JP2005021559A - Game machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an illegal action at a low cost without using a blank shoot tester, and to reliably determine the illegal action during a game using a somesthetic apparatus, etc. <P>SOLUTION: The lot processing is performed by prescribed winning probability in response to a prescribed lot start condition. When the lot result is a win, a pachinko game machine 1 allows a state advantageous to a player to appear. At least the history of the lot processing during the game is stored and retained, and also illegality is determined based on the statistic test of the lot processing history. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention performs a lottery process with a predetermined hit probability according to a predetermined lottery start condition, and when the lottery result is a win, a gaming machine such as a pachinko gaming machine or a slot machine that causes a player to appear in a dominant state About.

There is known a gaming machine that draws a lottery in accordance with a predetermined lottery start condition and, when the result is a win, causes a player to appear in an advantageous state. For example, a pachinko gaming machine performs a lottery (special symbol lottery) in accordance with the winning of a game ball with respect to the start opening, and when the result is a win, a big hit state in which many prize balls can be obtained appears.
Usually, a gaming machine such as a pachinko gaming machine is determined to perform the lottery process on the main control board. The main control board has a CPU and a ROM, and the lottery process is performed by the CPU executing a program written in the ROM.

  In addition, it has also been proposed that the lottery process is performed by hardware (IC) without being performed by a CPU (see, for example, Patent Documents 1 and 2). The lottery processing IC (probability generator) shown in Patent Document 1 has a function of giving an appropriate fluctuation to the winning probability, and the lottery process IC (probability generator) shown in Patent Document 2 is the number of lotteries. It has a function to increase the hit probability according to the accumulation of. If such a lottery processing IC is employed in a gaming machine, a complicated lottery process can be performed without increasing the processing load on the CPU.

  By the way, in gaming machines, the act of illegally generating a hit has continually become a big problem. For example, many fraudulent acts using illegal ROMs (hereinafter referred to as back ROMs) and fraudulent acts using hit period notification devices (hereinafter referred to as sensory devices) have been reported. The back ROM includes a program that increases the hit probability illegally, and exchanges it with a regular ROM provided on the main control board, thereby generating an illegal hit. In addition, the sensory device stores in advance a hit generation period (appearance period of a random number to be hit) in a specific gaming machine, and notifies the unauthorized player of the period in a bodily sense.

Therefore, in order to prevent such illegal acts, a game information collecting apparatus that collects game information from gaming machines has been proposed (see, for example, Patent Document 3). The gaming information collection device disclosed in Patent Document 3 inputs a pseudo winning signal (pseudo lottery start signal) to a gaming machine, acquires a lottery result signal corresponding to the pseudo winning signal, and stores this as a game history. It is configured as follows.
Japanese Patent Laid-Open No. 2003-50695 (page 7, FIG. 5) Japanese Patent Laid-Open No. 2003-62221 (page 5, FIG. 5) JP-A-6-54947 (page 4, FIG. 3)

  However, since the game information collection device disclosed in Patent Document 3 is a so-called blank test machine that is used by connecting to a game machine, there is a problem that not only the introduction cost increases but also the external wiring becomes complicated. . In addition, since the blank shot test by the game information collecting apparatus is performed at the time of non-game, it is effective for the illegal act using the back ROM, but it is difficult to find the illegal act during the game using the sensory device.

