AU777028B2 - Gaming machine - Google Patents

Description

-1-

AUSTRALIA

PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

Name of Applicant/s: Ainsworth Game Technology Limited Actual Inventor/s: Jason Meyer Address for Service: BALDWIN SHELSTON WATERS MARGARET STREET SYDNEY NSW 2000 CCN: 3710000352 Invention Title: 'GAMING MACHINE' Details of Associated Provisional Application No. PR3074 dated 21 December, 2000 The following statement is a full description of this invention, including the best method of performing it known to us:- File: 29986AUP02 Occ-. -2- FIELD OF THE INVENTION The present invention relates to gaming machines. The invention has been developed primarily for computerised gaming machines such as stand alone "poker machines" or Internet facilitated gaming. In light of the prevalence of these forms of gaming, the invention will be described herein with reference to that application.

However, the invention is not limited to this and may be suitable for many other applications.

BACKGROUND OF THE INVENTION ooooo S• Any discussion of the prior art throughout the specification should in no way be 10 considered as an admission that such prior art is widely known or forms part of common general knowledge in the field.

•Gaming machines have long been known and are now one of the most common forms of gambling. Usually gaming machines will simulate a well-known game of chance. One of the oldest and best known forms of gaming machine is the rotating reel type "poker machine". Poker machines use a series of three, four or five reels, each reel having symbols on its peripheral edge. The reels are rotated upon the placement of a bet and then stopped to produce an array of randomly arranged symbols. Winnings are paid if the random arrangement of symbols matches one of the predetermined winning combinations.

Gaming machines can "pay winnings" in a variety of ways. These include dispensing money, dispensing tokens that can be redeemed for money, or simply adding credits to a credit meter that can be used for placing future bets or redeemed as money.

More recently these gaming machines have been computerised in the form of stand alone machines or simulations of the stand alone machines accessible via the Internet.

-3- Computerised machines usually award winnings in the form of credits tallied on a credit meter. In light of their wide spread use, the invention will be described in the context of this type of winnings payment mechanism. However those skilled in the art will readily understand that the term encompasses other many payment mechanisms.

Computerised gaming machines use a video screen display instead of physically rotating reels. The display typically presents an array of symbols in five columns and three rows equating to the symbols that would normally be seen on the five physically rotating reels of an old style mechanical machine. Computerised machines have allowed players to simultaneously bet on the combination of symbols appearing in many different ••10 part of the array. These parts of the array are often referred to as "paylines" consisting of lines of adjacent symbols extending through the array. The symbols may be laterally •adjacent each other (as in from the same row) or diagonally adjacent each other. They usually extend along each row as well as various angled or "zigzag" lines through the array. This provides a more interesting and exciting game than the old style mechanical machines which traditionally only offered a single payline through the middle row.

A common feature on gaming machines of this type is the use of"wildcards".

Wildcards are well known in many card games as cards that have been designated as substitutes for other cards. Similarly, wildcard symbols appearing in the array of symbols on a gaming machine can substitute for other symbols.

The appearance of a wildcard on any paylines carrying a bet is beneficial as it increases the probability of forming a winning combination. Wildcards can also provide an incentive for players to place bets on most, if not all the available paylines. Each symbol in the array will usually be part of more than one payline. Therefore, the probability of a winning payline (that is, a payline which carries a bet and shows a -4winning combination of symbols) is significantly increased if one or more wildcards appear in an array in which the player has bet on all available paylines.

Despite these significant benefits, players are now very familiar with the wildcard feature and its appearance in an array of symbols does not provide a strong sense of bonus or incentive for many seasoned players.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.

According to a first aspect, the present invention provides a gaming machine o.

o i'o 10 adapted to display an array of symbols randomly selected from a set of symbols and paying winnings on the occurrence of predetermined winning combinations of symbols ":":-appearing in predetermined portions of the array, the set of symbols having one or more wildcards that can substitute for any other symbol in the set in order to form one of the winning combinations; wherein, 15 in response to a predetermined trigger event, at least one of the wildcards forming **oo.

part of one of the winning combinations increases the winnings normally paid on that winning combination.

Preferably, the predetermined portions of the array are paylines and any paylines carrying a bet and showing a winning combination is a winning payline; wherein the predetermined trigger event is a designated combination of the wildcards appearing in the array, such that the winnings normally paid on any winning paylines incorporating any of the wildcards from the designated combination are increased.

In another preferred form, the predetermined trigger event is a selected relative positioning of at least two of the wildcards.

