JP2008073370A - Game machine, fraudulency preventing method for game machine, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit fraudulency using a sensible device for a game machine. <P>SOLUTION: This game machine includes a prize winning lottery means for performing lottery based on a signal from a start switch and determining prize winning based on the lottery result. The prize winning lottery means includes: a random number generator for generating a random number for lottery; a random number extract device for extracting a random number generated by the random number generator based on the signal of the switch; a communicating device for communicating with RFID provided in a game medium thrown in to play a game; a synthesizing part for synthesizing the data read from the RFID by the communicating device with a value extracted by the random number extract device; and a determination part for determining at least either prize winning or losing of the random number value output from the synthesizing part or the kind of prize winning. The random number is fluctuated according to the data of RFID of the game medium. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gaming machine, a gaming machine fraud prevention method, and a program. In particular, the present invention relates to a technique for preventing an illegal act related to pressing of a start switch.

  A gaming machine such as a slot machine is provided with a medal slot so that a player can enjoy a game by inserting a predetermined number of medals. The medals necessary for the game can be borrowed with a medal lending machine provided in the game hall, and the game can be started by inserting it into the medal slot of a desired gaming machine.

The operation of the conventional gaming machine was as follows.
First, when the start switch is operated, the start switch is turned on. In response to this, a lottery process is performed by the winning lottery means inside the gaming machine. Here, when a predetermined combination is won, a winning flag is set. The rotating reel starts to rotate. When the stop switch is operated, the stop switch is turned on. Then, the rotation of the corresponding rotating reel is stopped. After the stop switches corresponding to all the rotating reels are operated, whether or not the winning symbols corresponding to the winning flag are aligned on the effective winning line while the winning flag is established, that is, whether or not the winning is confirmed Is determined. When it is determined that the winning is confirmed, a medal corresponding to the winning symbol is paid out.

  For example, when the evaluation of the lottery process is out of place, it is set so that the predetermined symbols are not aligned (so-called kicking), and when winning, the predetermined symbols are aligned on the condition that the stop switch is pressed at a predetermined timing. (So-called pull-in). In other words, only when winning in the lottery process, medals are paid out by winning a winning pattern under a predetermined condition, but when not winning, medals are paid out regardless of how the stop switch is operated. There is no. This is to keep the medal payout at a certain probability. In order to realize this, a random number generator is used in the lottery process.

  A random number generator of a gaming machine generates a random number using a counter, for example. The random numbers generated in this case have a certain degree of regularity, and therefore have a predictable aspect. For example, as shown in FIG. 12, the random number generator (counter) sequentially generates numerical values from 0000 to FFFF (hexadecimal) at a constant cycle. The output of the counter, which is constantly changing, is the timing of depressing the start switch (in FIG. 12, the signal rising timings t1 and t3. The start switch depressing signal is positive logic, and the signal goes high when the start switch is depressed. And the lottery process using the random number as a random value (the value of the code A is output as the random value at the timing t1, and the value of the code B is output as the random value at the timing t2) . The cycle of updating the counter output is very short, and even if it is known that the random number value has periodicity, it is difficult for the human industry to obtain the desired value. The counter output could be regarded as a pseudo-random number.

  However, the possibility that the player can skillfully operate the start switch using some device to increase the lottery probability beyond a predetermined value cannot be denied. For example, a low-frequency treatment device (hereinafter referred to as “sensory device”) is attached to the arm, and the timing of pressing the start switch is adjusted by periodically stimulating the muscles of the arm, and similar random values are repeatedly acquired. It was thought that. In the example of FIG. 12, since the repetition period of the random number generator (counter) is T, the same random number value can be obtained in principle by setting the push switch depression period TS to an integral multiple of T. . It seems that cheating is performed by adjusting the period of stimulation by the sensory sensor. Although it is forbidden to operate the start switch with the help of any device, the detection is not easy. It is required to take measures on the gaming machine side.

In order to make it difficult to predict a random value acquired at the time of lottery, attempts have been made to give fluctuation to a random number generated by a random number generator or a random value extracted from a random number generator. The prior arts related to random number fluctuations include the following.
A frequency dividing circuit for switching the frequency of a random number clock signal input to a random number counter is incorporated in a lottery means for performing a lottery for winning a slot machine. As the frequency switching of the random number clock signal, the random number is selected by random numbers, or when the insertion of a medal is detected at the start and end of each fixed timer interrupt processing, the start lever is operated and the latch signal is Immediately after the input to the latch circuit, and when the first stop button, the second stop button, and the third stop button are operated, the switching is performed. JP, 2005-87620, A Random value is output from the random number generation circuit by the start operation of the game, and a random number lottery signal output to the random number generation circuit by the start operation is output a plurality of times. . As a result, different random numbers can be drawn depending on the acquisition timing of the random values, and even if the start operation is performed in accordance with the random number count cycle, the random values vary. JP 2004-321773 A JP, 2005-7139, A Game machine provided with a prize lottery means which performs lottery based on the signal of the predetermined switch which a player operates, and makes a prize judgment based on the lottery result, The prize lottery means It includes a fluctuation generator that receives a signal, adds the fluctuation to the signal, and outputs the fluctuation. The winning lottery means performs a lottery based on the output of the fluctuation generator. Since the start switch operation timing does not coincide with the lottery timing, the lottery result cannot be predicted.

