Primary   Medium   Expert   Full screen   Custom
Automatic Flag

First click is safe.
"50% guess" is safe at the end, when all other cells having been opened or marked.
The mine's density in Full-screen mode is equal to the Expert's, when the map is larger.

Mouse(on Computer): Right button to mark a mine, click again to remove the flag. After mark out all the mines around a digit, click(whether left or right button) the digit to clear the surrounding non-mine area. Click left button to open an unknown cell directly.

Touch(on Mobile or Pad):Touch an unknown cell to mark flag, touch again to remove it. When mark out all the mines around a digit, touch the digit to open all the surrounding unknown cells. Long touch to open a cell directly.




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