Fractional branching reel-type slot machine

摘要

A method of implementing desired odds for a reel-type slot machine is disclosed. All of the possible reel stop combinations are assigned to unique terminal nodes in a fractional branching tree stored in a ROM. The tree comprises a main tier, a plurality of lower tiers and a plurality of terminal nodes. Each of the tiers has a number of entries which lead either to a lower tier or to a terminal node. A random number generator is used to select entries on each tier until a terminal node is selected. The reel stop combination assigned to the terminal node is then displayed on the pay line and an award is paid based on a pay table.