Is there a PC chess program that will let me act out hypothetical board setups?


Be careful about Chessmaster 11th edition. It supports a limited number of video cards. That's a potential problem, especially for laptop users. For my laptop, I purchased an older version, Chessmaster 9000. It was under $10, downloadable, does not require a CD, and has many excellent tutorials and analysis feature.
Hi, I'm looking for a PC computer program (preferably simple, small, and free) that will let me set up the pieces however I want and try out hypothetical situations. I'd prefer a program that can save board setups and has a "back" button if I make a wrong move. Thanks!