Free chess games software for mac

J2chess is a nice chess game created in Java. Consequently j2chess can run on any platform where a Java Virtual Machine is installed (version 1.4.x or later recommended).
j2chess includes an opening book of 15,000 games and can play games in three different modes; casual, blitz and blitz Fisher. j2chess can read ".pgn" library files and therefore can be used as a ".pgn" browser as well.
As a matter of fact, j2chess is a pure hobby project and its development progress is fairly slow! But who minds? ;-)
I just hope Ill give you the opportunity to have fun playing chess. You can also help me to improve j2chess by sending me your feedback via email. j2chess is a freeware but if you enjoy it you can always say "Thank you" by making a donation.
Main features:
- run potentialy on all platform (java 2)
- strength and other various settings can be changed
- casual, blitz and blitz Fisher style available for new games
- opening book with about 15,000 games
- load games in Portable Game Notation (PGN)
- internationalisation (EN and FR languages are supported, default is EN).

Chess Training Tools is a collection of chess training tools. It includes a chess visualization trainer that teaches chess visualization by drilling you on the color of a particular square, and also on your ability to tell if two squares are the same color, if two (or three) squares are on the same diagonal, if two squares are a knight move apart, or if two squares are two knight moves apart.
This is a program that I wrote for my own use to improve my chess visualization ability. I decided to share it with other players, since I believe they can benefit from it. It basically helps you remember what color the squares are, how the pieces move, and so on, all in your head.
It does so by posing you various excercises that, if practiced every day, will let you visualize positions without the aid of a board.
I use this tool every day. You may want to use it the way I do, or you could develop your own method of training. I work my way through the panels, doing 20 of each excercise. I proceed Color->Same Color->Diagonal 2->Diagonal 3->Knight->Knight 2->Mate.
Then, after all of that I play a game against Vince. Start slow, by either lagging the display by one ply, or by blanking out one quadrant. Work your way up to the 7 ply and four quadrants.
Enhancements:
- This release added undo, or move takeback to the PlayTest ("Vince").

Major Features:

1. Universal binary supporting both Intel and PowerPC based Macintosh computers
2. Optimized 64-bit version for Mac OS X 10.6 Snow Leopard with multi-processor support for Crafty
3. Nice anti-aliased scalable/resizable configurable game board leveraging the Quartz display engine
4. Support for professional chess fonts like Linares, Zurich and Hastings as well as two free sets
5. Graphical "seek" window to find available game opponents
6. Graphical annotation of examined games using Bob Hyatt's Crafty chess engine
7. Game history list
8. Integrated timestamp client support to eliminate the effects of internet latencies
9. Flexible seek list for advertising which types of games you want to play
10. Examine/observe games other than your own
11. Sound alerts when 30,20,10 seconds remain of your alloted time
12. Ability to save games in PGN (portable game notation) format
13. Uses Mac OS X UI features like toolbars, drawers and sheets where appropriate.

Requirements: For Mac OS X 10.6 Snow Leopard (64-bit only).

Chrss is a free and easy to use correspondance chess Dashboard widget by rss service and written in Python using Turbogears.

Enhancements:
- Improved 3D look.
- Better behaviour when user name is unknown (shows link to signup page).
- Fixed link to main-site.

ExaChess 4.0.2 is designed to be a handy, richly-featured chess-database program which can be used for the Macintosh. It can manage a database of millions of master games, serve as a chessboard to play through games, and be used as a tool to record and annotate your own games, to play games against the computer, or to play perfect endgames.

Major Features:

1. Direct support (without conversion) of PGN, ChessBase (CBF), and NICBase databases, as well as ExaChess's own database formats.
2. Search across any number of databases or just a single database file by player name, event, year, result, ECO code, opening name, position, partial position, material, special game features, or any combination of these.
3. Resizable, customizable 2-D color board with smooth animation.
4. Flexible game parser that handles free-form text input, both algebraic and descriptive, including move and position evaluations, variations and text comments.
5. Records full tree of moves. Switch to variation or return to main line.
6. Shows opening tree (next moves for any opening position) with stats from the database. Quickly find matching games in database for any opening position.
7. Supports play against external 'chess engines' or against the database via the UCI protocol or Apple Events, including Fruit 2.1 (supplied), ZZZZZZ (supplied), Hiarcs, Crafty, GnuChess, and MacChess. Supports automatic annotation of chess games via the chess engines.

iPhone chess board which supports communication with chess engines using the xboard protocol.
iPhone Chess seems to be mostly playable, but i would like to add some new features like piece exchange and en passant pawn taking.
I think the general game mechanics should work fairly reliably, although I think castling may cause some crazy stuff to happen at times, keep an eye out :) Id love to get any feedback about this, its my first Obj-C app, let alone for the iPhone.
System requirements:
- iPhone