AU2013205701A1 - A method of gaming, a gaming system and a game controller - Google Patents

Abstract

Abstract A method of gaming comprising: selecting in each game round a plurality of symbols for display to a player in a 5 set of display positions arranged in a plurality of rows and columns, subsets of the display positions corresponding to respective ones of a plurality of reels, each reel comprising a plurality symbols; controlling the correspondence of display positions to reels so that at 10 least one game round is a diagonal spin game round in which at least one of the reels is arranged to spin diagonally such that it corresponds to display positions in a plurality of neighbouring columns; determining an outcome for each game round based on the selected symbols. 4310501_ 1 (GHMatters) P75995.AU.3 2/05/13 SYMBOL SELECTOR SYMBOL Display INSTRUCTIONS Game Play Mechanism SPIN DIRECTION VERTICAL SPIN GENERATOR CONTROLLER 630 DIAGONAL SPIN , METER DATA CONTROLLER 646 Figure 6 4310501_1 (GHMatters) P75995.AU.3 2/05/13

Description

Title A METHOD OF GAMING, A GAMING SYSTEM AND A GAME CONTROLLER 5 Related Application This application is a divisional application of Australian application no. 2012201400, the disclosure of which is incorporated herein by reference. 10 Field The present invention relates to a method of gaming, a gaming system and a game controller. 15 Background to the Invention Gaming systems are known comprising a game controller arranged to randomly display several symbols from a 20 predetermined set of symbols and to determine a game outcome such as a game win based on the displayed symbols. Such gaming systems may commonly be implemented as a stepper machine provided with reels with each reel carrying several symbols of the set, or a video machine 25 with selected symbols are displayed in virtual reels on a video display. In each case, the reels spin vertically. While such systems provide users with enjoyment, there is a need for alternative gaming systems with different 30 spinning reel features offering unusual new effects. Summary of the Invention According to a first aspect of the invention there is 35 provided a method of gaming comprising: selecting in each game round a plurality of symbols for display to a player in a set of display positions arranged in a plurality of rows and columns, each column of the display positions corresponding to 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 2 respective ones of a plurality of reels, each reel comprising a plurality symbols, wherein symbols in individual columns are only selected from the plurality of symbols from a corresponding reel; 5 controlling the correspondence of display positions to reels so that at least one game round is a diagonal spin game round in which the display positions of at least one column is shifted diagonally such that the display positions in the column occupy positions in 10 neighbouring columns, wherein symbols selected for display in the shifted display positions are selected from the reel corresponding to the at least one column; determining an outcome for each game round based on the selected symbols. 15 In an embodiment, the method of gaming further comprises controlling the correspondence of display positions to reels so that at least one game round is a vertical spin game round in which the reels are arranged to spin 20 vertically such that they correspond to respective ones of the columns. In an embodiment, at least one diagonal win line including a diagonal portion is not rearranged in a transition from 25 the vertical spin game round to the diagonal spin game round allowing the diagonal win line to pass through multiple display positions corresponding to a diagonal reels. 30 In an embodiment, at least another one of the vertically spinning reels of the vertical spin game round is arranged into a non-spinning region in the diagonal spin game round. 35 In an embodiment, the step of controlling in the diagonal spin game round comprises shifting a top display position of at least one vertically spinning reel of the vertical spin game round horizontally in one direction and a bottom display position of the at least one vertically spinning 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 3 reel of the vertical spin game round horizontally in the other direction. In an embodiment, the vertical spin game round includes at 5 least three vertically spinning reels and the step of controlling in a diagonal spin game round comprises rearranging at least three of the vertically spinning reels of the vertical spin game round into linear diagonally spinning reels. 10 In an embodiment, the at least three of the vertically spinning reels rearranged to diagonally spinning reels in the diagonal spin game round are the three centremost reels of a set of five reels. 15 In an embodiment, the step of controlling in the diagonal spin game round comprises allowing at least one of the vertically spinning reels of the vertical spin round to remain spinning vertically. 20 In an embodiment, there are fifteen display positions and the method comprises arranging two reels into non-linear sets of display positions comprising a corner display position and two immediately neighbouring display 25 positions which are disposed diagonally relative to one another. In an embodiment, occurrence of the diagonal spin game round is controlled by a trigger event. 30 According to a second aspect of the invention there is provided a gaming system comprising: a display for symbols to be displayed in a set of display positions arranged in a plurality of rows and 35 columns to a player; a symbol selector for selecting in each game round a plurality of symbols for display, each column of the display positions corresponding to respective ones of a plurality of reels, each reel comprising a plurality of 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 4 symbols, wherein symbols in individual columns are only selected from the plurality of symbols from a corresponding reel; a spin direction controller for controlling the 5 correspondence of display positions to reels so that at least one game round is a diagonal spin game round in which the display positions of at least one column is shifted diagonally such that the display positions in the column occupy positions in neighbouring columns, wherein 10 symbols selected for display in the shifted display positions are selected from the reel corresponding to the at least one column; and an outcome generator arranged to determine an outcome for each game round based on the selected symbols. 