@node Top, (dir), (dir), (dir)
@top GNU Shogi (Japanese chess)
-@ifinfo
+@ifnottex
@menu
* Introduction:: What is GNU shogi?
-* License:: The GNU General Public License.
* About shogi:: General information, rules, etc.
* gnushogi:: How to play GNU shogi (gnushogi).
* xshogi:: The X interface to GNU shogi.
* Bugs:: Where and how to report bugs.
* Index::
@end menu
-@end ifinfo
+@end ifnottex
@iftex
This document describes GNU shogi, a program which plays Japanese chess
@c Body.
@c =====
-@node Introduction, License, Top, Top
+@node Introduction, About shogi, Top, Top
@chapter Introduction
@cindex Introduction
@email{mvanier@@cs.caltech.edu}.
-GNU shogi is actually two programs:
-
-@sp 1
+GNU Shogi is actually two programs:
@table @samp
@end table
-@sp 1
-
Since xshogi invokes gnushogi, most players will just type ``xshogi''
and start playing.
well as men.
-
-@node License, About shogi, Introduction, Top
-@unnumbered GNU GENERAL PUBLIC LICENSE
-@cindex License
-@cindex GPL
-@center Version 2, June 1991
-
-@display
-Copyright @copyright{} 1989, 1991 Free Software Foundation, Inc.
-675 Mass Ave, Cambridge, MA 02139, USA
-
-Everyone is permitted to copy and distribute verbatim copies
-of this license document, but changing it is not allowed.
-@end display
-
-@unnumberedsec Preamble
-
- The licenses for most software are designed to take away your
-freedom to share and change it. By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software---to make sure the software is free for all its users. This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it. (Some other Free Software Foundation software is covered by
-the GNU Library General Public License instead.) You can apply it to
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-
- When we speak of free software, we are referring to freedom, not
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-
-@page
-@iftex
-@unnumberedsec TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-@end iftex
-@ifinfo
-@center TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-@end ifinfo
-
-@enumerate 0
-@item
-This License applies to any program or other work which contains
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-If the distribution and/or use of the Program is restricted in
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-If you wish to incorporate parts of the Program into other free
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-@page
-@iftex
-@heading NO WARRANTY
-@end iftex
-@ifinfo
-@center NO WARRANTY
-@end ifinfo
-
-@item
-BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
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-@end enumerate
-
-@iftex
-@heading END OF TERMS AND CONDITIONS
-@end iftex
-@ifinfo
-@center END OF TERMS AND CONDITIONS
-@end ifinfo
-
-@page
-@unnumberedsec How to Apply These Terms to Your New Programs
-
- If you develop a new program, and you want it to be of the greatest
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-Copyright (C) 19@var{yy} @var{name of author}
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-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
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-(at your option) any later version.
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-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
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-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-@end smallexample
-
-Also add information on how to contact you by electronic and paper mail.
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-If the program is interactive, make it output a short notice like this
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-@smallexample
-Gnomovision version 69, Copyright (C) 19@var{yy} @var{name of author}
-Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
-type `show w'.
-This is free software, and you are welcome to redistribute it
-under certain conditions; type `show c' for details.
-@end smallexample
-
-The hypothetical commands @samp{show w} and @samp{show c} should show
-the appropriate parts of the General Public License. Of course, the
-commands you use may be called something other than @samp{show w} and
-@samp{show c}; they could even be mouse-clicks or menu items---whatever
-suits your program.
-
-You should also get your employer (if you work as a programmer) or your
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-
-@smallexample
-Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-`Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-@var{signature of Ty Coon}, 1 April 1989
-Ty Coon, President of Vice
-@end smallexample
-
-This General Public License does not permit incorporating your program into
-proprietary programs. If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library. If this is what you want to do, use the GNU Library General
-Public License instead of this License.
-
-
-@node About shogi, gnushogi, License, Top
+@node About shogi, gnushogi, Introduction, Top
@chapter About the game of shogi
--- Alexander Alekhine @*
(quoted in David Pritchard, @cite{The Encyclopedia of Chess Variants})
-@sp 1
-
``... shogi [is] by far the most complex form of chess that has ever
achieved widespread popularity.''
