# US 10,769,883 B2 · Method of operating a stack symbols progressive game system, a gaming system and a game controller > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,769,883 B2 - Document ID: US10769883B2 - Status: Granted - Kind: B2 - Application number: 16/446,290 - Filed: 2019-06-19 - Published: 2019-10-03 - Granted: 2020-09-08 - Earliest claimed: 2015-09-25 - Assignees: Aristocrat Technologies Australia Pty Limited - Applicants: Aristocrat Technologies Australia Pty Limited - Inventors: T. Grant Bolling, Jr.; Kurt Larsen - Web page: https://patentgrep.com/patent/US10769883B2 ## CPC - G07F 17/3213: {Details of moving display elements, e.g. spinning reels, tumbling members} - G07F 17/3209: {Input means, e.g. buttons, touch screen} - G07F 17/3225: {Data transfer within a gaming system, e.g. data sent between gaming machines and users} - G07F 17/3244: {Payment aspects of a gaming system, e.g. payment schemes, setting payout ratio, bonus or consolation prizes} - G07F 17/3246: {involving coins and/or banknotes} - G07F 17/3251: {involving media of variable value, e.g. programmable cards, programmable tokens} - G07F 17/3258: {Cumulative reward schemes, e.g. jackpots} - G07F 17/326: {Game play aspects of gaming systems} - G07F 17/3267: {Game outcomes which determine the course of the subsequent game, e.g. double or quits, free games, higher payouts, different new games} - G07F 17/34: depending on the stopping of moving members {in a mechanical slot machine}, e.g. "fruit" machines - G07F: COIN-FREED OR LIKE APPARATUS (coin sorting G07D3/00; coin testing G07D5/00; {handling coins or paper currencies apart from payment activated apparatus G07D; payment architectures, schemes or protocols G06Q20/00}) ## Abstract An electronic method of operating a gaming system includes a game controller. The method includes forming, using the game controller, at least one dynamically generated reel strip by a) conducting a random determination to select one of a plurality of different arrangements of a defined number of stacked symbols, each arrangement dividing the defined number of stacked symbols into a different number of stacks of the symbol, and b) adding the selected arrangement to symbols predefined for the respective reel strip; selecting symbols, using the game controller, from a set of reel strips including the at least one dynamically generated reel strip; displaying the selected symbols on the display; and making, using the game controller, an award if the selected symbols include one or more winning outcomes. ## Claims ### Claim 1 An electronic gaming system comprising: a credit input operable to establish a credit balance; a player interface comprising a game play area arranged in a plurality of columns, each of the columns having a plurality of display positions; and a game controller comprising a processor and a memory storing a) a plurality of reel strips, each of the plurality of reel strips having a plurality of predefined symbols, b) a plurality of stack symbols, c) a plurality of stack arrangements, each of the plurality of stack arrangements defining a number of stacks in the plurality of reel strips, and d) instructions, which, when executed cause the game controller to at least: select a height of the game play area from a plurality of different heights of display positions, select game symbols for display within the height of the game play area from the plurality of reel strips, the plurality of reel strips comprising the plurality of predefined symbols and at least one stack symbol of the stack symbols, display the game symbols selected in the game play area on the player interface, determine whether a progressive trigger occurs based on the game symbols selected for display and the height of the game play area, and initiate a progressive game in response to determining that the progressive trigger has occurred. ### Claim 2 (depends on 1) The electronic gaming system of claim 1, wherein the instructions, when executed, further cause the game controller to randomly select a first stack symbol from the plurality of stack symbols for the at least one stack symbol of the stack symbols in a first reel strip. ### Claim 3 (depends on 1) The electronic gaming system of claim 1, wherein one or more of the plurality of different heights of display positions is associated with a different award. ### Claim 4 (depends on 1) The electronic gaming system of claim 1, wherein each real strip of the plurality of reel strips comprises at least one stack of symbols having the same length in the display positions as a highest height of the game play area. ### Claim 5 (depends on 1) The electronic gaming system of claim 1, wherein the instructions, when executed, further cause the game controller to select the game symbols based on at least one stack arrangement from the plurality of stack arrangements. ### Claim 6 (depends on 1) The electronic gaming system of claim 1, wherein the progressive trigger comprises the height of the game play area occupied by a predetermined number of the plurality of reel strips having been completely filled with the at least one stack symbol of the stack symbols. ### Claim 7 (depends on 1) The electronic gaming system of claim 1, wherein the instructions to select a number of display positions in the game play area, when executed, further cause the game controller to select the