JPH10230039A - Game device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it hardly cause the advantages and disadvantages of a game by a feeding point number and to enable a player to enjoy the game at ease by changing the extraction probability of at least a part of symbols for respective symbol tables and making pay-out rates for the respective tables almost equal. SOLUTION: This device is provided with the symbol tables 14a and 14b to which the list of the symbols is registered, a symbol extraction part 14d for extracting the symbol from the symbol tables 14a and 14b at random and a display control part 14e for displaying the symbol extracted in the symbol extraction part 14d at a display window. The plural number of pieces of the symbol tables 14a and 14b are arranged corresponding to the feeding point number which is betting money and the extraction propability of at least a part of the symbols is changed so as to make the pay-out rates for the respective tables be almost the same for the respective symbol tables 14a and 14b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game machine for determining the presence or absence of a prize based on a combination of symbols displayed on a display window.

[0002]

2. Description of the Related Art In a slot machine game, which is an example of a game machine, a coin or a medal is inserted into a coin insertion portion provided in a slot machine body, and a plurality of types of symbols are drawn on an outer periphery by operating a start lever or the like. It starts by spinning several reels simultaneously. On these reels, the same number of symbols are drawn on the outer surface,
The presence or absence of a prize and the number of coins to be paid out are determined by the combination of symbols arranged in the display window when each reel stops.

Here, the types of slot machine games mainly include a buyer-pay type game and a multi-coin game. The buyer-pay-type game is a type of game in which the number of winning symbol arrays increases as the number of coins or the like inserted in one game (hereinafter, bet number) increases. For example, "Blue7"-"Blue7"-
For one or two bet symbols such as “Blue7”, no coin is refunded as a loss if the number of bets is one or two, and coins are refunded as a winning if the number of bets is three.

[0004] The multicoin game is a type of game in which the number of winning symbol arrays does not change even if the number of bets increases, and the number of coins paid out increases in proportion to the number of bets. For example, if the payout number when winning with one bet is 30, the payout number with two bets when winning with the same symbol row is 60.

[0005]

However, in a buyer-pay type game, when the number of bets increases, the payout rate (payout rate) changes, and there is a problem that the game is advantageous or disadvantageous depending on the number of bets. For example, when the bet number is one, the winning symbol string is set to “3Bar” − “3
"Bar"-"3Bar", "2Bar"-"2Bar"
-"2Bar", "1Bar"-"1Bar"-"1B"
ar "," AnyBar "-" AnyBar "-" An "
yBar "," Blank "-" Blank "-" Bl
ank ”and the number of refunds is 60 each, 4
The number of hits for all combinations (262144) was 21 for each of 0, 20, 10, and 21 sheets.
In the case of 6, 528, 1680, 15720, and 14904, the number of coins to be inserted to issue all combinations is 1 × 262144 = 262144, and the total number of payout coins when all combinations are issued is , 6
0 sheets × 216 + 40 sheets × 528 + 20 sheets × 1680 + 1
0 × 15720 + 1 × 14904 = 239784. As a result, when the number of bets is one, the payout rate is 239784/262144 × 100 = 9
1.47% (When the number of bets is two, the payout rate is also 9 by doubling the number of refunds.
1.47%).

On the other hand, when the number of bets is three, the winning symbol sequence is represented by "Blue7"-"Blue7"-
"Blue7", "Red7"-"Red7"-"Re
d7 "," Any7 "-" Any7 "-" Any7 ",
"3Bar"-"3Bar"-"3Bar", "2Ba"
r "-" 2Bar "-" 2Bar "," 1Bar "-
"1Bar"-"1Bar", "AnyBar"-"A
nyBar "-" AnyBar "," Blank "-
Eight types of "Blank"-"Blank", and the number of refunds are 1000, 100, 100, and 12 respectively.
The number of hits for all combinations of symbols (262144 patterns) is 64, 729, 1404, 216, and 52, respectively.
In the case of 8, 1680, 15720, and 14904, the number of coins to be inserted to issue all combinations of symbols is 3 × 262144 = 786432, and the total number of coins refunded when all combinations of symbols are issued. The number is 1000 x 64 + 100 x 729 + 100
Sheets × 1404 + 120 sheets × 216 + 80 sheets × 528 + 4
0 sheets x 1680 + 20 sheets x 15720 + 2 sheets x 1490
4 = 756868 sheets. As a result, the payout rate when the number of bets is 3 is 756868/78643.
2 sheets × 100 = 96.24%.