By the way, in recent years, RFID (Radio Frequency Identification, hereinafter referred to as “RFID”) capable of reading identification information (data) such as an ID code without contact is becoming widespread. Some RFIDs are further writable. Techniques have been proposed in which the RFID is used in the field of gaming machines, for example, for identification of gaming media (medals). There are the following prior arts that disclose the incorporation of an RFID into a medal.
JP, 2002-17960, A Using a special medal that can be marked by a marking means and readable by a marking reading means as a game medal, and marking in the path from medal insertion to medal payout to a gaming machine There is provided a medal detection device having at least one of the means and the marking reading means. An electromagnetic induction type ID system is used as a marking technique. JP, 2005-253945, A Data storage means composed of a coil and an IC module is embedded in the medal, and a data receiving device for receiving a signal from the medal is provided in the medal selector. Information on the number of medals is read, and a game is played according to the number information read by the data receiving device. JP, 2005-245853, A There is provided a medal counting device which prevents improper act by a player. When the authentication medal is inserted into the insertion slot, the medal counting device reads the authentication data from the RFID tag attached to the authentication medal via the antenna, and the control unit identifies whether the authentication data is appropriate. The medal is not counted unless the authentication data is identified as appropriate. Therefore, only a person who has an authentication medal can use the medal counting device, so that an illegal act by a player can be prevented. An IC chip and a transmission / reception antenna are enclosed in a part of a medal to obtain an RFID medal. When the RFID medal is inserted into the pachislot machine, the pachislo machine reads the ID data stored in the IC chip, and if the ID number based on the ID data matches a predetermined winning ID number, a predetermined number (for example, 50 medals) are awarded to the player. JP, 2002-177626, A It distinguishes easily that the medal of another game hall was brought in. The game medal is composed of an IC chip with a built-in antenna that incorporates an antenna coil and a resin portion that surrounds the entire outer periphery of the IC chip 3. The IC chip is operated by electrical energy transmitted from a dedicated reader / writer by an electromagnetic coupling method, and can transmit data to and from the reader / writer. An IC chip EEPROM stores an identification code representing a specific game arcade, and the reader / writer can read / write the identification code. A reader is built in the gaming machine and the medal counter, and the identification code is read out from the gaming medal, and the gaming medal is accepted only when the proper identification code is read out. JP, 2006-122444, A The additional value information given separately from the essential value information of a game medal is changed. In the IC medal lending device, the number of additional credits provided separately from the essential number of credits per medal of IC medals for gaming, that is, additional value data is determined by lottery and incorporated in the IC medals for gaming Is written in the additional value data storage area of the electronic tag. On the other hand, when the game IC medal paid out from the IC medal lending device is inserted, the medal acceptance device reads the additional value data and transmits it to the satellite main body.

  An object of the present invention is to provide a novel technique for making it difficult to predict a random value acquired at the time of lottery, which is different from those described in Patent Documents 1 to 4 described above. In particular, it is an object of the present invention to provide a gaming machine, a gaming machine fraud prevention method, and a program that can prevent cheating by a sensory device.

  The feature is that the data is read from the RFID of the inserted medal on the premise that the RFID is built in the medal (game medium) used for the game, and the random number value is generated by using the data. It is in the point that makes prediction difficult. Such a technique is not disclosed at all in the above prior arts 5 to 10.

This invention is a gaming machine comprising a winning lottery means for performing a lottery based on a signal from a predetermined switch and performing a winning determination based on a result of the lottery.
Provided with a communication device that communicates with the RFID provided in the game medium put in to play the game,
The winning lottery means includes a random number generator for generating random numbers for lottery, a random number extractor for extracting random numbers generated by the random number generator based on the signal of the switch, and data read from the RFID by the communication device Is combined with the value extracted by the random number extractor and output as a random value, a winning determination table that pre-stores the correspondence between the random value related to the lottery and winning, and the combining with reference to the winning determination table And a determination unit for determining whether or not the random number output from the unit is won or at least one of the types of winning.

  The combining unit performs, for example, adding, subtracting, logical sum, logical product, or exclusive logical sum of data read from the RFID by the communication device and a value extracted by the random number extractor. Generate a random value.

  The synthesizing unit stores at least one random number value generated in the past, for example, addition of the stored random number value, data read from the RFID by the communication device, and a value extracted by the random number extractor The random value is generated by performing any one of subtraction, logical sum, logical product, logical product, and exclusive logical sum.

This invention is a gaming machine comprising a winning lottery means for performing a lottery based on a signal from a predetermined switch and performing a winning determination based on a result of the lottery.
Provided with a communication device that communicates with the RFID provided in the game medium put in to play the game,
The winning lottery means includes a random number generator for generating a random number for lottery based on data read by the communication device, a random number extractor for extracting a random number generated by the random number generator based on a signal of the switch, and a lottery A winning determination table that pre-stores the correspondence between the random number value and the winning according to the win, and determines whether or not the random number extracted by the random number extractor is winning or winning type with reference to the winning determination table And a determination unit.

  The communication device outputs, for example, the RFID data read using a signal from the predetermined switch as a trigger.

  For example, the communication device stores a plurality of data read from each of the RFIDs of a plurality of game media, and outputs data obtained by combining the plurality of read data when the predetermined switch is operated.

The communication device has a function of writing data to the RFID,
The communication device may store a part of the random number generated by the random number generator, read the data from the RFID, and then write the stored random number to the RFID.

The communication device has a function of writing data to the RFID,
The communication device stores a plurality of data read from each of the RFIDs of a plurality of game media, reads data from the RFID different from the plurality of game media, and then combines the data based on the plurality of data May be written in the RFID.

It includes a medal passage that rolls medals from the medal insertion port to the medal discharge port, and has a medal selector that selects and sends out the inserted medals.
The communication device includes a receiving antenna for reading data from the RFID, and a transmitting antenna for writing data to the RFID,
The receiving antenna is provided, for example, on the upstream side of the medal passage from the transmitting antenna.

The present invention is a method for preventing fraud in a gaming machine that performs a lottery based on a signal from a predetermined switch and performs a winning determination based on a result of the lottery,
Generating random numbers for lottery;
Extracting the generated random number based on the signal of the switch;
Communicating with an RFID provided in a game medium input to play a game, and reading data from the RFID;
Combining the data read from the RFID with the extracted value to obtain a random value;
And a step of determining at least one of the winning type or the winning type of the synthesized random number value with reference to a winning determination table that stores in advance the correspondence between the random value related to the lottery and the winning.

The present invention is a method for preventing fraud in a gaming machine that performs a lottery based on a signal from a predetermined switch and performs a winning determination based on a result of the lottery,
Generating random numbers for lottery;
Extracting the generated random number based on the signal of the switch;
With reference to a winning determination table that pre-stores the correspondence between the random value related to the lottery and the winning, and determining at least one of the winning type or the winning type of the extracted random value;
Communicating with an RFID provided in a game medium input to play a game, and reading data from the RFID;
And a step of changing a random number sequence generated based on the read data.

The present invention is a program for causing a computer to execute the above method.
The program according to the present invention is recorded on a recording medium, for example.
Examples of the medium include EPROM devices, flash memory devices, flexible disks, hard disks, magnetic tapes, magneto-optical disks, CDs (including CD-ROMs and Video-CDs), DVDs (DVD-Videos, DVD-ROMs, DVD-s). RAM), ROM cartridge, RAM memory cartridge with battery backup, flash memory cartridge, nonvolatile RAM cartridge, and the like.

