A set of trump cards

Abstract

A playing card set includes N playing cards, where N>1, and each playing card has a detectable card ID string. This card ID string is a sequence of M characters. The playing card set is given a set ID string, which consists of N R character groups, where R≦M. Each card ID string contributes one R character group from its card ID string in the sequence of M characters to the set ID string. The order of the N R character groups in the set ID string is the same as the order of the N cards in the playing card set.

Description

Technical Field

[0001]

[01] The present invention generally relates to a plurality of playing cards and a plurality of playing card sets, which are, for example, randomized playing cards, and typically a plurality of casino playing card sets. The present invention particularly takes into account such a plurality of playing card sets and reduces the risks related to fraud and / or game result prediction.

Background Art

[0002]

[02] Card-playing games are very popular in casinos and similar establishments. In such card games, since the profit that can be obtained relative to the bet is large, fraud and cheating are very likely to occur.

[0003]

[03] The first cause of fraud and cheating is the agreement between the dealer and the player, for example, sending a signal related to the next card to be dealt. For this reason, it is made quite difficult for the dealer to see the next card when dealing it. Sophisticated shoe and card dealing systems have been created to prevent information about the next card(s) from being transmitted to the dealer and the player.

[0004]

[04] Another cause of fraud and cheating is the leakage of information about a series of cards in the card set used in the game, and that information is obtained in the manufacturing process and also while the cards and sets are being manufactured and transported from the locked location in the casino to the table where the card sets are dealt. To reduce the leakage of information, the transportation and manufacturing chain is made as short as possible with respect to both time and distance.

[0005]

[05] Another cause of fraud and skulduggery is information on the card ID (rank and suit) associated with small visible defects on the card itself. Such small defects can be a slight color deviation, a deviation in the printed pattern on the card, a slight deviation in the regular shape due to an incomplete cut of the card, etc. A high level of quality control is used to reduce or eliminate any kind of defect in the cards.

[0006]

[06] Finally, the cause of fraud and skulduggery can be the use of fake cards inserted into the card set during the game itself or during the manufacture of the card set and its transportation to the table where the card set is distributed.

Summary of the Invention

[0007]

[07] According to a first configuration, a deck of playing cards is provided. The deck of playing cards includes N playing cards, where N > 1, and each playing card has a detectable card ID string. This card ID string is a sequence of M characters. The deck of playing cards is provided with a set ID string, which consists of N groups of R characters, where R ≤ M. Each card ID string provides one group of R characters taken from its M-character sequence of the card ID string to the set ID string. The order of the N groups of R characters in the set ID string is the same as the order of the N cards in the deck of playing cards.

[0008]

[08] Thus, the card ID string can be obtained by concatenating the R characters taken from each of the N card ID strings, taken in the order in which the cards appear in the card set.

[0009]

[09] Therefore, the first group of R characters of N in the set ID string is the R characters taken from the first trump card of the trump card set, the second group of R characters of N in the set ID string is the R characters taken from the second trump card of the trump card set, and so on.

[0010]

[10] Therefore, the set ID string holds information about the order of the cards present in the set. This information string can be used as a control tool when the trump card set is used, for example, when it is dealt. When drawing a card from the trump card set, reading or acquiring the card ID string, and identifying the R characters of that card ID string, those R characters can be compared with the R characters of the set ID string. If the R characters of the card ID string and the R characters of the set ID string match at the appropriate positions in the string, the position of the card in the set is correct. In case of a mismatch, something may have occurred regarding the position of that card in the card set, which could indicate fraud or skulduggery.

[0011]

[11] The cards of the trump card set are preferably randomized, which means that the N cards present in the set can be shuffled and are in an order that is not systematic with respect to the rank and / or suit of the cards.

[0012]

[12] According to some embodiments, the card ID string can be printed on the face side of the trump card.

[0013]

[13] According to some embodiments, the card ID string can be encrypted into a card ID code.

[0014]

[14] This encryption can use a given encryption key, thus enabling the card ID code to be decrypted back to the card ID string.

[0015]

[15] Instead of the card ID string, this card ID code can be printed on the playing card.

[0016]

[16] According to some embodiments, the card ID code can be printed on the face side of the playing card.

