Test for any invalid entries. This does not check for incorrect entries. Invalid cells are hilighted in pink.
Check All -
This is a cheat button. It performs the 'Validate' above and then tests for incorrect entries. Any cell with the wrong number is hilighted in red.
Resets the puzzle back to the original starting point.
This allows you to bookmark the current puzzle state. You can have as many bookmarks as needed.
Restores the puzzle back to the latest bookmark.
Restores the puzzle back to the latest bookmark and removes that bookmark from the stack.
Clears all of the bookmarked save points.
Displays/Hides this help.
Selects new puzzle and level.