Patent attributes
A gaming machine comprises a display device that presents a symbol array comprising a plurality of symbol positions divided into a plurality of position subsets and game-logic circuitry that causes the display device to: present the symbol array in a first initial state by presenting at least one static symbol position in each position subset and randomly allocating a first set of allocated symbol positions, generate game cycle outcomes by populating the symbol positions, in response to a trigger event, expand a first position subset to include an expanded symbol position, and present the symbol array transitioning from a final state associated with a reset condition to a second initial state by removing expanded symbol positions and the allocated positions from the symbol positions in the final state and randomly allocating a second set of allocated symbol positions among the position subsets to include with the static symbol positions.