[0017]

[17] This first encryption ensures that when the card ID string holds information regarding the rank and suit of the card or any other relevant information, upon reading the card ID code, this information regarding the rank and suit or any other relevant information is not readily available. To reveal this rank and suit or any other relevant information, the encryption / decryption key of this first encryption is required.

[0018]

[18] The set ID string and / or set ID code can be maintained with the playing card set, as further described. By way of example, the set ID code, which can be a series of characters, can be printed on the package of the playing card set or on the seal that seals the package.

[0019]

[19] The card ID string and / or card ID code can be printed more than once, for example, 2, 3, or 4 times, on the face of the card so that the string or code can be more easily recognized and read.

[0020]

[20] N, M, and R are positive integers.

[0021]

[21] N is a positive integer greater than 1. N can be, for example, 52 or more, for example, 54 or more, for example, a multiple of 52, etc. More preferably, the set includes one or more decks of playing cards, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 decks. Each deck includes 4 suits of 13 cards: clubs, diamonds, spades, and hearts. Each of the 13 cards has a different rank, and they are ace, king, queen, jack, and 9 through 2. Optionally, there can be other playing cards in the playing card set, and the other playing cards have functions in games conducted using this playing card set.

[0022]

[22] M is preferably between 1 and 40, for example, greater than 1, greater than 2, greater than 3, further greater than 4, and also less than 40, for example, less than 35, less than 30, further less than 25, etc. Preferably, M is between 2 and 20.

[0023]

[23] R is preferably between 1 and 40, for example, greater than 1, greater than 2, greater than 3, further greater than 4, and also less than 40, for example, less than 35, less than 30, further less than 25, etc. Preferably, R is between 1 and 20, for example, between 1 and 10, for example, between 1 and 8, for example, 1, 2, 3, 4, 5, 6, 7, or 8.

[0024]

[24] According to some embodiments, R can have a value between 1 and 5.

[0025]

[25] The characters are understood to be characters selected from letters of the alphabet, numbers 0 to 9, punctuation marks and special characters such as &, @, #, §, $, £,

Number

[0026]

[26] Suitably, the characters are characters selected from the alphabet and the numbers 0-9. Optionally, the characters are characters selected from the numbers 0-9 and A-F, thereby providing hexadecimal codes and strings. Optionally, the characters are characters selected from the numbers 0-9, thereby providing decimal codes and strings. More preferably, the card ID string and the set ID string are composed of the characters 0 and 1, thereby providing binary codes and strings.

[0027]

[27] The card ID string can be printed on the playing card. The card ID string, or, as will be further explained, the card ID code, is detectable, which means that it can be read from one face of the card using appropriate lighting and reading means. This can be detected and read by a vision system, such as a camera, under ambient lighting, and can also be seen with the naked eye. Also, this can be provided using an invisible ink that is only visible and thus detectable under special lighting, such as under UV light.

[0028]

[28] According to some embodiments, the set ID string can be encrypted into a set ID code.

[0029]

[29] Encryption can use a given encryption key, thus making it possible to decrypt the set ID code back to the set ID string.

[0030]

[30] Instead of the set ID string, this set ID code can be used as information associated with the playing card set.

[0031]

[31] The use of strings encrypted into codes can reduce the risk of fraud. The R-character IDs of both the card ID string and the set ID string cannot be easily obtained and read, and usually require complex operations on the codes using encryption / decryption keys that are kept secret.

[0032]

[32] According to some embodiments, the deck of playing cards can be packed into a sealed package, and the set ID code is printed on the package and / or the seal.

[0033]

[33] According to some embodiments, the card ID string can include information about the rank and suit of the playing card.

[0034]

[34] A given number A1 of characters in the card ID string can be linked one-to-one with the rank and suit of the card, where A1 < M. By way of example, A1 is 6 or more, and each card of various ranks and suits is linked one-to-one to a binary sequence consisting of 6 or more characters of 0 or 1. Preferably, there is no logic between cards of consecutive ranks and the same suit, and the content of the A1 characters contributes to each of those cards.

[0035]

[35] According to some embodiments, the deck of playing cards can include B decks of playing cards, where B > 1, and the card ID string includes information about the deck to which the card in the card set belongs.

[0036]

[36] A given number A2 of characters can be linked one-to-one to one of the B decks in the set, where A2 < M. By way of example, B is 8, A2 is 1 character, and A2 is a number between 1 and 8, i.e., the number of the deck to which the card belongs. If the card belongs to the first deck, A2 is 1; if the card belongs to the second deck, A2 is 2; and so on.

