The first of a series of cassettes all containing strategy games.

The first program, Decoder, is similar to Mastermind, in which you must discover a secret number. The number may have up to nine digits.

After your guess is entered, the computer displays two digits. The first digit indicates how many numbers in your guess are in the secret number. The second digit indicates how many numbers in your guess are also in the correct position.

One or two players may take part in the game. In the two player version, each player has their own secret number to guess.

The second program on the cassette is called Switchboard.

A 3 x 3 grid is drawn on the screen, and each square is numbered one to nine. Some of the squares also have red squares drawn within them.

The object of the game is to have a red square in each of the nine positions.

If, for instance, "1 367" was printed on the screen, key 1 (on the computer keyboard) would reverse squares 3, 6 and 7. So if 3 and 7 had a red square in them, but 6 was empty, then by pressing 1, 3 and 7 would be empty, but 6 would have a red square in it.

J.J.