JPH10328371A - Pachinko game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate dissatisfaction felt by a player when the continuation of a high probability is limited in a pachinko game machine. SOLUTION: A CPU of a game controller has a special game end flag F2 set to 1 (S401: YES) and when a judging probability is set to a high value (S403: YES), the CPU adds the number of rounds executed by a preceding special game to the sum of rounds (S404). Then, when the sum of the rounds reaches the upper limit of the total (S405: YES), the judging probability is set to a low value (S406). When the setting of the judging probability to the high value is continued and the total of the rounds reaches 80 as executed in a special game during the period, the probability is forcibly set to a low value even if it is set to the high value by the preceding special game processing so that there is no unlimited continuation of the high probability. The limit to the continuation of the high probability is determined by the number of the rounds thereby eliminating dissatisfaction as felt by a player on a basis of the frequency of the special game.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball-and-ball game machine such as a pachinko machine and an arrangement ball-type pachinko machine.

[0002]

2. Description of the Related Art When a condition for executing a judgment is satisfied, a judgment means for judging a hit or miss is determined. When the probability return condition is satisfied, the mode change means that shifts the determination means from the high probability mode to the low probability mode, and the specific prize device is operated by operating The prize device is changed from a difficult prize state or a non-prize state to an easy prize state, and when the operation time of the specific prize apparatus or the number of game balls that have won the specific prize apparatus during the operation of the specific prize apparatus reaches the upper limit, 1 is set. Special game execution means for executing a special game in which the operation of a specific prize device is ended as the end of the round and the round is repeated one or more times. That there is a pinball game machine, it is commonly referred to as the probability change machine.

[0003] In this probability variation machine, for example, when a hit is displayed by a specific symbol (for example, 777 or 333 is often set) on a symbol display device for displaying a judgment result, a high probability mode is set. It is easier to hit up to two times. In addition, when the specific symbol is displayed by the hit in the high probability mode, two more
There is a model in which hitting is easily performed up to the time (for example, JP-A-6-170045). That is, if one of the two winning displays is a specific symbol, the high-probability mode is maintained, so that the high-probability mode may continue for a long time.
However, if the high-probability mode continues for a long time, the number of game balls acquired by the player during that time will be enormous, and it may incite gambling, so there are also restrictions on the continuation of the high-probability mode. ing.

[0004]

The continuation of the high probability mode is limited by the number of special games, for example, up to five special games.
Normally, in one special game, for example, the upper limit of the number of times of operation (the number of rounds) of the grand prize device is set to 16 times, but if the condition for continuing the round is not satisfied (for example, the grand prize device) In some cases, the special game may end before reaching 16 rounds (unless the game ball passes through a special area (so-called V zone)). There is also a ball game machine in which the number of rounds is determined, for example, from 2 to 16 at the start of a special game. In other words, for example, even if five special games are played, if all of the special games are completed only in one round, there are only five rounds in total, and in the minimum (5 rounds) and the maximum (80 rounds), It was a big difference. For this reason, the player side was dissatisfied with the mode in which the continuation of the high probability mode was limited by the number of special games.

An object of the present invention is to eliminate such complaints on the player side.

[0006]

According to a first aspect of the present invention, there is provided a ball game machine comprising: a judging means for judging a hit or miss when a judgment execution condition is satisfied; When the condition is satisfied, the determination means is shifted from the low probability mode to the high probability mode in which the probability of determining a hit is higher than the low probability mode, and when the probability return condition is satisfied, the determination means is shifted from the high probability mode to the low probability mode. Mode change means to be performed, and as a prerequisite that the determination means determines that a hit has occurred, a specific prize device is operated to make the specific prize device easy to win from a difficult or impossible state of winning, If the operating time of the specific prize device or the number of game balls that have won the specific prize device during the operation of the specific prize device reaches the upper limit, the one round is terminated. Terminates the operation of the constant-winning device,
A special game execution means for executing a special game for repeating the round once or a plurality of times,
The probability return condition is a setting that is satisfied even when the total of the number of rounds in the series of special games resulting from the series of hit determinations in the high probability mode reaches a total upper limit, A round number setting means for setting a round number upper limit value as an upper limit of the round number for each of the special games based on the hit determination in the high probability mode is provided.

