Siegbert Tarrasch ( Breslau , now WrocÅ aw , 5 March 1862 -- Munich , 17 February 1934 ) was a doctor , and one of the strongest chess grandmasters of the day . Siegbert Tarrasch ( March 5 , 1862 -- February 17 , 1934 ) was one of the strongest chess players and most influential chess teachers of the late 19th century and early 20th century .