[This game is Part 2 of 3 of The Sorcerer's Puzzles II. See
"Disappearing Act" and "Turnabout" for Parts 1 and 3.]
(From Color Computer Magazine, July 1983.)
The letters A-X and an empty square are displayed in a five-by-five
grid. The object is to put these 24 letters in alphabetical order,
reading left to right in descending rows. Press the four arrow keys
to maneuver letters. A legal move is one that slides a letter in the
direction indicated by the arrow key trapped, filling the empty space
in that direction. At the start, a player can choose from 10 to 1,000
displacement moves, and the starting position is already disordered.
The program recognizes the winning position.