Patent ID: 9218719
Filing Date: 2015-12-22
Classification: G07F

Abstract:
1. An electronic wagering slot machine comprising: a display for displaying a game, wherein said game comprises game symbols arranged into an array of game positions arranged in rows and columns and where predetermined winning combinations of randomly selected game symbols in said game award prizes to a player, vending slots for receiving monetary bets, and an electronic game controller adapted to determine if a bet has been received using the vending slots to initiate play of said game and to control the display of game symbols on the display if the bet has been received, wherein the appearance of a first special symbol in a predetermined game position of a first column on said display causes said electronic game controller to select a group of game positions, said group comprising all game positions in the columns to one side of said first column, and wherein each game symbol occupying a game position in said group is changed into a second special symbol either during a play of said game or at the completion of said play, said change into said second special symbol being visible to said player.