JP3872914B2 - Slot machine - Google Patents

Description

[0001]
  This inventionA plurality of reels each having a plurality of symbols arranged thereon and a lottery means for executing a lottery for determining whether or not to win a prize are provided, and each reel is rotated in accordance with the start operation of the player. After that, on the condition that the reel being rotated is stopped within a predetermined number of pieces from the player's stop operation, a control is performed to bring the symbol determined by the lottery into the winning line and stop the reel. The present invention relates to a slot machine that maintains a lottery result until winning a bonus when winning a bonus.
[0002]
[Prior art]
A typical conventional slot machine includes three reels having a predetermined number of symbols arranged on the outer peripheral surface. When the player performs a game start operation, the reels rotate all at once, and the symbols of the reels are displayed in a cyclic manner in the front symbol display window. On the symbol display window, five winning lines, upper, middle, lower, and diagonal, are set, and when each reel is sequentially stopped according to a stop operation by the player, each reel is placed on each winning line. The three symbols are displayed in an aligned state.
[0003]
When a predetermined symbol combination is established on a winning line that is activated when all reels are stopped, a winning is achieved, and the player receives a predetermined number of medals depending on the type of winning.
[0004]
Also, in recent slot machines, lottery is performed inside the control unit in response to the start of each reel, and in response to this lottery, a stop operation is performed so that a predetermined symbol is drawn on the winning line for each reel. Control. In particular, when the lottery is a “hit”, each reel is controlled to stop by drawing a specific symbol such as “7” on the winning line, and the combination of this specific symbol is displayed on the winning line. Once established, the game shifts to a “bonus game” in which a prize appears with high probability.
[0005]
By the way, the above-described symbol pull-in control is determined to be performed within a predetermined number of frames by law, so even if the lottery is won, depending on the reel rotation position at the time of the stop operation There are cases where symbols cannot be pulled in well. For this reason, in the conventional slot machine, if a combination of the specific symbols cannot be established despite the occurrence of a “big hit” due to the lottery, the lottery result is carried over to the next game and the display lamp is turned on. The player is informed of the winning of the bonus winning by using voice output or the like.
[0006]
More recently, a slot machine has been developed in which symbol combinations called “reach eyes” and “pattern eyes” are stopped and displayed on a winning line instead of display or voice notification. The reach is displayed when the symbol combination related to the special prize cannot be stopped on the winning line even though the lottery is “big hit”, and the bonus prize appears with a probability of 100%. Means. On the other hand, the pattern is for informing the probability that a bonus winning will appear, and is set to appear at a predetermined ratio in both cases where the lottery is a win or a loss. . In addition, a large number of symbol combination patterns are set as reach and pattern patterns, and for the pattern patterns, various symbol combination patterns are set for a plurality of winning probabilities.
[0007]
[Problems to be solved by the invention]
The probability of winning the lottery is very low, so even if the jackpot is notified by lamp display, audio output, or reach eyes, this kind of notification is rarely performed, and the player's interest is sufficiently increased. The problem of not being able to occur.
In addition, in order to determine the probability of winning a lottery result or bonus prize, the player must memorize each pattern or check each pattern against a list, etc. A heavy burden on the person. Beginners in particular cannot understand the meaning of reach eyes and pattern eyes sufficiently, and it is very difficult to raise interest in games.
[0008]
In addition, for the pattern, multiple winning probabilities are set as described above, but it is impossible for a skilled person to read the probability of winning a bonus from the pattern of established symbol combinations. Therefore, it is almost impossible for a general player to accurately predict the appearance of a bonus prize.
[0010]
  This invention was made paying attention to the above problems,The possibility of winning a bonus represented by the symbol combination displayed when each reel stopsBy specifically informing the player,The game will enable even general players to accurately predict the appearance of bonus prizes.The purpose is to raise interest in.
[0011]
[Means for Solving the Problems]
  According to the present invention, a plurality of reels each having a plurality of symbols arranged thereon, a lottery means for executing a lottery for determining whether or not to establish a prize, and a bonus prize, which is a lottery result of the lottery, are obtained. Storage means for associating and storing a predetermined number of stop patterns from among a plurality of stop patterns each representing a combination of stop positions for each reel for various winnings and losing, and for each reel When a player performs a stop operation on a rotating reel after being rotated in accordance with the start operation, the reel that has been stopped is selected from the stop patterns limited to the lottery result by the lottery means. Control is performed to select a pattern in which the stop position corresponding to is within a retractable range and stop the reel at the stop position based on the selected pattern. And a control means for preferentially selecting a pattern for causing the symbol combination for winning to appear from among selectable stop patterns when it is determined that the winning is established by the lottery. It was made in a slot machine.