--- R. Wayne Schmittberger, @cite{New Rules for Classic Games}
@end quotation
-@sp 1
-
Shogi is the version of chess played in Japan. It is strikingly
different from standard chess (which I shall refer to henceforth as
``international chess'') and also to all other regional variants,
because captured pieces can re-enter play on the side of the capturer.
This has several interesting effects on the play of the game:
-@sp 1
-
@enumerate
@item
Shogi is much more complex than international chess, at least in
@end enumerate
-@sp 1
-
Shogi is extremely popular in Japan; it has been estimated that 20
million Japanese can play shogi, of which perhaps 1 million are active
players. It is even more popular there than the game of go, Japan's
and to the difficulty of finding opponents. I hope that GNU shogi will
help introduce shogi to a wider audience.
-@ifinfo
+@ifnottex
@menu
* The rules of shogi::
* Sample game::
* Shogi variants::
* Differences between shogi and chess::
@end menu
-@end ifinfo
+@end ifnottex
@c -------------------------------------------------------
Each player begins with 20 pieces, described in the next section.
Capture is by displacement, as in international chess.
-@ifinfo
+@ifnottex
@menu
* The moves of the pieces::
* The opening setup::
* Handicaps::
* Notes for chess players::
@end menu
-@end ifinfo
+@end ifnottex
@c The moves of the pieces.
The opening setup for shogi is as follows:
-@ifinfo
-
+@ifnottex
+@verbatim
9 8 7 6 5 4 3 2 1
-+---------------------------------------------+ @*
-| wL | wN | wS | wG | wK | wG | wS | wN | wL | a @*
-+---------------------------------------------+ @*
-| | wR | | | | | | wB | | b @*
-+---------------------------------------------+ @*
-| wP | wP | wP | wP | wP | wP | wP | wP | wP | c @*
-+---------------------------------------------+ @*
-| | | | | | | | | | d @*
-+---------------------------------------------+ @*
-| | | | | | | | | | e @*
-+---------------------------------------------+ @*
-| | | | | | | | | | f @*
-+---------------------------------------------+ @*
-| bP | bP | bP | bP | bP | bP | bP | bP | bP | g @*
-+---------------------------------------------+ @*
-| | bB | | | | | | bR | | h @*
-+---------------------------------------------+ @*
-| bL | bN | bS | bG | bK | bG | bS | bN | bL | i @*
+---------------------------------------------+
-@end ifinfo
+| wL | wN | wS | wG | wK | wG | wS | wN | wL | a
++---------------------------------------------+
+| | wR | | | | | | wB | | b
++---------------------------------------------+
+| wP | wP | wP | wP | wP | wP | wP | wP | wP | c
++---------------------------------------------+
+| | | | | | | | | | d
++---------------------------------------------+
+| | | | | | | | | | e
++---------------------------------------------+
+| | | | | | | | | | f
++---------------------------------------------+
+| bP | bP | bP | bP | bP | bP | bP | bP | bP | g
++---------------------------------------------+
+| | bB | | | | | | bR | | h
++---------------------------------------------+
+| bL | bN | bS | bG | bK | bG | bS | bN | bL | i
++---------------------------------------------+
+@end verbatim
+@end ifnottex
@c The following TeX macros are taken with permission from
@c "TeX for the Beginner" by Wynter Snow.
\endVerbatim
@end tex
-@sp 1
-
Here, ``b'' stands for ``black'' and ``w'' stands for ``white'', so
that, for instance, ``bL'' means ``black lance''. The numbers above the
files and the letters to the right of the ranks represent the most
@end table
-@sp 1
-
The three ranks furthest away from each player constitute his/her
``promotion zone''. A player may, but is not required to, promote a
piece after making a move in which the piece begins and/or ends in the
the promotion zone, out of the promotion zone, or entirely within the
promotion zone. Promotion is mandatory in these cases:
-@sp 1
-
@enumerate
@item You must promote a pawn or a lance after moving it to the last rank.