The present invention has been created to achieve the above-described object, and performs lottery processing with a predetermined winning probability according to predetermined lottery start conditions, and when the lottery result is a win, A gaming machine that causes a dominant state to appear, including at least a history of lottery processing during a game, and having fraud determination means for judging fraud based on a statistical test of the lottery processing history. And If the gaming machine is configured in this way, it is possible to determine fraudulent behavior inside the gaming machine, so that an external device such as an empty test machine is unnecessary, and fraudulent behavior can be prevented at low cost. In addition, since fraud is determined based on the lottery process history during the game, it is possible to reliably determine the fraud during the game using the sensor.
The fraud determination means stores and holds the past lottery times and lottery results as the lottery process history, statistically tests the past hit probability based on the lottery process history, and the past hit probability is abnormally high. It is characterized by judging that it is fraudulent. By configuring the gaming machine in this way, it is possible to deal with various fraudulent acts as well as specific fraudulent activities by determining that the game is fraudulent when the past hit probability is abnormally high.
Further, the fraud determination means stores and holds a past random number generation area as a lottery process history, statistically tests the past random number generation distribution based on the lottery process history, and abnormally biases the past random number generation distribution. When there is, it is judged to be illegal. If the gaming machine is configured in this way, it is possible to determine the use of the sensation device, so that it is possible to prevent an unauthorized hit using the sensation device in advance.
In addition, a lottery processing IC that performs a lottery process with a predetermined winning probability in response to an input of a lottery start signal and outputs a lottery result signal, and a gaming machine control unit that acquires a lottery result signal from the lottery process IC are provided. The gaming machine control unit is provided with the fraud determination means. If the gaming machine is configured in this way, it is possible to determine fraud even in a gaming machine that employs a lottery processing IC. For example, it is possible to determine an illegal act using a modified IC or an illegal act of forcibly inputting a signal to the gaming machine control unit.
Further, the fraud determination means outputs a pseudo lottery start signal to the lottery processing IC, acquires a lottery result signal corresponding to the pseudo lottery start signal, and performs statistical analysis based on the history of the lottery result signal. It is characterized by performing a proper test. If the gaming machine is configured in this manner, it is possible to acquire lottery processing histories in a large amount in a short time and to judge fraudulent acts using a modified IC very quickly. In addition, since the number of times of lottery result signal input in the gaming machine control unit increases with the output of the camouflaged lottery start signal, even if the hit signal is forcibly input to the gaming machine control unit, it is determined as an effective hit signal. The possibility of being fraudulently reduced and the effect of preventing fraud can be increased.
The lottery processing IC outputs a hit / miss signal and / or a random number signal as a lottery result signal. If the gaming machine is configured in this way, the effect of the present invention is not limited to the case where a lottery processing IC that outputs a hit / miss signal is employed, but also when a lottery processing IC that outputs a random number signal is employed. can get.

  According to the gaming machine of the present invention, it is possible to prevent cheating at low cost by judging cheating inside the gaming machine without using an external device such as an empty test machine, It is possible to reliably determine fraudulent acts during games using the above.

Next, embodiments of the present invention will be described with reference to the drawings.
[Basic configuration of pachinko machines]
First, a basic configuration of a pachinko gaming machine (game machine) according to the present invention will be described. 1 and 2, reference numeral 1 denotes a pachinko gaming machine. The pachinko gaming machine 1 is attached to an outer frame 2 fixed to a pachinko island so as to be freely opened and closed. At the position adjacent to the side of the pachinko gaming machine 1, a ballroom lending machine 3 is juxtaposed, and by inserting cash (banknotes or coins) or a prepaid card into this ballroom lending machine 3, A game ball is rented out from the lending machine 3 or the pachinko gaming machine 1, and a pachinko game becomes possible.

  The front surface of the pachinko gaming machine 1 has a game board 4, an openable / closable glass frame 5 covering the front, an upper plate 6 for storing game balls, a lower plate 7 for storing surplus balls of the upper plate 6, and a game ball A launching handle 8 that performs a launching operation, a lending operation unit 9 that lends a gaming ball, and a speaker 10 that generates sound effects are provided. The back of the pachinko gaming machine 1 has a gaming ball for payout. A game ball tank 11 for storing the game ball, a prize ball payout device 12 for paying out the game balls in the game ball tank 11 to the upper plate 6, a launch motor (launch device) 13 for firing the game balls, and various control boards described later. And.

  As shown in FIG. 3, the game board 4 is provided with a start port 14, a winning port 15, a big winning port 16, a gate 17, an out port 18, and a game nail 19, and the game fired on the game board 4. The ball is guided to each of the mouths 14 to 18 by the game nail 19. A special symbol display unit 20 made of a liquid crystal panel is provided at the center of the game board 4 and is surrounded by a center ornament 21. In addition, a stage 22 for moving the game ball is provided at the inner lower portion of the center decoration 21.

[Basic operation of pachinko machines]
When the shooting handle 8 is turned and operated while the game balls are accumulated on the upper plate 6, the game balls are launched toward the game board 4. When the launched game ball wins the start port 14 or the winning port 15, a predetermined number of game balls are paid out as prize balls.

  When the game ball passes through the gate 17, the normal symbol is displayed in the normal symbol display unit (in this embodiment, the special symbol display unit 20 is also used), and the stop symbol is a predetermined symbol. In the case of a winning symbol, the ordinary electric accessory 14a provided at the start port 14 is opened for a predetermined time.

