Patent ID: 7604538

Claim:
A method of conducting a wagering game on a gaming machine, comprising: receiving a wager from a player to initiate play of the wagering game; receiving a selection of at least one of a plurality of pre-defined player-selectable pay lines; randomly selecting a plurality of symbols to form a first array; displaying the first array; identifying winning symbols in the first array that form any first winning combination along one or more pay lines of the plurality of pre-defined player-selectable pay lines; awarding the player for the first winning combination in the first array if the first away contains the first winning combination along one or more pay lines of the plurality of pre-defined player-selectable pay lines; replacing one or more of the winning symbols in the first away that form the first winning combination with a randomly determined replacement symbol to form a second array; displaying the second array; identifying winning symbols in the second array that form any second winning combination along one or more pay lines of the plurality of pre-defined player-selectable pay lines; and awarding the player for the second winning combination in the second array.