CV8306-BlackBox-P70.TAP
by J.S. Heppell

Dare you delve into the Black Box and decipher its hidden secrets? This is
a challenging game of deduction in the Mastermind mode.

Your Spectrum will create a code which you have to crack. The code takes
the shape of four pegs hidden in an eight by eight grid - the "black box".
You have to attempt to crack the code by sending in "rays" from the edges
of the box. These rays always travel in a straight line - unless they hit a
peg. When this happens you'll get a clue to the wherabouts of the hidden pegs.

The rays behave in a completely logical fashion. When they strike a peg the
ray will either be absorbed, deflected at right angles or reflected back
the way it came. From the actions of the rays you will be able to deduce
the positions of the pegs. But beware, some rays will follow long and
tortuous routes which can be baffling! Because of the limitations of BASIC
the computer will sometimes take several seconds to work out a ray path.

When the game begins you are in normal mode, where you fire rays in from
the outside edges of the box. When you think you know the location of any,
or all, the pegs, type 0 and you will enter cursor mode. Using the controls
listed on the screen you plot the pegs which you think you have found. When
you reckon that yo know the positions of all the pegs type in 9 (in cursor
mode) and the computer will mark your final guess.

For those of you with stiff programming fingers the title pages at the end
of the listing can be left out. You must however, leave in the lines which
read the user-defined graphic characters. Remember that when typing in these
user-defined graphic the characters will simply be letters in graphics mode
- I used A, B, C and D.