Thus, the payout rate when the number of bets is one or two is 91.47%, whereas the payout rate when the number of bets is three is 96.24%.
This indicates that playing the game with three bets is more advantageous than playing the game with one or two bets.

On the other hand, in a multicoin game, the number of coins paid out increases in proportion to the number of bets, so that the payout rate remains the same even if the number of bets increases. Therefore, there is no inconvenience as in the buyer-pay type game, but the gambling property of the game is poor. In other words, the player increases the number of bets in expectation of a big hit, but the hit rate of the winning symbol string is constant regardless of the number of bets, and the larger the number of bets, the easier the big hit is. Do not mean. For this reason, many players have to insert coins or the like one by one to play, and it has been difficult to satisfy the player's expectation of the jackpot.

An object of the present invention is to solve the above-mentioned problem and to provide a game apparatus in which the number of bets hardly causes a disadvantage in a game and which can satisfy a player's expectation of a jackpot. .

[0010]

In order to solve the above-mentioned problems, a game apparatus according to the present invention has a display window for displaying a plurality of symbols arranged side by side, based on a combination of the symbols displayed on the display window. A symbol table in which a list of symbols is registered; a symbol extraction unit that randomly extracts the symbols from the symbol table;
A display control unit for displaying the symbols extracted by the symbol extraction unit on the display window. The symbol table has a plurality of symbol tables corresponding to the number of points to be paid, and each symbol table has a payout rate for each table. It is characterized in that the extraction probabilities of at least some of the symbols are changed so as to be substantially the same.

Since the present invention has such a configuration, when a player inserts a coin, for example, one of the corresponding symbol tables is selected with the inserted coin as an insertion point. Then, the symbols are randomly extracted from the selected symbol table by the symbol extraction unit, and the extracted symbols are displayed on the display window by the display control unit.

Here, in each symbol table, the extraction probability of at least a part of the symbols is changed, and the payout rate for each table becomes substantially equal. For this reason, the advantage and disadvantage of the game hardly occur depending on the number of input points, and the player can enjoy the game with peace of mind.

Also, by changing the extraction probability of at least a part of the symbols registered in each symbol table, the hit ratio by the desired symbol combination is changed for each insertion point while the payout ratio is kept substantially the same. It is also possible. If such a symbol table is used, a big hit can be easily made when the number of input points is increased, and the player's expectation of the big hit can be sufficiently satisfied.

Here, in each symbol table, it is preferable that the extraction probabilities of at least some of the symbols are changed by partially registering the symbols.
When such a configuration is adopted, the symbols registered in duplicate have a higher extraction probability than other symbols. Therefore, the payout rate in each symbol table can be easily adjusted to the same.

On the inner side of the display window, a plurality of cylindrical rotating reels having symbols arranged on the outer peripheral surface are arranged with their axes aligned. The display controller displays the symbols extracted by the symbol extractor. It is preferable that the plurality of rotating reels are stopped so as to be arranged in opposition to the window. When such a configuration is employed, the plurality of rotating reels arranged in alignment with each other rotate when a player inserts a coin, for example. Next, when symbols are extracted by the symbol extraction unit, the same symbols as those symbols are selected from a plurality of symbols arranged on the outer peripheral surface of each rotating reel. When each of the selected symbols reaches a position facing the display window, the display control unit stops each of the rotating reels. As a result, the symbols extracted by the symbol extraction unit are displayed on the display window.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a game machine according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view showing a slot machine 1 which is a game machine according to the first embodiment. As shown in FIG. 1, the slot machine 1 includes a case 2 having a rectangular parallelepiped shape, and a display window 3 for displaying a three-digit symbol is provided in the front center of the case 2. Beneath the display window 3, a coin number display section 4 for displaying the number of coins paid out, the total number of coins, and the number of coins inserted in a line, a coin slot 5 for inserting coins as a latch, and a plurality of switches. And a game switch section 6 composed of Here, the game switch section 6 includes a payout switch 6a, a bet switch 6b, a max bet switch 6c, and a start switch 6d. A coin outlet 7 for paying out coins obtained in the game is provided below the game switch section 6. Further, a start lever 8 is provided on a side surface of the case 2, and a game can be started by a player operating one of the start lever 8 and the above-described start switch 6a.

