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∑ Chess 5.0 ƒ
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2000-08-06
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∑ Chess 5.0 Release Notes
August 20, 2000
_____________________________________________________________________
CONTENTS
1. ∑ CHESS 5 LITE & PRO
2. HOW TO REGISTER & UPGRADE TO ∑ CHESS 5 PRO
3. SYSTEM REQUIREMENTS
4. LIMITED/DISABLED FEATURES IN THE LITE VERSION
5. LICENSE AGREEMENT
6. DISCLAIMER
IMPORTANT: Before running ∑ Chess 5, please read the License Agreement and
Disclaimer sections below and make sure you agree to all conditions.
_____________________________________________________________________
∑ Chess 5 is a very strong Macintosh chess program with an intuitive user interface and many
features. See the included manual Manual.html for details or visit the ∑ Chess web-site:
http://www.sigmachess.com
The author Ole K. Christensen can be contacted via e-mail at:
ole@sigmachess.com or ole@kagi.com
1. ∑ CHESS 5 LITE & PRO
∑ Chess 5 comes in two different versions: ∑ Chess 5 Lite and ∑ Chess 5 Pro.
∑ Chess 5 Lite is freeware and can be downloaded from the ∑ Chess web-site
http://www.sigmachess.com. Certain high-end features from the commercial version are either
disabled or limited in this free version. Nevertheless, it's a complete, full-strength chess
program with many features; it's not just a demo. If you're a casual chess player without the need
for special features, chances are that ∑ Chess 5 Lite will do just fine.
∑ Chess 5 Pro is not freeware, but a full featured commercial product. You must pay the $15
fee in order to register and become a legal owner of this version (see below for details on how to
register). Before deciding to buy and upgrade to the Pro version, we recommend that you stick
with ∑ Chess 5 Lite for a while, and get familiar with the program. This way you won't end up
paying for something that really wasn't what you expected.
The division of ∑ Chess 5 into Lite and Pro versions resembles the shareware concept in many
ways, but there are some important differences:
• The Lite version is time-unlimited freeware: You can use it for as long as you like, not just for
e.g. 30 days as for shareware products.
• Although some features are disabled/limited in the Lite version, it is still a complete,
full-strength chess program.
• When/if you upgrade to the commercial Pro version by paying the small $15 fee, you'll not only
relieve your conscience (after all) and make the author of ∑ Chess happy :-), you will also
benefit from all the new features which were disabled/limited in the Lite version.
2. HOW TO REGISTER & UPGRADE TO ∑ CHESS 5 PRO
The price for upgrading to ∑ Chess 5 Pro is only $15. Registration and payment is handled via
the internet payment service Kagi (www.kagi.com), and can be done in two ways:
• Register online on the secure Kagi server at https://order.kagi.com/?1CU. Only payment by
credit card is accepted.
• Start the Register ∑ Chess 5 Pro application, fill out the registration form and send it to
Kagi: If you are paying by credit card, you can send the form via e-mail (to sales@kagi.com)
or fax (to +1 510 652-6589). Payments sent via e-mail are processed within 3 to 4 days,
whereas payments via fax take up to 10 days. If you are paying with cash or USD check you
need to print the registration form and send it to the address included on the form.
In all cases, once your payment has been processed you will receive a confirmation e-mail from
Kagi. A few days later you will receive another e-mail from the author of ∑ Chess containing a
unique Serial Number and a personal License Key. In order to upgrade to ∑ Chess 5 Pro, you
then simply click the "Upgrade" button in the ∑ Chess 5 About dialog and enter this license
information. From then on ∑ Chess 5 will run in "Pro" mode with the full feature list enabled!
All future updates to ∑ Chess 5 Pro are provided free of charge for owners of ∑ Chess 5 Pro.
You simply need to download the new version 5.x.x and re-enter your license information.
3. SYSTEM REQUIREMENTS
∑ Chess 5 requires an Apple Macintosh or MacOS compatible meeting the following
requirements:
• Processor : Any PowerPC
• System Software : Mac OS 7.5 or later. Native (Carbon) compatibility with
Mac OS X will come in a later version.
• Monitor : 640 x 480 resolution or higher with at least 256 colours or grays.
However "Thousands of colors" or more is needed to use the 3D board.
• Memory : At least 3 MB, but 5 - 10 Mb or more is recommended in order to take full
advantage of the transposition tables and the 3D board.
4. LIMITED/DISABLED FEATURES IN THE LITE VERSION
Various features of interest to serious chess players are limited or disabled in the freeware
Lite version:
• Collections can contain a maximum of 1000 games.
• Opening/position libraries cannot be edited.
• Only the KQKR and KBNK endgame databases are included. The commercial Pro version
contains several other 4-piece endings.
• Automatic game annotation/analysis are disabled for collections.
• Diagrams are not printed when printing collections/online chess books.
• Transposition tables are limited to 10 MB, whereas the commercial Pro version can handle
transposition tables up to a size of 160 MB.
• At most three windows can opened simultaneously.
• Monitor mode is not available.
5. LICENSE AGREEMENT
Although ∑ Chess 5 Lite is freeware, it is copyrighted and NOT in the public domain. It may not be
modified in any way and may thus only be distributed in its original form (the "sigma-chess-5.sit"
file). It may not be sold, or included on a CD-ROM or any other physical media without explicit
permission by the author.
∑ Chess 5 Pro is NOT freeware, it is copyrighted and may not be redistributed in any way: It's
illegal to upgrade ∑ Chess 5 on two or more computers using the same Serial Number and License
Key.
Unless explicitly otherwise stated the above license also applies to all subsequent versions of
∑ Chess 5.x Lite & Pro.
6. DISCLAIMER
The ∑ Chess 5 software is provided as is without any warranties of any kind either express or
implied. By downloading, installing and/or using the ∑ Chess 5 software, the user/customer accepts
all responsibility and agrees that the author of ∑ Chess cannot be held responsible or liable for any
damage, data loss or harm of any kind whatsoever caused directly or indirectly by the installation
and/or usage of the ∑ Chess 5 software.