15 In an embodiment, the spin direction controller further controls the correspondence of display positions to reels so that at least one game round is a vertical spin game round in which the reels are arranged to spin vertically 20 such that they correspond to respective ones of the columns. In an embodiment, at least one diagonal win line including a diagonal portion is not rearranged in a transition from 25 the vertical spin game round to the diagonal spin game round allowing the diagonal win line to pass through multiple display positions corresponding to a diagonal reels. 30 In an embodiment, the spin direction controller arranges at least another one of the vertically spinning reels of the vertical spin game round into a non-spinning region in the diagonal spin game round. 35 In an embodiment, the spin direction controller in the diagonal spin game round shifts a top display position of at least one vertically spinning reel of the vertical spin game round horizontally in one direction and shifts a bottom display position of the at least one vertically 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 5 spinning reel of the vertical spin game round horizontally in the other direction. In an embodiment, the vertical spin game round includes at 5 least three vertically spinning reels and the spin direction controller in a diagonal spin game round rearranges at least three of the vertically spinning reels of the vertical spin game round into linear diagonally spinning reels. 10 In an embodiment, the at least three of the vertically spinning reels rearranged to diagonally spinning reels in the diagonal spin game round are the three centremost reels of a set of five reels. 15 In an embodiment, the spin direction controller in the diagonal spin game round allows at least one of the vertically spinning reels of the vertical spin round to remain spinning vertically. 20 In an embodiment, there are fifteen display positions and the spin direction controller arranges two reels into non linear sets of display positions comprising a corner display position and two immediately neighbouring display 25 positions which are disposed diagonally relative to one another. In an embodiment, the spin direction controller conducts the diagonal spin game round on the basis of a trigger 30 event. According to a third aspect of the invention there is provided a game controller comprising: a symbol selector for selecting in each game 35 round on a gaming system a plurality of symbols for display to a player in a set of display positions arranged in a plurality of rows and columns on a display, each column of the display positions corresponding to respective ones of a plurality of reels, each reel 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 6 comprising a plurality symbols, wherein symbols in individual columns are only selected from the plurality of symbols from a corresponding reel; a spin direction controller for controlling the 5 correspondence of display positions to reels so that at least one game round is a diagonal spin game round in which the display positions of at least one column is shifted diagonally such that the display positions in the column occupy positions in neighbouring columns, wherein 10 symbols selected for display in the shifted display positions are selected from the reel corresponding to the at least one column; and an outcome generator arranged to determine an outcome for each game round based on the selected symbols. 15 In an embodiment, the spin direction controller further controls the correspondence of display positions to reels so that at least one game round is a vertical spin game round in which the reels are arranged to spin vertically 20 such that they correspond to respective ones of the columns. In an embodiment, at least one diagonal win line including a diagonal portion is not rearranged in a transition from 25 the vertical spin game round to the diagonal spin game round allowing the diagonal win line to pass through multiple display positions corresponding to a diagonal reels. 30 In an embodiment, the spin direction controller arranges at least another one of the vertically spinning reels of the vertical spin game round into a non-spinning region in the diagonal spin game round. 35 In an embodiment, the spin direction controller in the diagonal spin game round shifts a top display position of the at least one vertically spinning reel of the vertical spin game round horizontally in one direction and shifts a bottom display position of the at least one vertically 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 7 spinning reel of the vertical spin game round horizontally in the other direction. In an embodiment, the vertical spin game round includes at 5 least three vertically spinning reels and the spin direction controller in a diagonal spin game round rearranges at least three of the vertically spinning reels of the vertical spin game round into linear diagonally spinning reels. 10 In an embodiment, the at least three of the vertically spinning reels rearranged to diagonally spinning reels in the diagonal spin game round are the three centremost reels of a set of five reels. 15 In an embodiment, the spin direction controller in the diagonal spin game round allows at least one of the vertically spinning reels of the vertical spin round to remain spinning vertically. 20 In an embodiment, there are fifteen display positions and the spin direction controller arranges two reels into non linear sets of display positions comprising a corner display position and two immediately neighbouring display 25 positions which are disposed diagonally relative to one another. In an embodiment, the spin direction controller initiates the diagonal spin game round on the basis of a trigger 30 event. According to a fourth aspect of the invention there is provided computer program code when executed by a computer causes the computer to implement any of the embodiments of 35 the method of gaming of the first aspect of the invention. According to a fifth aspect of the invention there is provided a computer readable medium comprising the program code of the fourth aspect of the invention. 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 8 According to a sixth aspect of the invention there is provided a data signal comprising the computer program code of the fourth aspect of the invention. 