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       gnushogi - GNU Shogi (Japanese Chess), version 1.3


       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 ]


       Gnushogi  plays a game of japanese chess (shogi) against the user or it
       plays against itself.

       At startup Gnushogi reads the binbook file if it is  present.  It  then
       looks  for  a  book  file. If it is present it adds its contents to the
       binbook data. If the binbook file is writable a  new  combined  binbook
       file is written.

       Gnushogi  is  a  modified  version  of  the gnuchess program.  It has a
       simple alphanumeric board display, or it can be compiled for  use  with
       the xshogi program under X windows.  The program gets its opening moves
       from the file gnushogi.bbk which is located in a directory specified in
       the Makefile.  To invoke the program type:

       gnushogi -C
              - simple curses based version

       gnushogi -X (or just gnushogi)
              - xshogi compatible version

       gnushogi -R
              - raw test display version


       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.

       If two or more arguments are given, they will be used to set tournament
       time controls with the first argument of each pair being the number  of
       moves  and  the second being the total clock time in minutes[:seconds].
       Thus, entering gnushogi 60 5 will set the clocks  for  5  minutes  (300
       seconds)  for  the  first  60  moves, and gnushogi 30 3:30 will allow 3
       minutes and 30 seconds for 30 moves.

       gnushogi 30 5 1 :30 will allow 5 minutes for the first 30 moves and  30
       seconds  for  each  move  after that.  Up to 4 pairs of controls may be

       If no argument is given the program will prompt the user for  level  of

       For use with xshogi see the documentation on that program.


       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 black and white separated by white space. A move may have a
       ?  after it indicating this move should never be made in this position.
       Moves are stored as position:move so  transpositions  between  openings
       can take place.


       The  hashfile  if  created  should  be  on  the order of 4 megabytes or
       gnushogi -c 22.  This file contains positions and  moves  learned  from
       previous  games.   If  a hashfile is used the computer makes use of the
       experience it gained in past games. Tests run so far show that it plays
       no  worse  with  the  hashfile  than  without,  but it is not clear yet
       whether it provides a real advantage.


       Note: Piece letters are determined  by  the  language  file.   What  is
       specified here is the default (English).

       Once gnushogi is invoked, the program will display the board and prompt
       the user for a move. To enter a move, use the notation 7g7f  where  the
       first  letter-number  pair  indicates  the origin square and the second
       letter-number pair indicates the destination square.  An alternative is
       to use the notation P7f where the first letter indicates the piece type
       (P,L,N,S,G,B,R,K).  To promote append a + the type of the new piece  to
       the  move, as in 2d2c+ or P2c+.  Note that you must use capital letters
       for the pieces by default.


       -a     Do not search on opponent’s time.

       a      Do search on opponent’s time.

       -b bookfile
              Use bookfile for opening book.

       -B binbookfile
              Use binbookfile for binary opening book.

       -c size
              Create  a  new  HASHFILE.  File  size  is  2^size   entries   of
              approximately 65+? bytes.

       -C     Use curses-based display mode.

       -h     Do not use hashfile.

       h      Do use hashfile.

       -l pathname
              Pathname of the loadfile use with get or xget.

       -L lang
              Use  language  lang  from  the file gnushogi.lang.  If -L is not
              specified it uses the first language in the file.

       -P plylevels
              Number of plys to include in the binbookfile. For  generating  a

       -r length
              Rehash  length  times  in  searching   entries  for  position in
              transposition table.

       -R     Use raw text display mode.  This can be used for dumb  terminals
              or for systems that don’t have curses.

       -s pathname
              Pathname of the save file to use with the save command.

       -S size
              Size  of  binbookfile  for  memory  based  books. For creating a

       -t     Show statistics for HASHFILE

       -T size
              Set the transposition table size to 2^size entries.

       -v     Show version and patchlevel.

       -x value
              Use value as the evaluation window xwndw.

       -X     Use xshogi display mode (the default).