[0007] Examples of the judgment execution conditions in the ball-and-ball game machine include a specific winning opening, a ball entering a ball entrance, and a passage through a specific passage (gate). It is only necessary that certain conditions are set,
However, it is not limited to these. The determination by the determination means may be performed by reading the count value of a counter for determination when the determination execution condition is satisfied, and hitting if the count value matches the hit value, and otherwise deviating. The method described above may be employed. Further, when the determination execution condition is continuously satisfied, the determination execution condition is stored, and after the processing related to the previous determination (for example, the result display or the special game) is completed, the processing for the subsequent minute is performed. It may be configured to execute.

[0008] The special game execution means executes the special game on the precondition that the determination means determines that the hit is a hit. The special game may be executed only on condition that it is determined as a hit by the determining means, or when there is a hit determination and other conditions are satisfied, for example, when the game ball passes a specific area. The execution may be limited.

The special game execution means activates a specific prize device to change a specific prize device from a difficult or impossible prize state to a prize-winning state, and operates the specific prize device or activates the specific prize device. When the number of game balls that have won the specific prize device during operation reaches the upper limit, the operation of the specific prize device is terminated as one round ends, and a special game is executed by repeating this round one or more times.

However, for a special game resulting from a hit judgment in the high probability mode, the round number setting means sets a round number upper limit value as an upper limit of the round number. Never exceed. Switching between the low-probability mode and the high-probability mode is performed, for example, by using a common counter for determination. In the low-probability mode, only one hit value (for example, 1) is set, and in the high-probability mode, 10 hit values (for example, 1 to 10) are set. ), Such as a method of increasing or decreasing the hit value, for example, fixing the hit value to 1, using a counter that counts an integer value of 0 to 199 in the low probability mode, and using 0 to 19 in the high probability mode.
Although a method using a counter that counts the integer value of is exemplified, the present invention is not limited thereto. In short, it is only necessary that the high probability mode is easier to hit than the low probability mode.

Due to the nature of the ball game, there is a period (for example, during execution of a special game) in which it is preferable to set the judgment probability to a low probability even in the high probability mode. Among them, the determination probability may be set to a low probability. Further, the hit probability may be further changed in the high probability mode.

As the probability variation condition, for example, a specific symbol (for example, 777) is used in a symbol display device for displaying a judgment result.
And 333 are often set), the hit is displayed, but the present invention is not limited to this. However, it is better to indicate to the player that the probability variation condition has been satisfied.

The probability return condition is exemplified by a case where the display of a hit other than a specific symbol is continued for a set number of times (for example, two times). The point is that the condition for returning from the high probability mode to the low probability mode is essential. Is only required to be set, and is not limited to these. However, it is essential that the probability return condition is satisfied when the total number of rounds in a series of special games resulting from a series of hit determinations in the high probability mode reaches the total upper limit. Here, the series of hit determination means that the high probability mode is not interrupted.

As the total number of rounds of the special game (the total upper limit), the total number of rounds executed in a series of special games may be used, or the number of rounds setting means may be used for each special game. The total of the set upper limit of the number of rounds may be used. The total upper limit value can be set in advance, but a total upper limit value setting means for setting the total upper limit value may be provided.
In that case, for example, the total upper limit is determined according to the symbol used for the hit display of the judgment that triggered the transition to the high probability mode, or a symbol for the total upper limit determination is randomly displayed separately from it The total upper limit can be determined according to the display result. In the case of these examples, the total number of rounds is determined depending on the symbols to be displayed (the number of game balls that can be expected to be obtained from the viewpoint of the player is determined), thereby increasing interest.

When the upper limit of the number of rounds set by the number-of-rounds setting means is as small as two rounds, for example, the determination probability after the special game can be further increased in the high probability mode to make it easier to win. . Alternatively, the opposite is possible (if the upper limit of the number of rounds is large, a low determination probability is used even in the high probability mode).

In this ball-and-ball game machine, the continuation of the high probability mode is restricted by the total number of rounds. Therefore, as in the prior art in which this is performed by the number of special games, the total number of rounds is extremely reduced due to unfortunate luck. No difference can be made, and the player is not dissatisfied with such a difference in the number of rounds.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

[0018]

As shown in FIG. 1, a liquid crystal display panel 20 which is a part of a symbol display device 14 is provided at the center of a game panel 12 provided in a pachinko machine 10 as a ball game machine of the present invention. It is assembled.