Inside the case 2, three cylindrical rotating reels 9, 10, 11 shown in FIG. 2 are arranged side by side with their axes aligned. A plurality of symbols such as “Blue 7”, “1 BAR”, and “3 BAR” are circumferentially arranged on the outer peripheral surface of each of the rotating reels 9, 10, and 11. Then, the symbols arranged on the respective rotating reels 9, 10, 11 can be displayed side by side on the display window 3 by making the respective rotating reels 9, 10, 11 face the display window 3. As shown in FIG. 3, the symbols arranged on the rotating reels 9 are partially different from the symbols arranged on the rotating reels 10 and 11. Therefore, the three-digit symbols displayed in the display window 3 are changed in different orders, so that the player playing the game is not bored.

Next, the circuit configuration of the slot machine 1 will be described with reference to FIG. As shown in FIG. 4, the slot machine 1 includes an MPU 13, a ROM 14, and a RAM 15
, A coin detecting unit 17 for detecting coins inserted from the coin insertion slot 5, and a hopper 18 for controlling coins to be paid back to the coin ejection slot 7.

The main board 16 includes an input port 19 for inputting a detection signal from the game switch section 6 and the coin detecting section 17, an output port 21 for outputting a driving signal to the hopper 18 and the driving member group 20, A display unit 22 for controlling display of the display unit 4; The main board 16 includes a pulse generator 23 that supplies a clock pulse to the MPU 13, a random number generator 24 that supplies random number data to the MPU 13, a stepping motor 25 included in each of the rotating reels 9, 10, and 11. 2
And a motor control unit 28 for controlling the driving of the motors 6 and 27.

Light-shielding pieces 9a, 10a, and 11a are protruded from the peripheral edges of the rotating reels 9, 10, and 11, respectively. Photo sensors 29, 30, and 31 are provided at positions facing the light shielding pieces 9a, 10a, and 11a, respectively. Then, each time each of the rotating reels 9, 10, and 11 makes one rotation, each of the photosensors 29, 30, and 31 is shielded from light by the light-shielding pieces 9a, 10a, and 11a. Due to this light blocking, detection signals are output from the photo sensors 29, 30, and 31, and from these detection signals, the rotation reels 9,
The positions of 10, 11 can be grasped. The detection signal is given to the MPU 13, and the MPU 13 performs the positioning of the rotating reels 9, 10, and 11 based on the detection signal.

The ROM 14 has two symbol tables 14a, 1a each storing a list of symbols of three digits.
4b, a winning table 14c storing a list of winning symbol columns, a symbol extracting program 14d as a symbol extracting unit for randomly extracting three digits of symbols,
A reel control program 14e, which is a display control unit that controls the stop position of each of the rotating reels 9, 10, and 11, is stored.

Here, each symbol table 14a, 14
b is a table provided for each bet number (insertion point number) which is the number of coins inserted in one game, and the table referred to when the number of bets is one or two is the symbol table 14a. The table referred to when the number of bets is three is the symbol table 14b. In each of the symbol tables 14a and 14b, the extraction probabilities of some of the symbols are changed so that the payout rates of the tables become substantially the same. For this reason, the payout rate becomes substantially constant regardless of the bet number, and the game does not become advantageous or disadvantageous depending on the bet number.

It is assumed that the slot machine 1 can play a buyer pay type game. Here, switching between the buyer pay type game and the multi-coin game can be easily performed by changing the winning table 14c. In other words, using the winning table 14c in which a plurality of winning symbol arrays are stored for each number of bets, the game becomes a buyer-pay type game, in which only a single winning symbol array is stored regardless of the number of bets. With the use of the table 14c, a multicoin game is realized.

Therefore, as shown in FIG.
4c shows a winning symbol row list A for 1 or 2 bets.
And a winning symbol string list B for three bets. Specifically, the winning symbol sequence list A for the number of bets 1 or 2 is “3Bar” − “3Bar” − “3Bar”.
Bar "," 2Bar "-" 2Bar "-" 2Ba "
r "," 1Bar "-" 1Bar "-" 1Bar ",
"AnyBar"-"AnyBar"-"AnyBa"
r "," Blank "-" Blank "-" Blank "
The five types “k” are stored in the winning table 14c.
Also, as a winning symbol string list B for three bets,
"Blue7"-"Blue7"-"Blue7",
"Red7"-"Red7"-"Red7", "Any
7 "-" Any7 "-" Any7 "," 3Bar "-
"3Bar"-"3Bar", "2Bar"-"2Ba"
r "-" 2Bar "," 1Bar "-" 1Bar "-
"1Bar", "AnyBar"-"AnyBar"-
"AnyBar", "Blank"-"Blank"-
Eight types of "Blank" are stored in the winning table 14c.