[0037]

[37] Alternatively, A2 is a three-character string of 0 or 1. If the card belongs to the first deck, A2 is 000; if the card belongs to the second deck, A2 is 001, and so on. If the card belongs to the eighth deck, A2 is 111.

[0038]

[38] It is understood that if the card ID string also includes information about the rank and suit of the playing card by the A1 characters, then both A1 and A2 need to be less than or equal to M.

[0039]

[39] According to some embodiments, the card ID string · the date and / or time of printing of the card, and / or · the location where the card was printed, and / or · the company that printed the card, and / or · the type of game played with the printed card, and / or · the brand of the card, and / or · the casino for which the printed card is intended can include information about.

[0040]

[40] According to some embodiments, the card ID string can include a serial number and / or a random number.

[0041]

[41] This serial or random number can preferably include from 1 to 40 characters, such as, for example, from 1 to 20 characters. By way of example, this serial or random number can preferably include numbers greater than 1, greater than 2, greater than 3, and further greater than 4, and also less than 40, for example, less than 35, less than 30, and further less than 25, etc. Preferably, this serial or random number is between 1 and 20, for example, between 1 and 10, for example, between 1 and 8, for example, 1, 2, 3, 4, 5, 6, 7, or 8.

[0042]

[42] Regarding the R-character group extracted from the M-character card ID string, the positions of the R characters in the M-character string are preferably always the same. Therefore, the R characters and the integers p1 to p representing the positions in the M-character string R Regarding p1 to p R are integers between 1 and M. Preferably, but not necessarily, p1 to p R are sequential numbers, and thus, for an integer q varying between 2 and R, p q = p q-1 + 1.

[0043]

[43] According to some embodiments, the R-character group extracted from the card ID string of the M-character column can be a group of R sequential characters obtained from this card ID string of the M-character column, and the first of the R sequential characters is always the character at the same position in the card ID string of the M-character column.

[0044]

[44] According to some embodiments, the card ID string, or the card ID code if applicable, is printed using UV-visible ink.

[0045]

[45] Preferably, ink is used, which is UV-visible but not visible to the naked eye under ambient lighting.

[0046]

[46] The card ID string or code can be made invisible to the naked eye. The card ID string or code can be made visible by UV illumination only or by radiation with non-visible light of a given wavelength or wavelength range, and thus can be made detectable. An appropriate camera system can be used with a UV illumination source such as UV illumination of an LED to make the card ID string or code readable.

[0047]

[47] The card ID string, and / or where applicable the card ID code, is represented on the card using a barcode, QR code (registered trademark), snap tag, binary code, and / or character set.

[0048]

[48] According to some embodiments, the card ID string or code can be printed using microdot encryption. The use of microdots on the face side of the card to identify the rank and suit of the card is known from US9254435.

[0049]

[49] The playing card set according to the first configuration of the present invention has several advantages. When the cards are used in a card game where it is required that the order of the cards be random and unpredictable, it is quite counterintuitive to identify each card. Marked cards have always been out of the question. Nevertheless, identification can make it possible to set up a control system to reduce the risk of fraud and cheating, for example, by the exchange of fraudulent cards. This is even stronger when the card ID is invisible to the naked eye.

[0050]

[50] A playing card having a card ID string or code is part of a playing card set. When a playing card set is made, the order of the playing cards that are members of the set is known to the manufacturer. When the card ID string or code in the playing card set is inspected, any fake cards that are part of the playing card set are detected at any point in time. During play, including in a game, since the card ID string is read or the card ID code is read and decrypted into a string and the R characters of the read or converted string are compared to the set ID string, it is impossible to distribute cards that are not originally part of the card set.

[0051]

[51] Thus, the instant reading of the card ID string when distributed, or the conversion that returns the code to a string, can be used as control. If the dealt playing card is not the next card in sequence, it may indicate that an unauthorized handling of the playing card set is taking place, or that a fraudulent card exchange is taking place. Thus, this also indicates fraud or a rigging attempt.

[0052]

[52] In practice, the dealer shoe can read the card ID string or code and send the read data to the central processing unit. The latter can decrypt the code so as to return it to a card ID string. The R characters of the card ID string can be selected and compared with the relevant characters in the set ID string to which this card should be linked, or optionally, obtained by decrypting the set ID code. If this does not match, this indicates a fraudulent act or a defective card operation.

