The "King of Slots" tournament at the casinoLeonbets is supported by the well-known gaming software manufacturer Microgaming. The competition runs from December 30, 2019 to May 4, 2020 and is divided into weekly stages, each of which runs from 03:00 Moscow time on Monday until 02:59 on the following Monday.

At each stage, participants compete for a prize pool of 160,000 rubles and 400 free spins. Prizes are distributed as follows:

The leaderboard is available on the tournament page. It is updated every knock from Tuesday to Friday. Points scored on Saturday and Sunday are taken into account in the final calculation of results on Monday. To participate in the competition, you need to make at least one bet with a face value of 100 rubles or more (or the equivalent in another currency) in slot machines located in the slots section of the Microgaming provider. For every 100 rubles wagered, the player receives 1 point. The participant with the maximum number of points wins. If two players at the end of the competition scored the same number of points, then the one who did it first takes the higher line in the final table.

Cash prizes are available for withdrawal immediately without wagering. Free spins must be used within 7 days of being credited. They are available on the following slots: A Dark Matter, ActionOps Snow and Sable, Agent Jane Blonde Returns, Banana Odyssey, Book of Oz, Book of Oz Lock 'N Spin, Bookie of Odds, Boom Pirates, Deco Diamonds, Deco Deco Deluxe, Fortunium, Lucky Links, Rockabilly Wolves.