Note that Any7 represents either Blue7 or Red7, and AnyBar represents 3Bar and 2Bar.
And 1 Bar.

Next, the operation of the slot machine 1 will be described. First, when a player inserts a coin through the coin insertion slot 5, the number of inserted coins is displayed on the coin number display section 4. The total number of coins increased by the insertion of the coins is also displayed on the coin number display section 4. If the current total number of coins is two or more, the bet switch 6b is turned on to increase the number of bets. When the current total number of coins is three or more (when the number of max bets is three), the max bet switch 6c is turned on, and the maximum number of bets can be three. Here, if the player presses the bet switch 6b or the max bet switch 6c, the game can be performed with a desired number of bets.

Next, when the player pulls the start lever 8 or presses the start switch 6b, a detection signal is given to the MPU 13 via the input port 19. Upon receiving the detection signal, the MPU 13 controls the motor control unit 2
8, and the motor control unit 28 drives each of the stepping motors 25, 26, 27. As a result, the spinning reels 9, 10, and 11 start spinning, and the three-digit symbols displayed on the display window 3 start to change.

Each of the rotating reels 9, 10, and 11 stops after rotating a predetermined number of times.
13 is performed by the symbol extraction program 14d. The symbol extraction program 14d is stored in a ROM
14 are stored in the two symbol tables 14a and 14
One table is selected from b in accordance with the number of bets, and a three-digit symbol is extracted from this table using the random number value generated by the random number generation unit 24 as a key.

When three-digit symbols are extracted by the symbol extraction program 14d, information on these symbols is given to the reel control program 14e. Then, in the reel control program 14e, each of the rotating reels 9 and 1 is displayed so that these symbols are displayed in the display window 3.
Stop 0, 11 at the desired position. The reel control program 14e further determines whether or not the three-digit symbol extracted by the symbol extraction program 14d is a winning symbol sequence with reference to the winning table 14c. As a result, when it is determined that the three-digit symbol extracted by the symbol extraction program 14d is a winning symbol sequence,
The number of refunds in the winning symbol row (number of earned points)
Only, the total number of coins displayed on the coin number display section 4 is increased.

Further, when the player pulls the start lever 8 or presses the start switch 6b, the next game can be started. Further, the player can receive a refund of coins by pressing the payout switch 6a.

Next, symbol extraction by the symbol extraction program 14d will be described in detail. As described above, the symbol extraction program 14d extracts symbols by referring to the different symbol tables 14a and 14b for each number of bets. Here, the number of bets is 1, 2
The symbol table 14a referred to when a sheet is used has the following structure.

−−−−−−−−−−−−−−−−−−−−−−−−−− Number of symbol digits First digit Second digit Third digit −−−−−−−−−− ------------------------------------ Blue 7 4 4 4 Red 7 9 9 9 3 Bar 3 6 7 2 Bar 9 9 5 1 Bar 9 16 18 Blank 30 20 21 21-------------------------------- −−−−−−−−−−−−−−−−− Total 64 64 64 −−−−−−−−−−−−−−−−−−−−−−−−−−−− That is, in the symbol table 14a, Are four “Blue7” and nine “Red7” as first digit candidate symbols.
, 3 “3Bar”, 9 “2Bar”, “1B
9 "ar" and 30 "Blank" are registered in duplicate. Then, one symbol is extracted from these candidate symbols based on the random number value generated by the random number generator 24. Here, since the extraction probability of each candidate symbol is equal, the extraction probability increases as the number of registered symbols increases. The extraction probability of each symbol is 1/16 for “Blue7”, 9/64 for “Red7”, and 3 for “3Bar”.
/ 64, "2Bar" is 9/64, "1Bar" is 9 /
64, “Blank” becomes 15/32.

