This program can be freely copied and passed on to anyone that wants it! Download it and copy it to your Psion. Load it, press Ctrl+L to compile it then run it.
  Short description:
Flip is a simple puzzle program for the Psion Series 5. Nine tiles, black on one side and white on the other, are placed on a 3 x 3 grid and randomly flipped over. The aim is to flip them back to all black.


  • Written in OPL for the Psion Series 5
  • A simple, fun program
  • It's free!
  • It's very small - only 3k

Long description:
This is a simple program and it was written as an exercise in learning OPL programming on the Psion Series 5. Don't expect anything fancy - it is my first program and so things can only get better! For anyone learning OPL, download the program and take a look at how it's written. It's not perfect (since it's my first program), but I'm sure there's plenty to learn. Both the program and the source code are free - you can do what you want with it.

The tiles are initially all black, but can be shuffled - randomly flipped over - to expose their white underside. Your aim is to simply flip them back to all white. It sounds easy, but tap a tile and more than one flips over - and that makes it tricky. It's a bit like a two dimensional Rubik's Cube.

As you play, you'll discover certain moves that you can perform to flip certain tiles. What is the minimum number of moves required to solve the puzzle from any randomly generated state? You'll have to discover that for yourself.

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