  A medium is a medium in which information (mainly digital data, a program) is recorded by some physical means, and allows a processing device such as a computer or a dedicated processor to perform a predetermined function. is there.

  According to the present invention, fluctuation is generated in the random value acquired based on the data read from the RFID provided in the game medium, so that the prediction can be made difficult. As a result, it is possible to reduce the possibility of giving a profit to the fraud using the sensory device, and to suppress the fraud.

Embodiment 1 of the Invention
A gaming machine according to Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a gaming machine (also called a slot machine or a revolving gaming machine).
A player who wants to enjoy a game with the slot machine 10 first borrows a medal as a game medium from a medal lending machine (not shown) or the like, and inserts a medal directly into the medal insertion slot 100 of the medal insertion device. The medal slot 100 is provided at a substantially central height in front of the slot machine 10.

  The slot machine 10 has a square box-shaped housing 11. A square window-like display window 12 facing the player side is formed in the central part and the upper part of the casing 11, respectively. A symbol display window 13 through which the symbols 61 of the three rotary reels 40 can be seen is formed slightly to the left of the center display window 12. The bet switch 16 is a switch located below the rotary reel 40, and reduces the number of stored medals inserted and stored in the medal insertion slot 100 to replace the medal insertion. The settlement switch 17 is a switch located obliquely below the rotating reel, and pays out the stored inserted medal. The start switch 30 is a lever located obliquely below the rotary reel 40 and starts driving the reel unit 60 on condition that a game medal is inserted or a bet switch 16 is inserted. The stop switch 50 is for stopping the driving of the reel unit 60. The reel unit 60 is composed of three rotating reels 40. Each rotating reel 40 includes a rotating drum made of a synthetic resin and a tape-like reel tape 42 attached around the rotating drum. On the outer peripheral surface of the reel tape 42, a plurality of (for example, 21) symbols 61 are displayed. Reference numeral 62 denotes a liquid crystal display unit for performing various effects.

  Inside the slot machine 10 is incorporated a main board 1 which is a control device for controlling the overall operation of the slot machine 10 (details of the main board 1 will be described later). The main board 1 is configured around a CPU and includes a ROM, a RAM, an I / O, and the like. The CPU is operated by reading a program stored in a ROM (storage unit) in response to the player's operation. Specifically, the rotary reel 40 is operated based on the operation of the start switch 30 and the stop switch 50. And the display of lamps and speakers are controlled. Temporary data required when the CPU operates is a RAM (storage unit: RAM is generally a volatile memory, and data is lost in principle when the power is cut off. A backup power source such as a battery may be prepared. In this case, data is not lost even if the power is cut off). The CPU performs a predetermined operation in accordance with a program recorded in the ROM, records temporary data necessary for processing in the RAM, and reads out and refers to the recorded data as necessary.

  The start switch 30 is a lever that is positioned obliquely below the rotary reel 40 as described above. The start switch 30 can be obtained on the condition that a game medal is inserted or the bet switch 16 is inserted or according to a winning determination. "Replay)" is to start driving the reel unit 60 on condition that a predetermined time has elapsed since the previous game.

  The stop switch 50 is for stopping the driving of the reel unit 60 as described above. Specifically, the stop switch 50 includes three switches corresponding to each rotary reel 40, and one stop switch 50 is disposed below each rotary reel 40. The operation of the stop switch 50 corresponding to the rotating reel 40 is set to stop the rotation of the corresponding rotating reel 40.

  When the start switch 30 is operated on the condition that a medal is inserted or the bet switch 16 is pressed, or on the condition that a predetermined time has elapsed from the previous game at the time of the “replay”, the reel unit 60 is driven, and the three The rotary reel 40 starts to rotate. Thereafter, when one of the stop switches 50 is operated, the rotation of the corresponding rotary reel 40 is stopped. When all three stop switches 50 are operated, the rotation of the three rotary reels 40 is stopped. At this time, when a predetermined symbol 61 on the effective pay line of the display window 13 stops, it is determined that the winning is made, and a predetermined number of medals are paid out through a hopper unit (not shown). In addition, you may credit instead of paying out medals.

  When the main board 1 controls the rotation and stop of the rotary reel 40 based on the operation of the start switch 30 and the stop switch 50, it is determined whether or not a winning qualification is obtained based on a predetermined internal lottery probability. Including a winning lottery means 1a for performing a lottery (details will be described later). A winning flag is established when the internal lottery result by the winning lottery means 1a is a winning, and on the condition that the combination of the stopped symbols of the rotating reel 40 matches a predetermined winning symbol while the winning flag is established. The winning is confirmed, and the player is given a medal payout or a special game advantageous to the player.

FIG. 2 is a block diagram showing an electrical schematic structure of the slot machine 10. In this figure, the display about the power supply system is omitted. The slot machine 10 includes a main board 1 and a sub board 2 that operates in response to a command from the main board 1 as main components.
The aforementioned winning lottery means 1a is provided on the main board 1.
At least the main substrate 1 is accommodated inside the case so that it cannot be contacted from the outside, and a sealing process is performed so that traces remain when the substrates are removed.

  The main board 1 is for performing an internal lottery in response to a player's operation, and processing such as reel rotation / stop and medal payout. The main board 1 includes a CPU that performs a control operation according to a preset program, a ROM that is a storage unit that stores the program, and a RAM that temporarily stores processing results and the like.

  The sub-board 2 is for receiving a command signal from the main board 1 and notifying the result of the internal lottery and performing various effects. The sub-board 2 includes a CPU that performs a control operation according to a preset program corresponding to the command signal, a ROM that is a storage unit that stores the program, and a RAM that temporarily stores processing results and the like.

  The sub-board 2 receives a command from the main board 1 and performs processing such as rendering according to the command. The flow of commands is only one from the main board 1 to the sub board 2, and conversely, no command or the like is issued from the sub board 2 to the main board 1.

The main board 1 includes a start switch 30, a stop switch 50, a reel drive unit 70, a reel position detection circuit 71, a hopper drive unit 80, a hopper 81, and a medal detection unit for counting the number of medals paid out from the hopper 81. 82 is connected. Further, a communication device 7 for communicating with the medal RFID is connected. In FIG. 2, the communication device 7 is arranged outside the main board 1, but can be built in the main board 1. As will be described later, the antenna of the communication device 7 can be installed separately (for example, the antenna is arranged in the medal path P of the medal selector SEL, and other elements of the communication device 7 are provided on the main board 1). As long as the communication device 7 performs the function of communicating with the RFID and sending the data to the winning lottery means 1a, the installation location is not limited. In the following description, the installation location of the communication device 7 is not specified.
A peripheral substrate (local substrate) such as a control substrate 200 of the liquid crystal display unit 62, a speaker 201, and an LED substrate 202 is connected to the sub substrate 2.
Hereinafter, these peripheral substrates / devices except for the start switch 30 and the stop switch 50 will be described.

