Whatever chess engine is used - a graphical user interface is required in any case. Although there are also free alternatives in this area - they can not keep up with the enormous scope of the present product. The diverse Schnittstelllen to chess online resources such as "Schach.de" the Live Eröffungsbuch, "Lets check", etc. are free not to have. The software even I could install in its 64 bit version with no problems on my Windows 8.1. The already mentioned Houdini I bought from the producer himself, and integrated in addition to some free engines such as "stockfish", "Critter" and "Gull" in the Fritz software via the creation of a new UCI engine to allow these programs to fight each other. A man, probably the new Norwegian champion is likely to be no chance against such chess engines.
Alternatively you can also purchase Houdini 4 per, which is sold by ChessBase and has the same graphical interface. However, this product will cost 99 Euros. This one is but owned by the world rankings First the World Computer Chess.