The basic idea was calculated on a more generic level by this post on Advantage Slots. As such, a more generic format might be advisable. These may still be accurate for some games, but six years has passed since that article, and there’s always the chance not every game is identical. An EV Formula for Bet-Based Must Hit By Machines The precise nature of those calculations may be helpful for those who are trying to get past the math and to whether you should look at a machine or not. Michael “Wizard of Odds” Shackleford took a look at the games a few years ago, and shared some data based on his experiences with a series of games. The same can’t be said for Ainsworth’s progressives, which are designed with a Must Hit By model that is based on coin-in.

That can make it a bit more difficult to know what your expected value on a play will be and how much you’ll need to invest. In a previous post I spoke about the WMS G+ Deluxe progressives, and how they increment based on wins.