Contents

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Download Sigma Chess 6.1.6 & HIARCS 12

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IMPORTANT: You must copy the enclosed Sigma 6.1.6 HIARCS 12 folder to your hard drive before starting Sigma Chess. Do NOT run it directly from within the downloaded volume.

This version includes the following:

Now bundled with the new HIARCS 12 engine! This engine is a Universal Binary and thus runs at full speed on Intel Macs. Additionally, a multi processor version is available for even stronger play.

Note for OS 9 Users: The HIARCS engine and other UCI engines are only available on OS X. However, you can still use Sigma's built-in engine.

Note for owners of previous versions of Sigma Chess 6.x Pro: Sigma Chess 6.1.6 is a FREE upgrade, and will automatically run in Pro mode if Sigma Chess 6.1.5 Pro is currently installed. For earlier versions of Sigma you will need to enter your license key again.

Sigma Chess 6.1 Lite Restrictions

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As mentioned on the main page, Sigma Chess 6.1 Lite is freeware. Although it's a complete, full strength chess program and not just a demo, certain high end features of the commercial Sigma Chess 6.1 Pro version are either limited or disabled:

The new position and opening line filters are only available for collections with at most 100 games.

The new player rating history graph only shows the first 10 games.

Collections can contain a maximum of 1000 games.

Changes to opening/position libraries cannot be saved.

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.

Diagrams are not included when exporting collections/online chess books to HTML

Transposition tables are limited to 10 MB, whereas the commercial version can handle transposition tables up to a size of 320 MB.

At most three windows can be opened simultaneously.

Monitor mode is not available.

UCI engines are limited to max 64 MB transposition/hash tables.

UCI engines cannot reduce the playing strength to a specific ELO setting.

UCI engines cannot access Nalimov tablebases.

Additional Downloads

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Piece set and Board plug-ins
3rd party downloads

Sigma Chess 6.1 supports third party piece set and board plug-ins. The links below contain some sample plug-ins that you can download and move to the new "Plug-ins" folder (the author's name is shown in brackets). See the readme files in the "Plug-ins" folder for more details:

Victor Carbajo's Piece sets & Boards
Victor Carbajo has designed a lot of beautiful plug-ins for Sigma! Check out his web site here: Victor Carbajo's Piece sets & Boards

2D Piece Set Plug-ins
Round Clean (Victor Carbajo) NEW
Soft European (Victor Carbajo) NEW
Tube (Victor Carbajo) NEW
Round (Juan Frias)
Emerald & Gold
Geometric (Alistair McNally)
Stylized Staunton (Alistair McNally)
Red & White (Lalo Tejeda)

2D Board Plug-ins
Ash (Alistair McNally)
Diagram (Alistair McNally)
Green Marble (Alistair McNally)
Mahogany (Alistair McNally)
Walnut (Alistair McNally)
Mahogany II (Claus Marcus)
Marble II (Claus Marcus)
Wood II (Claus Marcus)
Pink Rock (Claus Marcus)
Marble Rose (Claus Marcus)
Tiger (Doug Andersen)
Brown Leather (Doug Andersen)
Red Leather (Doug Andersen)
Kids Blocks (Doug Andersen) Large board
Kids Rainbow (Doug Andersen) Large board
Wood III (Hanspeter Konrad)
Wood IV (Hanspeter Konrad)
Wood V (Hanspeter Konrad)
Wood VI (Hanspeter Konrad)
Wood VII (Hanspeter Konrad)
Metall (Hanspeter Konrad)
Green (Hanspeter Konrad)

Macintosh Chess Pages
Compiled by Jorge Salas

For many years Jorge Salas has maintained a very comprehensive list of games, but no longer has the time to maintain it. Jorge has now converted all the game material to the Sigma Chess format! Each database is only a 4K-40K download at most, so it's VERY modem friendly:

Macintosh Chess Pages
All game material in Sigma Chess format.

Annotated Game Studies
Compiled by Mederic

The latest list of annotated games:

D31 (20 KB) NEW
D44 (20 KB) NEW
D85 (40 KB) NEW

C67 Berlin Wall (40 KB)
C99 Chigorin (20 KB)

B33 Cheliabinsk (104 KB)
C89 (32 KB)

[B33] Master of Pelikan! (21 KB)
A43 Benoni study (8 KB)
Kasparov Deep Junior NY 2003 (18 K)
King's Indian Attack!! (18 KB)
Slav Monograph!! (17 KB)

High quality studies with English annotations; this time - as the title implies - a selection of games with fianchetto themes!

Fianchetto Boggie!! (40 KB)

Studies, complete with English annotations; for the Pirc Alert! and The Slow Slav (D12). Games from the recent Kramnik-Deep Fritz 2002 match are also included.

Opening Studies II (28 KB)

Opening studies for Sozin Attack, Petroff's Defense, Paulsen, Anti-Marshall and English/Scheveningen can be downloaded below:

Opening Studies I (696 KB)

Opening Libraries
Compiled by Mederic

A very complete opening library with more than 137.000 positions for d4/e4/c4/Nf3/g3/b4/b3:

Download Training Library (1.1 MB)

The latest list of annotated opening libraries:

A43 Benoni E.C.O. (8 KB)
A43 Masters of Benoni (80 KB)
B42 Paulsen (Pro) (104 KB)
B44 Tajmanov (Pro) (98 KB)
B92 Najdorf (Pro) (76 KB)
D45 Meran (Pro) (124 KB)
Master of KIA!! (488 KB)

Opening library with many annotations (in French), including more complete support for the Sicilian, Ruy Lopez, French, Caro-Kann, King's indian, Queen's gambit and many others.

Download French Library II (368 KB)

Installation: After download, copy the library to the Sigma Chess 6.1 folder, start the Sigma Chess application and open the library from the File/Open menu.