Tags: Chess Player.
Semen Dvoirys (Russian: Семён Двойрис; born 2 November 1958) is a Russian chess Grandmaster (1990).In 2001 he tied for 1st–2nd with Alexey Korotylev at Geneva Open. In 2010 he won the Izmailov Memorial in Tomsk and tied for 1st–4th with Sergei Yudin Pavel Smirnov and Sergei Iskusnyh at Pavlodar. In 2011 he came first in the Lev Polugaevsky Memorial in Chelyabinsk.