Produced in 1992, the Saitek Calculator Chess also has a small hidden chess board compartment. This board however is very small and not so convenient to use. Calculator Chess Chess can also be used as a regular calculator.
The playing levels are awkward and it takes a very long time to respond once you get into the D1 to H8 playing levels. This is very similar to Saitek Companion, Saitek Travel Companion and also RadioShack Companion. We can assume from this that the software inside these machines are all identical.