  Further, when the game ball wins the start opening 14, the special symbol display unit 20 displays the variation of the special symbol lottery. A lottery right obtained by winning a prize at the start port 14 can be reserved up to a predetermined reserved number (for example, four), and the reserved number is indicated by a reserved number display section (in this embodiment, a special symbol). The display unit 20 is also used.). When the display symbol of the special symbol display unit 20 stops with a predetermined combination of jackpots, a jackpot mode (specific game state) described later is set. Hereinafter, various game modes of the pachinko gaming machine 1 that are switched in response to the start or end of a big hit will be described with reference to FIG.

[Game mode of pachinko machines]
1) Normal game mode In this mode, a low probability (for example, 1/359) of the two levels of big hit probability is applied. In this mode, the normal symbol lottery cycle is long.
2) Jackpot mode This mode is executed when a special symbol stops at a predetermined jackpot arrangement. In the big hit mode, the special electric accessory 16a provided in the big winning opening 16 is opened, which is advantageous to the player. The opening operation is terminated on the condition that a predetermined time has elapsed (for example, 30 seconds) or a predetermined number of winnings (for example, 10 balls), but the game ball that has been won during the opening operation is in a specific area within the big winning opening 16. When passing, the above opening operation is repeated up to a predetermined number of rounds (for example, 15 rounds).

3) Stochastic variation mode This mode is executed with a predetermined probability (for example, 1/2) after the big hit mode is finished. For example, when the special symbol at the big hit is a probability fluctuation symbol, That right is given. In the probability variation mode, the jackpot probability is high (for example, 1/65), the lottery cycle of the normal symbol is short, and the opening time of the normal electric accessory 14a is long. The big hit can be generated again.

4) Time reduction mode This mode is executed after the big hit mode is finished. In the time shortening mode, the same big hit probability (low probability) as in the normal game mode is applied, but the lottery cycle of the normal symbol 14a is long and the holding time of the ordinary electric accessory 14a is long. The game can be continued. However, this mode is terminated when the number of changes in the special symbol reaches a predetermined number (for example, 100 times) after the big hit, and the mode is switched to the normal game mode.

[Board configuration of pachinko machines]
As shown in FIG. 5, the pachinko gaming machine 1 includes a main control board 23 as a main board, and a symbol display control board 24, a sound control board 25, a lamp control board 26, a payout control board 27, and a launch motor as sub boards. A control board 28 is provided. The payout control board 27 is connected to a ball break switch 29, a payout sensor 30, a payout motor 31, and the like, and in addition to paying out game balls in accordance with a payout designation command from the main control board 23, lending between balls. The game ball is paid out in accordance with the rental designation command from the machine 3. The firing motor control board 28 is connected to a firing switch (handle angle sensor) 32, a touch sensor 33, a firing motor 13, and the like. When the firing switch 32 and the touch sensor 33 are ON, the firing motor 13 is driven. Let

  The symbol display control board 24 is a sub board that performs display control of the special symbol display unit 20 in response to a command from the main control board 23, and the sound control board 25 corresponds to a command from the main control board 23. The lamp control board 26 is a sub board that controls lighting of the light emitting display lamp L in a predetermined pattern in response to a command from the main control board 23. .

  The main control board 23 has a winning port sensor S1 for detecting a winning at the winning port 15, a starting port sensor S2 for detecting a winning at the starting port 14, a gate sensor S3 for detecting the passage of the gate 17, and a big winning port 16 Sensors such as a grand prize opening sensor S4 for detecting a prize winning, a V sensor S5 for detecting passage of the special prize opening 16 through a V zone (specific region), and a special electric accessory solenoid for opening / closing the special electric accessory 16a. The control boards 23 to 27 are connected to actuators such as a SOL1 and an ordinary electric accessory solenoid SOL2 that opens and closes the ordinary electric accessory 14a. That is, the main control board 23 is configured to perform a special symbol lottery process, a normal symbol lottery process, a command transmission process for each sub board, an electric accessory operation process, and the like according to the detection signals of the sensors S1 to S5. Hereinafter, the configuration and control contents of the main control board 23 will be described in detail.