  In the first aspect of the present invention, in the storage means, each stop pattern is assigned a probability that the pattern is selected for the lottery result for each lottery result, and the lottery for each lottery result. The value of each probability is set so that a predetermined number of stop patterns associated with the result are selected with equal frequency. Furthermore, a display unit for displaying the probability of winning a bonus represented by the symbol combination stopped and displayed by the control by the control means, and one stop selected for the stop when all the reels are stopped The probability of bonus winning obtained using all the probabilities assigned to the pattern and the winning probability set in the lottery means for the lottery results corresponding to these probabilities is displayed on the display unit. Display control means.
[0012]
  In the invention of claim 2, the stop patterns for causing various winning symbol combinations to appear among the stop patterns in the storage means are associated only with the respective winnings.
[0013]
  In the invention of claim 3, theThe display shows the probability of winning the bonusIndicator that displays the frequency representingConfigured as
[0014]
  In the invention of claim 4, as the indicator,A numerical value obtained by logarithmically converting the bonus winning probabilityA level indicator that displays the level is used.
[0016]
[Action]
  Claim 1In the invention ofInformation about the probability of winning a bonus represented by a combination of symbols aligned on the winning line when each reel stops is displayed.Regardless of whether or not the bonus is actually won, the probability of fluctuating according to the combination of established symbols is notified each time the game is played.
[0017]
  According to the invention of claim 3,By displaying the probability of winning the bonus represented by the established symbol combination in frequency,The player is clearly notified of the winning probability.
[0018]
  According to a fourth aspect of the present invention,probabilityIs converted into a logarithm and displayed as a level, so that even a small probability can be displayed as if it has a large numerical value.
[0019]
【Example】
FIG. 1 shows an appearance of a slot machine according to an embodiment of the present invention, and FIG. 2 shows an internal structure of the machine body.
The slot machine 1 in the illustrated example is configured such that a door portion 3 is attached to a front opening of a box-shaped main body portion 2 so as to be opened and closed. In the hollow interior of the main body 2, a reel block 4 and a control board 5 on which a control unit to be described later is mounted at an upper position, and a medal having a hopper 6 a that accommodates a large number of medals at a lower position. A dispenser 6 and the like are incorporated.
[0020]
In the reel block 4, three reels 8a, 8b, and 8c are assembled to a metal frame 7 together with stepping motors 9a, 9b, and 9c serving as driving sources. On the outer peripheral surface of each reel 8a, 8b, 8c, a plurality of types of symbols such as symbols, letters, numbers and the like are arranged at equal intervals of 21 each, and some of these symbols are for winning a prize. Construct a winning symbol.
[0021]
The main body of the door portion 3 is constituted by a metal frame having a predetermined thickness, and three panels 11, 12, 13 are provided in the front opening, and a wiring board (not shown) for various displays and operation switches on the rear surface. )) Is assembled.
[0022]
Between the front panel 11 and the lower panel 13, there are various kinds for executing the game, such as a start lever 14, stop button switches 15 a, 15 b, 15 c, bet button switches 17, 18, 19, a settlement switch 22, a changeover switch 23. In addition to the operation switch, a medal slot 16 for directly placing medals into the machine is provided. A medal payout port 25, a medal tray 24, and the like are provided below the lower panel 13.
[0023]
The panels 11, 12, and 13 are formed by performing silk screen printing on the surface of a transparent synthetic resin plate or tempered glass. The upper panel 12 and the lower panel 13 are drawn with model names, game information, and the like. Further, a symbol display unit 20 as shown in FIG. 3 is formed on the central front panel 11.
[0024]
The symbol display section 20 is formed by forming three transparent symbol display windows 20a, 20b, and 20c surrounded by a color print layer on the front panel 11 in a horizontal row. Three reels 8a, 8b, 8c of the reel block 4 are arranged behind the symbol display windows 20a, 20b, 20c with their outer peripheral surfaces facing the symbol display windows 20a, 20b, 20c.