5 According to a seventh aspect of the invention, the invention extends to transmitting the program code. Brief Description of Drawings 10 Figure 1 is a block diagram of the core components of a gaming system. Figure 2 is a perspective view of a stand alone gaming 15 machine; Figure 3 is a block diagram of the functional components of a gaming machine; 20 Figure 4 is a schematic diagram of the functional components of a memory; Figure 5 is a schematic diagram of a network gaming system; 25 Figure 6 is a further block diagram of the gaming system; Figure 7 shows a flow diagram for the method of an embodiment of the invention; 30 Figures 8A, 8B and 8C show the displays of Example 1; Figure 9 shows a display of Example 2; 35 Figure 10 shows a display of Example 3; and Figures 11A and 11B show the displays of Example 4. 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 9 Detailed Description Referring to the drawings, there is shown a gaming system having a game controller arranged to implement a game 5 wherein the spin direction of at least one of the reels can be arranged to a diagonal direction. In some embodiments, both diagonal and vertical spins can occur. The gaming system may take a number of different forms. In 10 a first form, a stand alone gaming machine is provided wherein all or most components required for implementing the game are present in a player operable gaming machine. In a second form, a distributed architecture is provided 15 wherein some of the components required for implementing the game are present in a player operable gaming machine and some of the components required for implementing the game are located remotely relative to the gaming machine. For example, a "thick client" architecture may be used 20 wherein part of the game is executed on a player operable gaming machine and part of the game is executed remotely, such as by a gaming server; or a "thin client" architecture may be used wherein most of the game is executed remotely such as by a gaming server and a player 25 operable gaming machine is used only to display audible and/or visible gaming information to the player and receive gaming inputs from the player. However, it will be understood that other arrangements are 30 envisaged. For example, an architecture may be provided wherein a gaming machine is networked to a gaming server and the respective functions of the gaming machine and the gaming server are selectively modifiable. For example, the gaming system may operate in stand alone gaming 35 machine mode, "thick client" mode or "thin client" mode depending on the game being played, operating conditions, and so on. Other variations will be apparent to persons skilled in the art. 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 10 Irrespective of the form, the gaming system comprises several core components. At the broadest level, the core components are a player interface 50 and a game controller 60 as illustrated in Figure 1. The player interface is 5 arranged to enable manual interaction between a player and the gaming system and for this purpose includes the input/output components required for the player to enter instructions and play the game. 10 Components of the player interface may vary from embodiment to embodiment but will typically include a credit mechanism 52 to enable a player to input credits and receive payouts, one or more displays 54, a game play mechanism 56 that includes one or more input devices which 15 enable a player to input game play instructions (e.g. to place bets), and one or more speakers 58. The game controller 60 is in data communication with the player interface and typically includes a processor 62 20 that processes the game play instructions in accordance with game play rules and outputs game play outcomes to the display. Typically, the game play instructions are stored as program code in a memory 64 but can also be hardwired. Herein the term "processor" is used to refer generically 25 to any device that can process game play instructions in accordance with game play rules and may include: a microprocessor, microcontroller, programmable logic device or other computational device, a general purpose computer (e.g. a PC) or a server. 30 A gaming system in the form of a stand alone gaming machine 10 is illustrated in Figure 2. The gaming machine 10 includes a console 12 having a display 14 on which are displayed representations of a game 16 that can be played 35 by a player. A mid-trim 20 of the gaming machine 10 houses a bank of buttons 22 for enabling a player to interact with the gaming machine, in particular during game play. The mid-trim 20 also houses a credit input mechanism 24 which in this example includes a coin input 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 11 chute 24A and a bill collector 24B. Other credit input mechanisms may also be employed, for example, a card reader for reading a smart card, debit card or credit card. A player marketing module (not shown) having a 5 reading device may also be provided for the purpose of reading a player tracking device, for example as part of a loyalty program. The player tracking device may be in the form of a card, flash drive or any other portable storage medium capable of being read by the reading device. 10 A top box 26 may carry artwork 28, including for example pay tables and details of bonus awards and other information or images relating to the game. Further artwork and/or information may be provided on a front 15 panel 29 of the console 12. A coin tray 30 is mounted beneath the front panel 29 for dispensing cash payouts from the gaming machine 10. The display 14 shown in Figure 2 is in the form of a video 20 display unit, particularly a cathode ray tube screen device. Alternatively, the display 14 may be a liquid crystal display, plasma screen, any other suitable video display unit, or the visible portion of an electromechanical device. The top box 26 may also include 25 a display, for example a video display unit, which may be of the same type as the display 14, or of a different type. Figure 3 shows a block diagram of operative components of 30 a typical gaming machine which may be the same as or different to the gaming machine of Figure 2. The gaming machine 100 includes a game controller 101 having a processor 102. Instructions and data to control 35 operation of the processor 102 are stored in a memory 103, which is in data communication with the processor 102. Typically, the gaming machine 100 will include both volatile and non-volatile memory and more than one of each type of memory, with such memories being collectively 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 12 represented by the memory 103. The gaming machine has hardware meters 104 for purposes including ensuring regulatory compliance and monitoring 5 player credit, an input/output (I/O) interface 105 for communicating with peripheral devices of the gaming machine 100. The input/output interface 105 and/or the peripheral devices may be intelligent devices with their own memory for storing associated instructions and data 10 for use with the input/output interface or the peripheral devices. A random number generator module 113 generates random numbers for use by the processor 102. Persons skilled in the art will appreciate that the reference to random numbers includes pseudo-random numbers. 