  As shown in FIG. 6, the main control board 23 includes a CPU (game machine control unit) 34 and a lottery processing IC 35. The CPU 34 executes the various processes described above according to a main control program written in a ROM (not shown). The lottery process IC 35 is hardware configured to perform a lottery process. In the present embodiment, a special symbol lottery is performed using the lottery process IC 35. The lottery processing IC 35 has a TRG terminal for inputting a lottery start signal (trigger signal), a H0 terminal for outputting a special symbol lottery result signal (win / fail signal) at a low probability as a lottery result signal, and a high as a lottery result signal. An H1 terminal that outputs a special symbol lottery result signal (a hit / miss signal) at the time of probability and an END terminal that outputs an acquisition timing signal for the lottery result signal are provided, and both terminals are connected to the CPU 34.

[Configuration and function of lottery processing IC]
The lottery processing IC 35 performs a lottery process with a predetermined hit probability in response to an input of a lottery start signal from the TRG terminal, and outputs a lottery result signal from the H0 and H1 terminals, and from the output of the lottery result signal. And an acquisition timing signal output circuit that outputs an acquisition timing signal from the END terminal after a predetermined time.

  As shown in FIG. 7, the lottery processing circuit of the lottery processing IC 35 performs the lottery process in response to the input of the lottery start signal, and after the predetermined time (ab) from the input of the lottery start signal, the lottery process circuit 35 draws from the H0 and H1 terminals. Output the result signal. However, since the minimum value a is defined for the output time pitch of the lottery result signal, for example, as shown in FIG. 7, if there are two lottery start signal inputs within the time a, the second time The lottery result signal output is delayed. The acquisition timing signal output circuit of the lottery processing IC 35 outputs an acquisition timing signal from the END terminal after a predetermined time b from the output of the lottery result signal. The set times a and b can be arbitrarily set. For example, a is set to 100 msec and b is set to 200 nsec.

[Main control program]
Next, the control content of the main control board 23 is demonstrated along a flowchart. As shown in FIG. 8, the main control program includes a main process and two interrupt processes. The main process performs initial processing such as CPU initial setting processing, built-in device initial setting processing, RAM initial setting processing, and power-on command transmission processing when power is turned on, then interrupts are permitted, and random number update processing for effects is performed. Execute repeatedly. The interrupt process includes an END interrupt process that occurs at the rising edge of the END terminal signal and a timer interrupt process that occurs at a fixed period (for example, 2 msec). The priority order is higher than that of the timer interrupt process. Interrupt processing is set higher.

  As shown in FIG. 9, in the END interrupt processing, the register is saved and “FF (h)” is set in the completion flag, and then the H0 and H1 terminal signals from the input port (win = 0, off = 1) And store these values in the determination result value. Thereafter, a register restoration process is performed, and an interrupt is permitted to return to the main process.

  As shown in FIG. 10, the timer interrupt processing is performed after register saving, watchdog timer clear, and the like, output processing, timer update processing, input processing, random number generation processing (for normal symbol lottery), determination result Subroutines such as acquisition processing, special symbol processing, special prize opening processing, normal symbol processing, normal electric equipment processing, fraud determination processing (fraud determination means), etc. are executed, and then register return and interrupt permission are performed to perform main processing Return to. Hereinafter, among the above subroutines, an input process, a determination result acquisition process, and an fraud determination process related to the present invention will be described.

  As shown in FIG. 11, in the input process, after “0” is output to the TRG terminal, the input of each port is checked to detect an edge. Next, the input from the start port sensor S2 is determined, and if the determination result is YES, it is further determined whether or not the number of temporary storage is four or more. If the determination result is NO, the temporary storage number is incremented (added by 1) and “1” (lottery start signal) is output as a trigger signal to the TRG terminal, and then the T counter is updated (incremented). )I do. The T counter is a counter that counts the number of times the trigger signal is output, and counts the number of outputs including a pseudo trigger signal (pseudo lottery start signal) described later. After updating the T counter, the T counter value is stored in one of the T counter storage areas 1 to 4 according to the temporary storage number, and the process returns to the upper routine.

