Blitz Chess Association. In 1989, he tied for 1st at the American Open. He won the state of New Jersey championship in 1989.
He was President of the USCF from 1990 to 1993, the first Grandmaster to hold that position. In 1991, he won the 2nd Harvard Cup man-machine tournament. In 1992, he was the 3rd highest rated player in the USA, behind Gata Kamsky and Gregory Kaidanov.
In the 1990s he worked for Bankers Trust on Wall Street as a securities trader. In 2002, he was the investment manager to Russian Growth Fund (based in the Virgin Islands), which invested in a magnesium plant in Solikamsk (Russia's second biggest magnesium plant; the USA buys 60% of its production). Garry Kasparov also served as a senior advisor at the Russian Growth Fund. From June 2003 to August 2003 he was the plant's chairman of the board.
In April 2005 Dlugy was arrested at Sheremetyevo airport in Moscow on fraud charges related to the Russian Growth Fund involving ten million dollars, and imprisoned in Russia. On December 20, 2005, he was acquitted of all charges.
Upon his release, Dlugy returned to the United States and resumed competitive chess. He played in the 2006 US championship, earning a plus score; he also became a member of chessgames.com (User: Maxim Dlugy) and posted several times in 2007. In addition, he established a personal website at http://www.dlugy.com/, which includes several of his annotated games at http://www.dlugy.com/games/.
In both 2017 and 2020, Dlugy was suspected of, and later admitted to, cheating in a Titled Tuesday online tournament on chess.com. The incidents received renewed attention after Magnus Carlsen referenced them during the Carlsen–Niemann controversy, as Dlugy has previously served as Niemann's coach. Later, Vice published an article contained emails from Dlugy where he confessed to cheating multiple times on that site; chess.com banned him from all events with cash prizes.
References: (1) http://njscf.org/history/list-of-ne... , (2) Wikipedia article: Maxim Dlugy