  The reel driving unit 70 is a circuit that drives a stepping motor (not shown) that rotationally drives the three reels 40. Each stepping motor is subjected to 1-2 phase excitation by the reel drive circuit 70 and rotates once when a drive signal having a predetermined number of pulses is supplied.

  The reel position detection circuit 71 is provided in the vicinity of the reel 40, receives an output pulse signal from a photo interrupter (not shown) for detecting the rotation position of the reel 40, detects the rotation position of each of the three reels 40, and detects it. A signal is output. A photo interrupter (not shown) detects a shielding plate provided on each reel 40 and generates a reset pulse every time each reel 40 rotates once. This reset pulse is given to the CPU of the main board 1 via the reel position detection circuit 71. In the RAM of the main board 1, a count value corresponding to the rotation position within one rotation range is stored for each reel 40, and when the CPU receives the reset pulse, the count value formed in the RAM is stored. Clear to “0”. By this clearing process, the deviation generated between the movement display of each symbol and the rotation of each stepping motor is eliminated every rotation.

  The hopper driving unit 80 is a circuit that drives a motor of a hopper 81 that stores medals and pays out the number of medals corresponding to the designated winning.

  The medal detection unit 82 is for counting the number of medals paid out from the hopper 81. The CPU of the main board 1 stops the driving by the hopper driving unit 80 when the medal count value actually paid out received from the medal detection unit 82 reaches predetermined payout number data corresponding to the winning. Finish paying out. The hopper drive unit 80 and the medal detection unit 82 pay out a predetermined number of medals to the player based on a winning obtained as a result of the game.

The liquid crystal control board 200 is a circuit for driving the liquid crystal display unit 62.
The speaker 201 is for generating sound such as voice and sound effects.
The LED substrate 202 is a circuit for driving a display lamp and a back lamp (not shown).

  The liquid crystal display unit 62 controlled by the liquid crystal control board 200 and the LED board 202 including the speaker 201 and the display lamp constitute an effect display device. This effect display device is for notifying a player of a prize or the like, or for teaching a user a specific small role during a certain game with some action during a so-called assist time (AT).

  The communication device 7 communicates with the RFID built in the medal (game medium) to receive data and sends the received data to the winning lottery means 1a. The winning lottery means 1a adds fluctuation to the random number based on the received data. This process will be described in detail later. In FIG. 2, the communication device 7 is provided outside the main substrate 1. However, as described above, a part of the communication device 7 may be provided inside the main substrate 1. For example, only the antenna of the communication device 7 may be provided outside the main board 1 and other elements may be provided inside the main board 1.

  The ROM of the main board 1 stores game processing procedures executed in the slot machine 10 as a sequence program, and stores a winning probability table, a symbol table, a winning symbol combination table, and the like. Has been. The winning probability table is divided so that the random number values extracted by the random number generator (random number generator and random number extractor described later) are divided into each winning mode, and a certain range of numerical values generated by the random number generator. Data for dividing the random number extracted from the inside into each winning mode is stored. That is, the winning probability table has an area divided for each winning mode corresponding to the entire area of random numbers taken by the random number generator. For example, a range of 0 to a certain number is divided into a plurality, one division (region) is excluded, and the other division (region) is set as winning 1, winning 2,.

  The random number generator has a random number generation function that generates pseudo random numbers by rapidly updating numerical values in a certain range, and a sampling function that extracts an arbitrary random number value from the generated random numbers in response to the player's operation. It is to be prepared. As a specific example, it is composed of a counter and a latch. In this specification, “random number” means the whole series of values generated by the random number generator, and “random number” means any value arbitrarily extracted from the series of random numbers. And For example, when the random number generator generates arbitrary numerical values such as r1, r2, r3, r4, r5,..., The whole of r1, r2, r3, r4, r5,. (To be precise, a random number sequence), and a sampled value (for example, r3, usually one value is extracted) is a random value. In the following description, “random number value” is also referred to as “random number data”.

  The extracted random number data is collated with each of the winning determination area data divided for each winning mode in all areas corresponding to the random number generated from the random number generator, and the extracted random data is assigned to the winning mode to which the extracted random number data belongs. The corresponding winning is determined. For example, it is determined which category (region) in the winning probability table the extracted random number value belongs to, and if the category is, for example, a category of winning 1, it is determined as “winning 1”. Similarly, if the extracted random number value belongs to a category (area) that is out of the winning determination table 6, it is determined as “out”. For example, when the evaluation of the lottery process is out of place, it is set so that the predetermined symbols are not aligned (so-called kicking), and when winning, the predetermined symbols are aligned on the condition that the stop switch is pressed at a predetermined timing. (So-called pull-in). And if predetermined symbols are prepared, medals corresponding to winning symbols are paid out. Various winnings occur under the probability according to the data setting of the winning probability table, and the symbol stop control is performed. For example, the business hours of the day are not affected by the skill of the player. The total medal payment rate is maintained almost constant.

  As described above, the ROM of the main board 1 stores a program, a winning probability table, a symbol table, a winning symbol combination table, and the like, which are collectively referred to as being stored in the ROM. This is called ROM data. Alternatively, they may be collectively referred to as program data in terms of a program for causing the CPU to perform an operation for control processing and data related thereto.

FIG. 3 is a block diagram of the winning lottery means 1a according to the first embodiment of the invention. In FIG. 3, the communication device 7 is displayed for convenience of explanation, but the communication device 7 is not included in the winning lottery means 1a. Needless to say, the communication device 7 may be included in the winning lottery means 1a.
At least some of the functions of the winning lottery means 1a (for example, the determination unit 5 and the winning determination table 6) are realized by executing the program stored in the ROM of the main board 1 by the same CPU or by hardware such as an IC. Is done. As shown in FIG. 3, the winning lottery means 1a includes a random number generator 3, a random number extractor 4, a determination unit 5, and a winning determination table 6. The random number generator 4 and the random number extractor 5 constitute a random number generator.