  On the other hand, when there is no input from the start port sensor S2, generation processing of a pseudo trigger signal is performed. This process is a process for outputting a pseudo trigger signal to the TRG terminal at a predetermined cycle. Here, it is determined whether or not to output a pseudo trigger signal. When outputting the pseudo trigger signal, the T counter is updated after outputting “1” to the TRG terminal, but the T counter value is not stored when the pseudo trigger is output. That is, in this embodiment that outputs a pseudo trigger signal, a T counter value is stored in order to distinguish a lottery result signal corresponding to a normal trigger signal and a lottery result signal corresponding to a pseudo trigger signal.

  As shown in FIG. 12, in the determination result acquisition process, first, it is determined whether or not the completion flag is other than “0”. If the determination result is NO, the process returns to the upper routine as it is. On the other hand, when the completion flag is other than “0”, the A counter is updated (incremented). The A counter is a counter that counts the number of acquisitions of the lottery result signal, and counts the number of acquisitions including the lottery result signal corresponding to the pseudo trigger signal. After updating the A counter, the T counter values in the T counter storage areas 1 to 4 corresponding to the temporary storage number are compared with the A counter value, and if they match, the lottery result signal corresponding to the normal trigger signal is used. If there is no match, it is determined that the lottery result signal corresponds to the pseudo trigger signal.

  When the lottery result signal corresponds to the normal trigger signal, the determination result value acquired by the END interrupt process is stored in the jackpot determination storage area according to the number of special symbols stored. The jackpot determination storage area can store a maximum of four determination result values, and the storage destination of the determination result values is sequentially shifted in accordance with the number of storage. After the determination result value is stored in the jackpot determination storage area, it is determined whether or not the determination result value is a win. When the determination result is YES, the A counter value is stored in a predetermined storage area. Update the hit counter. Thereafter, the number of stored special symbols is incremented, and the completion flag is set to “0” to return to the upper routine. On the other hand, if the lottery result signal corresponds to the pseudo trigger signal, the lottery result signal is checked. If it is a win, the A counter value is stored in a predetermined storage area and the hit counter is updated. To do. Thereafter, the completion flag is set to “0” and the process returns to the upper routine.

  As shown in FIG. 13, in the fraud determination process, first, it is determined whether or not the A counter value has reached a predetermined fraud determination execution count (for example, every 10,000 times). If the determination result is YES, Based on the A counter value and the winning counter value, the past hit probability is calculated (statistical test of lottery processing history). Next, the past hit probability and the fraud determination value (for example, normal hit probability × 2) are compared. If the past hit probability exceeds the fraud determination value, it is determined that an illegal act is being performed, and a predetermined fraud notification process is performed. In the above description, the low probability and the high probability are not distinguished, but in actuality, the fraud determination is performed after the low probability and the high probability are distinguished.

  The pachinko gaming machine 1 of the present embodiment configured as described above performs a lottery process with a predetermined hit probability according to a predetermined lottery start condition, and when the lottery result is a win, the player has a superior state. In order to appear, at least the lottery process history during the game is stored and held, and fraud is determined based on a statistical test of the lottery process history. Thus, fraud can be determined by software control inside the gaming machine without using an external device such as a blank test machine, and as a result, fraud can be prevented at low cost. In addition, since fraud is determined based on the lottery process history during the game, it is possible to reliably determine the fraud during the game using the sensor.

  In addition, the lottery process history and lottery results are stored and retained as a lottery process history, and past hit probabilities are statistically tested based on the lottery process history. Since it judges, it can respond not only to a specific fraud but various fraud.

  In addition, a lottery process IC 35 that performs a lottery process with a predetermined winning probability in response to an input of a lottery start signal and outputs a lottery result signal, and a CPU 34 that acquires a lottery result signal from the lottery process IC 35 are provided. However, since the above fraud determination is performed, it is possible to determine an illegal act using a modified IC or an illegal act of forcibly inputting a signal to the CPU 34.

  In addition, a lottery processing history is output in order to output a pseudo trigger signal to the lottery processing IC 35, acquire a lottery result signal corresponding to the pseudo trigger signal, and perform a statistical test based on the history of the lottery result signal. Can be obtained in large quantities in a short period of time, and fraudulent acts using altered ICs can be determined very quickly. In addition, since the number of lottery result signals input in the CPU 34 increases with the output of the camouflage trigger signal, even if the hit signal is forcibly input to the CPU 34, the possibility of being determined as an effective hit signal is extremely low. , Fraud prevention effect can be enhanced.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the second embodiment, the lottery processing IC 35 outputs a random number signal as the lottery result signal, and the CPU 34 stores and holds the past random number generation area as the lottery processing history, and the past random number based on the lottery processing history. This is different from the above embodiment in that the occurrence distribution is statistically tested, and when there is an abnormal bias in the past random number generation distribution, it is determined to be illegal.