height based on a weighted table defining different combinations of stack arrangements of the game play area. ### Claim 8 A method of conducting a game on an electronic gaming machine that includes a credit input, a player interface providing a game play area with a plurality of display positions, and a game controller comprising a random number generator, a processor and a memory storing a) a plurality of reel strips, each of the plurality of reel strips having a plurality of predefined symbols, b) a plurality of stack symbols, c) a plurality of stack arrangements, each of the plurality of stack arrangements defining a number of stacks in the plurality of reel strips, and d) instructions, which, when executed cause the game controller to initiate the game, the method comprising: activating, by the game controller, on the player interface a number of display positions that define a height of the game play area from a plurality of different heights of display positions; receiving, by the player interface, a gaming input; in response to the gaming input, generating, by the random number generator, game symbols for display in the game play area, from the plurality of reel strips, the plurality of reel strips comprising the plurality of predefined symbols and at least one stack symbol of the stack symbols; determining, by the game controller, whether a progressive trigger occurs based on the game symbols selected for display and the height of the game play area; and initiating, by the game controller, a progressive game in response to determining that the progressive trigger has occurred. ### Claim 9 (depends on 8) The method of claim 8, further comprising randomly selecting a first stack symbol from the plurality of stack symbols for the at least one stack symbol of the stack symbols in first reel strip. ### Claim 10 (depends on 8) The method of claim 8, further comprising inserting one of the stack arrangements corresponding to the at least one stack symbol of the stack symbols into one of plurality of reel strips. ### Claim 11 (depends on 8) The method of claim 8, wherein the progressive trigger comprises a predetermined number of the plurality of reel strips having been completely filled with the at least one stack symbol of the stack symbols in the game play area. ### Claim 12 (depends on 8) The method of claim 8, wherein each real strip of the plurality of reel strips comprises at least one stack of symbols having the same length in the display positions as a highest height of the game play area. ### Claim 13 (depends on 8) The method of claim 8, further comprising selecting the game symbols based on at least one stack arrangement from the plurality of stack arrangements. ### Claim 14 A non-transitory computer-readable medium for conducting a game on an electronic gaming machine that includes a credit input, a display providing a game play area arranged in columns of display positions, and a game controller comprising a processor and a memory storing a) a plurality of reel strips, each of the plurality of reel strips having a plurality of predefined symbols, b) a plurality of game heights and a plurality of corresponding lengths of stack symbols, and c) instructions, which, when executed cause the processor to perform at least the steps of: selecting a first game height of the plurality of game heights thereby indicating a first length of the plurality of corresponding lengths of stack symbols; selecting, by the game controller, symbols for display within the first game height in the game play area from the plurality of reel strips having the plurality of predefined symbols and a plurality of stack symbols defined by the first length; determining, by the game controller, if a defined number of columns of display positions are filled with the plurality of stack symbols; and initiating, by the game controller, a progressive feature in response to determining that the defined number of columns of display positions are filled with the plurality of stack symbols. ### Claim 15 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the instructions, when executed, further cause the processor to perform the step of randomly selecting a first stack symbol in first reel strip. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein randomly selection the first stack symbol is a first selection, and wherein the instructions, when executed, further causes the processor to perform the step of randomly selecting a second stack symbol for a second reel strip independently of the first selection. ### Claim 17 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the instructions, when executed, further cause the processor to perform the step of inserting the plurality of stack symbols defined by the first length into one of the plurality of reel strips. ### Claim 18 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the first length for a first reel strip is different from a second length for a second reel strip. ### Claim 19 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the defined number of columns of display positions is at least three. ### Claim 20 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the step of selecting the first game height further comprising selecting the first game height based on a weighted table defining different combinations of lengths of stacks and heights of the game play area.