Grand Master (1997)
Nisipeanu is the son of a Romanian father and a German mother. He began his chess career already as a teenager in the early 1990s. In 1996 he won a grandmaster tournament in Balatonberény. In the same year he became Romanian national champion and member of the Romanian Olympic Team for the first time. In 1997, he won a strong tournament in Bucharest, the year after he won the zone tournament in Krynica and qualified for the FIDE World Championship in Las Vegas in 1999, when he sensationally came up in the semifinals. He was defeated by eventual champion Alexander Khalifman after a 2-2 draw in the regular tournament games only in the rapid chess playoff.
In 2002 he won the championship again in Romania. In 2003, he won tournaments in Valle d' Aosta, Santo Domingo (1st - 3rd ), Andorra and the Neckar Open in Deizisau. In 2004 he won in Valle d' Aosta and Pune. Nisipeanu played in the late 1990s in the German Chess Bundesliga for the USC Magdeburg. In the 2004/05 season he scored on 1 board of the Berlin club SC Kreuzberg 8 points from 13 games, starting from the 2007/ 08 season he played for the OSG Baden -Baden. His chess club in Romania is the A.C.S.S. Apa Nova Bucharest. Nisipeanu is currently with an Elo of 2686 to the second place in the German ranking list (April 2013), prior to joining the German Chess Federation, he led the Romanian rankings. His previous highest Elo rating was 2707 (October 2005).
Nisipeanu plays a richly inventive, creative and entertaining chess, reminiscent of the former world champion Mikhail Tal.
In his Black repertoire can be found at the highest level rarely played chess openings like the Philidor Defence; He is also considered one of the experts present the hedgehog positions especially the English Opening.
2005 European Championships in Warsaw
Nisipeanu was on 1 July 2005 European Champion Men in Warsaw.
Nisipeanu won the European title with 10 points from 13 rounds with half a point ahead of the Azerbaijani young talent Teymur Rəcəbov. In the last round he defeated the remaining tie Slovenes Alexander Beliavsky, who dropped by the defeat at Rank 6. Nisipeanu secured with this victory next to the title a bonus of 20,000 euros.