[0025]
Each symbol display window 20a, 20b, 20c has a horizontal length so that each reel 8a, 8b, 8c can be seen, and a vertical length so that three symbols S can be seen when the reel is stopped. In addition, each is formed in a vertically long rectangular shape. Further, on the surface of the front panel 11, three winning lines L1 to L3 crossing each symbol display window 20a, 20b, 20c in the horizontal direction, and two winnings crossing in the diagonal direction of lowering to the right and lowering to the left. Lines L4 and L5 are shown. When the reels are stopped, the three symbols S of the reels 8a, 8b, and 8c are aligned on the winning lines L1 to L5, respectively.
[0026]
The winning lines L1 to L5 are activated according to the number of inserted medals. When the inserted number is 1, only the central winning line L1 is activated, and when the inserted number is 2, The lower three pay lines L1 to L3 are activated. Further, when three medals are inserted, all winning lines L1 to L5 are activated.
[0027]
In this embodiment, a symbol string composed of a predetermined number of symbols is circulated and displayed on the mechanical reels 8a, 8b, and 8c. However, instead of these reels 8a, 8b, and 8c, a belt, The symbol string may be variably displayed by rotating a rotating body such as a disk. In addition, the symbol rows may be displayed in a variable manner by displaying each symbol as an image and scrolling on a display screen of a liquid crystal display panel or CRT display.
[0028]
The slot machine 1 of this embodiment is a credit-type machine that stores a large number of medals in an electronic data format in the body and executes a game while consuming the stored medals. The bet button switch 17 provided on the lower projecting surface is for consuming a game by consuming three stored medals. Further, the bet button switches 18 and 19 provided on the lower vertical surface are for consuming two and one stored medal, respectively. The settlement switch 22 is used to settle the stored medals and pay them out from the medal payout opening 25. The changeover switch 23 is a game mode in which the aircraft is in a credit system or a direct medal insertion from the medal insertion slot 16. It is for switching to either of these.
Note that credit-type slot machines are known, and detailed description thereof is omitted here.
[0029]
Further, in the slot machine of this embodiment, as will be described in detail later, in addition to the “Big Bonus” and “Regular Bonus” bonus winnings, a plurality of types of general winnings are set. Each of these winnings is associated with a predetermined symbol combination, and when one of the winnings is won in a lottery performed by the control unit 30 (shown in FIG. 4) inside the aircraft, the control unit 30 The reels 8a, 8b, and 8c are controlled so as to draw in and stop the winning symbols.
[0030]
In the left lateral position of the symbol display section 20 of the front panel 11, a stored medal number display 26 for displaying the number of medals stored in the aircraft, and the number of medals added as a new stored medal at the time of winning a prize. A winning number display 27 for displaying the number is provided. Further, a winning frequency indicator 28 for displaying the probability of winning a bonus winning by the lottery (details will be described later) is provided at the right lateral position of the symbol display unit 20. These indicators 26, 27, and 28 are constituted by segmented LEDs, liquid crystal display panels, and the like.
[0031]
FIG. 4 shows an electrical configuration of the slot machine 1.
In the figure, reference numeral 30 denotes a control unit composed of a microcomputer, which includes a CPU 32 which is a main body of control and calculation, a ROM 33 storing programs and fixed data, a RAM 34 used for reading and writing data, and a random number generator 35.
[0032]
The CPU 32 is connected to an input unit such as the start lever 14, stop button switches 15 a, 15 b, 15 c, bed button switches 17, 18, 19, settlement switch 22, changeover switch 23, and the number of stored medals via the bus 31. Display devices such as a display device 26, a payout medal number display device 27, and a winning frequency display device 28 are connected. In addition, a reel drive unit 36 that drives the stepping motors 9a, 9b, and 9c, a medal payer 6, a medal detection sensor 37, and the like are connected.
The medal detection sensor 37 is for detecting a medal inserted from the medal insertion slot 16.
[0033]
The CPU 32 reads / writes data to / from the RAM 34 according to a program stored in the ROM 33, controls the operations of the input / output units in series, samples the random number values generated by the random number generator 35, and performs an internal lottery process. Execute. The random number generator 35 of this embodiment randomly outputs an integer value in the range of “1” to “16384”. In the ROM 33, as setting data for each bonus prize or general prize winning probability, A lottery table in which specific random numbers and reel stop patterns are assigned for each winning is stored.