Immediately below the liquid crystal display panel 20, a lottery display 15 of 7-segment LEDs is provided. This lottery display 15 can display an integer value of 0-9. Lottery display 1
Below the start winning prize port 5, a winning prize device 18 called an attacker is disposed below the starting prize port 16. The big winning device 18 has a structure that is opened when the open / close plate 26 is tilted toward the player (toward the player), and closed when the open / close plate 26 is raised, as shown in the figure, and includes a solenoid (not shown) for driving the open / close plate 26. Built-in. The gaming board 12 is provided with a windmill, a well-known winning port, and the like (not shown).

As shown in FIG. 2, the path of the game ball inside the special winning device 18 has two normal areas 13a, 13c and 1
Divided into three special areas 13b.
A V sensor 23 is installed at b. The game balls that have passed through the normal areas 13a, 13c and the special area 13b all merge and are discharged to the back side of the pachinko machine 10, and a 10-ball sensor 24 is provided as an outlet. . That is, among the game balls that have won the special winning device 18, the game balls that have passed through the special area 13 b are detected by the V sensor 23, and all the game balls that have won the special winning device 18 are detected by the 10-ball sensor 24. Configuration.

As shown in FIG. 3, a game control device 30 for controlling the overall operation of the pachinko machine 10 includes a CPU.
32, an R storing an operation program of the CPU 32, etc.
OM34, RAM3 which is a work area of CPU32
6, a counter 38 for repeatedly counting integers from 0 to 249 in ascending order, a counter 40 for repeatedly counting integers from 0 to 999 in ascending order, a counter 42 for repeatedly counting integers from 0 to 9 in ascending order, and an input / output port (not shown). )
And the like.

The game control device 30 includes a lottery display 1
5. Start sensor 17 in the start winning opening 16;
8, a start signal output when the start sensor 17 detects a winning ball, a V signal output when the V sensor 23 detects a game ball, A 10 count signal or the like output when the 10-ball sensor 24 detects a game ball is input to the game control device 30. In addition, the game control device 30 has a lottery display 1
5, the opening and closing of the open / close plate 26 of the special winning device 18 and the like can be controlled.

Further, the symbol display device 14 is also connected to the game control device 30. The symbol display device 14 includes a CPU, a RAM, and an RO in addition to the liquid crystal display panel 20 described above.
A display control device 44 configured as a microcomputer having an M, an input / output port, and the like is built in. The ROM of the display control device 44 stores various image data for displaying numbers, letters such as alphabets, figures, moving images, etc., in addition to the CPU program.
The display control device 44 displays various images on the liquid crystal display panel 20 using the image data, for example, as shown in FIG.
As shown in the figure, three symbol sections 21a, 21b, 2
1c is formed side by side, and characters can be variably displayed or displayed statically in each of the symbol sections 21a to 21c, and the color and background color of the characters displayed in each of the symbol sections 21a to 21c can be changed. As shown in FIG. 9B, characters are displayed large in the center of the screen, the remaining round number display section 25 formed in the upper left corner, the current round number display section 27 formed in the lower left corner, and the lower right corner. It is possible to display a one-digit or two-digit number on the current round number display section 28 formed at the same time.

Next, the operation of the pachinko machine 10 will be described mainly according to the processing executed by the game control device 30. First, a process executed by the CPU 32 of the game control device 30 will be described. The CPU 32 is a pachinko machine 10
The main processing shown in FIG. 4 is executed every time a reset is started due to a hardware interrupt throughout the operation of. Note that even if reset, the contents stored in the RAM 36 and the like do not volatilize.

In this main process, the CPU 32 performs a random number acquisition process for reading the count value of the counter 38 (step 100, hereinafter step is abbreviated as S), and determines whether or not a hit has occurred if a start signal has been input. (S200), a special game process (S300) for executing a process related to a special game such as opening / closing control of the special winning device 18, a round restriction process (S400), and other processes (S500). It waits for reset by a hardware interrupt (S600). In addition, as other processing, there are blinking and sound output of a decoration lamp installed on the game board 12, instructions for paying out to the payout device, and the like. Hereinafter, each of these processes will be described in detail.

As shown in FIG. 5, in the random number acquisition process, when a start signal is input from the start winning opening 16 (S101: YES), the CPU 32 reads the count value C1 of the counter 38 and stores it in the RAM 36. It is stored (S102). Note that a plurality of the count values C1 can be stored in the order in which they were read, and are deleted in chronological order each time a hit determination process described later is executed.