In the symbol table 14a, four "Blue7" and "R
9 “ed7”, 6 “3Bar”, 9 “2Bar”, 16 “1Bar”, and 20 “Blank” are registered. As a result, the extraction probability of each symbol is
"Blue7" is 1/16, "Red7" is 9/64,
"3Bar" is 3/32, "2Bar" is 9/64,
“1Bar” is １ ／, and “Blank” is 5/16.

Further, in the symbol table 14a, 3
Four “Blue7” as candidate symbols of the digit,
9 “Red7”, 7 “3Bar”, “2Ba”
5 “r”, 18 “1Bar”, and 21 “Blank” are registered. As a result, the extraction probability of each symbol is 1/16 for “Blue7” and 9/9 for “Red7”.
64, "3Bar" is 7/64, "2Bar" is 5/6
4, "1Bar" is 9/32, "Blank" is 21 /
64.

The symbol table 14b referred to when the number of bets is three has the following structure.

−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− Blue 7 75 4 Red 7 9 9 9 9 3 Bar 6 6 6 2 Bar 9 8 5 1 Bar 8 9 10 Blank 25 26 30---------------------------------------------------------------------------------------------------------------- −−−−−−−−−−−−−−−−− Total 64 64 64 −−−−−−−−−−−−−−−−−−−−−−−−−−−− That is, in the symbol table 14a, Are “Blue7” and “Red7” are 9 as first digit candidate symbols.
, 6 “3Bar”, 9 “2Bar”, “1B
8 “ar” and 25 “Blank” are registered in duplicate. As a result, the extraction probability of each symbol is “B
“le7” is 7/64, “Red7” is 9/64, “3
"Bar" is 3/32, "2Bar" is 9/64, "1B"
"ar" is 1/8 and "Blank" is 25/64.

In the symbol table 14a, five "Blue7" and "R
10 "ed7", 6 "3Bar", "2Bar"
8 are registered, 9 "1Bar" are registered, and 26 "Blanks" are registered. As a result, the extraction probability of each symbol is
"Blue7" is 5/64, "Red7" is 5/32,
"3Bar" is 3/32, "2Bar" is 1/8, "1
“Bar” is 9/64, and “Blank” is 13/32.

Further, the symbol table 14a has
Four “Blue7” as candidate symbols of the digit,
9 “Red7”, 6 “3Bar”, “2Ba”
5 “r”, 10 “1Bar”, and 30 “Blank” are registered. As a result, the extraction probability of each symbol is 1/16 for “Blue7” and 9/9 for “Red7”.
64, "3Bar" is 3/32, "2Bar" is 5/6
4, "1Bar" is 5/32, "Blank" is 15 /
It becomes 32.

As described above, the symbol tables 14a and 14b have different symbol extraction probabilities. For example, the symbol table 14a
The extraction probability of the first digit “Blue7” is 1/16
Whereas 1 in the symbol table 14b
The extraction probability of the digit “Blue7” is 7/64. In addition, the second digit “Blue7” and the second digit “Red”
7 ", 1st and 3rd digit" 3Bar ", 2nd digit" 2Ba "
r ", 1st digit" 1Bar ", 1st digit" Bl "
The extraction probabilities in “ank” are different from each other.

As described above, by changing the symbol extraction probability in the symbol table 14a and the symbol table 14b, the number of bet symbols is one or two despite the fact that the number of winning symbol columns differs depending on the number of bets. Is almost the same as the payout rate when the number of bets is three.

That is, when the number of bets is one, all combinations of symbols (64 ×
“3Bar” for 64 × 64 = 262144 ways)
-"3Bar"-The number of hits of "3Bar" is three in the first digit of "3Bar" in the symbol table 14a.
Since the second digit is 6 and the third digit is 7, 3 × 6 ×
7 = 126. Similarly, “2Bar” − “2Ba”
r ”−“ 2Bar ”hits are 9 × 9 × 5 = 405,
The number of hits of “1Bar” − “1Bar” − “1Bar” is 9 × 16 × 18 = 2592, “AnyBar” − “A
nyBar ”-“ AnyBar ”is (3 + 9
+9) × (6 + 9 + 16) × (7 + 5 + 18) -126
−405−2592 = 16407, “Blank” −
"Blank"-"Blank" hits 30x2
0 × 21 = 12600.