15 In the example shown in Figure 3, a player interface 120 includes peripheral devices that communicate with the game controller 101 comprise one or more displays 106, a touch screen and/or buttons 107, a card and/or ticket reader 20 108, a printer 109, a bill acceptor and/or coin input mechanism 110 and a coin output mechanism 111. Additional hardware may be included as part of the gaming machine 100, or hardware may be omitted as required for the specific implementation. For example, while buttons or 25 touch screens are typically used in gaming machines to allow a player to place a wager and initiate a play of a game any input device that enables the player to input game play instructions may be used. 30 In addition, the gaming machine 100 may include a communications interface, for example a network card 112. The network card may, for example, send status information, accounting information or other information to a central controller, server or database and receive 35 data or commands from the central controller, server or database. Figure 4 shows a block diagram of the main components of an exemplary memory 103. The memory 103 includes RAM 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 13 103A, EPROM 103B and a mass storage device 103C. The RAM 103A typically temporarily holds program files for execution by the processor 102 and related data. The EPROM 103B may be a boot ROM device and/or may contain 5 some system or game related code. The mass storage device 103C is typically used to store game programs, the integrity of which may be verified and/or authenticated by the processor 102 using protected code from the EPROM 103B or elsewhere. 10 It is also possible for the operative components of the gaming machine 100 to be distributed, for example input/output devices 106,107,108,109,110,111 to be provided remotely from the game controller 101. 15 Figure 5 shows a gaming system 200 in accordance with an alternative embodiment. The gaming system 200 includes a network 201, which for example may be an Ethernet network. Gaming machines 202, shown arranged in three banks 203 of 20 two gaming machines 202 in Figure 5, are connected to the network 201. The gaming machines 202 provide a player operable interface and may be the same as the gaming machines 10,100 shown in Figures 2 and 3, or may have simplified functionality depending on the requirements for 25 implementing game play. While banks 203 of two gaming machines are illustrated in Figure 5, banks of one, three or more gaming machines are also envisaged. One or more displays 204 may also be connected to the 30 network 201. For example, the displays 204 may be associated with one or more banks 203 of gaming machines. The displays 204 may be used to display representations associated with game play on the gaming machines 202, and/or used to display other representations, for example 35 promotional or informational material. In a thick client embodiment, game server 205 implements part of the game played by a player using a gaming machine 202 and the gaming machine 202 implements part of the 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 14 game. With this embodiment, as both the game server and the gaming device implement part of the game, they collectively provide a game controller. A database management server 206 may manage storage of game programs 5 and associated data for downloading or access by the gaming devices 202 in a database 206A. Typically, if the gaming system enables players to participate in a Jackpot game, a Jackpot server 207 will be provided to perform accounting functions for the Jackpot game. A loyalty 10 program server 212 may also be provided. In a thin client embodiment, game server 205 implements most or all of the game played by a player using a gaming machine 202 and the gaming machine 202 essentially 15 provides only the player interface. With this embodiment, the game server 205 provides the game controller. The gaming machine will receive player instructions, pass these to the game server which will process them and return game play outcomes to the gaming machine for 20 display. In a thin client embodiment, the gaming machines could be computer terminals, e.g. PCs running software that provides a player interface operable using standard computer input and output components. 25 Servers are also typically provided to assist in the administration of the gaming network 200, including for example a gaming floor management server 208, and a licensing server 209 to monitor the use of licenses relating to particular games. An administrator terminal 30 210 is provided to allow an administrator to run the network 201 and the devices connected to the network. The gaming system 200 may communicate with other gaming systems, other local networks, for example a corporate 35 network, and/or a wide area network such as the Internet, for example through a firewall 211. Persons skilled in the art will appreciate that in accordance with known techniques, functionality at the 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 15 server side of the network may be distributed over a plurality of different computers. For example, elements may be run as a single "engine" on one server or a separate server may be provided. For example, the game 5 server 205 could run a random number generator engine. Alternatively, a separate random number generator server could be provided. Further, persons skilled in the art will appreciate that a plurality of games servers could be provided to run different games or a single game server 10 may run a plurality of different games as required by the terminals. Embodiments of the invention relate to gaming systems for implementing games that involve a display of spinning 15 reels as part of the display of the outcome of the game. The game controllers of such gaming systems have a stop determining function that accesses a random number generator to determine the stop position for each reel. For example, if there are five reels, each having twenty 20 symbols, the stop determining function might determine that the stop positions correspond to the symbols at positions 3, 13, 7, 9 and 17 of their respective reel. The spinning of the reels is then controlled so that each selected symbol comes to a stop at a designated place. The 25 symbols shown at other display positions of each reel are automatically selected because they are on the same reel strip such that neighbouring symbols will be shown at the other display positions. 