By configuring the machine such that certain combinations and/or configurations of wildcards will increase the winnings paid on winning paylines, the wildcard aspect of the game is more rewarding and therefore more interesting for players.

In some preferred forms, the designated combination must appear in adjacent positions of the array such that the combination is then presented as a single symbol that is larger than the remaining symbols within the array. This allows the appearance of the designated combination to have a strong visual impact which reinforces to the player that it provides increased winnings.

ooo: In further preferred forms, the designated combination also includes symbols from 0 the set other than the wildcard symbols. By allowing non-wildcard symbols to form part of the designated combinations, the game designer can have the designated combination appear more frequently without needing to use a set of symbols with relatively large numbers of wildcards. It will be appreciated that increasing the number of wildcards in a set of symbols significantly increases the probability of winning combinations within the 15 paylines. If this is the case then the machine cannot afford to be too generous with the oO*o winnings that it pays without compromising the profit from the machine.

Preferably, each of the wildcards in the combination are individually assigned a multiplying factor such that whenever one of the wildcards appears in a winning payline, the win normally paid is multiplied by the multiplying factor. In other preferred embodiments, the multiplying factors are randomly selected from a preset range.

In some embodiments, the multiplying factor is related to, or otherwise linked to, the total number of wildcards that appear in the array.

Preferably, all wildcard symbols have a multiplying factor whenever they appear in the array such that in response to the trigger event, winning paylines with two or more of -6the wildcards have their multiplying factors added or multiplied together to give a larger multiplying factor which is applied to the usual winnings of the winning payline.

In this form, the returns to the player would be particularly generous and this provides a strong incentive to continue playing the machine. This is especially so if the trigger event is designated combination which incorporates non-wildcard symbols and the multiplying factor calculated for the wildcards within the designated combination is also applied to the non-wildcard symbols within the designated combination.

In some particularly preferred forms, the array has more than five columns of symbols and/or more than three rows of symbols. It will be appreciated that an oversized go i symbol appearing in a larger array will have more visual impact.

0* BRIEF DESCRIPTION OF THE DRAWINGS Preferred embodiments will now be described, by way of example only, with reference to the accompanying drawings in which: 00 4 C Figure 1 is a schematic representation of the display screen of a gaming machine 00000.

15 according to the present invention; and Figure 2 is a schematic representation of the display screen of a gaming machine according to another form of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the figures, the gaming machine displays an array of symbols arranged in five columns and seven rows. The columns are presented on the display screen as simulations of reels 41,42, 43, 44 and 45, which spin to randomly arrange the symbols within the array 40. The set of symbols includes several wildcards 20, 21, 22, 23 and 24, which can substitute for any of the other symbols in order to form a winning combination of symbols on a payline carrying a bet.

-7- The array 40 has paylines 1-1 through 19-19 available for placing a bet. The various winning combinations and the credits awarded for a minimum bet on each is tabulated somewhere on the screen or facia. This table is commonly referred to as the 'paytable' or 'scorecard'. As is typical in the industry, the gaming machine portrays a particular theme or motif on the machine facia and through aspects of the game itself.

For example, the theme may be related to Olympic competition, whereby the three different types of wildcard are depictions of gold, silver, or bronze medals.

Upon the occurrence of a winning combination in a payline carrying a bet (that is, Sa winning payline), the machine will pay winnings calculated from the amount wagered 10 on the payline and the payout level shown on the scorecard.

If a wildcard appears in a payline carrying a bet, the players' chances of a winning •payline are improved as the wildcard substitutes for any of the other symbols. As shown in Figure 1, the machine is also configured so that certain combinations of wildcards will *o yield their own benefit in addition to the winning paylines. In this case, a 15 gold/silver/bronze wildcard combination scattered anywhere in the array 40 gives each wildcard in the combination 20, 21 and 24, a multiplying factor 25, 26 and 27 respectively. A multiplying factor multiplies the winnings normally received for any winning paylines incorporating that wildcard.

The multiplying factors may be fixed whereby gold wildcards will always be assigned on multiplying factor of 3 while silver and bronze are assigned multiplying factors of 2 and 1.5 respectively. The multiplying factors may also be randomly selected from a predetermined range of multiplying factors, say 1 to Alternatively, certain wildcard combinations could simply add a set amount of bonus credits to any winnings from the winning paylines or provide some other type of -8potential benefit to the player. This will be at the discretion of the game designer in light of the desired "volatility" of the game.