[0053]

[53] According to a second configuration of the present invention, a method of dealing a playing card from a playing card set is provided, the method comprising: · providing a playing card set according to any of the above claims; · providing a dealing shoe suitable for reading a card ID string or, where applicable, a card ID code; · reading a card ID string or, where applicable, a card ID code; · extracting the R characters of the card ID string and comparing them with the characters in the set ID string and including.

[0054]

[54] According to some embodiments, the method of dealing a playing card from a playing card set is: A. providing a playing card set according to any of the above claims; B. Provide a dealing shoe suitable for reading a card ID string or, where applicable, a card ID code. C. A processing device, · If applicable, decrypt the card ID code into a card ID string. · If applicable, decrypt the set ID code into a set ID string. · Extract R characters from the card ID string. · Compare the R characters from the card ID string with the set ID string. and provide a processing device for doing so. D. Insert the said deck of playing cards into the said dealing shoe. E. Provide a set ID string or, where applicable, a card ID code to the processing device. F. Deal playing cards from the dealing shoe. G. Read, by the dealing shoe, a card ID string or, where applicable, a card ID code, and provide the card ID string or, where applicable, the card ID code to the processing device. H. If applicable, decrypt the card ID code into a card ID string. I. Extract the R characters of the card ID string and compare them with the characters in the set ID string. J. Repeat steps F to I until it is recognized in step I that the R characters of the card ID string are equal to the characters in the set ID string. K. When it is recognized in step I that the R characters of the card ID string are not equal to the characters in the set ID string, signal the said defect. It can include the above.

[0055]

[55] N is a positive integer greater than 1.

[0056]

[56] The signal can be a visual signal or an auditory signal such as an alarm. The processing device can be part of the dealing shoe itself or a remote processing device, for example, a processing device that is part of a device for controlling a game being played.

[0057]

[57] As long as there is no technical incompatibility, the features of one configuration of the present invention can be combined with the features of another configuration of the present invention.

[0058]

[58] When ranges are recited, all ranges are inclusive unless otherwise specifically indicated.

[0059]

[59] The independent claims and the dependent claims state certain features and preferred features of the present invention. The features of the dependent claims can be combined with the features of the independent claims and other dependent claims and / or can be appropriately combined with the features described above and / or herein.

[0060]

[60] The above and other characteristics, features, and advantages of the present invention will become apparent from the following detailed description in connection with the accompanying drawings that illustrate, by way of example, the principles of the present invention. This description is provided for the purpose of illustration only and without limitation of the scope of the present invention. The reference drawings shown below refer to the accompanying drawings.

Brief Description of the Drawings

[0061]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

DETAILED DESCRIPTION OF THE INVENTION

[0062]

[66] In various drawings, the same reference numerals refer to the same or similar or analogous elements.

[0063]

[67] The present invention will be described in connection with specific embodiments. It should be noted that the term "comprising" used in the claims should not be construed as limiting to the recited means and does not exclude other elements or steps. Thus, as mentioned, it is to be construed as identifying the presence of the described features or steps or components and not excluding the presence or addition of one or more other features or steps or configurations or combinations thereof. Thus, the scope defined by the description "a device comprising means A and means B" should not be limited to a device consisting only of component A and component B. This means, with respect to this invention, that the components related to the device are A and B.

[0064]

[68] In this specification, references are made to "one embodiment" or "embodiments". Such references indicate that the particular features described in connection with the embodiments are included in at least one embodiment of the present invention. Accordingly, the appearances of "in one embodiment" and "in an embodiment" in various places in this specification may refer to the same embodiment, but do not necessarily refer to the same embodiment.

[0065]

[69] Further, although it will be apparent to those skilled in the art, the specific features and characteristics can be combined in any suitable manner in one or more embodiments.

[0066]

[70] A playing card that is part of a deck of playing cards according to the present invention is shown in FIG. 1. The deck of playing cards includes, by way of example, eight decks of 52 cards. Accordingly, N is 416. In the case of the ace of hearts, playing card 10 has a card ID string 13. This card ID string 13 is printed using UV visible ink and cannot be seen with the naked eye under ambient lighting.

