Patent ID: 8083583

Claim:
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.