[0034]
In the above configuration, the CPU 32 first activates one of the pay lines according to the medal insertion into the medal insertion slot 16 or the operation of the bed button switches 17, 18, 19. Next, when the start lever 14 is operated, the CPU 32 performs the lottery process and simultaneously drives the reel driving unit 36 to rotate the three reels 8a, 8b, and 8c all at once. Thereafter, each time the stop button switch 15a, 15b, 15c is pressed, the corresponding reel 8a, 8b, 8c is pulled to a predetermined rotational position according to the random number sampled during the lottery process and stopped.
[0035]
In the reel pull-in stop control described above, the reel rotation position is sequentially confirmed for each reel 8a, 8b, 8c while counting the drive signals applied to the corresponding stepping motors 9a, 9b, 9c, and the intended rotation is performed. This is realized by stopping the stepping motors 9a, 9b, 9c when the position is reached, but since this type of control is well known, detailed description thereof will be omitted.
[0036]
FIG. 5 shows an example of the lottery table described above.
In the figure, each bonus winning of a big bonus (hereinafter abbreviated as “BB”) regular bonus (hereinafter abbreviated as “RB”) is displayed with specific symbols such as “7” and “BAR” aligned on the winning line. As a result, the special game with the winning probability set higher than usual can be executed a plurality of times. In this embodiment, 50 random numbers are assigned to both BB and RB so that each bonus prize is won with a probability of 50/16384.
[0037]
Next, the three types of fruit prizes FR1, FR2, and FR3 of the general prize are established in response to the predetermined fruit symbols being arranged and displayed on the winning line, and a predetermined number of medals are paid out. In the illustrated example, 1639 random numbers are assigned to FR1, and 200 random numbers are assigned to FR2 and FR3, respectively. The replay winning (RP) is a winning in which a re-game is performed when a predetermined symbol combination is established, and 2245 random numbers are assigned. Furthermore, the cherry prize (CH) is a prize that is established when the cherry symbol is stopped on the winning line in the symbol display window 20a on the left side, and about 1 to 2 medals are paid out. 3000 random numbers are assigned to this prize.
When 9000 random values other than the random number assigned to each winning are sampled, the lottery is all out (OUT).
[0038]
Further, in this lottery table, in order to represent the probability of winning the lottery by the combination of symbols displayed in a stopped state, the combination mode of symbols established by the stop of each reel is limited for each winning or losing. ing.
[0039]
As described above, since 21 symbols are arranged on each of the reels 8a, 8b, and 8c, the combination pattern of the stop positions of the three reels 8a, 8b, and 8c is 21.^Three= 9261 ways.
In the lottery table of FIG. 5, for various winnings and misses, the stop pattern of each reel 8a, 8b, 8c is limited to a predetermined number of patterns, and the stop position of each reel 8a, 8b, 8c is the reel stop operation position. It is determined according to a limited stop pattern. Of course, the stop pattern for causing a winning symbol combination to appear is set to appear only for that winning.
[0040]
For example, when BB is won in the lottery, each reel 8a, 8b, 8c is set to stop in any one of the 800 patterns out of the 9261 stop patterns. Similarly, when the RB is hit, the stop positions of the reels 8a, 8b, and 8c are determined from among 800 stop patterns. Here, it is assumed that 800 stop patterns are selected at an equal frequency, and the probability p that each pattern appears is p._{BB ・ q}, P_{RB ・ q}Is 1/800 = 0.0013.
[0041]
Similarly, with respect to the general winnings and misses, a predetermined number of patterns are selected from 9261 stop patterns, and each reel 8a, 8b, 8c is set to stop with any of these stop patterns. Yes. With such a setting, the symbol combination represented by each of the 9261 stop patterns represents the winning probabilities of various winnings.
[0042]
For example, the first stop pattern appears with a probability of 1/800 when BB is hit or appears with a probability of 1/1000 when FR1 is hit. Probability P when BB is hit when pattern appears_{1 ・ BB}Is P_{1 ・ BB}= {(50/16384) × 0.0013} / {(50/16384) × 0.0013 + (1639/16384) × 0.001)} = 0.038, which is 3.8%. In addition, since this stop pattern is not adopted in RB, the probability P that RB is hit_{1 ・ RB}Is 0%.
[0043]
The third stop pattern appears when any one of BB, RB, and FR3 is a win, and the probability that this stop pattern appears for each win is 1/800. Probability P that BB or RB is hit when stop pattern appears_{3 ・ B}Is P_{3 ・ B}= {(50/16384) × 0.0013}× 2/{(50/16384)×0.0013×2+(200/16384)×0.0013}=0.333More about33%It becomes.
