Free chess software for linux

Chess::PGN::EPD is a Perl extension to produce and manipulate EPD text.

SYNOPSIS

#!/usr/bin/perl
#
#
use warnings;
use strict;
use Chess::PGN::Parse;
use Chess::PGN::EPD;

if ($ARGV[0]) {
my $pgn = new Chess::PGN::Parse($ARGV[0]) or die "Cant open $ARGV[0]: $!n";
while ($pgn->read_game()) {
$pgn->parse_game();
print join ( "n", epdlist( @{$pgn->moves()} ) ), "nn";
}
}
OR
#!/usr/bin/perl
#
#
use warnings;
use strict;
use Chess::PGN::EPD;

my $position = rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq -;
print join("n",epdstr(epd => $position,type => latex));
OR
#!/usr/bin/perl
#
#
use strict;
use warnings;
use Chess::PGN::Parse;
use Chess::PGN::EPD;

if ($ARGV[0]) {
my $pgn = new Chess::PGN::Parse($ARGV[0]) or die "Cant open $ARGV[0]: $!n";
while ($pgn->read_game()) {
my @epd;

$pgn->parse_game();
@epd = reverse epdlist( @{$pgn->moves()} );
print [ECO,",epdcode(ECO,@epd),""]n";
print [NIC,",epdcode(NIC,@epd),""]n";
print [Opening,",epdcode(Opening,@epd),""]n";
}
}

MKGI Chess Club is a chess playing server with a pure Web interface.
It features complete player profile management, full html email notification with embedded board display.
MKGI Chess Club also features an interface to match against chess engines such as gnuchess, phalanx, and crafty.
Enhancements:
- Fixed the notification feature which was broken since 1.6.0.
- Fixed undo availability immediately after a move.
- Implemented partial dragndrop of pieces on the chess board.

Chess::PGN::Filter is a Perl extension for converting PGN files to other formats.

SYNOPSIS

use Chess::PGN::Filter;

filter(source => $pgn,filtertype => XML);
OR
my %substitutions = (
hsmyers => Myers, Hugh S (ID),
);

my @exclude = qw(
WhiteElo
BlackElo
EventDate
);

filter(
source => $pgn,
filtertype => TEXT,
substitutions => %substitutions,
nags => yes,
exclude => @exclude,
);
OR
filter(
source => $pgn,
filtertype => DOM,
);
OR
$dom = filter(
source => $pgn,
filtertype => DOM,
verbose => 0,
);

This is a typical text in one side, different text out the otherside filter module. There are as of this writing, the following supported choices:

1. XML -- Converts from .pgn to .xml using the included pgn.dtd as the validation document. This is for the most part a one to one transliteration of the PGN standard into XMLese. It does have the additional virtue of allowing positions to be encoded within the XML output. These are generated by an embedded NAG of {0} and automatically (user controlled) at the end of each game. As a kind of adjunct to the position diagrams, pgn.dtd optionally allows each move to include its FEN string. This allows scripted animation for web pages generated this information.
2. TEXT -- Although the PGN standard is widely available, many program that generate .pgn do so in an ill-formed way. This mode is an attempt to normalize away the various flaws found in the wild! This includes things like game text all on a single line without a preceding blank line. Or castling indicated with zeros rather than the letter O. There is at least one application that carefully indents the first move! The list of oddities is probably as long as the list of applications.
3. DOM -- A Document Object Model (DOM) makes for a very convenient interim form, common to all other filter types. Useful in both the design and debugging phases of filter construction. By way of self-documentation, here is an example of a single game that shows all of the obvious features of the DOM:

$VAR1 = {
Tags => {
Site => Boise (ID),
Event => Cabin Fever Open,
Round => 1,
ECO => ?,
Date => 1997.??.??,
White => Barrett Curtis,
Black => Myers Hugh S,
Result => 1-0
},
Gametext => [
{
Movenumber => 1,
Epd => rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3,
Movetext => e4
},
{
Movenumber => 2,
Epd => rnbqkbnr/ppp1pppp/8/3p4/4P3/8/PPPP1PPP/RNBQKBNR w KQkq d6,
Movetext => d5
},
{
Movenumber => 3,
Epd => rnbqkbnr/ppp1pppp/8/3pP3/8/8/PPPP1PPP/RNBQKBNR b KQkq -,
Movetext => e5
},
{
Movenumber => 4,
Comment => Playing ...Bf5 before closing the c8-h3 diagonal has some positive features.,
Epd => rnbqkbnr/ppp2ppp/4p3/3pP3/8/8/PPPP1PPP/RNBQKBNR w KQkq -,
Movetext => e6
},
{
Movenumber => 5,
Epd => rnbqkbnr/ppp2ppp/4p3/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq d3,
Movetext => d4
},
{
Movenumber => 6,
Comment => Time to think like a Frenchie - c7-c5!,
Epd => r1bqkbnr/ppp2ppp/2n1p3/3pP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -,
Movetext => Nc6,
Rav => [
{
Movenumber => 6,
Epd => rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq c6,
Movetext => c5
}
]
},
.
.
.
{
Movenumber => 29,
Comment => (Bxe5) Black could still kick for a while if he had played ...Bxe5.,
Epd => r1bq1rk1/2p1npb1/2n1p2P/pp1pP1p1/3P2P1/2P4Q/PP2BP2/RNB1K2R b KQ -,
Movetext => h6
}
]
};