Here, "3Bar"-"3Bar"-
The number of coins refunded when "3Bar" is completed is 6
0 coins, 40 coins are refunded when "2Bar"-"2Bar"-"2Bar" are collected, and "1Ba"
r ”-“ 1Bar ”-“ 1Bar ”, the number of coins to be paid out is 20,“ AnyBar ”-“ An ”
When "yBar"-"AnyBar" is completed, the number of coins refunded is 10, "Blank"-"Blan"
Assuming that the number of coins refunded when “k”-“Blank” is completed is one, the total number of coins refunded when all combinations of symbols are issued is 60 × 126 + 4.
0 sheets × 405 + 20 sheets × 2592 + 10 sheets × 16407
+1 sheet × 12600 = 252270 sheets.

The number of coins to be inserted in order to put out all combinations of symbols is 1 × 262144 = 262
It is 144 sheets. As a result, the payout rate when the number of bets is one is 252270 ÷ 262144 × 100 =
96.23%.

Next, when the number of bets is two, since the same symbol table 14a is used as when the number of bets is one, the hit rate of each winning symbol row is the same as when the number of bets is one. It is. In addition, the number of coins paid out when the winning symbol arrays are aligned is twice as large as when the number of bets is one. Therefore, the total number of refunded coins when all the symbol combinations are issued is 120 × 12
6 + 80 sheets × 405 + 40 sheets × 2592 + 20 sheets × 16
407 + 2 sheets × 12600 = 504540 sheets. Further, the number of coins to be inserted in order to put out all combinations of symbols is 2 × 262144 = 524288. As a result, the payout rate when the number of bets is two is 504540/524288 × 100 = 96.23.
%.

Next, when the number of bets is three, all combinations (64 ×
64 × 64 = 262144 ways)
7 "-" Blue7 "-" Blue7 "
7 × 5 × 4 = 140 because the first digit of “Blue7” in the symbol table 14b is seven, the second digit is five, and the third digit is four. Similarly, "Red7"
-"Red7"-Hit number of "Red7" is 9x10x
9 = 810, "Any7"-"Any7"-"Any
7 ”is (7 + 9) × (5 + 10) × (4+
9) -140-810 = 2170, "3Bar"-"3
The number of hits of “Bar” − “3Bar” is 6 × 6 × 6 = 21
6, the number of hits of “2Bar” − “2Bar” − “2Bar” is 9 × 8 × 5 = 360, “1Bar” − “1Bar”
r "-" 1Bar "hit count is 8 x 9 x 10 = 72
0, "AnyBar"-"AnyBar"-"AnyB"
ar ”is (6 + 9 + 8) × (6 + 8 + 9) ×
(6 + 5 + 10) -216-360-720 = 981
3. "Blank"-"Blank"-"Blank"
Is 25 × 26 × 30 = 19500.

Here, "Blue7"-"Blue7"
-The number of coins to be refunded when "Blue 7" is completed is 1000, "Red 7"-"Red 7"-"Red
7 "when 100 coins are refunded,
"Any7"-"Any7"-100 coins are refunded when "Any7" is completed, "3Bar"-
"3Bar"-120 coins are refunded when "3Bar" is completed, "2Bar"-"2Bar"-
Set the number of coins refunded when "2Bar" is completed to 8
0 coins, 40 coins are refunded when "1Bar"-"1Bar"-"1Bar" are collected, and "AnyB"
ar "-" AnyBar "-" AnyBar ", the number of coins refunded is 20," Blank "
Assuming that the number of coins to be repaid when “Blank” is equal to “Blank” is two, the total number of coins to be repaid when all symbol combinations are issued is 100
0 sheets × 140 + 100 sheets × 810 + 100 sheets × 2170
+120 sheets × 216 + 80 sheets × 360 + 40 sheets × 720
+20 sheets x 9813 + 2 sheets x 19500 = 756780
It becomes a sheet.

The number of coins to be inserted in order to put out all combinations of symbols is 3 × 262144 = 786
There are 432 sheets. As a result, the payout rate when the number of bets is 3 is 756780/786432 × 100 =
96.23%.

From the above calculations, it can be seen that the payout rate when the number of bets is one or two and the payout rate when the number of bets is three are both equal to 96.23%. For this reason, the advantage and disadvantage of the game hardly occur depending on the number of bets,
The player can enjoy the game with peace of mind. Also,
Only when the number of bets is set to three, the winning symbol row of the jackpot is "Blue7"-"Blue7"-"Blue"
e7 "," Red7 "-" Red7 "-" Red7 ",
Since “Any7” − “Any7” − “Any7” becomes effective, it is possible to satisfy the player's expectation of the jackpot.

