Sergey Janovsky (born 20 May 1952, Moscow) is a Russian chess coach and International Grandmaster (GM) awarded by Fédération Internationale des Échecs (FIDE) in 2001.
Janovsky's early career as a player witnessed several tournament victories. In 2002, he won the Moscow championship ahead of notable contemporaries. In 2003, he ranked 2nd at the Vladivostok Open, and experienced further success in two Russian team championships and three European club cups, playing for Tomsk-400 and ShSM-64 teams.
His coaching career includes ahead of trainer for team Moscow (1997–2004), Sports school № 9, Moscow (from 2005), and currently running a chess school in Zhukovsky, Moscow Region. He has contributed to the wins of many acclaimed players.
Janovsky has published more than 100 chess-related articles in notable publications and was the Director of the Russian chess magazine, 64, in 1990–1993. He is known for his specialties in the Sicilian Defence, particularly the Scheveningen variation, and the Nimzo-Indian Defence.
He earned an engineering degree from the Moscow Aviation Institute in 1975, and he is the author of several engineering/science books. His contributions to both chess and engineering have made him a well-respected figure in his field.