[0067]

[71] As shown in FIG. 2, the card ID string 13, which is a binary string of the characters 0 and 1, is composed of several character groups 31, 32, and 33. The first group is a character string that is linked one-to-one with the rank and suit of the playing card. Accordingly, in the example shown in FIGS. 1 and 2, the ace of hearts is linked with the string "10001011". All aces of diamonds in the deck of playing cards have this string as the first eight digits of the card ID string. These first groups can be obtained by assigning card numbers from 1 to 52 to each card and converting the card number into the above string by encrypting the card number using a given encryption value.

[0068]

[72] The second group consists of 3 consecutive characters of 1 or 0. Group 32 is 000 if the card belongs to the first deck where the card is present in the trump card set, and Group 32 is 001 if the card belongs to the second deck, and so on. This means that for the specific cards shown in FIGS. 1 and 2, the card belongs to the fourth deck present in the trump card set.

[0069]

[73] It is understood that this second group 32 of characters can have more than 3 characters, such as 4 characters, 5 characters or more. In an alternative embodiment, this group can be, for example, a group of a given number of randomly generated characters.

[0070]

[74] The third group 33 is a control digit. By way of example, this is represented as 0 if the digit string given by Group 31 and Group 32 contains an even number of "1"s, and is represented as 1 if the digit string given by Group 31 and Group 32 contains an odd number of "1"s.

[0071]

[75] FIG. 3 shows the 5 card ID strings of 5 consecutive cards 51 to 55 of the trump card set. In this trump card set, card 51 is the same as card 10 in FIG. 1. Card 53 is the ace of hearts, but is from the fourth deck of the cards in the set. Card 54 is a card different from the ace of hearts and is also a card from the fifth deck.

[0072]

[76] The set ID code 60 is a series of characters, each character being from a group including the alphabet and the digits 0 through 9, and with an appropriate decryption key or algorithm 70, the set ID code can be converted into a set ID string 61. From each card ID string, the 3rd, 7th, and 11th characters are selected as a group 80 of R characters which are 3 characters in this embodiment. The first 3 characters 62 of the set ID string are the 3rd, 7th, and 11th characters of the card ID string 51, i.e., the first card of the card set. The next 3 characters 63 of the set ID string are the 3rd, 7th, and 11th characters of the card ID string 52, i.e., the second card of the card set, and so on. Thus, all of the groups of R characters are concatenated one after another in the same order as the order in which the individual cards exist in the card set.

[0073]

[77] Thus, the packed card set 90 of FIG. 4 having a seal 91 indicating the set ID code 60 can be used to play a card game, for example, baccarat, and during that game, the order of the cards in the set can be monitored as to whether that order is equal to the original order when the set was made and the set ID string and code were generated.

[0074]

[78] An alternative playing card which is part of a playing card set according to the present invention is shown in FIG. 5. The playing card set includes, by way of example, 8 decks of 52 cards. Here again N is 416. In this case, the playing card 100 which is the ace of diamonds has a card ID code which is an 8-character string from the alphabet, the digits 0 through 9, the special characters &, #, §, $, £, and

Number

[0075]

[79] As shown in FIG. 6, the card ID string 104, which is a binary string of characters 0 and 1, can be obtained by an appropriate decryption algorithm 202. This card ID string 104 can be composed of several character groups 301, 302, and 303. The first group 301 is a character string that is linked one-to-one with the rank and suit of the playing card. Thus, in the examples shown in FIGS. 5 and 6, the ace of diamonds is linked with the string "10110010". All aces of diamonds in the playing card set have this string as the first 8 digits of the card ID string.

[0076]

[80] The second group 302 is three consecutive characters of 1 or 0. The group 302 is 000 if the card belongs to the first deck that exists in the playing card set. The group 302 is 001 if the card belongs to the second deck, and so on. This means that for the specific card shown in FIGS. 5 and 6, the card belongs to the seventh deck that exists in the playing card set.

[0077]

[81] Here too, it is understood that this second group 302 of characters can have more than three characters, such as, for example, four characters, five characters, or more. In an alternative embodiment, this group can be, for example, a group of a given number of randomly generated characters.

[0078]

[82] The third group 303 is a control digit. As an example, this is represented as 0 if the digit string given by group 301 and group 302 contains an even number of "1"s, and is represented as 1 if the digit string given by group 301 and group 302 contains an odd number of "1"s.