@end enumerate
-@sp 1
-
These forced promotions ensure that a piece cannot be moved to a square
from which it would have no further move.
play as a consequence of the drop rule. In fact, most of the ways a
game can be drawn in chess are not allowed in shogi:
-@sp 1
-
@itemize @bullet
@item Draws cannot be offered.
@end itemize
-@sp 1
-
There are only two legal ways in which a draw can occur:
-@sp 1
-
@enumerate
@item A position (including the pieces in hand) occurs 4 times with the same
@end enumerate
-@sp 1
-
@c Handicaps.
@node Handicaps, Notes for chess players, Draws, The rules of shogi
Tony Hoskings (@pxref{References and links}) and, I believe, represent
current Japanese practice.
-@sp 1
-
@enumerate
@item
@end enumerate
-@sp 1
-
Another advantage of playing handicap games is that the handicaps alter
the optimal strategy for both players. For instance, handicaps all have
their own opening lines which may bear little or no resemblance to those
Here are a few miscellaneous things that may confuse chess players.
Some of these have been mentioned elsewhere, but they bear repeating.
-@sp 1
-
@enumerate
@item There is no queen.
@end enumerate
-@sp 1
-
@c
@c Sample game.
@c
check), your opponent moves, and you move to give checkmate is called a
three-mover. Here is a really trivial three-mover:
-@sp 1
-
-@ifinfo
-
- 3 2 1 @*
-----------------+ @*
-| | | | a @*
-----------------+ @*
-| | | wK | b @*
-----------------+ @*
-| | | | c @*
-----------------+ @*
-| bN | | | d @*
-----------------+ @*
-| | | | e @*
-----------------+ @*
-| | bN | | f @*
-----------------+ @*
-
-@sp 1
+@ifnottex
+@verbatim
+ 3 2 1
+----------------+
+| | | | a
+----------------+
+| | | wK | b
+----------------+
+| | | | c
+----------------+
+| bN | | | d
+----------------+
+| | | | e
+----------------+
+| | bN | | f
+----------------+
Black in hand: S, G
-
-@end ifinfo
+@end verbatim
+@end ifnottex
@tex
\endVerbatim
@end tex
-@sp 1
-
Here, Black plays G*2b, White plays K1c, and Black plays G*1d mate.
More typical tsume problems range from 5 moves to arbitrarily high
numbers of moves, and they can be quite brain-busting. Tsume problems
The historical variants include:
-@sp 1
-
@enumerate
@item
@end enumerate
-@sp 1
-
@c
@c Differences between shogi and chess.
@c
Here are the significant differences between chess and shogi:
-@sp 1
-
@enumerate
@item
@end enumerate
-@sp 1
-
The effects of all these differences on play include (in my opinion):
-@sp 1
-
@enumerate
@item
@end enumerate
-@sp 1
-
@c --------------------
@c gnushogi.
This section describes how to run the ``gnushogi'' program.
-@sp 1
-
SYNOPSIS
-@sp 1
-
gnushogi [ [[-]a] [-b bookfile] [-B binbookfile] [-C] [-h langfile]
[-L langfile] [-r length] [-R] [-s pathname] [-l pathname] [-S binbooksize]
[-t] [-c size] [-T size] [-v] [-x] [-X] arg1 arg2 ]
-@sp 1
-
DESCRIPTION
-@sp 1
-
GNU shogi (gnushogi) plays a game of japanese chess (shogi) against the
user or it plays against itself.
gnushogi.bbk which is located in a directory specified in the Makefile.
To invoke the program type:
-@sp 1
-
@table @samp
@item gnushogi -C
raw test display version
@end table
-@sp 1
-
TIME CONTROLS
-@sp 1
-
If one argument is given, it is the search time per move in
[minutes:]seconds. So gnushogi 30 will generate one move every 30
seconds, while gnushogi 5:00 will generate one move every 5 minutes.
For use with xshogi see the documentation on that program.
@xref{xshogi}.
