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Hace 1 día · Arpad Elo, the inventor of the Elo rating system. The Elo rating system is a method for calculating the relative skill levels of players in zero-sum games such as chess.It is named after its creator Arpad Elo, a Hungarian-American physics professor.. The Elo system was invented as an improved chess-rating system over the previously used Harkness system, but is also used as a rating system in ...
Hace 1 día · Rock is a broad genre of popular music that originated as "rock and roll" in the United States in the late 1940s and early 1950s, developing into a range of different styles from the mid-1960s, particularly in the United States and the United Kingdom. It has its roots in 1940s and 1950s rock and roll, a style that drew directly from the blues and rhythm and blues genres of African-American ...
