The Chafitz Applied Concepts Boris 2.5 Chess Computer is a cool and very vintage chess board with a built in computer that slides inside the board. Boris 2.5 is the last and strongest of the Boris engine versions. In 1978 Applied Concepts released the first Boris chess computer followed by the Boris Master in 1979 and the Boris Diplomats in 1979 in 1980. Finally in 1980 Chafitz and Applied Concepts made the Boris 2.5. The Boris 2.5 Chess Computer was primarily made for that version of the Boris engine, but it is modular so the Boris 2.5 Chess Computer can also run other chess engine modules designed for use in the same computer including the Morphy engine module available with this listing. The Boris 2.5 Chess Computer can even run reversi and backgammon modules. The Boris 2.5 Chess Computer is quite rare and old since it was made in 1980 and all units are over 40 years old! However, they were made very well and durable since this Boris 2.5 still works like new! Because of the sliding design, the Boris 2.5 Chess Computer is very compact and also the board is magnetic to keep the pieces from falling off when set up. Besides playing a game against Boris 2.5, you can also take back moves, set up a position, make it solve chess problems, switch sides, and play itself among other cool features.