  The winning lottery means 1a of the slot machine according to the first embodiment of the invention further includes a synthesis unit that synthesizes data read from the RFID of medals by the communication device 7 with a random value output from the random number extractor 4. Fluctuation is given to the random number value by the synthesis processing by the synthesis unit 8.

  Specifically, the synthesis process is, for example, a process of adding data and a random value, a process of subtracting data from the random value, and a process of obtaining a logical sum, a logical product, or an exclusive logical sum of the two. The data read from the RFID of the medal is a code such as a unique identification code and may not be a numerical value, but even in such a case, such a code (for example, an ASCII code indicating an alphabet) is binary. Therefore, the sign can be handled as a numerical value by processing the digital data as a value as it is. Alternatively, the correspondence between the code and the numerical value may be determined in advance, and the code may be converted into a numerical value. In Embodiment 1 of the present invention, the data read from the RFID of the medal by the communication device 7 is used to give fluctuations to the random number value, so long as the data is different for each medal. Various methods (calculations, algorithms, etc.) can be adopted.

  Further, the random number value used in the previous lottery is stored in the synthesizer 8, and the random number value extracted by the random number extractor 4 this time and the data read from the RFID of the medal are added (or one) (or Subtraction). For example, each time the start switch 30 is pressed, the synthesizer 8 repeatedly generates a random number value, which is R (1), R (2), R (3),..., R (n−1), R (n),..., R (n) is a random value generated at the nth time, A is a random value extracted by the random number extractor 4, and B is data read from the RFID of the medal. Then, based on the equation R (n) = R (n−1) + A + B, the synthesis unit 8 may generate a random value. R (n−1) is a random number value generated immediately before the current random number value R (n) and used for the lottery. R (1) is a random value generated first after the slot machine is powered on.

  It is possible to play a game without inserting medals by pressing the bet switch 16 or winning the replay. In this case, a random value is generated without using the data B read from the RFID (for example, , R (n) = R (n-1) + A).

  The random number generator 3 generates a random number for winning lottery within a predetermined area. For example, a counter that receives a clock signal and generates an arbitrary numerical value with a predetermined probability in a range of 0 to a certain number (for example, 0000 to FFFF (hexadecimal)) according to the clock signal. FIG. 10B shows an example of input / output terminals of the counter. Although this figure shows a 4-bit counter IC, the same applies to an 8-bit counter.

  The random number extractor 4 extracts a random number generated by the random number generator 3 at the timing of a predetermined switch operation (for example, operation of the start switch 30). The random number generator 3 repeatedly generates random numbers at predetermined intervals, and a part of them is extracted by the random number extractor 4.

  The winning determination table 6 has an area divided for each winning mode corresponding to the entire area of random numbers taken by the random number generator 3. For example, a range of 0 to a certain number is divided into a plurality, one division (region) is excluded, and the other division (region) is set as winning 1, winning 2,.

  The determination unit 5 refers to the extracted random number data extracted by the random number extractor 4 with the lottery probability data in the winning determination table 6. That is, the extracted random number data is collated with each of the winning determination area data divided for each winning mode in the entire random number region taken by the random number generator 3, and the winning corresponding to the winning mode to which the extracted random number data belongs is determined. To decide. For example, it is determined which category (region) of the winning determination table 6 the extracted random number value belongs to, and if the category is, for example, a category of winning 1, it is determined as “winning 1”. Similarly, if the extracted random number value belongs to a category (area) that is out of the winning determination table 6, it is determined as “out”.

  For example, when the evaluation of the lottery process is out of place, it is set so that the predetermined symbols are not aligned (so-called kicking), and when winning, the predetermined symbols are aligned on the condition that the stop switch is pressed at a predetermined timing. (So-called pull-in). And if predetermined symbols are prepared, medals corresponding to winning symbols are paid out.

  4A is a front view of a medal M to be used in the slot machine according to the embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along the line AA. As shown in these figures, an RFID is embedded in the medal M.

  RFID (Radio Frequency Identification) is a type of electronic tag that has electronic information inside and identifies an object by communicating with a reader using radio waves. In general, an RFID includes an antenna, a wireless circuit, a processing circuit for storing and reading information, and a memory for storing information. Various names are used for RFID, such as mobile object identification devices, remote IDs, IC tags, ID tags, RF tags, wireless tags, electronic tags, and transponders. I will call it.

  The RFID is a responder including an integrated circuit (including a storage unit), a wireless circuit, and an antenna. As an interrogator corresponding to this, for example, there is a reading / writing device (also referred to as “RFID reader / writer”) for reading information from and writing information to RFID. In this specification, the communication device 7 corresponds to the reading / writing device. Note that the communication device 7 according to the embodiment of the present invention requires a read function, but a write function is not essential (an example of using the write function will be described later). As a method for non-contact communication by RFID, electromagnetic coupling type / electromagnetic induction type that uses mutual induction of coils by 13.56 MHz AC magnetic field, and microwave that transmits / receives by 2.45 GHz microwave There is a type.

  Although not shown in the figure, an integrated circuit (processing unit, specifically a CPU) including a storage unit, a radio circuit, and an antenna are embedded in the medal. The communication device 7 is configured to be able to read at least data stored in the storage unit. The data stored in the storage unit is information indicating the value of a medal or identification information of the medal (for example, hole ID, medal serial number, date time information, etc.), and the storage unit is different for each medal. It is assumed that unique data is stored.

  The medal storage unit may be anything as long as the stored data does not disappear. For example, the medal storage unit includes a nonvolatile semiconductor storage element such as a mask ROM, PROM, EPROM, EEPROM, flash memory, or a magnetic storage medium. The In addition, a volatile semiconductor memory element can be used as long as the battery built in the game medal can hold memory for a long period of time with no practical problem. Of these, storage means capable of rewriting data is preferable in that data can be updated as necessary. If an electrically rewritable EEPROM or flash memory is provided, dedicated writing is possible. Data can be rewritten relatively easily using the device.

  The specific structure of the processing unit, radio circuit, and antenna inside the medal is not particularly limited, and all functions may be integrated on one chip, or some functions (for example, processing unit and storage unit) ) May be constituted by another chip.

  By using the RFID, there is no need for a contact for connecting to the data reading means side so that data communication is possible, so that problems such as contact failure do not occur. In addition, since the power necessary for operating the IC chip can be supplied from the data reading means side by a method such as an electromagnetic induction method or an electromagnetic coupling method, a battery is not required on the IC chip side in this case. There is no need for maintenance of game medals.

