Mark Izrailovich Dvoretsky was born on December 9, 1947, and died on September 26, 2016.
He was a Russian chess trainer, writer and International Master.
He was awarded the International Master title in 1975 and for a time, was widely regarded as the strongest IM in the world.
Which was due to a number of excellent results; he was Moscow Champion in 1973, finished equal fifth in a strong Soviet Championship in 1974 and won the Wijk aan Zee Masters tournament of 1975 by a clear point and a half.
One of his creditable finish at the USSR Championship of 1975, the results were an indication that he was already of grandmaster strength.
Mark Dvoretsky passed away at 68 years old.