.TH crafty 6 "July 23, 2013" "23.4" "Games"
.SH NAME
crafty \- a chess playing/analysis program
.SH SYNOPSIS
.B crafty
.SH DESCRIPTION
.B crafty
is a chess playing and analysis program modeled after Cray Blitz.
It supports opening books and endgame databases.
While you
.B can
run it on a text console you will probably prefer a graphical
interface. In that case use
.B xcrafty
which uses
.BR xboard (6).

.B crafty
is a state-of-the-art  computer  chess  program,  and
uses  all  of  the  search algorithms you have probably read
about, negascout search, killer/history move  ordering,
quiescence move ordering and
pruning, hash (transposition/refutation) tables as  well  as
evaluation caches, selective extensions, recursive null-move
search, and a host of other features that have been used and
are  still  being  used in most computer chess programs.  If
it's not in
.BR crafty ,
either it is on the "to do" list, or  it
has been tried, found wanting, and discarded.

.BR crafty 's
strength is directly dependant upon processor speed, hash table size,
size and content of it's opening book, and it's use of an endgame database.
Versions of
.B crafty
running on ICC and FICS have ratings around 2500-2700.

This
.B crafty
package
comes with a basic opening book and a small endgame database
(all the 3 piece tablebase files). You can get a more complete
opening book (created from 650000+ games) and a huge
endgame database (about 5 GByte) from
.BR crafty 's
site at
.fi
.IR ftp://ftp.cis.uab.edu/pub/hyatt
or
.IR http://www.cis.uab.edu/hyatt/crafty .

A more extensive documentation is available in
.fi
.IR /usr/share/doc/packages/crafty .

.SH FILES
.TP
.I ~/.craftyrc
.BR crafty 's
startup file. Contains commands executed by
.B crafty
automatically during startup.
.TP
.I ~/.crafty/book.bin
.BR crafty 's
opening book.
.TP
.I ~/.crafty/book.lrn
Things learned, in human readable form.
.TP
.I ~/.crafty/books.bin
Controls
.BR crafty 's
opening strategy.
.TP
.I ~/.crafty/position.bin
Learned positional information.
.TP
.I ~/.crafty/position.lrn
Learned positional information in human readable form.
.TP
.I  ~/.crafty/game.*
Your played games.
.TP
.I ~/.crafty/log.*
Complete
.B crafty
output produced during the game.
.TP
.I /etc/crafty.rc
.BR crafty 's
global startup file. Contains commands executed by
.B crafty
automatically during startup. It is overriden by ~/.craftyrc.
.TP
.I /usr/share/crafty
Location of the default opening books.
.TP
.I /usr/share/crafty/TB
Endgame tablebases. Get more from
.BR crafty 's
site. :-)
.SH BUGS
If you use 
.B crafty
as a
.BR xboard (6)
client and exit
.BR xboard (6)
using your window managers close button,
.B crafty
might not finish at all and run forever.
.fi
Well, this might actually be considered a
.BR xboard (6)
bug.
.SH SEE ALSO
.nf
xboard(6)
.fi