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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], l[19][19];
- extern int mymove, umove;
- extern int lib;
- extern int uik, ujk; /* piece captured */
-
- suicide(i, j)
- /* check for suicide move of opponent at p[i][j] */
- int i, j;
- {
- int m, n, k;
-
- /* check liberty of new move */
- lib = 0;
- countlib(i, j, umove);
- if (lib == 0)
- /* new move is suicide then check if kill my pieces and Ko possibility */
- {
- /* assume alive */
- p[i][j] = umove;
-
- /* check my pieces */
- eval(mymove);
- k = 0;
-
- for (m = 0; m < 19; m++)
- for (n = 0; n < 19; n++)
- /* count pieces will be killed */
- if ((p[m][n] == mymove) && !l[m][n]) ++k;
-
- if ((k == 0) || (k == 1 && ((i == uik) && (j == ujk))))
- /* either no effect on my pieces or an illegal Ko take back */
- {
- p[i][j] = EMPTY; /* restore to open */
- return 1;
- }
- else
- /* good move */
- return 0;
- }
- else
- /* valid move */
- return 0;
- } /* end suicide */
-
-