30 Exemplary embodiments of the present invention relate to gaming systems that allow a player to select how many win lines of a plurality of win lines they will play in each game - i.e. a minimum of one win line up to the maximum number of win lines allowed by the game. Each win line is 35 formed by a set of symbol positions consisting of one symbol position from each reel. That is, a designated symbol position of each reel is assigned to a win line. The symbol positions that constitute each of the win lines are usually advertised to the player by markings on the 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 16 display or diagrams showing the symbol positions that correspond to each win line. The win lines may incorporate for example, horizontal or incorporate diagonal line portions. 5 Diagonal win line portions admit the possibility that in a diagonal spin game round of the present invention, the win line can include all of the visible reel positions of a single reel, allowing for different win probabilities 10 especially when the reel has a "stacked symbol" (i.e. a repeated set of the same symbol in adjacent positions on the reel). Diagonal win lines also allow for different interactions between the symbols of the reels and the win lines. Embodiments exploiting these possibilities are 15 described in more detail below. The game controller of one embodiment is shown in more detail in Figure 6. The game controller 60 incorporates a processor 62 which implements a symbol selector 610, 20 random number generator 650, spin direction controller 620 comprising vertical spin controller 621 and diagonal spin controller 622, and outcome generator 630 based on program code stored in memory 64. Persons skilled in the art will appreciate that one or more of these components could be 25 provided in other ways, for example by a dedicated circuit. Symbol selector 610 selects symbols from symbol data 641 using random numbers from random number generator 650, to 30 appear at display positions on the display 54. For example, by selecting stop positions for a plurality of reels defined by symbol data 641 as described above. Symbol selector 610 works in cooperation with spin direction controller 620 which controls the correspondence 35 between the reels and the display positions. In one embodiment the game round may be a conventional vertical spin game round or a diagonal spin game round, as determined in response to a trigger event which may be for example, a player input from game play mechanism 56 (for 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 17 example, a specific bet type such as an ante bet), by a random event obtained either directly from random number generator 650, or by a previous game round outcome such as a special prize determined by outcome generator 630 or a 5 specific combination of symbols. In a vertical spin game round as is conventionally played, vertical spin controller 621 informs symbol selector 610 that the visible reel positions are to correspond vertically with the reels. In a diagonal spin game round, diagonal spin 10 controller 622 informs symbol selector 610 of a different correspondence where at least one of the reels has the visible reel positions disposed diagonally across the display positions. Which particular reel or reels are modified may be predetermined or controlled by player 15 choice, random event or previous game outcome. Spin direction controller 620 and in particular diagonal spin controller 622 also communicates with outcome generator 630 to determine whether any win lines should be adjusted. 20 The outcome generator 630 calculates any prize associated with the current game round depending on game instructions 644, prize data 645 and any modifications to win lines dictated by diagonal spin controller 622. The outcome generator then updates meter data 645, and displays any 25 win on display 54 on the player interface 50. Now referring to Figure 7, a flow diagram for an embodiment of the invention is shown. The step of determining whether the reels should spin diagonally 1201 30 is first performed, with input from player choice, random event or previous win combination. If the answer is "no", the vertical spin controller 621 informs symbols selector 610 of a particular correspondence between the display positions and the reels as well as which reels are to spin 35 so that the reels will spin vertically. Any win line which has been adjusted in a previous diagonal spin game round is reset to its previous position. If the answer is "yes", in step 1202 the diagonal spin controller 622 informs symbol selector 610 of a particular correspondence between 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 18 the display positions and the reels as well as which reels are to spin so that at least one of the reels will spin diagonally. In one embodiment, the visible reel positions of at least one of the reels is moved into a corner to 5 accommodate other reels with diagonal spins, the former reel being frozen for the diagonal spin. In a variant of this embodiment, the reels spins but the reel is non linear in the sense that the three display positions which correspond to the reel do not follow a straight line but 10 these reels are still spun. In step 1203 the diagonal spin controller determines from player choice, random event or previous win combination whether the win lines are to be adjusted. If the answer is 15 "no", the win lines remain as the same set of display positions set during a conventional vertical spin game round. If the answer is "yes", the win lines are adjusted in step 1204. In one example, if a win line contained a diagonal element that would have allowed all the visible 20 reel positions of a single reel to fall on the win line, the win line is rearranged to avoid such coincidence, for example, a different set of win lines may apply in diagonal spin rounds to vertical spin rounds. In another embodiment, the win lines may remain the same, for example 25 so that a player may obtain additional benefits from stacked symbols on a reel. Accordingly, in one example, a first award made to a player is to award stacked symbols and a second award is to conduct one or more diagonal spin rounds. 