What is the fine-grained topic of the following text: Powerful features like Smart Moves, the Card Finder, intelligent Hints, on-demand AutoMove, full Undo and Redo, in-progress Snapshots, unlimited save and restore, and more, were designed to be unobtrusive but available when needed to provide a more pleasant and enjoyable Solitaire experience. Only return the topic.
Features of a Solitaire game software