Samuel Reshevsky learned chess when he was 4 years old. He became known as a child chess prodigy and was playing simultaneous games of chess against adults when he was 6 years of age. At age 8 he was playing chess against strong players. In 1920 his family moved to the US and made a living using Sammy’s abilities to play against many chess players simultaneously. Samuel (Sammy) was born November 26, 1911 in Ozorków near Lodz (Poland) and died April 4, 1992 in New York, USA. He became a leading American chess grand master later on and was a contender for the World Championship. But he never played chess on a professional basis when he was grown up, but took time off from chess, studied and graduated 1934 from the University of Chicago holding a degree in accounting.
It seems he was not simply copying the moves of others. By the point of this photo, he had been playing chess for half his life, and had been identified as a prodigy. He began playing simultaneous games at age 6 and became a Grand Master despite never really playing professionally. The man was an accountant.