Understanding Their Role in the Gambling World: A Comprehensive Guide to Slots Gurus Since the invention of slot machines in the late 19th century, the idea of a "slots guru" has undergone significant change. These machinesbigboost free slots were initially straightforward mechanical devices, sometimes known as "one-armed bandits," that gave players the opportunity to win modest prizes by relying on chance and luck. Interest in comprehending these machines' workings and winning strategies increased along with their popularity. The phrase "slots guru" first appeared in the latter half of the 20th century as players looked for people who could explain the nuances of slot machines.