  FIG. 5 shows a block diagram of the communication device 7. The communication device 7 transmits a radio wave corresponding to the RFID of the medal M via the antenna 71 and the wireless circuit 72. When the medal M passes near the antenna 71, the processing unit 73 performs data communication with the RFID attached to the medal M and receives data recorded in the RFID. The received data is sent to the combining unit 8 of the winning lottery means 1a through an input / output circuit (I / O) 74. As shown in FIG. 5B, the transmitting antenna 71T and the receiving antenna 71R may be separated.

  Since the communication device 7 reads data from the RFID of the medal inserted from the medal slot 100, the communication device 7 (at least its antenna 71) is provided on the medal slot 100 or a path along which the inserted medal moves. Is preferred. For example, the antenna 71 is provided in the medal passage P of the medal selector SEL as shown in FIG. The medal selector SEL rolls the medal toward the hopper device 81 while detecting the passage of the medal M inserted from the medal insertion slot 100. In the middle of the process, different diameter medals whose outer diameter is different from a predetermined dimension, and illegal medals made of iron or an iron alloy are excluded.

  A brief description of the medal selector is added. FIG. 6 is a perspective view of the medal selector SEL provided in the slot machine. SEL is a medal selector, P is a medal passage provided therein, OUT is a medal outlet of the medal selector SEL, and S1 and S2 are photointerrupters (sensors for medal detection) provided in the medal passage P. M indicates the inserted medal. The medal selector SEL is provided inside the slot machine 10 and below the medal slot 100. The medal M inserted from the upper part of the medal selector SEL falls along the medal passage P, and the traveling direction is changed to a slant sideway in the middle, and is discharged from the medal outlet (medal discharge port) OUT. Note that irregular medals of different sizes fall in the middle of the medal passage and return to the medal return slot.

  In the vicinity of the medal exit OUT, two medal counting sensors S1 and S2 are provided along the advancing direction of the medal. These are for counting the number of medals. The medal counting sensors S1 and S2 have, for example, a light emitting portion and a light receiving portion that face each other and are formed in a U-shaped cross section, and the photo interrupter is positioned with the detection optical axis facing the medal path P from above. It is. Output signals of medal counting sensors S1 and S2 for medal counting provided in the medal selector SEL are input to the main board 1.

In FIG. 6, the antenna 71 is provided on the upstream side of the medal passage P (below the medal slot 100) or on the downstream side (near the medal counting sensors S1 and S2). If the antenna 71 is provided on the upstream side, the RFID of the medal M can be read before the medal counting sensors S1, S2 detect the medal M. If the antenna 71 is provided on the downstream side, the RFID of the medal M can be read simultaneously with the detection of the medal M by the medal counting sensors S1, S2. In this case, the RFID of the inserted medal M can be read reliably, and other medals (for example, a medal before being placed near the medal slot 100, a medal already inserted in the hopper 81) are erroneously inserted. Reading RFID can be prevented.
In addition, when writing the RFID of the medal M, it is preferable to provide the receiving antenna 71R on the upstream side, provide the transmitting antenna 71T on the downstream side, perform reading on the upstream side, and write on the downstream side ( (See the symbol in parentheses in the figure). Since it takes time for the medal M to move from the position of the upstream antenna 71R to the position of the downstream antenna 71T, RFID write data can be prepared during that time. In short, the positional relationship between the receiving antenna 71R and the transmitting antenna 71T in the medal path P only needs to be positioned upstream of the medal path P from the antenna 71T. By adopting such a positional relationship, it is possible to prevent the contents from being rewritten before reading the RFID of the medal M.

  Next, the internal lottery process of the slot machine according to Embodiment 1 of the present invention will be described with reference to the flowchart of FIG. FIG. 7 shows a case where medals are inserted prior to the game. The game can be started without inserting medals by operating the bet switch 16, but the internal lottery process in this case is the same as in the case of the conventional slot machine, and the description thereof is omitted.

S1: It is determined whether or not a medal M has been inserted.
S2: When a medal M is inserted (YES in S1), the communication device 7 communicates with the RFID of the medal M and acquires the data.
The processes of S1 and S2 are necessary for using the inserted medal M for fluctuation. Whether or not the medal M has been inserted is determined by whether or not an RFID response has been received by the antenna 71 or whether or not the medal M has been detected by the medal counting sensors S1 and S2. The former is suitable when the antenna 71 is provided upstream of the medal passage P, and the latter is suitable when the antenna 71 is provided downstream of the medal passage.

S3: It is determined whether or not the start switch 30 has been pressed.
S4: When the start switch 30 is pressed (YES in S3), the random number extractor 4 latches the output of the random number generator 3 to acquire a random value.

S5: The acquired random number value is combined with the data read from the RFID of the medal.
For example, the following processing is performed.
・ Add data and random value.
・ Subtract data from random values. Or conversely, a random value is subtracted from the data.
・ Calculate logical sum, logical product or exclusive logical sum of data and random value.
-You may make it refer to the last random value. For example, when R (n) is a random value generated at the nth time, A is a random value extracted by the random number extractor 4, and B is data read from the RFID of a medal, R (n) = R (n -1) Based on the expression + A + B, the synthesis unit 8 generates a random value.

S6: A lottery is performed based on the synthesized value (random value). Since this process is the same as in the case of the conventional slot machine, its description is omitted.

  If at least one medal is inserted, the processing of FIG. 7 can be performed. When a plurality of medals are inserted, for example, the following processing is performed.

(1) Using the time point when the start switch 30 is operated as a reference, the RFID data read immediately before (the data read last) is used. For example, assuming that RFID data is stored in a storage unit (RAM) (not shown), each time the RFID data is read, it is stored (overwritten) at a specific address in the storage unit. When the start switch 30 is operated, the contents of a specific address in the storage unit are read and used as random number fluctuations. If it demonstrates in connection with FIG. 7, whenever the medal M is inserted, the process of S1 and S2 will be repeated.

(2) Using the RFID data read immediately after the start switch 30 was previously operated as a reference (first read data). For example, a specific address of the storage unit can be written when the start switch 30 is operated, and writing of the address is prohibited after data is written once. Referring to FIG. 7, the process of S1 is started by operating the start switch 30, and immediately after the start switch 30 is operated, the processes of S1 and S2 are executed only once. Become.

  The above (1) and (2) are for outputting the RFID data read by the communication device 7 before or after the operation of the start switch 30 based on the operation timing of the start switch 30.

