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Slot machine games have evolved beyond all recognition since the early days of simple spinning reels. Nowadays a variety of set-piece routines e.g. Hi-Lo gambles, free spins, trails… can be combined in a seemingly endless succession of attractive designs - each with their own distinctive probabilistic characteristics. What contemporary gamblers may fail to realise is that OR offers a range of solution procedures that can help them directly raise their performance — as we now outline for a number of popular gaming scenarios.
Oses et al. (Sat,) studied this question.