-@sp 1
-
@page
BOOK
-@sp 1
-
The book gnushogi.tbk consists of a sequence of openings. An opening
begins with a line starting with a # (the rest of the line is a comment).
Following this is a series of moves in algebraic notation alternating
are stored as position:move so transpositions between openings can take
place.
-@sp 1
-
HASHFILE
-@sp 1
-
The hashfile if created should be on the order of 4 megabytes; you can
create such a hashfile by typing ``gnushogi -c 22'' (see below). This
file contains positions and moves learned from previous games. If a
hashfile than without, but it is not clear yet whether it provides a
real advantage.
-@sp 1
-
LEGAL MOVES
-@sp 1
-
Note: Piece letters are determined by the language file. What is
specified here is the default (English).
the move, as in 2d2c+ or P2c+. Note that you must use capital letters
for the pieces by default.
-@sp 1
-
COMMAND-LINE OPTIONS
-@sp 1
-
@table @samp
@item -a
@end table
-@sp 1
COMMANDS
-@sp 1
-
In addition to legal moves, the following commands can be entered at the
gnushogi prompt. Note: command names are determined by the language
file and may vary with the implementation. The default language is
@end table
-@sp 1
-
@c --------------------
@c xshogi.
This section describes how to run the ``xshogi'' program.
-@sp 1
-
SYNOPSIS
-@sp 1
-
xshogi [ options ]
-@sp 1
-
DESCRIPTION
-@sp 1
-
xshogi provides an X11/Xt/Athena Widgets user interface for gnushogi.
With xshogi you can play gnushogi, set up arbitrary positions, force
variations, or watch xshogi manage a game between two shogi programs.
mouse to another square. If the move is illegal, gnushogi will not
allow it. xshogi will then retract the move.
-@sp 1
-
COMMAND-LINE OPTIONS
-@sp 1
-
The following command line options also correspond to X resources that
you can set in your .Xdefaults file.
-@sp 1
-
@table @samp
@item [standard Xt options]
@end table
-@sp 1
-
@page
OTHER X RESOURCES
-@sp 1
-
@table @samp
@item initString
@end table
-@sp 1
-
COMMAND BUTTONS AND KEYS
-@sp 1
-
@table @samp
@item Quit
@end table
-@sp 1
-
LIMITATIONS
-@sp 1
-
If you press the Pause button during GNU Shogi's turn,
xshogi will stop the clocks, but gnushogi will still make a
move.
The game parser recognizes only algebraic notation.
-@sp 1
-
AUTHORS
-@sp 1
-
Original authors of XBoard: Chris Sears and Dan Sears.
Enhancements for XBoard (Version 2.0): Tim Mann.
Current maintainer: Mike Vanier.
-@sp 1
-
COPYRIGHT INFORMATION
-@sp 1
-
XShogi borrows its piece bitmaps from CRANES Shogi.
Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts.
There are very few English-language books for people learning shogi.
The two I recommend are:
-@sp 1
-
@enumerate
@item
@end enumerate
-@sp 1
-
Another book you may find is @cite{Shogi: Japan's Game of Strategy} by
Trevor Leggett. This book is very elementary and is somewhat outdated,
having been published first in 1966. However, it does feature a paper
Shogi sets are available from:
-@sp 1
-
@quotation
George F. Hodges @*
P.O. Box 77 @*
United Kingdom BR1 2WT
@end quotation
-@sp 1
-
George also sells equipment for all the historical shogi variants
(@pxref{Shogi variants}) (except for Kyoku tai shogi) and also sells
back issues of the magazine ``Shogi'' which he published for 70 issues
Here are some useful URLs:
-@sp 1
-
@table @asis
@item Pieter Stouten's shogi page: @uref{http://www.shogi.net}
@end table
-@sp 1
-
@c -----------------
@c Acknowledgements.
@c -----------------
I would like to thank the following people:
-@sp 1
-
@itemize @bullet
@item
@end itemize
-@sp 1
-
@c -----
@c Bugs.
@c -----
projects / gnushogi.git / blobdiff