(3) A combination of all or part of a plurality of RFID data read between the time when the start switch 30 was operated last time and the time when it was operated this time is used. For example, an average value or a total value of a plurality of data is used. An exclusive OR may also be obtained. In this case, a plurality of RFID data is combined between S2 and S3 in FIG. After synthesizing, the stored RFID data is cleared, and then the read RFID data is sequentially stored. When the start switch 30 is operated, the stored plurality of data is synthesized. Repeat the process.

  In (3) above, when a plurality of medals are inserted, the communication device 7 stores a plurality of data read from a plurality of RFIDs, and the plurality of data read when the start switch 30 is operated. Are combined and output.

  Note that RFID write processing may be performed. The RFID stores data for fluctuation, but the data for fluctuation needs to be different for each medal. Furthermore, it is preferable to change after it is read once and used as fluctuation. Therefore, for example, the following processing is performed.

(A) Write a random value to the RFID. For example, random numbers generated by the random number generator 3 are extracted at an arbitrary timing (for example, detection timings by the medal counting sensors S1 and S2), and the extracted random numbers are written.

(B) A combination of a plurality of RFID data read from a plurality of medals is used. For example, a predetermined number (for example, 10) of data is stored in advance, and an average value or a total value of a plurality of stored data is used. The oldest data may be overwritten with the latest data, and the latest data may be combined. For example, the average may be obtained using known method of moving averages. In order to synthesize two pieces of data, for example, when the latest read data is C (n), the data read before that is C (n-1), and the total value of the data is W (n), W (n) = C (n) + C (n−1) is written in the RFID of the medal. Alternatively, the difference D (n) may be obtained. For example, D (n) = C (n) −C (n−1).

The write process (a) or (b) is executed, for example, between S2 and S3 in FIG.
Note that how the RFID built-in medals used in the slot machine according to Embodiment 1 of the present invention are circulated in the hall will be briefly described with reference to FIG. The arrows in the figure indicate the flow of medals M.

  As described above, the slot machine 10 is provided with the communication device 7, but the medal exchange B and the medal lending machine C are also provided with the same RFID reader / writer (not shown). When the medal lending machine C lends the medal M, predetermined information (for example, hole identification information, date / time information, management information indicating the number of medals, etc.) is written in the RFID of the medal M. In the medal exchange B, the medal M paid out from the slot machine 10 and the medal M lent out from the medal lending machine C are identified and counted based on the data read from the RFID. Also, a part of the management information of the medal M that has passed the medal exchange B (for example, date / time information, management information indicating the number of medals, etc.) is deleted.

  The slot machine 10 determines whether or not the medal M is legitimate based on the RFID data. When it is determined that the medal M is not legitimate, the medal M is returned, or a predetermined warning sound is generated, or the main hall You may make it report to a computer.

  According to the first embodiment of the present invention, the random number value is fluctuated by synthesizing the RFID data of the inserted medal with the extracted random number value, so that it is difficult to predict the extracted random value. . As a result, it is possible to reduce the possibility of giving a profit to the fraud using the sensory device, and to suppress the fraud.

Embodiment 2 of the Invention
In the first embodiment of the present invention, the random number is fluctuated by combining the data read from the RFID of the medal with the extracted random number value. In the second embodiment of the invention, random numbers are generated based on the data read from the RFID of the medal, in other words, by changing the sequence of random numbers generated according to the data read from the RFID, the random number fluctuates. Is to give.

  FIG. 9 is a block diagram of the winning lottery means according to the second embodiment of the invention. In this figure, the same or corresponding parts as those shown in FIG.

  The data read from the RFID of the medal by the communication device 7 is sent to the random number generator 3 as a so-called random number seed (value for changing the random number series), and a new series of random numbers is generated based on this. If the random number series is changed, the regularity of the random numbers is lost, and it is difficult to predict the extracted random number values. As a result, it is possible to reduce the possibility of giving a profit to the fraud using the sensory device, and to suppress the fraud.

  As a method of changing the random number sequence generated based on the seed of the random number, there is a method of performing calculation based on a well-known formula. Here, a method of changing the initial value of the counter which is the random number generator 3 will be described.

  The random number generator 3 receives a clock signal as shown in FIG. 10, for example, and generates an arbitrary numerical value with a predetermined probability in a range of 0 to a certain number (for example, 0000 to FFFF (hexadecimal)) according to the clock signal. It is a counter. FIG. 10B shows an example of the input / output terminal of the counter. Although this figure shows a 4-bit counter IC, the same applies to an 8-bit counter.

  The random number generated by the random number generator 3 when no data is read from the RFID of the medal by the communication device 7 is between 0000 and FFFF (hexadecimal) as shown in FIG. Change and it is repeated with a constant period T.

  On the other hand, when the data is read from the RFID of the medal by the communication device 7, the random number sequence is changed in the middle, so that the random number periodicity is lost. For example, it is assumed that the communication device 7 reads data from the RFID of a medal and the random number seed output by the communication device 7 is read (preset) by the random number generator 7 at time t1. Specifically, RFID data from the communication device 7 is input to the preset input terminal and read into the random number generator 7. Then, as shown in FIG. 11B, the random number generator (counter) 7 changes discontinuously at time t1. Y indicates the seed value of the random number (initial value of the random number), and X indicates the random value immediately before the change of the random number series.

  Therefore, according to the second embodiment of the present invention, even if the random number of the slot machine is regularly repeated at a fixed period T, the random number seed is given in the middle and the random number sequence is changed. It is very difficult to predict a random value at such timing. Therefore, it is possible to prevent a desired random number value from being obtained using the sensation device and to deter fraud.