  The CPU 34 according to the second embodiment uses a random number range (for example, 1 to 350) in advance as a plurality of random number generation areas (for example, the areas R1: 1 to 50, the areas R2: 51 to 100, the areas R3: 101 to 150, and the areas R4). : 151-200, region R5: 201-250, region R6: 251-300, region R7: 301-350) and counters R1-R7 corresponding to the regions R1-R7. When the random number signal is acquired from the lottery processing IC 35, the counters R1 to R7 of the area to which the random number belongs are incremented. As a result, the past random number generation area can be stored and held as the lottery process history, and the past random number generation distribution can be statistically verified based on the lottery process history. When the random number acquisition count reaches a predetermined fraud determination execution count (for example, every 10,000 times), the counter value of the random number generation area (for example, R1) including the hit determination value (for example, 7) and the predetermined fraud determination value (For example, twice the average occurrence distribution number) and if the counter value exceeds the fraud determination value, it is determined to be fraudulent, and a predetermined fraud notification process is performed.

  In the second embodiment of the present invention configured as described above, the past random number generation area is stored and held as the lottery process history, and the past random number generation distribution is statistically verified based on the lottery process history. When there is an abnormal bias in the random number generation distribution, it is determined to be fraudulent. Therefore, the use of a sensory device that notifies the perceived random number generation period is determined with certainty. Can be prevented.

  Of course, the present invention is not limited to the above embodiment, and in the above embodiment, the lottery process IC is used to perform the lottery process, but the CPU performs the lottery process (random number generation and hit determination). But it goes without saying that it can be done. In this case, the pseudo lottery process is not executed, but the history of the lottery process during the game is stored and held, and fraud can be determined based on the statistical test of the lottery process history.

It is a front view of a pachinko gaming machine. It is a rear view of a pachinko gaming machine. It is a front view of a game board. It is a flowchart which shows switching of game mode. It is a block diagram which shows the whole control system of a pachinko gaming machine. It is a block diagram which shows the structure of a main control board. It is a timing chart which shows operation | movement of lottery process IC. It is a flowchart which shows the main process of a main control program. It is a flowchart which shows the END interruption process of a main control program. It is a flowchart which shows the timer interruption process of a main control program. It is a flowchart which shows the input process of a main control program. It is a flowchart which shows the determination result acquisition process of a main control program. It is a flowchart which shows the fraud determination process of a main control program.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pachinko machine 4 Game board 14 Start opening 16 Extra prize opening 20 Special symbol display part 23 Main control board 34 CPU
35 lottery processing IC
S2 Start sensor

Claims (6)

A gaming machine that performs a lottery process with a predetermined hit probability according to a predetermined lottery start condition, and when the lottery result is a win, causes a player to appear in a dominant state,
A gaming machine comprising: a fraud determination means for storing and holding at least a lottery process history during a game and determining fraud based on a statistical test of the lottery process history. The fraud determination means stores and holds the past lottery times and lottery results as the lottery process history, statistically tests the past hit probability based on the lottery process history, and when the past hit probability is abnormally high, The gaming machine according to claim 1, wherein the gaming machine is determined to be illegal. The fraud determination means stores and holds a past random number generation area as a lottery process history, statistically tests the past random number generation distribution based on the lottery process history, and has an abnormal bias in the past random number generation distribution. 2. The gaming machine according to claim 1, wherein the gaming machine is determined to be illegal. A lottery processing IC that performs a lottery process with a predetermined winning probability in response to an input of a lottery start signal and outputs a lottery result signal; and a gaming machine control unit that acquires a lottery result signal from the lottery process IC, The gaming machine according to claim 1, wherein the gaming machine control unit is provided with the fraud determination means. The fraud determination means outputs a pseudo lottery start signal to the lottery processing IC, acquires a lottery result signal corresponding to the pseudo lottery start signal, and performs a statistical test based on the history of the lottery result signal. The gaming machine according to claim 4, wherein: The gaming machine according to claim 4 or 5, wherein the lottery processing IC outputs a hit / miss signal and / or a random number signal as a lottery result signal.

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