[0079]

[83] FIG. 7 shows five card ID strings for five consecutive cards 501 to 505 of a playing card set. In this playing card set, card 501 is the same as card 100 in FIG. 8. Card 503 is the ace of diamonds and is from the first deck of cards in the set.

[0080]

[84] The set ID code 600 is a series of eight characters, each character being from a group that includes the alphabet, the digits 0 through 9, and the special characters &, #, §, $, £, and

Number

[0081]

[85] Thus, a packed card set having a seal showing the set ID code 600 can be used for playing a card game, e.g., baccarat, and during the game, the order of the cards in the set can be monitored as to whether the order is the same as the original order when the set was created and the set ID string and code were generated.

[0082]

[86] An alternative playing card, which is part of a playing card set according to the present invention, is shown in FIG. 8. The playing card set includes, by way of example, eight decks of 52 cards, so there are 416 cards. N is 416. The playing card 1000, which is the ace of spades in this case, has a card ID code 1002, which is a microdot image code, four times here. Instead of the microdot code, the code can be a QR code, and it is understood that it can be placed in the same location as the microdot code, or, for example, adjacent below or to the right of the rank ID of the card.

[0083]

[87] As shown in FIG. 9, a card ID string 1004, which is a binary string of characters 0 and 1, can be obtained by an appropriate decryption algorithm 2002. This card ID string 1004 can be composed of several character groups 3001 and 3002. The first group 3001 is a character string that is linked one-to-one with the rank and suit of the playing card. Thus, in the example shown in FIGS. 8 and 9, the ace of spades is linked with the string "111111". All the aces of spades in the playing card set have this string as the first six digits of the card ID string.

[0084]

[88] The second group 3002 is three consecutive characters of 1 or 0. The group 3002 is 000 if the card belongs to the first deck in which the playing card set exists, the group 3002 is 001 if the card belongs to the second deck, and so on. This means, with respect to the specific card shown in FIGS. 8 and 9, that the card 1000 belongs to the eighth deck in which the playing card set exists.

[0085]

[89] Here too, it is understood that the second group 3002 of this character may have more than three characters, for example, four, five or more characters. In an alternative embodiment, this group can be, for example, a group of a given number of randomly generated characters.

[0086]

[90] FIG. 10 shows five card ID strings of five consecutive cards 5001 to 5005 of a deck of playing cards. In this deck of playing cards, card 5001 is the same as card 1000 in FIG. 8. Card 5003 is the ace of spades, but is from the second deck of cards in the set.

[0087]

[91] The set ID code 6000 is a barcode. By means of an appropriate decryption key or algorithm 7000, the set ID code 6000 can be converted into a set ID string 6001. From each card ID string, a three-character group 3002 is selected as a group 8000 of R characters, which is three characters in this embodiment. The first three characters 6002 of the set ID string are the group 3002 of card ID string 5001, that is, the first card of the card set. The next three characters 6003 of the set ID string are the group 3002 of card ID string 5002, that is, the second card of the card set, and so on.

[0088]

[92] Thus, as shown in FIG. 11, a packed card set 9000 having a seal 9001 showing the set ID code 6000 can be used for playing a card game, for example, baccarat, and during that game, the order of the cards in the set can be monitored as to whether that order is the same as the original order when the set was made and the set ID string and code were generated.

[0089]

[93] To demonstrate embodiments in accordance with the present invention, preferred embodiments and / or materials have been described, but it is understood that various modifications and changes can be made without departing from the scope and spirit of the present invention.