30 In step 1206 the symbol selector 610 is cleared to spin the reels, using random number generator 650 and symbol data 641, and the result is displayed on display 54. 35 In step 1207 outcome generator 630 determines the game round outcome from prize data 645 using win lines as possibly modified by the spin direction controller 620. It will be appreciated that the invention is not 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 19 restricted to a particular direction of diagonal shift or a particular number of affected reels. It will also be appreciated that an alternative to rearranging the non participating reels into corners is to overwrite those 5 positions and even leave some positions blank or with special symbols. It will further be appreciated that the non-diagonal and non-vertical reels could also be "spun" in their crooked-leg orientations. It will also be appreciated that in one extreme, all of the game rounds 10 can be diagonal spin game rounds. Example 1 Now referring to Figures 8A, 8B and 8C, an example of one 15 embodiment of the method of the invention is shown. In Figure 8A the display is divided after a vertical spin game round into five reels 840a to 840e numbered 1 to 5 from left to right each displaying three symbols in a vertical visible reel window, arranged into top line 850a, 20 centre line 850b and bottom line 850c such that there are 15 display positions in total. The spin directions in the vertical spin round were as specified by the five vertical arrows X. Triggered by a random event, the spin direction controller determines that a diagonal spin game round will 25 now occur. The central three reels, numbers 2, 3 and 4, will be shifted to diagonal spins as indicated by arrows Y and are individually shaded in the diagram. In figure 8B the result of the rearrangement is seen, where reels 2, 3 and 4 are shifted horizontally one position left on the 30 top line and horizontally one position right on the bottom line. Reel 1 is rearranged to occupy the three positions in the bottom left and reel 5 is rearranged to occupy the three positions in the top right. In Figure 8C the result of the diagonal spin game round is shown. In this example, 35 Reel 1 and reel 5 did not spin, being neither diagonal nor vertical. (In other embodiments they can spin with the display positions having a designated relationship such that the symbol order on the reel is preserved relative to the display positions.) Reels 2, 3 and 4 have spun 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 20 diagonally. Reel 2 shows three Kings in its three display positions, having a "stacked symbol". The prize is now evaluated by outcome generator 630. The 5 win line in this example was the default centre line, which was not changed by diagonal spin controller 622. There are no prizes awarded, so meter data 646 is not updated. 10 Example 2 Now referring to Figure 9, another example is shown as a variant on the play of example 1. The play is the same as in example 1, except that in this example the win line has 15 been set as the zigzag line shown. Diagonal spin controller 622 has determined that the zigzag line is not to be adjusted for the diagonal spin game round. The win line passes through all of the visible reel positions of reel 2. Since Reel 2 has a stacked symbol, the consequence 20 is that the win line picks up all the three Kings. The prize is now evaluated by outcome generator 630 and the player is paid for four Kings on the win line. Example 3 25 Now referring to Figure 10, another example is shown as a further variant on the play of example 1. Starting from the same configuration of symbols show in Figure 8A, diagonal spin controller 622 triggered by a random event 30 has determined that reel 2 will be rearranged to a diagonal position. Reels 1 and 3 are shifted as shown to make way. Reels 4 and 5 are unaffected and will spin vertically. Thus in this example, reel 2 will spin diagonally, reels 4 and 5 will spin vertically and reels 1 35 and 3 will be frozen. Example 4 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 21 Now referring to Figures 11A and 11B, there is shown a further example where Reel 2 has stacked symbols in the form of a lot of wild symbols but could also be composed solely of wild symbols. In Figure 11A there are 3 played 5 win lines corresponding to the rows of display positions. In Figure 11A there are now winning symbol combinations. A diagonal spin is triggered and the reels are rearranged such that Reel 1 1110 occupies the bottom left display 10 positions, Reels 2,3, and 4 1120,1130,1140 occupy diagonal lines of display positions and Reel 5 1150 occupies the top right display positions. The reels have each been re spun as shown in Figure 11B such that there is a winning combination of wild, Q,Q on the top line paying 3 queens 15 and a winning combination of A, wild, A paying 3 Aces on the centre line. Persons skilled in the art will appreciate that the method of the embodiment could be embodied in program code. The 20 program code could be supplied in a number of ways, for example on a computer readable medium, such as a disc or a memory (for example, that could replace part of memory 103) or as a data signal (for example, by transmitting it from a server). 25 Persons skilled in the art will also appreciate that many variations may be made to the invention without departing from the scope of the invention. 30 In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, 35 i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention. It is to be understood that, if any prior art publication 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 22 is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country. 4310501_ 1 (GHMatters) P75995.AU.3 2/05/13