As shown in FIG. 6, in the determination process, the CPU
32, if the count value C1 is stored in the RAM 36 (S201: YES), the oldest one is read out, and it is determined whether or not the count value C1 matches the hit value (S202). Pachinko machine 1 of the present embodiment
If 0, a low probability setting using 1 as the hit value;
There is a high probability setting using ten integer values of 1 to 10 as a winning value, and the determination in S202 is performed according to either of these settings. The probability is set to a low probability immediately after the pachinko machine 10 is started, and thereafter, is set in a special game process described later.

Next, the CPU 32 determines a symbol for displaying the determination result, and instructs the symbol display device 14 to display the symbol (S203). More specifically, if the determination in S202 is a hit, the count value C3 of the counter 42 at that time is read, and a number in which the count values C3 are arranged in three, ie, 000, 111, 222, etc., is determined as a hit symbol, and the symbol display device is determined. Instruct 14. If the determination is wrong, the CPU 32 determines the count value C of the counter 40.
2 is read to determine a missing symbol and instruct it to the symbol display device 14. In this embodiment, when the count value C2 is three digits (100 to 999), the count value C2 is one digit (0 to 9) or two digits (10 to 99). Those that are filled with zeros and have three digits are considered to be out-of-designs. However, in the case where the determined symbols are aligned in three digits such as 000, 111, and 222, 1 is added to the central number, and 010, 121, 2
As in the case of 32, a design is removed.

Next, if the determination result in S202 is a hit (S204: YES), the CPU 32 determines whether the RAM
36, the hit flag F1 is set to 1 (S20).
5) Instruct the RAM 36 to erase the storage of the count value C1 used in S202 (S206). If it is deviated (S204: NO), the CPU 32 does not set the hit flag F1 to 1 and proceeds to S20.
The storage of the count value C1 used in 2 is deleted (S206).

Symbol display device 14 instructed to display symbols
Then, the display control device 44 displays the numbers in the three symbol sections 21a, 21b, and 21c of the liquid crystal display panel 20 in a variable manner, and then displays the one-digit numbers in the symbol sections 21a and 21c in a static manner. The one-digit number is statically displayed in the section 21b, thereby displaying the symbol of the three-digit number specified by the game control device 30.

When a winning symbol is displayed on the symbol display device 14, a special game is executed. Next, this special game will be described with reference to FIG. As shown in FIG. 7, in the special game process, the game control device 3
The CPU 32 of 0 determines whether or not the hit flag F1 is set to 1 (S301).
Is set, it is confirmed that the winning display on the symbol display device 14 has been confirmed, and then the large winning device 18 is opened, and the symbol display device 14 is instructed.
The display as shown in (b) is performed (S302).

In FIG. 9 (b), the character displayed in the center (7 in this figure) is representative of the hit symbol used to display the hit which caused the execution of the special game this time. 9A and 9B show that 777 is displayed. The number in the remaining round display section 25 is displayed when the determination probability is high, and indicates how long the high probability is continued. Limit the number
The current round number display section 28 displays the number of rounds consumed in the current special game, which will be described in detail later.

Next, when there is a V signal from the V sensor 23, the CPU 32 determines whether or not it is the first V signal after opening the special winning device 18 (S303).
If the determination is affirmative (S303: YES), the CPU 32
Determines whether the round count R is 0 (S3).
04). As described later in detail, the round number count R
Is incremented by the processing after the closing of the special winning device 18, and the fact that this is 0 means that it is the first round in this special game, and the passage of the special area 13b for the first time in this special game It can be said. The above-described current round number display section 28 displays a number obtained by adding 1 to the round number count R, and indicates the current round number.

If the determination is affirmative (S304: YE)
S), the CPU 32 reads the count value C3 of the counter 42 at that time, fluctuates the display of the lottery display 15, and then displays the count C3 on the lottery display 15 in a stationary manner (S305). Then, based on the count value C3, the upper limit of the number of rounds in the current special game is determined, and this is displayed on the current round number display section 27 (S
306). In the present embodiment, the upper limit of the number of rounds is 2 if the count value C3 is 0, the upper limit is 6 if the count value C3 is 1 and 2, and the upper limit is 1 if the count value C3 is 3, 4, and 5.
2. If the count value C3 is 6, 7, 8, or 9, the upper limit is determined to be 16. In the current round number display section 27 of FIG.
It is shown that the upper limit is 16 rounds.

However, when the determination probability is high, the total round number calculated in S404 of the round restriction process (to be described later) (the total round number when the last special game is completed) is the current round determined in S306. If the total number of the rounds exceeds 80 when the upper limit of the number is added, the upper limit of the current round number is corrected so that the sum of the total round number up to the previous time and the current round number becomes 80. Therefore,
When the determination probability is high, the total number of rounds of a series of special games does not exceed 80.