Claims

**Claim 1** A deck of playing cards, said deck comprising N (N>1) playing cards, each playing card having a detectable card ID string, said card ID string being a sequence of M characters, said deck of playing cards having a set ID string provided, said set ID string consisting of N groups of R characters (R≤M), each card ID string providing to said set ID string one group of R characters taken from said card ID string of said sequence of M characters, and the order of said N groups of R characters in said set ID string being the same as the order of said N playing cards in said deck of playing cards. **Claim 2** The deck of playing cards according to claim 1, wherein R<M. **Claim 3** A deck of playing cards according to claim 1 or 2, wherein said card ID string is printed on the face side of said playing card. **Claim 4** A deck of playing cards according to any one of claims 1 to 3, wherein said card ID string is encrypted into a card ID code. **Claim 5** A deck of playing cards according to claim 4, wherein said card ID code is printed on the face side of said playing card. **Claim 6** A deck of playing cards according to any one of claims 1 to 5, wherein R has a value between 1 and 5. **Claim 7** A deck of playing cards according to any one of claims 1 to 6, wherein said set ID string is encrypted into a set ID code. **Claim 8** A deck of playing cards according to claim 7, wherein said deck of playing cards is packed in a sealed package, and said set ID code is printed on said package and / or seal. **Claim 9** A deck of playing cards according to any one of claims 1 to 8, wherein said card ID string contains information about the rank and suit of said playing card. **Claim 10** A trump card set according to any one of claims 1 to 9, wherein the trump card set includes B decks (B>1) of trump cards, and the card ID string includes information about the deck to which the trump card belongs in the trump card set.

11. A trump card set according to any one of claims 1 to 10, wherein the card ID string - the date and / or time of printing of the trump card, and / or - the place where the trump card was printed, and / or - the company that printed the trump card, and / or - the type of game played with the printed trump card, and / or - the brand of the trump card, and / or - the casino for which the printed trump card is intended including information about.

12. A trump card set according to any one of claims 1 to 11, wherein the card ID string includes a serial number and / or a random number.

13. A trump card set according to any one of claims 1 to 12, wherein the group of R characters taken from the card ID string of the M-character column is a group of R ordered characters obtained from the card ID string of the M-character column, and the first of the R ordered characters is always the character at the same position in the card ID string of the M-character column.

14. A trump card set according to any one of claims 1 to 13, wherein the card ID string is printed using UV visible ink.

15. A trump card set according to claim 14, wherein the card ID string is encrypted into a card ID code, and the card ID code is printed using UV visible ink.

16. A method of dealing trump cards from a trump card set, comprising: - providing a trump card set according to any one of claims 1 to 14; and - providing a dealing shoe suitable for reading the card ID string. - Reading the card ID string, - Extracting the R characters of the card ID string and comparing them with the characters in the set ID string, A method comprising the above steps. **Claim 17**: A method of dealing playing cards from a playing card set, comprising: - Providing the playing card set according to claim 15, - Providing a dealing shoe suitable for reading the card ID code, - Reading the card ID code, - Decrypting the card ID code into the card ID string, - Extracting the R characters of the card ID string and comparing them with the characters in the set ID string, A method comprising the above steps. **Claim 18**: A method of dealing playing cards from a deck of playing cards, comprising: A. Providing the deck of playing cards according to any one of claims 1 to 14, B. Providing a dealing shoe suitable for reading the card ID string, C. Providing a processing device for: - Extracting the R characters from the card ID string, - Comparing the R characters from the card ID string with the set ID string, D. Inserting the deck of playing cards into the dealing shoe, E. Providing the set ID string to the processing device, F. Dealing playing cards from the dealing shoe, G. Reading the card ID string by the dealing shoe and providing the card ID string or the set ID code to the processing device, H. Extracting the R characters of the card ID string and comparing them with the characters in the set ID string, I. Repeating steps F to H until the R characters of the card ID string and the characters in the set ID string are considered equal in step H, J. Signaling a fraudulent act or a defective card operation when the R characters of the card ID string and the characters in the set ID string are not equal in step H. A method comprising the above steps. **Claim 19**: A method of dealing playing cards from a deck of playing cards, comprising: A. Providing the deck of playing cards according to claim 15, ​ B. Providing a dealing shoe suitable for reading the card ID code; C. Providing a processing device, - decrypting the card ID code into a card ID string, - decrypting the set ID code into a set ID string, - extracting the R characters from the card ID string, - comparing the R characters from the card ID string with the set ID string for providing a processing device; D. Inserting the playing card set into the dealing shoe; E. Providing the set ID string or the set ID code to the processing device; F. Dealing playing cards from the dealing shoe; G. Reading the card ID code by the dealing shoe and providing the card ID code to the processing device; H. Decrypting the card ID code into the card ID string; I. Extracting the R characters of the card ID string and comparing them with the characters in the set ID string; J. Repeating steps F to I until the R characters of the card ID string and the characters in the set ID string are considered equal in step I; K. Signaling a fraudulent act or a defective card operation when the R characters of the card ID string and the characters in the set ID string are considered unequal in step I; A method comprising.

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