Centauri Systems Development
P. O. Box 2016
Sebastian, FL 32958-2016

Presents...

Behrens' Puzzle

Programmed by Jeremy Thorne, David Siebert, and Timothy Smith.

Concept by  --  Andy Behrens  --  (The man, the legend)

This is more of a programming tool than a real programming accomplishment.
it was designed primarily to serve as an example of how to use the intuition
graphics and message functions.  It also gives the weary programmer something
to do while his or her program compiles (Yawn).

Getting Started

     This game opens in a dragable window.  To end the program simply close the
window.  When you select Set Up the unoccupied cells turn clear and allow you
to add and remove pieces at will.  To play the game select Play, at which point
the rules go into effect.  For an added challenge try playing the game without
reading the rules section below.
     The object of the game is to remove all of the pieces.  One Note: When
you manage to complete the objective the program will not tell you that you
have won.  I assume it will be blatantly obvious.


Rules

When you remove a center piece the four corner pieces reverse.  i. e. If the
place contains a piece it gets removed, and if it is empty a new piece gets
put there.

If you remove a side piece the two corner places reverse.

If you remove a corner piece the two sides next to it and the center reverse.


Suggestions

     You are encouraged to try as many combinations of starting positions as
you can find.  If you find more than 512 let us know and we'll see about
getting you the Nobel Prize for mathematics.

     Show this game to a friend who doesn't know the rules and tell him to
remove the pieces.  You may lose some of your more devoted friends, but the 
look of utter confusion on their faces is well worth it.

     After about 247 games of Behrens' Puzzle you will become a real expert.
It might be fun to offer challenges to other friends who have, by this time,
tortured the rules out of you.  See who can finish certain patterns in the
fewest moves.

     When you are sufficiently suffused with this puzzle you can retire it 
to your voluminous coffee table diskette.  Have Fun.

                                               -- Jeremy Thorne --

P. S.  If you enjoy this puzzle (particularly if you find it helpful for
learning modula) we would be pleased if you would empty the change in your
pockets into an envelope and send it to the address at the top of this doc-
umentation.  This is our first attempt at ShareWare and we would be very
encouraged to write more if we get any response (monetary, that is).  Of 
course, we're not going to be obnoxious and ask for $15.00 or $20.00.  We'll
be happy with anything for now.  (And, quite frankly, I wouldn't pay but a
few dollars for it to begin with)!