Free online chess software for linux

Tonic Chess project is an online chess software.

Tonic is a graphical interface for playing online chess. It is based on Jin.

From now on Tonic is really open source software (and free as in libre as well) - I managed (I had some problems last time I tried) to import source to cvs sourceforge repository. It is a bridge2 release source with few little modifications. You can read how to get it from cvs here. If you are impatient pastenenter in console:

cvs -d:pserver:anonymous@tonic-chess.cvs.sourceforge.net:/cvsroot/tonic-chess login

When prompted for password just hit enter. And then:

cvs -z3 -d:pserver:anonymous@tonic-chess.cvs.sourceforge.net:/cvsroot/tonic-chess co -P tonic

You should see a list of files downloaded from cvs repository. If you are a non-console user (i.e. Windows or Mac user) I recommend visiting this site. I myself use Linux for development. And Netbeans sometimes as you could figure out from examining the contents of tonic directory. So, enjoy the opensourceness of Tonic!

I uploaded new screenshot to Tonic project site. It is Tonic in Aero GTK engine tuxedo. Quite a peculiar engine imo, but you can use other GTK engines if you run Tonic in Java 6 aka Mustang (you know you can get it from here, dont you?) I test Tonic with Mustang and Ive problems with tray icon. After some searching Ive realized why Tonic crashed under Java 6 - the problem was tray.jar plugin and its dependencies - tray.so or tray.dll, so if you want to run Tonic on Java 6 move them away from theirs directory. Ive written a class for tray icon using new desktop API from Mustang, but it doesnt work as expected in KDE (tray icon is invisible) ; GNOME is better, but I have to work on the popup menu. Well, what could I say? Mustang is in beta stage, but it has some goodies to wait for (early splashscreen, access to tab component, ...).

AntiChess project is an anti-chess game.

AntiChess is an anti-chess game written in Java.

The goal is to get checkmated or lose all your pieces except your king to your opponent.

You must take your opponents pieces if you can.

It supports 2 player and 4 player games on the same board

VDB Chinese Chess is a Chinese chess program which uses pictures instead of Chinese letters so people who arent Chinese can play it. VDB Chinese Chess supports 99 levels and different computer levels can play against each other.
Installation :
Step 1: Make sure that all necessary components are installed!
This program needs:
1. g++: Gnu c++ support including header files
2. xaw3d: 3D-extension for the Athena Widget Set if you cannot find it you can change xaw3d by xaw in src/Makefile.in but the program will not look so nicely
3. Standard Template Library
Actually this program will use only one header file for the function max(), that returns the maximum of two values. You can implement that yourself. 4. xpm: this is a library for icons in x- all board pieces are implemented with this library, this library is very common under X, so it should be included in your distribution 5. pthread: this is used for multithreading, sometimes also called pthreads, you might have to change this in your src/Makefile.in
Step 2:download this program and unzip it in the directory you want to run it. There is NO separate installation directory! tar xfz cchess.tar.gz
Step 3: cd cchess_dist/cchess
Step 4: ./configure
make
make install
Rules of Chinese Chess:
Indeed, Chinese Chess is very similar to Chess but there are some differences according how to move your pieces on the board and the following:
1. You cannot exchange the pawn against some other piece if you reach the end of the board
2. There is no rochade and moving "en passant"
3. You lose the game also if you are stalemate
4. If both kings are on the same column there must be one piece between them
5. If there is three times the same position because of the same moves you must move different next time
6. The pieces are not black and white but red and black. Red moves first.
There are the following important locations:
The two palaces, each consists of nine fields marked by two diagonal lines.
The river: The area in the middle of the board, that is not interrupted by lines
The pieces on the board move the following way:
King: Can only move one field forward or to the side, not diagonal. Has to stay inside the palace
Pawn: Moves one field forward. If he is beyond the river he can also moves side wards
Rock: Moves one or more fields to the side, forward, backward but not diagonal
Cannon: Moves one or more fields to the side, forward, backward but not diagonal. Must always jump over one piece!
Horse: Moves one field straight, one field diagonal, cannot move over another piece.
Elephant: Moves exactly 2 fields diagonal, cannot move over the river
Mandarin: Has to stay inside the palace. Moves one field diagonal.
Enhancements:
- This release fixes some defects in the game strategy.

CHEOPS Chess project is a C++ chess engine.

CHEOPS (CHEss OPponent Simulator), or Χεοψ, is a fully-functional AI chess program capable of human vs. human, human vs. computer, and computer vs. computer play. It uses a 64-square linear array board representation.

The game tree search is alpha-beta, and the static evaluation function considers material, mobility, and motif features.

CHEOPS comes with extensive documentation on the program internals, aimed at students or programmers wishing to understand or extend the system.

ChessY! project allows you to visually review the game histories from Yahoo! online chess.

You can email to yourself at the end of a Yahoo! online chess game.

PicoChess project is a small chess program.

PicoChess will support one and two player games, as well as playing against itself. It can also load and save games, and export transcripts of games.

Wurm Online is 3D FPP MMORPG game.

Online multiplayer role-playing game, where players walk freely in a big 3D world chatting, gathering resources, building towns, making items, trading, fighting with other players and computer controlled creatures. Chose your path - crafting or PvP fighting. Join a village or live solo. Massive skill tree with skill affected by your actions.