A little bit of cs4fn
On the web
What is cs4fn?
Search:
Games and Puzzles: The Swap Puzzle
In this puzzle you must swap the positions of the red and black pieces.
They slide one space forward or backwards if the square is empty.
They can jump a single piece into a space beyond.
To 'solve' the puzzle you must write down the steps to follow to do it in as few moves as possible.