Next, the CPU 32 determines whether or not to close the special winning device 18 (S307). This big winning device 1
The condition of closing 8 is the same as that of a known pachinko machine, and the CPU 32 determines that 30 seconds have elapsed since the opening of the special winning device 18, or based on the 10 count signal from the 10-ball sensor 24, If it is determined that ten winning balls have been reached, it is determined to be closed (S307: YES), and the special winning device 18 is closed (S308).

Next, the CPU 32 determines whether or not to reopen the special winning device 18 and continue the special game (S30).
9). More specifically, if any of the currently open prize balls has passed through the special area 13b in the special prize winning device 18 and has not reached the upper limit of the number of rounds determined in S306 (the upper limit of the number of rounds-rounds) If the number count R is not 1), it is determined to continue the special game (S309: YE)
S), 1 is added to the round count R (S31)
0).

If the special game is not to be continued (S
309: NO), and the CPU 32
Then, the win flag F1 is reset, and the special game end flag F2 is set to 1 (S311). Then, it is determined whether the determination probability to be used in the determination processing until the next hit is set to a high probability or a low probability (S31).
2). In the case of the present embodiment, the determination is made based on the hit symbol used for the display of the hit which caused the execution of the special game this time, and if the display of the hit is 333 or 777, the determination probability is set to a high probability. If the high probability has already been set, the high probability is maintained until a winning symbol other than 333 or 777 is displayed twice consecutively. However, even if a high probability is set here, the probability may be returned to a low probability in the round restriction process described later. If the current setting is low probability and the hit display is other than 333 or 777, the low probability is maintained.

If the CPU 32 decides to set a high probability (S312: high), it sets the judgment probability to a high probability (S313). If it is determined that the low probability is maintained or returned to the low probability (S312: low), the determination probability is set to the low probability (S314). If the determination probability is set to a high probability by the process of S313, it becomes easier to hit until the next two hits. In addition, if at least 333 or 777 of the two times, the determination probability is maintained at a high probability. Therefore, there is a possibility that a high probability will endlessly continue and win continuously. Then, the number of game balls acquired by the player during that time will be enormous,
The pachinko machine 10 of the present embodiment may inspire gambling.
Then, by executing the round limiting process described below, the high probability is prevented from continuing forever.

As shown in FIG. 8, C of the game control device 30
When starting the round restriction process, the PU 32 first determines whether or not the special game end flag F2 is set to 1 (S401). And the special game end flag F2
Is set (S401: YES), it is reset (S402). In addition, the special game end flag F
If 2 is not set (S401: NO), CP
U32 returns to the main processing without performing the processing of S402 and subsequent steps. This special game end flag F2 is set at the end of the special game, and if it is set, it is reset in the subsequent processing of S402, so the first round restriction processing after the end of the special game Only the processing of S402 and subsequent steps will be executed.

Next, the CPU 32 determines whether or not the determination probability is set to a high probability (S403). If a negative determination is made here (S403: NO), the CPU 32 returns to the main processing without performing the following processing. Also,
If the determination is affirmative (S403: YES), the CPU 32 adds the number of rounds executed in the immediately preceding special game to the total number of rounds and stores the result in the RAM 36. The initial value of the total number of rounds is 0, and is set to 0 in an initial setting process immediately after the pachinko machine 10 is started.

Next, the CPU 32 determines whether or not the total round number updated in S404 has reached 80 (S405). This numerical value of 80 corresponds to the total upper limit of the present invention, and in the case of the present embodiment, this (the total upper limit) is 8
It is set to 0. If the total number of rounds has reached 80 (S405: YES), the CPU 32
The determination probability is set to a low probability (S406), the total number of rounds is reset to the initial value of 0 (S407), and the process returns to the main process. Also, when the total number of rounds has not reached 80 (S405: NO), the process returns to the main process. If the total number of rounds has not been reset to the initial value, that is, if the total number of rounds has not reached 80, the difference between the total number of rounds updated in S404 and 80 (that is, what is more until the total number of upper rounds is reached is reached). Is displayed in the remaining round display section 25 shown in FIG. 9B.

