book.h

gun C 环境下编写的

/* GNU Chess 5.0 - book.h - book symbolic definitions
   Copyright (c) 1999-2002 Free Software Foundation, Inc.

   GNU Chess is based on the two research programs 
   Cobalt by Chua Kong-Sian and Gazebo by Stuart Cracraft.

   GNU Chess is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   GNU Chess is distributed in the hope that it will be useful,
   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.

   You should have received a copy of the GNU General Public License
   along with GNU Chess; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.

   Contact Info: 
     [e-mail]
     [e-mail], [e-mail], [e-mail]
*/
#define BOOKSRC "book.src"

/*
 * BookQuery() tries the following filenames in order to find
 * a valid opening book. The array must be NULL-terminated.
 */
static char const * bookbin[] = {
   "book.dat",
   "/usr/share/games/gnuchess/book.dat",
   "/usr/lib/games/gnuchess/book.dat",
   NULL
};

/* The book which BookBuilder() uses */
#define BOOKRUN "book.dat"

#define R_WHITE_WINS 1
#define R_BLACK_WINS 2
#define R_DRAW 3
#define R_NORESULT 4
#define BOOKDEPTH 20  /* We gobble this many moves from each PGN book game */