Milan Vidmar was a Slovenian electrical engineer, chess player, chess theorist, and writer. He was among the top dozen chess players in the world from 1910 to 1930 and in 1950, was among the inaugural recipients of the title International Grandmaster from FIDE. Vidmar was a specialist in power transformers and transmission of electric current.

Grandmaster (GM) is a title awarded to chess players by the world chess organization FIDE. Apart from World Champion, Grandmaster is the highest title a chess player can attain. Once achieved, the title is held for life, though exceptionally the title can be revoked for cheating.