Claims (34)

1. A method of gaming comprising: selecting in each game round a plurality of 5 symbols for display to a player in a set of display positions arranged in a plurality of rows and columns, each column of the display positions corresponding to respective ones of a plurality of reels, each reel comprising a plurality symbols, wherein symbols in 10 individual columns are only selected from the plurality of symbols from a corresponding reel; controlling the correspondence of display positions to reels so that at least one game round is a diagonal spin game round in which the display positions of 15 at least one column is shifted diagonally such that the display positions in the column occupy positions in neighbouring columns, wherein symbols selected for display in the shifted display positions are selected from the reel corresponding to the at least one column; 20 determining an outcome for each game round based on the selected symbols.

2. A method of gaming as claimed in claim 1 further comprising controlling the correspondence of display 25 positions to reels so that at least one game round is a vertical spin game round in which the reels are arranged to spin vertically such that they correspond to respective ones of the columns. 30

3. A method of gaming as claimed in claim 2 wherein at least one diagonal win line including a diagonal portion is not rearranged in a transition from the vertical spin game round to the diagonal spin game round allowing the diagonal win line to pass through multiple 35 display positions corresponding to a diagonal reels.

4. A method of gaming as claimed in any one of claims 2 to 3 wherein at least another one of the vertically spinning reels of the vertical spin game round 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 24 is arranged into a non-spinning region in the diagonal spin game round.

5. A method of gaming as claimed in any one of 5 claims 2 to 4 wherein controlling the diagonal spin game round comprises shifting a top display position of at least one vertically spinning reel of the vertical spin game round horizontally in one direction and a bottom display position of the at least one vertically spinning 10 reel of the vertical spin game round horizontally in the other direction.

6. A method of gaming as claimed in claim 5 wherein the vertical spin game round includes at least three 15 vertically spinning reels and the step of controlling in a diagonal spin game round comprises rearranging at least three of the vertically spinning reels of the vertical spin game round into linear diagonally spinning reels. 20

7. A method of gaming as claimed in claim 6 wherein the at least three of the vertically spinning reels rearranged to diagonally spinning reels in the diagonal spin game round are the three centremost reels of a set of five reels. 25

8. A method of gaming as claimed in any one of claims 2 to 8 wherein controlling the diagonal spin game round comprises allowing at least one of the vertically spinning reels of the vertical spin round to remain 30 spinning vertically.

9. A method as claimed in claim 7, wherein there are fifteen display positions and the method comprises arranging two reels into non-linear sets of display 35 positions comprising a corner display position and two immediately neighbouring display positions which are disposed diagonally relative to one another.

10. A method of gaming as claimed in any one of 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 25 claims 1 to 9 wherein occurrence of the diagonal spin game round is controlled by a trigger event.

11. A gaming system comprising: 5 a display for symbols to be displayed in a set of display positions arranged in a plurality of rows and columns to a player; a symbol selector for selecting in each game round a plurality of symbols for display, each column of 10 the display positions corresponding to respective ones of a plurality of reels, each reel comprising a plurality of symbols, wherein symbols in individual columns are only selected from the plurality of symbols from a corresponding reel; 15 a spin direction controller for controlling the correspondence of display positions to reels so that at least one game round is a diagonal spin game round in which the display positions of at least one column is shifted diagonally such that the display positions in the 20 column occupy positions in neighbouring columns, wherein symbols selected for display in the shifted display positions are selected from the reel corresponding to the at least one column; and an outcome generator arranged to determine an 25 outcome for each game round based on the selected symbols.

12. A gaming system as claimed in claim 11 wherein the spin direction controller further controls the correspondence of display positions to reels so that at 30 least one game round is a vertical spin game round in which the reels are arranged to spin vertically such that they correspond to respective ones of the columns.

13. A gaming system as claimed in claim 12 wherein at 35 least one diagonal win line including a diagonal portion is not rearranged in a transition from the vertical spin game round to the diagonal spin game round allowing the diagonal win line to pass through multiple display positions corresponding to a diagonal reels. 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 26

14. A gaming system as claimed in any one of claims 12 to 13 wherein the spin direction controller arranges at least another one of the vertically spinning reels of the 5 vertical spin game round into a non-spinning region in the diagonal spin game round.

