Country           Latvia (until 2005)
                      Germany (2005–2015)
                      Azerbaijan (since 2015)
Born               25 October 1985 (age 30)
                      Riga, Latvian SSR, Soviet Union
Title                Grandmaster
FIDE rating       2696 (January 2016)
                      (No. 45 in the FIDE World Rankings)
Peak rating      2737 (December 2013)


Arkadij Naiditsch (born 25 October 1985 in Riga) is a German and Azerbaijani chess player who was awarded the title ofgrandmaster in April 2001. In 1995 he won the European under-10 championship in Verdun.

Naiditsch was the clear winner of the Dortmund Sparkassen 2005 Tournament, ahead of higher-rated and well-known players such as Loek van Wely, Veselin Topalov, Peter Svidler, Vladimir Kramnik, Michael Adams, and Peter Leko. In 2007, he won the German national championship based in Bad Königshofen.

In 2011 he won the 15th International Neckar Open with a score of 8½/9. This achievement enabled him to cross the 2700 Elo ratingmark.In the same year Naiditsch played on the top board for the German team that won the gold medal at the European Team Chess Championship in Porto Carras.

Naiditsch won the Grandmaster Group B of the Tata Steel Chess Tournament 2013 in Wijk aan Zee on tiebreak over Richard Rapport after both finished on 9/13.This victory qualified him for the Tata Steel Group A of 2014 (later renamed 'Tata Steel Masters'). In August 2014 he won with the black pieces against World Champion Magnus Carlsen, playing first board for the German team in the 41st Chess Olympiad in Tromsø. The following month Naiditsch won the 2nd Grenke Chess Classic tournament in Baden-Baden. In December of the same year, he finished first in the 38th Zurich Christmas Open.