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Traffic! Version 1.14
A puzzle game for the Palm Computing(R) Platform
Instructions
============
Traffic! is a freeware implementation of the popular sliding-piece
solitaire game Rush Hour, by Japanese puzzle author Nob Yoshigahara
(distributed by Binary Arts).
The object of the game is to slide the pieces within the square grid
until the clear piece can be moved out the opening on the right side of
the grid (marked by the arrow). Move the pieces by dragging with the
stylus. Horizontal pieces can be moved only left and right, while
vertical pieces can be moved only up and down. Press the reset button in
the lower right to restore the current level to its original piece
configuration.
There are 40 levels available. You can go on to the higher levels only
after solving the lower level puzzles. Levels 30-40 are very difficult
and require a great deal of planning and patience. You can always go
back to play previous levels by tapping the "<" button; return to the
later levels by tapping the ">" button. The program records your move
count at the bottom of the screen. It also keeps track of the lowest
move count with which you've been able to finish a given level, and
for comparison displays the minimum number of moves for that level.
At any point, you can to go back to a level you've completed to try to
beat your low score.
Whenever you quit Traffic!, the current piece configuration, your low
scores, and your progress overall are saved.
Requirements
============
Palm OS 1.0 or higher.
Traffic! occupies less than 10K of memory!
Download / Installation
=======================
Download the zip file for Traffic! version 1.14 at the Traffic! web page
at http://mail.med.upenn.edu/~pcheng/traffic
Unzip the 'Traffic.prc' file and HotSync it to your Palm device using
your favorite install tool (e.g., instapp.exe for WinDOS or pilot-xfer
for Unix). Version 1.14 can be installed directly over previous versions
without losing the low scores.
RΘmi ChΘno has prepared a version of Traffic! with the program messages
translated into French! (Version 1.0) Download the .PRC file at the same
web page above.
Availability
============
Traffic! is freeware. You are welcome to distribute it to friends and
colleagues in unmodified form. E-mail bug reports, comments,
suggestions, etc. to the address listed at the end of this document; be
sure to include "Traffic" in the subject line. Please do not send
requests for source code or for puzzle solutions (yes, all the levels
can be solved!).
Background
==========
Traffic! was implemented in C using GCC 0.5.0, ported by D. Jeff Dionne
and Kresten Krab Thorup to cross-compile for the Motorola 68328
Dragonball processor.
Traffic! was rated 5 planes at PilotZone!
Traffic! was rated 5 stars at ZDNet!
The name "Rush Hour" is a registered trademark of Binary Arts, Inc.,
with whom I am not affiliated, but for whom I have great admiration.
Their games and puzzles are highly recommended.
Gary W. Flake and Eric B. Baum have written a technical report studying
a generalized form of Rush Hour that uses an n x n grid and a variable
location for the exit and target car. They produce the startling result
that the decision problem version of "Generalized Rush Hour" is PSPACE
complete! See Gary Flake's column in Fatbrain.com for a layman's
explanation.
Amy is my fiancee! (see About screen)
Related Links
=============
I am not directly associated with any of the sites below; they are
provided for the reader's interest.
Rush Hour:
* Binary Arts, distributor of Rush Hour and many other puzzle games
[http://www.puzzles.com/grid_game.htm]
* PuzzleWorld description (John Rausch)
[http://www.johnrausch.com/PuzzleWorld/rushhour.htm]
* Nob Yoshigahara, inventor
[http://hoppers.puzzles.com/Background.htm]
Palm versions:
* Andrew Brault (Smalltalk)
[http://www.tiac.net/users/ajb/products/gridlock.zip]
* Individeo
[http://www.individeo.net/RushHour.html]
Java versions:
* Karl Hornell
[http://www.tdb.uu.se/%7Ekarl/java/cars/]
* William Shubert
[http://www.inetarena.com/%7Ewms/rushHour/]
* Roger Webster, Shane Phillips
[http://cs.millersv.edu/%7Eshane/puz3.html]
* Eagle I. Burns
[http://www.eagle-i.com/JAVA/rush.html]
Sliding block puzzles:
* Nick Baxter
[http://www.johnrausch.com/SlidingBlockPuzzles/index.html]
* Hirofumi Fujiwara
[http://www.pro.or.jp/%7Efuji/java/puzzle/slide/index-eng.html]
* Jared Weinberger
[http://www.mindspring.com/%7Ejaredmarkw/SliderPage.htm]
History
=======
v. 1.0 First public release.
v. 1.1 Added minimum move display for each level
v. 1.11 "Fixed" level 13, which was missing a piece. The minimum
number of moves for level 13 is now correct.
v. 1.12 Adjusted minimum score for level 24 (Keith Wolcott).
v. 1.13 Adjusted minimum score for level 18 (Ian Post). The minimum
score is now displayed immediately upon completion of a level.
v. 1.14 Adjusted minimum scores for level 29 (Steve Dyson) and level 38
(Doug Samson).
Legalese
========
Traffic! is Copyright (c) 1999 by Phillip Cheng
Permission to use, copy, and distribute this software and its
documentation for any non-commercial purpose, without fee, and without a
written agreement is hereby granted, provided that the above copyright
notice and this paragraph and the following two paragraphs appear in all
copies. For commercial usage, please contact the author.
IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT,
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST
PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION,
EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
BASIS, AND THE AUTHOR HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,
SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
Author: Phillip Cheng (pcheng@post.harvard.edu)
Last modified: November 10, 1999