As described above, when the state in which the determination probability is set to the high probability continues and the total number of rounds executed in the special game during that time reaches 80, even if the total number of rounds executed in the last special game process is high, Even if it is set to, the low probability is set forcibly, so the high probability continues endlessly and it hits continuously, so that the player does not get a huge number of game balls, it stimulates eagerness There is no fear. Moreover, since the continuation of the high probability is limited by the total number of rounds without being performed by the number of special games, the player does not feel dissatisfaction as in the case of performing by the number of special games.

In the pachinko machine 10, the game control device 30, in particular, the CPU 32 functions as a judgment device, a mode change device, a special game execution device, a round number setting device, and an upper limit value setting device. Corresponds to a specific winning device. In this embodiment, the number of rounds executed in the special game, that is, the result is returned to the low probability by reaching the total upper limit, but the number of rounds determined for each special game, not the actual number of rounds May be returned to the low probability when the sum of the upper limits (see S306 in FIG. 7) reaches the total upper limit.

In the embodiment, the upper limit (total upper limit value) of the total number of rounds is set in advance. For example, following the display of the hit that triggered the shift to the high probability,
The round number determination process as shown in FIG. 10 may be executed to determine the total upper limit value in accordance with the symbol used for the winning display.

In the example of FIG. 10, the game control device 30 determines whether the symbol is 333 or 777 (S4).
51) If 333, the total upper limit is determined to be 70 rounds (S453); if 777, the total upper limit is determined to be 80 rounds (S454). If the total upper limit determined in this way is replaced with 80 rounds as the upper limit of the total number of rounds in the embodiment, the same effect as in the embodiment can be obtained. Also, by changing the total upper limit value depending on the symbol, the player can be entertained. In this example, the game control device 30 also functions as a total upper limit value setting unit.

The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to such embodiments, and it can be variously implemented without departing from the gist of the present invention. Needless to say.

[Brief description of the drawings]

FIG. 1 is a front view of a pachinko machine according to an embodiment.

FIG. 2 is an explanatory diagram of the inside of the big win device of the pachinko machine of the embodiment.

FIG. 3 is a block diagram illustrating a control system of the pachinko machine according to the embodiment.

FIG. 4 is a flowchart of a main process executed by a CPU of the pachinko machine of the embodiment.

FIG. 5 is a flowchart of a random number acquisition process executed by the CPU of the pachinko machine of the embodiment.

FIG. 6 is a flowchart of a determination process executed by the CPU of the pachinko machine of the embodiment.

FIG. 7 is a flowchart of a special game process executed by the CPU of the pachinko machine of the embodiment.

FIG. 8 is a flowchart of a round restriction process executed by the CPU of the pachinko machine of the embodiment.

FIG. 9 is an explanatory diagram of a display example of the symbol display device of the pachinko machine of the embodiment.

FIG. 10 is a flowchart of an example of a round number determination process.

[Explanation of symbols]

10 ... Pachinko machine (ball game machine), 12 ... Game board, 14
... Symbol display device, 15 ... Lottery display, 16 ... Start winning port, 17 ... Start sensor, 18 ... Big winning device (specific winning device), 20 ... Liquid crystal display panel, 23 ... V sensor, 24 ... 1
0 ball sensor, 30 ... Game control device (judgment means, mode change means, special game execution means, number of rounds setting means, upper limit value setting means), 32 ... CPU (judgment means, mode change means, special game execution means, round) Number setting means, upper limit value setting means), 44 ... display control device.

Claims (2)

[Claims] 1. A determination means for determining a hit or miss when a determination execution condition is satisfied, and a high probability mode having a higher probability of determining the determination means from a low probability mode to a hit than the low probability mode when a probability variation condition is satisfied. Mode change means to shift the determination means from the high probability mode to the low probability mode when the probability return condition is satisfied, and that the determination means is determined to be a hit as an essential condition,
Activating a specific prize device to make the specific prize device easy to win from a difficult or impossible prize state,
When the operation time of the specific prize device or the number of game balls that have won the specific prize device during the operation of the specific prize device reaches the upper limit, the operation of the specific prize device is terminated as the end of one round, And a special game execution unit that executes a special game that repeats the round once or a plurality of times. In the ball game machine, the probability return condition is determined by a series of the hits determined in the high probability mode. It is a setting that is established even when the total of the number of rounds in the special game reaches a total upper limit, and as an upper limit of the number of rounds for each special game due to the determination of the hit in the high probability mode A ball game machine provided with a round number setting means for setting an upper limit of the number of rounds. 2. The ball game machine according to claim 1, further comprising a total upper limit value setting means for setting said total upper limit value.