Next, an example in which the slot machine 1 is applied to a multi-coin game will be described. As described above, the change from the buyer pay type game to the multi-coin game is easily realized by using the winning table 14c in which only a list of a single winning symbol sequence is stored. That is, as shown in FIG. 6, a single winning symbol string list C is stored in the winning table 14c for the multi-coin game, and by referring to the winning symbol string list C regardless of the number of bets. , Can function as a multi-coin game.

"Blue7" is displayed in the winning symbol string list C.
-"Blue7"-"Blue7" is included, so "Blue7"-"Blue" regardless of the number of bets
7 "-" Blue7 "becomes a winning symbol sequence. Here, "Blue7"-"B" when the number of bets is one or two
"Blue7"-"Blue7"-when the number of bets is 3 compared to the number of hits "blue7"-"Blue7"-
If the symbol tables 14a and 14b are adjusted so that the number of hits of "Blue 7" is increased, the probability of a large bet with three bets increases and the player's expectation of the large hit can be satisfied. However, when adjusting the symbol tables 14a and 14b in this way,
The payout rate should be considered so as not to change with the number of bets.

When the number of bets is one or two, "Bl
ue7 "-" Blue7 "-" Blue7 "when the number of bets is 3 compared to the number of hits of" Blue7 "-
If the symbol tables 14a and 14b are adjusted so that the number of hits of "Blue7"-"Blue7" becomes low,
It is a game that is hard to hit, but can be played for a long time. In this way, by adjusting the symbol tables 14a and 14b, a plurality of games having different characteristics can be realized.

(Second Embodiment) Next, a video type slot machine which is a game machine according to a second embodiment will be described. The appearance of this slot machine is almost the same as that of the slot machine 1 shown in FIG. 1 except that a CRT is used as the display window 3, and therefore, the description of the appearance is omitted. The monitor that can be used for the display window 3 is CR
The monitor is not limited to T, and may be a liquid crystal monitor, a plasma display, or any other monitor.

FIG. 7 is a block diagram showing a circuit configuration of the slot machine according to the second embodiment. As shown in FIG. 7, this slot machine has a CPU 30, a counter 3
1 and a microcomputer 33 provided with a random number generator 32 and a CRT drive unit 3 for controlling a CRT 34
5, ROM 36 and RAM 37 as storage means, and C
A pulse generator 38 that supplies a clock pulse to the PU 30
And The CRT drive unit 35 includes a graphic RAM 39, a character RAM 40, and a CRT controller 41, and controls the CRT 34 so that a three-digit symbol array is displayed on a screen.

The ROM 36 has two symbol tables 36a, 36a and 3b each storing a list of symbols of three digits.
6b, a winning table 36c storing a list of winning symbol columns, a symbol extracting program 36d as a symbol extracting unit for randomly extracting three digits of symbols,
CR which is a display control unit for displaying the three-digit symbols extracted by the symbol extraction program 36d on the CRT 34
A T control program 36e is stored.

Further, an input port 42 and an output port 43 are connected to the CPU 30, and the game switch section 6 and the coin detecting section 17 are connected to the input port 42. The output port 43 is connected to a hopper 44 for controlling payout of coins and a driving member group 45 such as a lamp relay and a solenoid.

Before the game is started, the number of inserted coins is detected by the coin detecting section 17, and a detection signal is sent to the counter 31 via the input port 42. The counter 31 counts the number of coins based on the detection signal. Next, when the player pulls the start lever 8 or presses the start switch 6b, the pulse generator 38
Supplies a clock pulse to the CPU 30, and the microcomputer 33 starts operating. In accordance with the operation of the microcomputer 33, the CRT controller 41
Operates to access the character data of the symbols stored in the character ROM 40 in the order of addresses. Then, the accessed character data is scroll-displayed on the CRT 34.

Next, under the control of the CPU 30, the symbol extraction program 36d is executed, and one table is selected from the two symbol tables 36a and 36b stored in the ROM 36 in accordance with the number of bets. And
Using the random number value generated by the random number generation unit 32 as a key, a three-digit symbol is extracted from this table. When a three-digit symbol is extracted by the symbol extraction program 36d, CR
The T control program 36e is executed, and a command is sent to the CRT controller 41 to stop the scroll of the CRT 34 at the position of the extracted three-digit symbol. As a result, the CRT 34 stops scrolling,
The three-digit symbol extracted by the symbol extraction program 36d is displayed on the CRT 34.