       In addition to legal moves, the following  commands  are  available  as
       responses.  Note: command names are determined by the language file and
       may vary with the implementation. The default language is English.

       alg -- allow algebraic input (not implemented)

       Awindow -- change Alpha window (default score + 90)

       Bwindow -- change Beta window (default score - 90)

       beep -- toggles beeping after each move (default: on).

       bd -- updates the current board position on the display.

       book -- turns off use of the opening library.

       both -- causes the computer to play both sides of a shogi game.

       black -- causes the computer to take the white pieces, if the  computer
       is to move first.

       bsave  --  saves  a  game to disk as a book textfile.  The program will
       prompt the user for a file name.

       gamein -- toggles game mode time control. Assumes  the  time  specified
       for time control is the time for a complete game.  Input with the level
       command should be the game time and the expected number of moves  in  a
       game.  go command must be given.

       coords -- show coordinates on the display (visual only)

       contempt -- allows the value of contempt to be modified.

       debug  --   asks for a piece as color piece, as wb or bn, and shows its
       calculated value on each square.

       debuglevel --  sets level of debugging output if  compiled  with  debug

       depth  --  allows  the  user to change the search depth of the program.
       The maximum depth is 29 ply.  Normally the depth is set to 29  and  the
       computer terminates its search based on elapsed time rather than depth.
       If depth is set to (say) 4 ply, the program will search until all moves
       have  been  examined  to  a  depth  of  4 ply (with extensions up to 11
       additional ply for sequences of checks and captures).   If  you  set  a
       maximum  time  per move and also use the depth command, the search will
       stop at the specified time or  the  specified  depth,  whichever  comes

       easy  -- toggles easy mode (thinking on opponents time) on and off. The
       default is easy mode ON.  If easy mode is  disabled,  the  keyboard  is
       polled  for  input  every so often and when input is seen the search is
       terminated. It may also be terminated with a sigint.

       edit -- allows the user to set up a board position.

       # - command will clear the board.

       c - toggle piece color.

       .  - command will exit setup mode.

       p3b - place a pawn on 3b

       p3b+ - place a promoted pawn on 3b

       p* - place a pawn to the captured pieces

       Pieces are entered by typing a letter (p,l,n,s,g,b,r,k) for  the  piece
       followed by the coordinate.

       The usual warning about the language file applies.

       exit -- exits gnushogi.

       first  --  tells  the computer to move first. Computer begins searching
       for a move.  (same as "go").

       force -- allows the user to enter moves for  both  sides.  To  get  the
       program  to  play  after  a  sequence of moves has been entered use the
       ’black’ or ’white’ commands.

       get -- retrieves a game from disk.  The program will  prompt  the  user
       for a file name.

       hash -- use/don’t use hashfile.

       hashdepth  -- allows the user to change the minimum depth for using the
       hashfile and the number of moves from the beginning of the game to  use

       help  --  displays  a short description of the commands and the current
       status of options.

       go -- tells the computer to move first. Computer begins searching for a
       move.  (same as "first").

       hint  -- causes the program to supply the user with its predicted move.

       level -- allows the user to set time controls such as  60  moves  in  5
       minutes  etc.   In  tournament  mode, the program will vary the time it
       takes for each move depending  on  the  situation.   If  easy  mode  is
       disabled  (using  the  ’easy’  command), the program will often respond
       with its move immediately, saving time on its clock for use later on.

       list -- writes the game moves and  some  statistics  on  search  depth,
       nodes, and time to the file ’shogi.lst’.

       material  --  toggle material flag - draws on no pawns and both sides <

       new -- starts a new game.

       p -- evaluates the board and shows the point score for each piece.  The
       total score for a position is the sum of these individual piece scores.

       post -- causes the program to display the principal variation  and  the
       score  during  the  search.   A  score of 100 is equivalent to a 1 pawn
       advantage for the computer.

       quit -- exits the game.

       random -- causes the program to randomize its move selection  slightly.

       rcptr -- set recapture mode.

       remove -- backout the last level for both sides. Equal to 2 undos.

       reverse -- causes the board display to be reversed.  That is, the black
       pieces will now appear at the top of the board.

       rv -- reverse board display.

       save -- saves a game to disk.  The program will prompt the user  for  a
       file name.

       switch  --  causes  the  program to switch places with the opponent and
       begin searching.

       test  --  performs  some  speed  tests  for  MoveList  and  CaptureList
       generation, and ScorePosition position scoring for the current board.

       time  --  set  computer’s  time  remaining,  intended for synchronizing
       clocks among multiple players.

       tsume -- toggle tsume mode. In tsume mode, not all possible moves  will
       be  generated.  If a king is in check, only moves that get the king out
       of check are generated.  If the king is not in check, only  moves  that
       give check to the opponent’s king are generated.

       undo  --  undoes  the  last  move  whether it was the computer’s or the
       human’s. You may also type "remove". This is equivalent to two "undo"’s
       (e.g. retract one move for each side).

       white  -- causes the computer to take the black pieces, if the computer
       is to move first the go command must be given.

       xget -- read an xshogi position file.

       xsave -- save as an xshogi position file.

       xwndw --  change  X  window.  The  window  around  alpha/beta  used  to
       determine whether the position should be scored or just estimated.