[0044]
On the other hand, since the second stop pattern is set to appear only when BB hits, the probability P that BB hits when this stop pattern appears_2.BBIs 100%. Note that the symbol combination established by the stop pattern in this case is either a symbol combination related to BB or a combination of “reach eye” symbols for notifying that BB is hit.
[0045]
Depending on the arrangement of the symbols, there are stop patterns in which two types of winnings are established at the same time. Such a stop pattern can be selected by lottery as shown in the 9261st stop pattern column in the figure. Not adopted for results. Therefore, the reels 8a, 8b, and 8c are controlled so as not to stop at the stop pattern regardless of the lottery result.
[0046]
The reel pull-in control according to the lottery described above is normally performed within a predetermined number of frames (usually within four frames). When the lottery is a win, basically, each of the limited stops A stop pattern for establishing the winning prize is selected from the patterns. However, when the reel cannot be pulled to the target stop position due to the reel stop operation position, another limited stop pattern is employed.
[0047]
In addition, when a general winning is won, the pull-in control for establishing the symbol combination related to the winning is performed only once, but for each BB or RB bonus winning, the lottery result is displayed until the winning is established. In the meantime, the reels 8a, 8b, and 8c are controlled to stop with any of the above-described 800 stop patterns.
[0048]
In the slot machine of this embodiment, every time the game is executed, when each reel 8a, 8b, 8c stops, the winning probability of winning the bonus winning represented by the established symbol combination is displayed on the winning frequency display 28. I am doing so.
[0049]
According to the 9261 stop patterns described above, since it is considered that there are a plurality of stop patterns for establishing the same symbol combination, the winning probability displayed on the hit frequency indicator 28 is determined by each stop pattern described above. The probability that each BB or RB is hit may be added. However, the present invention is not limited to this, and even when the same symbol combination is stopped, the winning probability corresponding to the adopted stop pattern may be displayed each time.
[0050]
FIG. 6 shows an example of this probability display. The hit frequency indicator 28 in the illustrated example is configured to digitally display a numerical value of up to three digits by the LED 28a arranged in a segment, and indicates that BB or RB has a probability of 33%.
It is not easy to determine how much the bonus winning is won by the combination of symbols established by the stop of each reel 8a, 8b, 8c, but if the winning probability is displayed as a specific numerical value in this way. Therefore, it is possible to easily recognize the possibility of a bonus winning being a beginner, and proceed with the subsequent games with the expectation of the establishment of BB and RB.
[0051]
This probability display is performed regardless of whether or not the bonus prize is won in the actual lottery, and also varies depending on the established stop pattern each time the game is performed, so the displayed probability also varies from game to game. Will do. Accordingly, the player can pay attention to the probability display while feeling irritated whether he / she really has won the bonus prize, and can further enhance the interest of the game.
[0052]
Note that the numerical value displayed here is not necessarily an accurate numerical value. For example, a numerical value rounded up or down by 10% may be displayed. Further, the probability may be analogly displayed by using a level display having a scale instead of the digital display.
Furthermore, the player's sense of expectation can be further enhanced by changing the display color in accordance with the probability and outputting the sound effect along with the display.
[0053]
FIG. 7 shows an example in which the hit frequency display is constituted by a level display. This indicator is designed to display the probability within the range of 0 to 100% by logarithmic conversion. The center position in the setting direction of the scale corresponds to the probability of 10%, and the level value increases as the probability increases. The fluctuation is set to be gentle.
In this way, if the winning probability is logarithmically converted and displayed in analog, even a small probability can be expressed at a large level, emphasizing the possibility of winning a bonus and enhancing the player's expectation Can do.
[0054]
If the player actually wins a bonus prize by lottery, in addition to the display of the probability, the winning per lottery may be notified by a sound effect or a lamp display. However, if this notification is performed before the probability display, the effect of the display will fade, so it will be performed after a predetermined time has elapsed since the probability display was performed, or the notification will be removed in the first game where the lottery was won Is desirable. If a bonus win is won and a probability of 100% or a predetermined value or more is displayed, the player will be confident that the player will win the bonus win by holding the display until the bonus win is established. You may make it make it. On the other hand, each time a new game is started, the probability display in the previous game may be erased to give the player an impression that the winning probability varies from moment to moment.