ChessX is a free Open Source Chess Database for Linux, Windows, and Mac OS X. The project uses Qt library to create modern, portable graphical interface. Current development is aimed at providing full featured PGN database. Afterwards we will add more flexible native format.
History
The project was started after development of Scid halted and contact with the author was lost. Initially, ChessX was to be a community maintained version of Scid called "New Scid". However, after some initial development, it was decided to break away from the old code so that new ideas and modern interface can be implemented.
Main features:
- Multi-platform. Supports Linux, Microsoft Windows and Mac OS
- Read-only support for PGN Files
- Work with multiple databases simultaneously
- Browse games
- Navigate through game, including variations
- Copy/Paste FEN/PGN
- Enter moves, setup board position
- Basic header search (click on columns in GameList header)
- Player database with picture support

mChess is a simple cross-platform email chess program.

The aim is to be able to play chess with your friends via email using a nice user interface without having a chess board standing in your living room for weeks.

CBoard (Curses/Console Board) is an Ncurses frontend to chess engines supporting the XBoard protocol.

CBoard is still in development, but has quite a few features that make it usable. Supports reading and writing PGN including roster tags, RAV, FEN, NAG and comments. The move validator still needs work though.

Pos is an experimental chess program based not on the Shannon algorithm, but on several others. Pos is not a brute force system.

The algorithm used is determined by a genetic (evolutionary) algorithm.

How to run it?

In a terminal

When using the SUN Java 5.0 runtime environment, start it with "java -Xmx384M -jar pos.jar".

Xboard/WinBoard

The program should now fully support xboard/winboard. Start it with commandline "java -Xmx384M -jar pos.jar --io-mode xboard".

For example: xboard -firstChessProgram "java -Xmx384M -jar pos.jar --io-mode xboard"

Emacs Chess is an object-oriented library written in Elisp for manipulating chess objects (games, plies, positions, etc.), and for displaying them.
Main features:
- Emacs Chess is also an object-oriented library for manipulating chess objects (games, plies, positions, etc), and for displaying them. It supports a wide range of engine objects to use as move sources. This what allows chess.el to act as a chess client.
- chess-announce.el announces your opponents moves verbally, such as "knight takes at f4"provided you have "festival" installed.
- chess-sound.el is similar to chess-announce, but uses specific WAV files for each sound used. It takes up much more disk space, but is nicer to listen to. Available in English only at the moment.
- chess-irc.el provides a tiny IRC bot, allowing you to play games over IRC so long as your opponent enters moves in short algebraic notation. If they dont have chess.el, all they need is a regular chessboard, and a knowledge of SAN (short alegebraic notation).
- chess-ics.el lets you to play on Internet Chess Servers, using chess.el as your chessboard display (which means chess-announce works with it, etc). It has only been tested with FICS so far.
- chess-crafty.el, chess-gnuchess.el and chess-phalanx.el let you play against the Crafty, Gnuchess and Phalanx engines.
- chess-random.el will create Fischer Random positions to play against. Note that this feature only really works against opponents who are also using chess.el. Simply type "S" in the chessboard display buffer to setup a Fischer Random starting position.
- chess-network.el lets you play against other chess.el users directly, over a single open port on the server side. To be a server, you must have "netcat" installed, or be using Emacs 21.3 or higher (which supports server side network sockets). To be a client, all you need is Emacs 21.1 or higher.
- chess-link.el lets you tie two engines together, so that events from one are responded to by events from another. This can let you run a chess bot on your computer over any of the transport, or you can use it to pit two computer chess engines against each other.
- chess.el can even export chessboard display to other X servers, allowing you to play against people in your meeting room, even if they dont have Emacs installed!
Enhancements:
- This maintenance release includes several bugfixes.