The volatility of a gaming machine refers to the expected frequency of wins and corresponding amount paid for each win. Over time, all gaming machines return a set percentage of the bets received as winnings. However, a machine with high volatility will return this percentage through fewer wins of higher value as opposed to a low volatility machine providing more wins of less value. By giving the wildcards the ability to influence the winnings paid when they appear in a winning hand they can be used to adjust the volatility of the gaming machine to any desired level.

•10 If two or more wildcards appear in the same winning payline, it is a simple matter for the game designer to determine how the winnings will be affected in order to maintain the desired level of volatility. The multiplying factors may be added together or multiplied together before being applied to the winnings of the winning payline.

Alternatively, the game may simply use the highest multiplying factor and ignore any others.

Referring to Figure 2, the game is configured so that whenever the wildcards 20 to 24 are adjacent each other on a single reel 45, they are graphically merged and presented as a single oversized wildcard symbol 28. While the wildcards 22 to 24 are shown as a single oversized symbol they still have individually assigned multiplying factors which will effect only those winning paylines incorporating the individual wildcard. However, the game designer may wish to apply a single multiplying factor to the entire oversized wildcard 28. Again this may be predetermined or randomly selected depending on the desired level of volatility.

-9- Furthermore, the adjacent wildcard symbols need not be on the same reel. The wildcards may be next to each other on adjacent reels and the predetermined combination of symbols required form an oversized wildcard need not consist only of the individual wildcard symbols. The game designer may wish to incorporate other symbols from the array. Of course this also influence volatility.

By adding an extra benefit to wildcard in response to a trigger, the well known and accepted wildcard aspect is given an additional dimension. It allows a game where S.players not only look to achieve certain combinations of the 'regular' symbols, but also certain combinations of the wildcard symbols and or certain arrangements of the 10 wildcard symbols.

If the wildcard greatly increases the winnings paid then its occurrence in a payline carrying a bet, it is more likely to give the player a strong sense of bonus. By using adjacent sets of wildcards in the array, they can have greater visual appeal and impact.

Furthermore, they can significantly increase any winning amounts, especially if all 15 available paylines are played. This provides a strong incentive for the player to maximise the number of paylines played which tends to increase the amount they bet.

This in turn makes the machine more profitable for the owner.

The present invention has been described herein by way of example only.

Ordinary workers in this field will readily recognise many variations and modifications which do not depart from the spirit and scope of the broad inventive concept.

Claims (10)

1. A gaming machine adapted to display an array of symbols randomly selected from a set of symbols and paying winnings on the occurrence of predetermined winning combinations of symbols appearing in predetermined portions of the array, the set of symbols having one or more wildcards that can substitute for any other symbol in the set in order to form one of the winning combinations; wherein, in response to a predetermined trigger event, at least one of the wildcards forming part of one of the winning combinations increases the winnings normally paid on that oeoo# S: winning combination. 10

2. A gaming machine according to claim 1, the predetermined portions of the array are paylines and any paylines carrying a bet and showing a winning combination is a winning payline; wherein the predetermined trigger event is a designated combination of the wildcards appearing in the array, such that the winnings normally paid on any winning paylines incorporating any of the wildcards from the designated combination are increased.

3. A gaming machine according claim 1, wherein the predetermined trigger event is selected relative positioning of at least two of the wildcards.

4. A gaming machine according to claim 2, wherein the designated combination must appear in the adjacent positions of the array such that the combination is then presented as a single symbol that this larger than the remaining symbols within the array.

A gaming machine according to claim 2, wherein the designated combination also includes symbols from the set other than the wildcard symbols.

6. A gaming machine according to claim 2, wherein all wildcard symbols have a multiplying factor whenever they appear in the array such that in response to the trigger -ii 1 event, winning paylines with two or more of the wildcards have their multiplying factors added or multiplied together to give a larger multiplying factor which is applied to the usual winnings of the winning payline.

7. A gaming machine according to claim 6, wherein the multiplying factors are randomly selected from a preset range.

8. A gaming machine according to claim 6, wherein the multiplying factors are related or otherwise linked to the total number of wildcards that have appeared in the array.

9. A gaming machine according to claim 6, wherein all the wildcard symbols have a 10 multiplying factor whenever they appear in the array such that in response to the trigger event, and any winning paylines with two or more of the wildcards have their multiplying factors added or multiplied together to give a larger multiplying factor which is applied to the usual wins of the winning payline.

10. A gaming machine substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings. DATED this 13 th Day of December, 2001 AINSWORTH GAME TECHNOLOGY LIMITED Attorney: KENNETH W. BOLTON Registered Patent and Trade Mark Attorney of Australia of BALDWIN SHELSTON WATERS