  In order to change the random number series, the initial value of the random number generator 7 is changed based on the RFID data. However, the clock frequency of the random number generator 7 may be changed based on the RFID data. For example, a first clock signal and a second clock signal having different frequencies are prepared, and the random number generator 7 is operated by the first clock signal when the RFID data is odd, and the random number is generated by the second clock signal when the RFID data is even. The device 7 is operated. Since the generation period of random numbers is changed by switching the clock, it is very difficult to predict a random value at any timing.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

It is a front view of a gaming machine (slot machine). 1 is a block diagram of a gaming machine according to an embodiment of the invention. It is a block diagram of the winning lottery means of the gaming machine according to the first embodiment of the invention. They are the front view (the figure (a) and sectional drawing (the figure (b))) of the medal (game medium) used in the embodiment of the invention. It is a block diagram of the communication apparatus which concerns on embodiment of invention. It is a perspective view of a medal selector concerning an embodiment of the invention. It is a flowchart of the internal lottery process which concerns on Embodiment 1 of invention. It is explanatory drawing which shows a mode that the medal used in embodiment of invention circulates in a hole. It is a block diagram of the winning lottery means of the gaming machine according to the second embodiment of the invention. It is explanatory drawing of a random number generator. It is explanatory drawing (timing chart) of the change of the random number series which concerns on Embodiment 2 of invention. It is explanatory drawing of the random number generation and random number extraction in the conventional game machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main board | substrate 1a Winning lottery means 2 Sub board | substrate 3 Random number generator 4 Random number extractor 5 Judgment part 6 Winning judgment table 7 Communication apparatus 8 Synthesis | combination part 10 Slot machine 11 Case 12 Display window 13 Symbol display window 16 Bet switch 17 Check switch 30 start switch 40 rotating reel 42 reel tape 50 stop switch 60 reel unit 61 design 62 liquid crystal display unit 70 reel driving unit 71 reel position detection circuit 80 hopper driving unit 81 hopper 82 medal detection unit 100 medal insertion port 200 liquid crystal control board 201 speaker 202 LED board 304 Medal payout slot 311 Medal receiving part (lower plate)

Claims (13)

In a gaming machine equipped with a winning lottery means for performing a lottery based on a signal from a predetermined switch and performing a winning determination based on the result of the lottery,
Provided with a communication device that communicates with the RFID provided in the game medium put in to play the game,
The winning lottery means includes a random number generator for generating random numbers for lottery, a random number extractor for extracting random numbers generated by the random number generator based on the signal of the switch, and data read from the RFID by the communication device Is combined with the value extracted by the random number extractor and output as a random value, a winning determination table that pre-stores the correspondence between the random value related to the lottery and winning, and the combining with reference to the winning determination table And a determination unit that determines whether or not the random number output from the unit has been won or at least one of the types of the wins.   The combining unit performs addition, subtraction, logical sum, logical product, or exclusive logical sum of data read from the RFID by the communication device and a value extracted by the random number extractor, thereby performing the random value. The game machine according to claim 1, wherein:   The synthesizing unit stores at least one random number value generated in the past, and adds or subtracts the stored random number value, data read from the RFID by the communication device, and a value extracted by the random number extractor The gaming machine according to claim 1, wherein the random number value is generated by performing any one of logical sum, logical product, logical product, and exclusive logical sum. In a gaming machine equipped with a winning lottery means for performing a lottery based on a signal from a predetermined switch and performing a winning determination based on the result of the lottery,
Provided with a communication device that communicates with the RFID provided in the game medium put in to play the game,
The winning lottery means includes a random number generator for generating a random number for lottery based on data read by the communication device, a random number extractor for extracting a random number generated by the random number generator based on a signal of the switch, and a lottery A winning determination table that pre-stores the correspondence between the random number value and the winning according to the win, and determines whether or not the random number extracted by the random number extractor is winning or winning type with reference to the winning determination table A gaming machine comprising a determination unit.   5. The gaming machine according to claim 1, wherein the communication device outputs the RFID data read in response to a signal from the predetermined switch.   The communication device stores a plurality of data read from each of the RFIDs of a plurality of game media, and outputs data obtained by combining the plurality of read data when the predetermined switch is operated. A gaming machine according to any one of claims 1 to 4. The communication device has a function of writing data to the RFID,
The communication device stores a part of a random number generated by the random number generator, reads the data from the RFID, and then writes the stored random number to the RFID. Item 7. A gaming machine according to any one of Items 6 to 6. The communication device has a function of writing data to the RFID,
The communication device stores a plurality of data read from each of the RFIDs of a plurality of game media, reads data from the RFID different from the plurality of game media, and then combines the data based on the plurality of data The game machine according to claim 1, wherein the game machine is written in the RFID. It includes a medal passage that rolls medals from the medal insertion port to the medal discharge port, and has a medal selector that selects and sends out the inserted medals.
The communication device includes a receiving antenna for reading data from the RFID, and a transmitting antenna for writing data to the RFID,
The gaming machine according to claim 7 or 8, wherein the receiving antenna is provided on the upstream side of the medal passage with respect to the transmitting antenna. A method for preventing fraud in a gaming machine that performs a lottery based on a signal from a predetermined switch and makes a winning determination based on a result of the lottery,
Generating random numbers for lottery;
Extracting the generated random number based on the signal of the switch;
Communicating with an RFID provided in a game medium input to play a game, and reading data from the RFID;
Combining the data read from the RFID with the extracted value to obtain a random value;
A fraudulent gaming machine comprising: determining whether at least one of winning type or winning type of a synthesized random value is determined by referring to a winning determination table that stores in advance the correspondence between a random number value related to lottery and winning Action prevention method. A method for preventing fraud in a gaming machine that performs a lottery based on a signal from a predetermined switch and makes a winning determination based on a result of the lottery,
Generating random numbers for lottery;
Extracting the generated random number based on the signal of the switch;
With reference to a winning determination table that pre-stores the correspondence between the random value related to the lottery and the winning, and determining at least one of the winning type or the winning type of the extracted random value;
Communicating with an RFID provided in a game medium input to play a game, and reading data from the RFID;
A method for preventing fraud in a gaming machine, comprising: changing a random number sequence generated based on the read data. A program for causing a computer to execute a method for preventing fraud in a gaming machine that performs a lottery based on a signal from a predetermined switch and performs a winning determination based on a result of the lottery,
Generating random numbers for lottery;
Extracting the generated random number based on the signal of the switch;
Communicating with an RFID provided in a game medium input to play a game, and reading data from the RFID;
Combining the data read from the RFID with the extracted value to obtain a random value;
A program for executing a step of determining at least one of the winning type and the winning type of the synthesized random number value with reference to a winning determination table that stores in advance the correspondence between the random value related to the lottery and the winning . A program for causing a computer to execute a method for preventing fraud in a gaming machine that performs a lottery based on a signal from a predetermined switch and performs a winning determination based on a result of the lottery,
Generating random numbers for lottery;
Extracting the generated random number based on the signal of the switch;
With reference to a winning determination table that pre-stores the correspondence between the random value related to the lottery and the winning, and determining at least one of the winning type or the winning type of the extracted random value;
Communicating with an RFID provided in a game medium input to play a game, and reading data from the RFID;
And a step of changing a random number sequence generated based on the read data.

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