The symbol tables 36a and 36b and the winning table 36c have the same structure as the symbol tables 14a and 14b and the winning table 14c described above, and the processing of the symbol extracting program 36d is the same as that of the symbol extracting program 14d. Therefore, description of these will be omitted.

The CRT control program 36e further determines whether or not the three-digit symbol extracted by the symbol extraction program 36d is a winning symbol row, by a winning table 36c.
Is determined by referring to FIG. As a result, if it is determined that the three-digit symbol extracted by the symbol extraction program 36d is a winning symbol sequence, the total number of coins displayed on the coin number display unit 4 is determined by the payout number of the winning symbol sequence. Increase. Further, when the player pulls the start lever 8 or presses the start switch 6b, the next game can be started. Also,
The player can receive a refund of coins by pressing the payout switch 6a.

The present invention is not limited to the above embodiment, but can be modified as follows, for example, without departing from the spirit of the present invention.

(1) In the first and second embodiments, the slot machine has been described as an example of the amusement device.
It can be applied to other devices such as a poker game.

(2) In the first and second embodiments, a three-digit symbol is displayed on the display window 3.
The number is not limited to two digits, and may be two digits or four or more digits.
Further, a plurality of columns of symbols are displayed on the display window 3, and based on a combination of symbols arranged on a predetermined payline,
It may be determined whether or not a prize has been won.

(3) In the first and second embodiments, three coins are a max bet, but two or four or more coins may be used. In this case, it is desirable to change the number of symbol tables to an optimum number according to the number of bets.

[0065]

The game machine according to the present invention is constructed as described above, so that the following effects can be obtained.

That is, in each symbol table, the extraction probabilities of at least some of the symbols are changed, and the payout rate for each table becomes substantially equal. For this reason, the advantage and disadvantage of the game hardly occur depending on the number of input points, and the player can enjoy the game with peace of mind.

Further, by changing the extraction probability of at least a part of the symbols registered in each symbol table, the hit rate by the desired symbol combination is changed for each insertion point while the payout rate is kept substantially the same. It is also possible. If such a symbol table is used, a big hit can be easily made when the number of input points is increased, and the player's expectation of the big hit can be sufficiently satisfied.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a game device according to a first embodiment.

FIG. 2 is a perspective view showing an arrangement of each rotating reel.

FIG. 3 is a diagram showing symbols arranged on each rotating reel.

FIG. 4 is a block diagram illustrating a circuit configuration of the game device according to the first embodiment.

FIG. 5 is a diagram showing the structure of a winning table for a buyer pay type game.

FIG. 6 is a diagram showing a structure of a winning table for a multi-coin game.

FIG. 7 is a block diagram showing a circuit configuration of a game device according to a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Amusement device, 3 ... Display window, 9,10,11 ... Rotating reel, 14a, 14b, 36a, 36b ... Symbol table, 14d, 36d ... Symbol extraction program (symbol extraction part), 14e ... Reel control program (Display Control unit), 36e ... CRT control program (display control unit).

Claims (3)

[Claims] 1. An amusement device having a display window for displaying a plurality of symbols arranged side by side, wherein the presence or absence of a prize and the number of acquired points are determined based on a combination of the symbols displayed in the display window, A symbol table in which a list of the symbols is registered, a symbol extraction unit that randomly extracts the symbols from the symbol table, and a display control unit that displays the symbols extracted by the symbol extraction unit on the display window. The symbol table has a plurality of symbols corresponding to the number of input points that are stakes, and each of the symbol tables has an extraction probability of at least a part of the symbols such that a payout rate for each table is substantially the same. An amusement device characterized by changing. 2. The game apparatus according to claim 1, wherein each symbol table changes the extraction probability of at least a part of the symbol by registering a part of the symbol in an overlapping manner. . 3. A plurality of cylindrical rotating reels each having the symbols arranged on an outer peripheral surface thereof are aligned on an inner surface side of the display window with their axes aligned, and the display control unit extracts the symbols by the symbol extracting unit. 3. The game apparatus according to claim 1, wherein the plurality of rotating reels are stopped so that the symbols are arranged so as to face the display window.