Method and system for managing probability of an outcome in a random generation event

• US 8,083,583 B2
• Filed: 08/03/2009
• Issued: 12/27/2011
• Est. Priority Date: 08/04/2008
• Status: Active Grant

• Current Assignee: Scientific Games Corporation
• Original Assignee: Scientific Games International Incorporated (Scientific Games Corporation)
• Inventors: Bennett, Joseph W. III, Holton, Charles, Safaei, Aman
• Primary Examiner(s): Suhol, Dmitry
• Assistant Examiner(s): DUFFY, DAVID W
• Application Number:
  US12/534,482
• Publication Number:
  US 20100029362A1
• Time in Patent Office: 876 Days
• Field of Search: 463 16- 19, 463/21, 463/22
• US Class Current: 463/21
• CPC Class Codes: G07F 17/32 for games, toys, sports, or amusements
• CPC Class Codes: G07F 17/329 Regular and instant lottery, e.g. electronic scratch cards

Abstract

An online lottery game system and methodology involves, for each play of the game, a player choosing a number of player indicia from a field of the indicia. A subset of the indicia is randomly generated, and the player'"'"'s indicia is compared to the subset to determine a winning game play. The number of indicia in the subsets is varied between different game plays such that a blend of the winning probabilities for each subset for all of the game plays produces a desired overall winning probability.

Claims

1. A computer-implemented method of conducting a lottery game by a lottery host computer system, comprising:

configuring the lottery host computer system with instruction files to implement the lottery game as follows;

for each play of the game, a player choosing a set of player indicia from a total field of indicia;

randomly generating a subset of X number of indicia from the total field of indicia;

for each individual game play, determining whether the game play is a winning play by comparing the player'"'"'s indicia to the subset of indicia to verify if a defined combination of the player'"'"'s indicia is contained in the subset of indicia;

establishing a desired overall winning probability for the game plays by varying the number X of indicia in the subsets between different game plays such that a blend of the winning probabilities for each number X for all of the game plays produces the desired overall winning probability; and

assigning a payout to each winning game play as a function of a predefined overall percentage payout for the game and the overall winning probability such that the payout for all expected winning game plays achieves the percentage payout.

2. The method as in claim 1, wherein the number X of indicia in the subsets is less than the number of indicia in the total field of indicia, and the number of player indicia is less than the number X of indicia in the subsets.

3. The method as in claim 1, wherein the step of establishing the desired overall winning probability comprises establishing a first deck containing at least two sets of records, a first set of the records designating a first number X1 of indicia in the subsets, and a second set of the records designating a second number X2 of indicia in the subsets, and wherein the blend of different sets of records having different X numbers achieves the overall desired winning probability for the game.

4. The method as in claim 3, wherein the first deck includes a third set of the records having a third number X3 and a fourth set of the records having the number X4, wherein the blend of the four sets of numbers achieves the overall desired winning probability for the game.

5. The method as in claim 3, wherein the records in the first deck are randomly shuffled and assigned sequentially to each game play.

6. The method as in claim 3, wherein the number of records in the first deck is computed as a function of a defined total number of game plays.

7. The method as in claim 6, wherein the first deck contains at least 200,000 records.

8. The method as in claim 3, wherein the step of assigning a payout to each winning game play as a function of a predefined overall percentage payout comprises establishing a second deck of records, with the number of records in the second deck corresponding to the expected number of winning game plays as a function of the overall winning probability of the game, each of the records in the second deck designating a prize payout such that a totality of the payouts corresponds to the desired percentage payout schedule, and assigning one of the records in the second deck to each of the game plays designated as a winning game play.

9. The method as in claim 8, wherein the records in the second deck are randomly shuffled and assigned sequentially to the winning game plays.

10. The method as in claim 8, wherein the game includes multiple winning game play combinations, and further comprising establishing additional second decks for each combination, and distributing the prize payout over all of the second decks so as to achieve the desired percentage payout schedule for all of the possible winning combinations.

11. A computer-implemented method of conducting a lottery game by a lottery host computer system, comprising:

configuring the lottery host computer system with instruction files to implement the lottery game as follows;

for each play of the game, a player choosing a number of player indicia from a total field of indicia;

randomly generating a subset of X number of indicia from the total field of indicia;

for each individual game play, determining whether the game play is a winning play by comparing the player'"'"'s indicia to the subset of indicia to verify if the player'"'"'s indicia is contained in the subset of indicia;

establishing a desired overall winning probability for the game plays by establishing a first deck containing at least two sets of records, a first set of the records designating a first number X1 of indicia in the subsets, and a second set of the records designating a second number X2 of indicia in the subsets, and wherein the blend of different sets of records having different X numbers is computed to achieve the overall desired winning probability for the game;

assigning a payout to each winning game play as a function of a predefined overall percentage payout for the game and the overall winning probability by establishing a second deck of records, with the number of records in the second deck corresponding to the expected number of winning game plays computed by applying the overall winning probability of the game to the number of records in the first deck, each of the records in the second deck designating a prize payout such that a totality of the payouts corresponds to the desired percentage payout schedule; and

assigning one of the records in the second deck to each of the game plays designated as a winning game play.

12. The method as in claim 11, wherein the records in the first deck are randomly shuffled and assigned sequentially to each game play.

13. The method as in claim 11, wherein the records in the second deck are randomly shuffled and assigned sequentially to the winning game plays.

14. The method as in claim 11, wherein the indicia comprises numbers and the number X of indicia in the subsets is less than the number of indicia in the total field of indicia, and the number of player indicia is less than the number X of indicia in the subsets.

15. A computer-implemented method of conducting a lottery game by a lottery host computer system, comprising:

configuring the lottery host computer system with instruction files to implement the lottery game as follows;

for each play of the game, a player choosing a number of player indicia from a total field of indicia;

randomly generating a subset of X number of indicia from the total field of indicia;

for each individual game play, determining whether the game play is a winning play by comparing the player'"'"'s indicia to the subset of indicia to verify if a defined combination of the player'"'"'s indicia is contained in the subset of indicia; and

establishing a desired overall winning probability for the game plays by varying the number X of indicia in the subsets between different game plays such that a blend of the winning probabilities for each number X for all of the game plays produces the desired overall winning probability.

16. The method as in claim 15, wherein the number X of indicia in the subsets is less than the number of indicia in the total field of indicia, and the number of player indicia is less than the number X of indicia in the subsets.

17. The method as in claim 15, wherein the step of establishing the desired overall winning probability comprises establishing a first deck containing at least two sets of records, a first set of the records designating a first number X1 of indicia in the subsets, and a second set of the records designating a second number X2 of indicia in the subsets, and wherein the blend of different sets of records having different X numbers is computed to achieve the overall desired winning probability for the game.

18. The method as in claim 17, wherein the first deck includes a third set of the records having a third number X3 and a fourth set of the records having the number X4, wherein the blend of the four sets of numbers achieves the overall desired winning probability for the game.

19. The method as in claim 17, wherein the records in the first deck are randomly shuffled and assigned sequentially to each game play.

20. The method as in claim 17, wherein the total number of records in the first deck corresponds to the total number of game plays.

21. The method as in claim 20, wherein the first deck contains at least 200,000 records.