15. A gaming system as claimed in any one of claims 12 to 14 wherein the spin direction controller in the 10 diagonal spin game round shifts a top display position of at least one vertically spinning reel of the vertical spin game round horizontally in one direction and shifts a bottom display position of the at least one vertically spinning reel of the vertical spin game round horizontally 15 in the other direction.

16. A gaming system as claimed in claim 15 wherein the vertical spin game round includes at least three vertically spinning reels and the spin direction 20 controller in a diagonal spin game round rearranges at least three of the vertically spinning reels of the vertical spin game round into linear diagonally spinning reels. 25

17. A gaming system as claimed in claim 16 wherein the at least three of the vertically spinning reels rearranged to diagonally spinning reels in the diagonal spin game round are the three centremost reels of a set of five reels. 30

18. A gaming system as claimed in any one of claims 11 to 17 wherein the spin direction controller in the diagonal spin game round allows at least one of the vertically spinning reels of the vertical spin round to 35 remain spinning vertically.

19. A gaming system as claimed in claim 17, wherein there are fifteen display positions and the spin direction controller arranges two reels into non-linear sets of 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 27 display positions comprising a corner display position and two immediately neighbouring display positions which are disposed diagonally relative to one another. 5

20. A gaming system as claimed in any one of claims 11 to 19 wherein the spin direction controller conducts the diagonal spin game round on the basis of a trigger event. 10

21. A game controller comprising: a symbol selector for selecting in each game round on a gaming system a plurality of symbols for display to a player in a set of display positions arranged in a plurality of rows and columns on a display, each 15 column of the display positions corresponding to respective ones of a plurality of reels, each reel comprising a plurality symbols, wherein symbols in individual columns are only selected from the plurality of symbols from a corresponding reel; 20 a spin direction controller for controlling the correspondence of display positions to reels so that at least one game round is a diagonal spin game round in which the display positions of at least one column is shifted diagonally such that the display positions in the 25 column occupy positions in neighbouring columns, wherein symbols selected for display in the shifted display positions are selected from the reel corresponding to the at least one column; and an outcome generator arranged to determine an 30 outcome for each game round based on the selected symbols.

22. A game controller as claimed in claim 21 wherein the spin direction controller further controls the correspondence of display positions to reels so that at 35 least one game round is a vertical spin game round in which the reels are arranged to spin vertically such that they correspond to respective ones of the columns.

23. A game controller as claimed in claim 22 wherein 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 28 at least one diagonal win line including a diagonal portion is not rearranged in a transition from the vertical spin game round to the diagonal spin game round allowing the diagonal win line to pass through multiple 5 display positions corresponding to a diagonal reels.

24. A game controller as claimed in any one of claims 22 to 23 wherein the spin direction controller arranges at least another one of the vertically spinning reels of the 10 vertical spin game round into a non-spinning region in the diagonal spin game round.

25. A game controller as claimed in any one of claims 22 to 24 wherein the spin direction controller in the 15 diagonal spin game round shifts a top display position of the at least one vertically spinning reel of the vertical spin game round horizontally in one direction and shifts a bottom display position of the at least one vertically spinning reel of the vertical spin game round horizontally 20 in the other direction.

26. A game controller as claimed in claim 25 wherein the vertical spin game round includes at least three vertically spinning reels and the spin direction 25 controller in a diagonal spin game round rearranges at least three of the vertically spinning reels of the vertical spin game round into linear diagonally spinning reels. 30

27. A game controller as claimed in claim 26 wherein the at least three of the vertically spinning reels rearranged to diagonally spinning reels in the diagonal spin game round are the three centremost reels of a set of five reels. 35

28. A game controller as claimed in any one of claims 22 to 27 wherein the spin direction controller in the diagonal spin game round allows at least one of the vertically spinning reels of the vertical spin round to 4310501_1 (GHMatters) P75995.AU.3 2/05/13 - 29 remain spinning vertically.

29. A game controller as claimed in claim 27, wherein there are fifteen display positions and the spin direction 5 controller arranges two reels into non-linear sets of display positions comprising a corner display position and two immediately neighbouring display positions which are disposed diagonally relative to one another. 10

30. A game controller as claimed in any one of claims 21 to 29 wherein the spin direction controller initiates the diagonal spin game round on the basis of a trigger event. 15

31. Computer program code which when executed by a computer causes the computer to implement the method of gaming of any one of claims 1 to 10.

32. A computer readable medium comprising the program 20 code of claim 31.

33. A data signal comprising the computer program code of claim 31. 25

34. Transmitting the computer program code of claim 31. 4310501_ 1 (GHMatters) P75995.AU.3 2/05/13