[0055]
Further, in the above embodiment, the probability of winning a bonus winning of either BB or RB is displayed, but only the winning probability of winning one of the bonus winnings may be displayed. The winning probability may be displayed individually. When displaying the winning probabilities individually, a winning frequency indicator may be set for each winning and the winning probabilities for BB and RB bonus winnings may be displayed at the same time. You may make it display each winning probability continuously using a device. In this case, if display is performed with different display colors for each winning prize, confusion among players can be avoided, and the effect can be enhanced.
[0056]
In the above embodiment, the winning probability represented by the combination of the symbols displayed in a stopped state is displayed. Instead of this, a predetermined probability is set regardless of the actual winning probability, and the winning frequency indicator May be displayed. The display in this case is not limited to when the reels 8a, 8b, and 8c are stopped, but may be performed when the reels 8a, 8b, and 8c are rotating. May be performed in response to the display of a predetermined symbol such as “” on the winning line. In addition, when the player actually wins BB or RB, the player's expectation for the bonus winning can be increased by gradually setting the displayed probability until the winning is established. .
[0057]
Further, in each of the embodiments shown in FIGS. 6 and 7, the frequency indicating the winning probability for the special prize is notified to the player by numerical display or level display. Instead, notification by voice is performed. May be. This type of winning probability notification is applicable not only to slot machines, but also to all variable symbol display machines that are set to stop the display of symbol strings in accordance with the results of internal lottery, such as pachinko machines. It is possible.
[0059]
【The invention's effect】
  According to the first aspect of the present invention, since the bonus winning probability represented by the established symbol combination is calculated and displayed according to the stop of each reel, even a player who cannot understand the meaning of reach eyes or pattern eyes , You can recognize how much you could win a bonus prize andYou can enjoy the game while raising your expectations.
[0060]
  According to the invention of claim 3,Displays the frequency indicating the probability of winning the bonusTherefore, the winning probability can be clearly notified to the player.
[0061]
  According to a fourth aspect of the present invention,probabilityIs converted into a logarithm and displayed as a level, so that even a small probability can be displayed as if it has a large numerical value, and the player's sense of expectation for winning can be amplified.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an appearance of a slot machine according to one embodiment of the present invention.
FIG. 2 is a front view showing an internal structure of the slot machine.
FIG. 3 is a front view showing a configuration of a front panel.
FIG. 4 is a block diagram showing an electrical configuration of the slot machine.
FIG. 5 is an explanatory diagram showing an example of a lottery table.
FIG. 6 is a front view showing an embodiment of a hit frequency display.
FIG. 7 is a front view showing another embodiment of the hit frequency display.
[Explanation of symbols]
1 slot machine
S symbol
8a, 8b, 8c reel
28 Per-frequency indicator
30 Control unit
32 CPU

Claims (4)

A plurality of reels each having a plurality of symbols arranged thereon;
Lottery means for executing a lottery for determining whether or not to win a prize;
A predetermined number of stop patterns limited from a plurality of stop patterns each representing a combination of stop positions for each reel are stored in association with various winnings and winnings including bonus winnings, which are lottery results of the lottery. Storage means for
After each reel is rotated in accordance with the player's start operation, when the player's stop operation is performed on the rotating reel, the stop pattern is limited to the lottery result by the lottery means. The stop position corresponding to the reel that has been stopped is selected within a retractable range, and control is performed to stop the reel at the stop position based on the selected pattern, and a prize is awarded in the lottery. When it is determined to be established, in a slot machine comprising control means for preferentially selecting a pattern for causing the symbol combination for winning to appear from among selectable stop patterns,
In the storage means, each stop pattern is assigned a probability that the pattern is selected for the lottery result for each lottery result, and a predetermined value associated with the lottery result for each lottery result. As the number of stop patterns are selected with equal frequency, each probability value is set,
A display unit for displaying a probability of winning the bonus represented by the symbol combination stopped and displayed by the control by the control unit;
When all reels are stopped, all the probabilities assigned to one stop pattern selected for the stop and the lottery results corresponding to these probabilities are set in the lottery means. A slot machine comprising: display control means for displaying on the display section a bonus winning probability obtained using a winning probability. 2. The slot machine according to claim 1, wherein among the stop patterns in the storage means, stop patterns for causing various winning symbol combinations to appear are associated with only the winnings. The slot machine according to claim 1 , wherein the display unit is configured as a display that displays a frequency representing the probability of winning the bonus . 4. The slot machine according to claim 3, wherein the display is a level display that displays a level of a numerical value obtained by logarithmically converting the bonus winning probability .

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