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- /*
- GNU GO - the game of Go (Wei-Chi)
- Version 1.1 last revised 3-1-89
- Copyright (C) Free Software Foundation, Inc.
- written by Man L. Li
- modified by Wayne Iba
- documented by Bob Webber
- */
- /*
- 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
- the Free Software Foundation - version 1.
-
- This program 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 in file COPYING for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Please report any bug/fix, modification, suggestion to
-
- mail address: Man L. Li
- Dept. of Computer Science
- University of Houston
- 4800 Calhoun Road
- Houston, TX 77004
-
- e-mail address: manli@cs.uh.edu (Internet)
- coscgbn@uhvax1.bitnet (BITNET)
- 70070,404 (CompuServe)
- */
-
- #include <stdio.h>
-
- #define EMPTY 0
-
- extern unsigned char p[19][19], ma[19][19];
- extern int mymove;
- extern int lib;
-
- findnextmove(m, n, i, j, val, minlib)
- /* find new move i, j from group containing m, n */
- int m, n, *i, *j, *val, minlib;
- {
- int ti, tj, tval;
- int found = 0;
-
- *i = -1; *j = -1; *val = -1;
- /* mark current position */
- ma[m][n] = 1;
-
- /* check North neighbor */
- if (m != 0)
- if (p[m - 1][n] == EMPTY)
- {
- ti = m - 1;
- tj = n;
- lib = 0;
- countlib(ti, tj, mymove);
- tval = fval(lib, minlib);
- found = 1;
- }
- else
- if ((p[m - 1][n] == mymove) && !ma[m - 1][n])
- if (findnextmove(m - 1, n, &ti, &tj, &tval, minlib))
- found = 1;
-
- if (found)
- {
- found = 0;
- if (tval > *val)
- {
- *val = tval;
- *i = ti;
- *j = tj;
- }
- if (minlib == 1) return 1;
- }
-
- /* check South neighbor */
- if (m != 18)
- if (p[m + 1][n] == EMPTY)
- {
- ti = m + 1;
- tj = n;
- lib = 0;
- countlib(ti, tj, mymove);
- tval = fval(lib, minlib);
- found = 1;
- }
- else
- if ((p[m + 1][n] == mymove) && !ma[m + 1][n])
- if (findnextmove(m + 1, n, &ti, &tj, &tval, minlib))
- found = 1;
-
- if (found)
- {
- found = 0;
- if (tval > *val)
- {
- *val = tval;
- *i = ti;
- *j = tj;
- }
- if (minlib == 1) return 1;
- }
-
- /* check West neighbor */
- if (n != 0)
- if (p[m][n - 1] == EMPTY)
- {
- ti = m;
- tj = n - 1;
- lib = 0;
- countlib(ti, tj, mymove);
- tval = fval(lib, minlib);
- found = 1;
- }
- else
- if ((p[m][n - 1] == mymove) && !ma[m][n - 1])
- if (findnextmove(m, n - 1, &ti, &tj, &tval, minlib))
- found = 1;
-
- if (found)
- {
- found = 0;
- if (tval > *val)
- {
- *val = tval;
- *i = ti;
- *j = tj;
- }
- if (minlib == 1) return 1;
- }
-
- /* check East neighbor */
- if (n != 18)
- if (p[m][n + 1] == EMPTY)
- {
- ti = m;
- tj = n + 1;
- lib = 0;
- countlib(ti, tj, mymove);
- tval = fval(lib, minlib);
- found = 1;
- }
- else
- if ((p[m][n + 1] == mymove) && !ma[m][n + 1])
- if (findnextmove(m, n + 1, &ti, &tj, &tval, minlib))
- found = 1;
-
- if (found)
- {
- found = 0;
- if (tval > *val)
- {
- *val = tval;
- *i = ti;
- *j = tj;
- }
- if (minlib == 1) return 1;
- }
-
- if (*val > 0) /* found next move */
- return 1;
- else /* next move failed */
- return 0;
- } /* end findnextmove */
-
-
- fval(newlib, minlib)
- /* evaluate new move */
- int newlib, minlib;
- {
- int k, val;
-
- if (newlib <= minlib)
- val = -1;
- else
- {
- k = newlib - minlib;
- val = 40 + (k - 1) * 50 / (minlib * minlib * minlib);
- }
- return val;
- } /* end fval */
-