Skill-based wagering machine providing a predetermined return-to-player

1. A gaming machine, comprising:

a credit input mechanism;

a player interface;

a memory storing data that defines a plurality of initial symbol arrangements, wherein each initial symbol arrangement provides a respective, predetermined minimum return-to-player;

a display device; and

a game controller configured to:

randomly select an initial symbol arrangement from the plurality of initial symbol arrangements;

display, with the display device, a plurality of symbols per the initial symbol arrangement selected from the plurality of initial symbol arrangements;

update the plurality of symbols displayed on the display device to an updated symbol arrangement by moving, per input signals from the player interface, a symbol of the plurality of symbols;

remove a winning pattern of symbols from the updated symbol arrangement to form a plurality of vacated display positions;

drop a first symbol of the updated symbol arrangement from a first display position into a first vacated display position;

present, on the display device, an award for the updated symbol arrangement;

adjust a credit balance based on a credit value for a physical item received by the credit input mechanism; and

adjust the credit balance based on the award for the updated symbol arrangement.

2. The gaming machine of claim 1 , wherein the game controller is further configured to move the symbol by swapping the symbol with another symbol of plurality of symbols.

3. The gaming machine of claim 2 , wherein the player interface generates the input signals in response to the symbol being dragged-and-dropped onto the another symbol.

4. The gaming machine of claim 1 , wherein the game controller is further configured to fill the first display position with a replacement symbol specified by an ordered symbol set associated with the initial symbol arrangement selected from the plurality of initial symbol arrangements.

5. The gaming machine of claim 1 , wherein the data stored by the memory further defines, for each initial symbol arrangement, a respective likelihood of being randomly selected.

6. The gaming machine of claim 5 , wherein the respective likelihood of being randomly selected for at least two of the each initial symbol arrangement is equal.

7. The gaming machine of claim 2 , further comprising:

a touch screen; and

wherein the game controller is configured to:

select the symbol and the another symbol in response to a touch screen input corresponding to the symbol; and

select the another symbol in response to another touch screen input corresponding to the another symbol.

8. A method of a gaming machine, the method comprising:

randomly selecting, with a game controller of the gaming machine, an initial symbol arrangement from a plurality of initial symbol arrangements, wherein each initial symbol arrangement has a respective, predetermined minimum return-to-player;

displaying, with a display device of the gaming machine, a plurality of symbols per the initial symbol arrangement selected from the plurality of initial symbol arrangements;

updating the plurality of symbols displayed on the display device to an updated symbol arrangement by moving, per input signals from a player interface, a symbol of the plurality of symbols;

removing a winning pattern of symbols from the updated symbol arrangement to form a plurality of vacated display positions;

dropping a first symbol of the updated symbol arrangement from a first display position into a first vacated display position;

filling the first display position with a replacement symbol specified by an ordered symbol set associated with the initial symbol arrangement selected from the plurality of initial symbol arrangements;

presenting, with the display device, an award for the updated symbol arrangement;

adjusting, with the game controller, a credit balance based on a credit value of a physical item received by a credit input mechanism of the gaming machine; and

adjusting the credit balance based on the award for the updated symbol arrangement.

9. The method of claim 8 , wherein moving the symbol comprises swapping the symbol with another symbol of the plurality of symbols.

10. The method of claim 9 , further comprising selecting the symbol and the another symbol in response to the symbol being dragged-and-dropped onto the another symbol per the input signals from the player interface.

11. The method of claim 9 , further comprising selecting the symbol and the another symbol in response to receiving a touch screen input corresponding to the symbol and another touch screen input corresponding to the another symbol.

12. The method of claim 8 , wherein selecting the initial symbol arrangement selects the initial symbol arrangement based on data that defines, for each initial symbol arrangement, a respective likelihood of being randomly selected.

13. The method of claim 12 , wherein, for at least two initial symbol arrangements of the plurality of initial symbol arrangements, the respective likelihood of being randomly selected is equal.

14. A non-transitory, computer readable storage medium comprising instructions, that in response to being executed, cause a gaming machine to:

randomly select an initial symbol arrangement from a plurality of initial symbol arrangements, wherein each initial symbol arrangement has a respective, predetermined minimum return-to-player;

display a plurality of symbols per the initial symbol arrangement selected from the plurality of initial symbol arrangements;

update the plurality of symbols to an updated symbol arrangement by moving, per received input, a symbol of the plurality of symbols;

remove a winning pattern of symbols from the updated symbol arrangement to form a plurality of vacated display positions;

drop a first symbol of the updated symbol arrangement from a first display position into a first vacated display position;

fill the first display position with a replacement symbol specified by an ordered symbol set associated with the initial symbol arrangement selected from the plurality of initial symbol arrangements;

present an award for the updated symbol arrangement;

adjust a credit balance based on a credit value for a physical item received by a credit input mechanism of the gaming machine; and

adjust the credit balance based on the award for the updated symbol arrangement.

15. The non-transitory, computer readable storage medium of claim 14 , wherein the instructions further cause the gaming machine to move the symbol by swapping the symbol with another symbol of the plurality of symbols.

16. The non-transitory, computer readable storage medium of claim 15 , wherein the instructions further cause the gaming machine to select the symbol and the another symbol in response to the symbol being dragged-and-dropped onto the another symbol.

17. The non-transitory, computer readable storage medium of claim 15 , wherein the instructions further cause the gaming machine to select the symbol and the another symbol in response to receiving a touch screen input corresponding to the symbol and another touch screen input corresponding to the another symbol.

18. The non-transitory, computer readable storage medium of claim 14 , wherein the instructions further cause the gaming machine to select the initial symbol arrangement from the plurality of initial symbol arrangements based on weights assigned to each initial symbol arrangement of the plurality of initial symbol arrangements.

19. The non-transitory, computer readable storage medium of claim 14 , further comprising:

data that defines, for each initial symbol arrangement, a respective likelihood of being randomly selected; and

wherein the instructions further cause the gaming machine to select the initial symbol arrangement based on the data that defines, for each initial symbol arrangement, the respective likelihood of being randomly selected.

20. The non-transitory, computer readable storage medium of claim 19 , wherein the data specifies a same respective likelihood of being randomly selected for at least two initial symbol arrangements of the plurality of initial symbol arrangements.